HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Philadelphia to St. Louis (PHL - STL) from $58

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/22. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
PHL — STL
May 3 — May 101
From?
To?
Fri 5/3
Fri 5/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

The best prices from Philadelphia to Lambert-St Louis are usually found in February or October, booked 64 days in advance, depart on a Saturday or Wednesday and return on a Tuesday

Cheap flight deals from Philadelphia to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 28, 2024.

Popular in

March

Cheapest in

February

Round-trip from

$323

One-way from

$98
High demand for flights, 11% potential price rise
Search Deals
Best time to find cheap flights, 9% potential price drop
Search Deals
From Philadelphia to Lambert-St Louis
Search Deals
One-way flight from Philadelphia to Lambert-St Louis
Search Deals

What is the cheapest day to fly round-trip from Philadelphia to St. Louis?

Sunday flights are found to be more expensive to fly from Philadelphia to St. Louis. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to St. Louis.

How far in advance should I book a flight from Philadelphia to St. Louis?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 47 days in advance, which can save you up to 91% on flights from Philadelphia to St. Louis compared to booking the week you need them. Waiting 47 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $407. For sooner than that we have options available in the next 3 days from $579.

What is the cheapest month to fly from Philadelphia to St. Louis?

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, February can be a great choice for travel to St. Louis. Flights to St. Louis from Philadelphia in February are about $398 on average during February, but can be found for as low as $180.

When is the cheapest time to fly from Philadelphia to St. Louis (PHL - STL)?

It’s optimal to fly from Philadelphia to St. Louis at noon. By choosing this option you can save up to 37% on the cost of your flight, compared to a flight in the afternoon.

Cheap Frontier flights from Philadelphia to St. Louis

Explore cheap flight options specifically provided by Frontier for the route between Philadelphia and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
Check out some of the cheapest Frontier flights we've come across from Philadelphia to St. Louis. It's recommended that users confirm their flight details before booking.
Wed 5/226:30 amPHL - STL
Nonstop2h 27mFrontier
Sat 5/258:57 amSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/27$58
Wed 5/296:30 amPHL - STL
Nonstop2h 27mFrontier
Wed 6/2610:36 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/27$68
Wed 6/198:19 pmPHL - STL
Nonstop2h 27mFrontier
Sat 6/223:08 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/27$78
Fri 5/3110:53 amPHL - STL
Nonstop2h 27mFrontier
Sat 6/18:57 amSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/27$88
Mon 6/108:19 pmPHL - STL
Nonstop2h 27mFrontier
Wed 6/1910:36 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/27$98
Sat 7/279:17 amPHL - STL
Nonstop2h 30mFrontier
Wed 7/313:32 pmSTL - PHL
Nonstop2h 13mFrontier
Deal found 4/27$103
Wed 7/101:12 pmPHL - STL
Nonstop2h 30mFrontier
Mon 7/1511:21 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 4/27$121
Mon 5/273:30 pmPHL - STL
Nonstop2h 27mFrontier
Mon 6/37:18 amSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/27$138
Wed 5/296:30 amPHL - STL
Nonstop2h 27mFrontier
Sat 6/19:29 pmSTL - PHL
1 stop9h 21mFrontier
Deal found 4/26$158

Cheap Spirit Airlines flights from Philadelphia to St. Louis

Explore cheap flight options specifically provided by Spirit Airlines for the route between Philadelphia and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
Some of the best deals we've found on Spirit Airlines flights traveling from Philadelphia to St. Louis. Deals are refreshing constantly so come back soon for more options.
Tue 5/77:20 amPHL - STL
3 stops28h 26mSpirit Airlines
Tue 5/142:35 pmSTL - PHL
2 stops17h 25mSpirit Airlines
Deal found 4/28$151
Wed 5/224:17 pmPHL - STL
1 stop26h 12mSpirit Airlines
Sat 5/255:15 pmSTL - PHL
1 stop14h 45mSpirit Airlines
Deal found 4/27$159
Tue 5/77:20 amPHL - STL
3 stops28h 26mSpirit Airlines
Tue 5/142:35 pmSTL - PHL
3 stops23h 42mSpirit Airlines
Deal found 4/28$164
Fri 5/174:31 pmPHL - STL
2 stops18h 57mSpirit Airlines
Tue 5/2110:34 amSTL - PHL
2 stops20h 30mSpirit Airlines
Deal found 4/27$171
Fri 5/174:31 pmPHL - STL
2 stops18h 57mSpirit Airlines
Tue 5/2110:34 amSTL - PHL
1 stop13h 08mSpirit Airlines
Deal found 4/27$172
Tue 5/74:00 pmPHL - STL
2 stops19h 46mSpirit Airlines
Tue 5/142:35 pmSTL - PHL
2 stops17h 25mSpirit Airlines
Deal found 4/28$178
Sat 5/257:57 pmPHL - STL
1 stop22h 32mSpirit Airlines
Sat 6/15:15 pmSTL - PHL
1 stop14h 45mSpirit Airlines
Deal found 4/27$180
Wed 6/55:12 pmPHL - STL
1 stop25h 16mSpirit Airlines
Sun 6/96:55 pmSTL - PHL
1 stop27h 32mSpirit Airlines
Deal found 4/28$185
Fri 5/174:31 pmPHL - STL
2 stops18h 57mSpirit Airlines
Tue 5/2110:34 amSTL - PHL
3 stops27h 35mSpirit Airlines
Deal found 4/27$186

Cheap Philadelphia to St. Louis flights in April & May 2024

Find cheap flight options from Philadelphia to St. Louis specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,944,896 searches. Prices were last updated on April 28, 2024.
These are some of the best deals we've found on flights to St. Louis in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.
Fri 5/311:15 pmPHL - STL
1 stop21h 10mFrontier
Wed 6/510:36 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/27$158
Mon 5/273:30 pmPHL - STL
Nonstop2h 27mFrontier
Mon 6/38:04 pmSTL - PHL
1 stop14h 55mFrontier
Deal found 4/27$164
Mon 5/273:30 pmPHL - STL
Nonstop2h 27mFrontier
Mon 6/39:20 pmSTL - PHL
2 stops14h 45mFrontier
Deal found 4/27$169
Mon 5/279:05 amPHL - STL
1 stop25h 34mMultiple Airlines
Mon 6/37:18 amSTL - PHL
Nonstop2h 14mMultiple Airlines
Deal found 4/27$170
Fri 5/174:31 pmPHL - STL
2 stops18h 57mSpirit Airlines
Tue 5/2110:34 amSTL - PHL
2 stops20h 30mSpirit Airlines
Deal found 4/27$171
Fri 5/174:31 pmPHL - STL
2 stops18h 57mSpirit Airlines
Tue 5/2110:34 amSTL - PHL
1 stop13h 08mSpirit Airlines
Deal found 4/27$172
Wed 5/810:29 amPHL - STL
3 stops31h 16mMultiple Airlines
Tue 5/142:35 pmSTL - PHL
2 stops17h 25mMultiple Airlines
Deal found 4/27$174
Sat 5/1811:02 pmPHL - STL
1 stop9h 06mFrontier
Mon 5/209:26 pmSTL - PHL
1 stop23h 15mFrontier
Deal found 4/26$175
Thu 5/236:31 amPHL - STL
1 stop13h 09mMultiple Airlines
Mon 5/275:57 pmSTL - PHL
Nonstop2h 14mMultiple Airlines
Deal found 4/27$177

Philadelphia to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Philadelphia and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
These are some of the best deals we've found on flights to St. Louis in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.
Wed 5/296:30 amPHL - STL
Nonstop2h 27mFrontier
Wed 6/2610:36 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/28$68
Wed 6/198:19 pmPHL - STL
Nonstop2h 27mFrontier
Sat 6/223:08 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/28$78
Sat 6/2212:51 pmPHL - STL
Nonstop2h 27mFrontier
Mon 6/2410:36 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/28$88
Mon 6/108:19 pmPHL - STL
Nonstop2h 27mFrontier
Wed 6/1910:36 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/28$98
Wed 5/294:17 pmPHL - STL
1 stop26h 12mMultiple Airlines
Wed 6/2610:36 pmSTL - PHL
Nonstop2h 14mMultiple Airlines
Deal found 4/28$119
Sat 6/2912:51 pmPHL - STL
Nonstop2h 27mFrontier
Sat 7/611:47 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 4/28$121
Wed 5/157:18 pmPHL - STL
1 stop24h 22mSpirit Airlines
Tue 5/2110:34 amSTL - PHL
1 stop21h 26mSpirit Airlines
Deal found 4/28$124
Fri 5/3110:53 amPHL - STL
Nonstop2h 27mMultiple Airlines
Tue 6/410:34 amSTL - PHL
1 stop21h 26mMultiple Airlines
Deal found 4/28$129
Sat 5/2512:05 pmPHL - STL
1 stop9h 25mMultiple Airlines
Sat 6/18:57 amSTL - PHL
Nonstop2h 14mMultiple Airlines
Deal found 4/27$137

Non-stop flights to St. Louis from Philadelphia

Discover non-stop flight options from Philadelphia to St. Louis. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
Consider booking one of these non-stop flights heading from Philadelphia to St. Louis. Users can also choose from other Philadelphia to St. Louis flights by using the search form above.
Wed 5/226:30 amPHL - STL
Nonstop2h 27mFrontier
Sat 5/258:57 amSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/27$58
Wed 5/296:30 amPHL - STL
Nonstop2h 27mFrontier
Wed 6/2610:36 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/27$68
Wed 6/198:19 pmPHL - STL
Nonstop2h 27mFrontier
Sat 6/223:08 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/27$78
Fri 5/3110:53 amPHL - STL
Nonstop2h 27mFrontier
Sat 6/18:57 amSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/27$88
Mon 6/108:19 pmPHL - STL
Nonstop2h 27mFrontier
Wed 6/1910:36 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/27$98
Sat 7/279:17 amPHL - STL
Nonstop2h 30mFrontier
Wed 7/313:32 pmSTL - PHL
Nonstop2h 13mFrontier
Deal found 4/27$103
Wed 7/101:12 pmPHL - STL
Nonstop2h 30mFrontier
Mon 7/1511:21 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 4/27$121
Mon 5/273:30 pmPHL - STL
Nonstop2h 27mFrontier
Mon 6/37:18 amSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/27$138
Fri 5/2410:53 amPHL - STL
Nonstop2h 27mFrontier
Mon 5/275:57 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/28$158

Philadelphia to St. Louis flights leaving soon

Find last-minute flight options from Philadelphia to St. Louis for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
Have a look at some of the flights available from Philadelphia to St. Louis departing last-minute. Users should be sure to double check the price, date, and time of their last-minute flight.
Tue 5/77:20 amPHL - STL
3 stops28h 26mSpirit Airlines
Tue 5/142:35 pmSTL - PHL
2 stops17h 25mSpirit Airlines
Deal found 4/28$151
Tue 5/77:20 amPHL - STL
3 stops28h 26mSpirit Airlines
Tue 5/142:35 pmSTL - PHL
3 stops23h 42mSpirit Airlines
Deal found 4/28$164
Wed 5/810:29 amPHL - STL
3 stops31h 16mMultiple Airlines
Tue 5/142:35 pmSTL - PHL
2 stops17h 25mMultiple Airlines
Deal found 4/27$174
Tue 5/74:00 pmPHL - STL
2 stops19h 46mSpirit Airlines
Tue 5/142:35 pmSTL - PHL
2 stops17h 25mSpirit Airlines
Deal found 4/28$178
Wed 5/86:00 amPHL - STL
3 stops35h 45mMultiple Airlines
Tue 5/142:35 pmSTL - PHL
3 stops28h 15mMultiple Airlines
Deal found 4/27$196
Mon 5/66:06 pmPHL - STL
1 stop16h 38mMultiple Airlines
Wed 5/88:04 pmSTL - PHL
1 stop8h 31mMultiple Airlines
Deal found 4/28$200
Wed 5/88:45 amPHL - STL
1 stop13h 08mMultiple Airlines
Tue 5/142:35 pmSTL - PHL
1 stop26h 53mMultiple Airlines
Deal found 4/27$204
Tue 5/76:26 amPHL - STL
1 stop8h 18mSpirit Airlines
Tue 5/142:35 pmSTL - PHL
2 stops17h 25mSpirit Airlines
Deal found 4/28$212
Tue 5/78:40 pmPHL - STL
1 stop14h 07mFrontier
Tue 5/147:16 pmSTL - PHL
1 stop14h 42mFrontier
Deal found 4/28$237

One-way flights to St. Louis from Philadelphia

Search for one-way flight options from Philadelphia to St. Louis. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
Take a look at some of the best available options we've come across on one-way flights from Philadelphia to St. Louis. Those seeking round-trip flights from Philadelphia to St. Louis should utilize the search form at the the top of the page.
Mon 5/66:06 pmPHL - STL
1 stop16h 38mSpirit Airlines
Deal found 4/26$66
Sun 5/265:10 amPHL - STL
1 stop13h 19mSpirit Airlines
Deal found 4/26$69
Wed 7/31:12 pmPHL - STL
Nonstop2h 30mFrontier
Deal found 4/27$82
Sun 5/2610:40 amPHL - STL
Nonstop2h 32mAmerican Airlines
Deal found 4/26$85
Thu 5/305:10 amPHL - STL
1 stop13h 19mSpirit Airlines
Deal found 4/27$88
Fri 5/2410:53 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/27$89
Mon 5/61:01 pmPHL - STL
2 stops21h 43mSpirit Airlines
Deal found 4/26$94
Thu 5/309:00 amPHL - STL
1 stop7h 57mDelta
Deal found 4/28$98
Sat 5/1811:02 pmPHL - STL
1 stop9h 06mFrontier
Deal found 4/28$119

Find flights from Philadelphia to St. Louis within your budget

Customize your flight search to find flights from Philadelphia to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$58 - $234

Route

Depart

Return

Price

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Wed 5/22

Nonstop2h 27m

Lambert-St Louis

Sat 5/25

Nonstop2h 14m

$58

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Wed 5/29

Nonstop2h 27m

Lambert-St Louis

Wed 6/26

Nonstop2h 14m

$68

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Wed 6/19

Nonstop2h 27m

Lambert-St Louis

Sat 6/22

Nonstop2h 14m

$78

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Fri 5/31

Nonstop2h 27m

Lambert-St Louis

Sat 6/1

Nonstop2h 14m

$88

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Wed 5/29

1 stop26h 12m

Lambert-St Louis

Wed 6/26

Nonstop2h 14m

$119

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Fri 5/31

Nonstop2h 27m

Lambert-St Louis

Tue 6/4

1 stop21h 26m

$129

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Wed 5/22

1 stop26h 12m

Lambert-St Louis

Sat 5/25

1 stop14h 45m

$159

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Wed 5/29

1 stop4h 19m

Lambert-St Louis

Wed 6/26

1 stop3h 59m

$196

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Thu 5/23

Nonstop2h 38m

Lambert-St Louis

Mon 5/27

Nonstop2h 10m

$234

Flights are sorted by cheapest first

Deals found on 4/27

When is the best time to book a flight from Philadelphia to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to St. Louis. Price data was last updated on January 28, 2024.
Booking 64 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Search Deals

When is the cheapest time to fly from Philadelphia to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to St. Louis. Price data was last updated on April 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Philadelphia to St. Louis flight should consider departing on Tuesday at noon when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to St. Louis by month

Plan your trip from Philadelphia to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from Philadelphia to St. Louis is currently $88 while a round-trip flight costs $125. Price data was last updated on April 21, 2024.

Currently, September is the cheapest month in which you can book a flight from Philadelphia to St. Louis (average of $323). Flying from Philadelphia to St. Louis in July is currently the most expensive (average of $378). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$326

February

$331

March

$357

April

$337

May

$350

June

$373

July

$378

August

$336

September

$323

October

$323

November

$336

December

$326

Temperature and rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature and rainfall totals by month.

STL

Temperature

32 - 80.6 °F

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated April 28, 2024.
To help decide which airline to fly from Philadelphia to St. Louis, see what other customers have to say about Frontier, Spirit Airlines and American Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,932 reviews
Check prices

Food

7.4

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Overall

8.1

Crew

8.6

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Delta
8.1
Very good
10,932 reviews
Delta
8.1
Very good
10,932 reviews
Check prices

Food

7.4

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Overall

8.1

Crew

8.6

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

United Airlines
7.4
Good
11,221 reviews
Delta
8.1
Very good
10,932 reviews
Check prices

Food

7.4

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Overall

8.1

Crew

8.6

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

American Airlines
7.3
Good
14,844 reviews
Delta
8.1
Very good
10,932 reviews
Check prices

Food

7.4

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Overall

8.1

Crew

8.6

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Spirit Airlines
6.4
Okay
8,739 reviews
Delta
8.1
Very good
10,932 reviews
Check prices

Food

7.4

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Overall

8.1

Crew

8.6

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Frontier
6.3
Okay
4,129 reviews
Delta
8.1
Very good
10,932 reviews
Check prices

Food

7.4

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Overall

8.1

Crew

8.6

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Philadelphia to St. Louis?

    Lambert-St Louis is the airport most travelers will use when flying to St. Louis from Philadelphia. Booking flights from Philadelphia (PHL) to Lambert-St Louis (STL) should be relatively easy as there are 3 daily flights to St. Louis from 5 different airlines. 2h 27m is how long a flight from Philadelphia to Lambert-St Louis will take if you book a nonstop flight.

  • Can I find flights from Philadelphia to St. Louis for under $100 on Cheapflights?

    Yes, there are multiple flights from Philadelphia to St. Louis for under $100. The cheapest flight booked recently is on Frontier for just $58, but on average you can expect to pay $131.

  • Are there nonstop flights from Philadelphia to St. Louis for under $100 on Cheapflights?

    Cheapflights has at least 20 direct flights from Philadelphia to St. Louis under $100. A good price for a nonstop flight from Philadelphia to St. Louis is less than $176.

  • Are there last-minute flights available from Philadelphia to St. Louis for under $200?

    There are currently 20+ open flights from Philadelphia to St. Louis within the next 7 days for less than $200.

  • What are the cheapest airlines flying from Philadelphia to St. Louis round-trip?

    Cheapflights users have booked flights from Philadelphia to St. Louis round-trip from $58. Other airlines that can offer you cheap pricing are Spirit Airlines, from $159, and Delta, from $196. These flights start at 85% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Philadelphia to St. Louis one-way?

    The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $66. However, be on the lookout for offers from Frontier and American Airlines, as they are both options that can get you from Philadelphia to St. Louis for a low price.

  • What are the most popular airlines that fly from Philadelphia to St. Louis?

    When booking a flight from Philadelphia to St. Louis, you may want to consider flying on American Airlines, Delta or Frontier as they are the most popular for this route.

  • What are the most reliable airlines from Philadelphia to St. Louis?

    Consider British Airways (88%), Iberia (83%) or Southwest (79%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to St. Louis.

  • What are the cheapest flights from Philadelphia to St. Louis?

    Looking for the cheapest flight from Philadelphia to St. Louis? While on average our users pay $246, our data indicates the cheapest price to be $55. The most popular route (Philadelphia - Lambert-St Louis), is priced around $119.

  • What does PHL to STL mean?

    PHL stands for Philadelphia Airport, while STL stands for Lambert-St Louis Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Can I find deals for flights from Philadelphia to St. Louis that include extra baggage allowance?

    The amount of baggage you can bring on your Philadelphia to St. Louis flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Philadelphia to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter Philadelphia to St. Louis flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Philadelphia to St. Louis that include hotel bookings?

    Yes. In addition to deals on Philadelphia to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to St. Louis.

  • Can I find deals for business class flights from Philadelphia to St. Louis?

    Yes. Cheapflights offers flight deals from Philadelphia to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Philadelphia to St. Louis that allow pets onboard?

    Many airlines flying from Philadelphia to St. Louis offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Philadelphia to St. Louis?

    Yes, you can often find last-minute deals on Philadelphia to St. Louis flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Philadelphia to St. Louis flight deals updated?

    The Philadelphia to St. Louis flight deals you see on this page were last updated on 4/28.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Philadelphia to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.

Philadelphia to Kansas City flights
Scranton to Kansas City flights
Pittsburgh to Kansas City flights
Harrisburg to Kansas City flights
Pittsburgh to St. Louis flights
Pittsburgh to Springfield flights
Allentown to St. Louis flights
Philadelphia to Springfield flights
Harrisburg to St. Louis flights
Allentown to Kansas City flights
Allentown to Springfield flights
Scranton to St. Louis flights
Harrisburg to Springfield flights
State College to Kansas City flights
Philadelphia to Columbia flights
Pittsburgh to Joplin flights
Latrobe to Kansas City flights
State College to St. Louis flights
Harrisburg to Joplin flights
Erie to St. Louis flights
State College to Springfield flights
Philadelphia to Cape Girardeau flights
Philadelphia to Joplin flights
Philadelphia to Branson flights
Williamsport to St. Louis flights
Erie to Joplin flights
Scranton to Springfield flights
Scranton to Joplin flights
Allentown to Joplin flights
Allentown to Columbia flights

Top 5 airlines flying from Philadelphia to St. Louis

Discover the top 5 airlines that operate flights from Philadelphia to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$81Average$204FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$127Average$189FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
American AirlinesCheapest$228Average$382FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$259Average$463FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$278Average$418FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Detroit to Hawaii flights
Newark Airport to Dallas flights
Boston to Nashville flights
Dallas to London flights
Nashville to Dallas flights
Boston to Austin flights
New York to Hawaii flights
Los Angeles to Fort Lauderdale flights
St. Louis to Los Angeles flights
Boston to Dublin flights
Boston to Las Vegas flights
Philadelphia to London Stansted Airport flights

Search flights from Philadelphia to St. Louis by cabin class

Find flights from Philadelphia to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Hourly flight availability from Philadelphia to St. Louis

Find hourly flight availability from Philadelphia to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 28, 2024.
1%of flight departuresEarly morningMidnight to 6 am
10%of flight departuresMorning6 am to noon
0%of flight departuresAfternoonNoon to 6 pm
89%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Philadelphia to St. Louis

Explore weekly flight availability from Philadelphia to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 28, 2024.
Sunday3daily flights
Monday4daily flights
Tuesday4daily flights
Wednesday3daily flights
Thursday4daily flights
Friday3daily flights
Saturday4daily flights

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Perugia Sant Egidio
Flights to Biarritz Parme
Flights to Argostoli Cephalonia
Flights to Melilla
Flights to Milas–Bodrum
Flights to Girona Costa Brava
Flights to Hakodate
Flights to Fez Sais
Flights to Constantine Ain El Bey
Flights to Zakynthos Dionsios Salomos
Flights to Bourgas
Flights to Bodø
Flights to Reggio Calabria Tito Menniti
Flights to Bastia Poretta
Flights to Skiathos
Flights to Kalamata
Flights to Batumi
Flights to Menorca/Mahon
Flights to Kristiansand Kjevik
Flights to Champaign University-Willard
Flights to Kagoshima
Flights to Ohrid
Flights to Clermont-Ferrand Aulnat
Flights to Parikia Paros

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Philadelphia to St. Louis?

Cheapflights helps you search for flights from Philadelphia to St. Louis via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Philadelphia to St. Louis?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to St. Louis from Philadelphia.

Can Cheapflights find flights from Philadelphia to St. Louis with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Philadelphia to St. Louis flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Philadelphia to St. Louis become cheaper?

Yes, Cheapflights offers price alerts on Philadelphia to St. Louis flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines