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Cheap flights from Portland to St. Louis (PDX - STL) from $51

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/21. 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.
PDX — STL
May 6 — May 131
From?
To?
Mon 5/6
Mon 5/13
1 adult, Economy
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The best prices from Portland to Lambert-St Louis are usually found in January or February, booked 12 days in advance, depart on a Saturday or Tuesday and return on a Saturday

Cheap flight deals from Portland to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) 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 May 1, 2024.

Popular in

December

Cheapest in

January

Round-trip from

$322

One-way from

$129
High demand for flights, 28% potential price rise
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Best time to find cheap flights, 25% potential price drop
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From Portland to Lambert-St Louis
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One-way flight from Portland to Lambert-St Louis
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What is the cheapest day to fly round-trip from Portland to St. Louis?

Travelers have found that booking a Friday departure is the best way to save up to 15% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

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

To save on the cost of your flight from Portland to St. Louis, book at least 13 days before your planned departure. Booking around this time can save you about 94% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $234 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $455.

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

January can be a great time to fly to St. Louis from Portland with a flight ticket averaging about $457. Cheapflights users have found deals in the month of January for as cheap as $194. The most expensive prices can be found in the month of December.

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

Unlike in the morning, when flights are generally more expensive, you can save up to 21% on flights from Portland to St. Louis by exploring options for tickets in the evening.

Cheap Spirit Airlines flights from Portland to St. Louis

Explore cheap flight options specifically provided by Spirit Airlines for the route between Portland 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 2,899,487 searches. Data last updated May 1, 2024.
Take a peek at the cheapest Spirit Airlines flights we've detected traveling from Portland to St. Louis. Come back soon if you're not finding the exact deal you're looking for.
Tue 5/1412:00 pmPDX - STL
1 stop20h 46mSpirit Airlines
Fri 5/174:05 pmSTL - PDX
1 stop10h 26mSpirit Airlines
Deal found 5/1$145
Mon 5/131:05 pmPDX - STL
2 stops22h 32mSpirit Airlines
Wed 5/1511:36 amSTL - PDX
1 stop14h 31mSpirit Airlines
Deal found 4/30$161
Fri 5/316:00 amPDX - STL
1 stop7h 14mSpirit Airlines
Tue 6/410:34 amSTL - PDX
2 stops26h 19mSpirit Airlines
Deal found 4/30$164
Fri 5/3111:30 pmPDX - STL
2 stops14h 55mSpirit Airlines
Tue 6/410:34 amSTL - PDX
2 stops26h 19mSpirit Airlines
Deal found 4/30$227
Fri 5/246:00 amPDX - STL
1 stop7h 14mSpirit Airlines
Mon 5/274:05 pmSTL - PDX
1 stop25h 02mSpirit Airlines
Deal found 4/30$234
Fri 6/76:00 amPDX - STL
1 stop6h 16mSpirit Airlines
Mon 6/102:41 pmSTL - PDX
1 stop11h 48mSpirit Airlines
Deal found 5/1$247
Mon 5/131:05 pmPDX - STL
2 stops22h 32mSpirit Airlines
Thu 5/166:19 pmSTL - PDX
3 stops43h 56mSpirit Airlines
Deal found 4/30$262
Thu 6/610:16 pmPDX - STL
1 stop14h 00mSpirit Airlines
Wed 6/121:55 pmSTL - PDX
2 stops20h 54mSpirit Airlines
Deal found 5/1$263
Thu 6/610:16 pmPDX - STL
1 stop14h 00mSpirit Airlines
Tue 6/1111:57 amSTL - PDX
2 stops27h 12mSpirit Airlines
Deal found 4/30$276

Cheap Frontier flights from Portland to St. Louis

Explore cheap flight options specifically provided by Frontier for the route between Portland 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 2,899,487 searches. Data last updated May 1, 2024.
Take a gander at the lowest prices we've found on Frontier flights from Portland to St. Louis. Make sure to examine the flight information before completing your reservation.
Sat 5/1110:20 amPDX - STL
1 stop21h 58mFrontier
Tue 5/144:50 pmSTL - PDX
1 stop9h 09mFrontier
Deal found 5/1$169
Sun 5/1212:59 amPDX - STL
1 stop6h 48mFrontier
Mon 5/2010:21 pmSTL - PDX
1 stop12h 28mFrontier
Deal found 5/1$170
Tue 9/312:48 amPDX - STL
1 stop6h 49mFrontier
Sun 9/87:29 pmSTL - PDX
1 stop22h 25mFrontier
Deal found 4/30$172
Mon 5/2012:43 amPDX - STL
1 stop10h 26mFrontier
Sat 5/258:04 pmSTL - PDX
1 stop15h 07mFrontier
Deal found 4/30$173
Sat 5/1112:59 amPDX - STL
1 stop11h 30mFrontier
Sat 5/188:04 pmSTL - PDX
1 stop15h 07mFrontier
Deal found 4/30$174
Sat 5/1112:59 amPDX - STL
1 stop11h 30mFrontier
Wed 5/158:04 pmSTL - PDX
1 stop12h 44mFrontier
Deal found 4/30$175
Fri 9/64:30 pmPDX - STL
1 stop15h 48mFrontier
Mon 9/97:29 pmSTL - PDX
1 stop22h 25mFrontier
Deal found 4/30$176
Sun 6/212:48 amPDX - STL
1 stop6h 48mFrontier
Thu 6/63:32 pmSTL - PDX
1 stop17h 16mFrontier
Deal found 4/30$178
Mon 5/1310:10 amPDX - STL
1 stop21h 59mFrontier
Tue 5/144:50 pmSTL - PDX
1 stop9h 09mFrontier
Deal found 4/30$179

Cheap Portland to St. Louis flights in May & June 2024

Find cheap flight options from Portland to St. Louis specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,899,487 searches. Prices were last updated on May 1, 2024.
Scroll through some of the best deals on flights from Portland to St. Louis in 2024. Check back regularly for other flight deals.
Tue 5/143:57 pmPDX - STL
1 stop16h 49mSpirit Airlines
Fri 5/174:05 pmSTL - PDX
1 stop10h 26mSpirit Airlines
Deal found 5/1$143
Tue 5/143:57 pmPDX - STL
1 stop16h 49mMultiple Airlines
Sat 5/188:04 pmSTL - PDX
1 stop15h 07mMultiple Airlines
Deal found 4/30$156
Mon 5/131:05 pmPDX - STL
2 stops22h 32mSpirit Airlines
Wed 5/1511:36 amSTL - PDX
1 stop14h 31mSpirit Airlines
Deal found 4/30$161
Fri 5/316:00 amPDX - STL
1 stop7h 14mSpirit Airlines
Tue 6/410:34 amSTL - PDX
2 stops26h 19mSpirit Airlines
Deal found 4/30$164
Tue 5/213:57 pmPDX - STL
1 stop16h 49mMultiple Airlines
Sat 5/258:04 pmSTL - PDX
2 stops25h 16mMultiple Airlines
Deal found 4/30$166
Sat 5/1110:20 amPDX - STL
1 stop21h 58mFrontier
Tue 5/144:50 pmSTL - PDX
1 stop9h 09mFrontier
Deal found 5/1$169
Sun 5/1212:59 amPDX - STL
1 stop6h 48mFrontier
Mon 5/2010:21 pmSTL - PDX
1 stop12h 28mFrontier
Deal found 5/1$170
Mon 5/2012:43 amPDX - STL
1 stop10h 26mFrontier
Sat 5/258:04 pmSTL - PDX
1 stop15h 07mFrontier
Deal found 4/30$173
Wed 5/812:59 amPDX - STL
1 stop7h 39mFrontier
Sun 5/1210:59 pmSTL - PDX
1 stop12h 11mFrontier
Deal found 4/30$174

Portland to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Portland and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 1, 2024.
Scroll through some of the best deals on flights from Portland to St. Louis in 2024. Check back regularly for other flight deals.
Tue 5/143:57 pmPDX - STL
1 stop16h 49mSpirit Airlines
Fri 5/174:05 pmSTL - PDX
1 stop10h 26mSpirit Airlines
Deal found 5/1$143
Tue 5/143:57 pmPDX - STL
1 stop16h 49mMultiple Airlines
Sat 5/188:04 pmSTL - PDX
1 stop15h 07mMultiple Airlines
Deal found 4/30$156
Mon 5/131:05 pmPDX - STL
2 stops22h 32mSpirit Airlines
Wed 5/1511:36 amSTL - PDX
1 stop14h 31mSpirit Airlines
Deal found 4/30$161
Fri 5/316:00 amPDX - STL
1 stop7h 14mSpirit Airlines
Tue 6/410:34 amSTL - PDX
2 stops26h 19mSpirit Airlines
Deal found 4/30$164
Tue 5/213:57 pmPDX - STL
1 stop16h 49mMultiple Airlines
Sat 5/258:04 pmSTL - PDX
2 stops25h 16mMultiple Airlines
Deal found 4/30$166
Sat 5/1110:20 amPDX - STL
1 stop21h 58mFrontier
Tue 5/144:50 pmSTL - PDX
1 stop9h 09mFrontier
Deal found 5/1$169
Sun 5/1212:59 amPDX - STL
1 stop6h 48mFrontier
Mon 5/2010:21 pmSTL - PDX
1 stop12h 28mFrontier
Deal found 5/1$170
Tue 9/312:48 amPDX - STL
1 stop6h 49mFrontier
Sun 9/87:29 pmSTL - PDX
1 stop22h 25mFrontier
Deal found 4/30$172
Mon 5/2012:43 amPDX - STL
1 stop10h 26mFrontier
Sat 5/258:04 pmSTL - PDX
1 stop15h 07mFrontier
Deal found 4/30$173

Portland to St. Louis flights leaving soon

Find last-minute flight options from Portland 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 2,899,487 searches. Data last updated May 1, 2024.
Have a look at some of the last-minute flights available departing from Portland to St. Louis. To prevent any unwanted surprises, users should verify their flight info before booking.
Sat 5/1110:20 amPDX - STL
1 stop21h 58mFrontier
Tue 5/144:50 pmSTL - PDX
1 stop9h 09mFrontier
Deal found 5/1$169
Wed 5/812:59 amPDX - STL
1 stop7h 39mFrontier
Sun 5/1210:59 pmSTL - PDX
1 stop12h 11mFrontier
Deal found 4/30$174
Sat 5/1112:59 amPDX - STL
1 stop11h 30mFrontier
Wed 5/158:04 pmSTL - PDX
1 stop12h 44mFrontier
Deal found 4/30$175
Wed 5/812:59 amPDX - STL
1 stop7h 39mFrontier
Sun 5/1210:59 pmSTL - PDX
1 stop12h 11mFrontier
Deal found 4/30$179
Wed 5/812:59 amPDX - STL
1 stop7h 39mFrontier
Sat 5/117:51 pmSTL - PDX
1 stop15h 24mFrontier
Deal found 4/30$181
Sat 5/1110:20 amPDX - STL
1 stop21h 58mFrontier
Thu 5/1611:06 pmSTL - PDX
1 stop26h 37mFrontier
Deal found 4/30$184
Sat 5/1110:20 amPDX - STL
1 stop21h 58mFrontier
Wed 5/158:04 pmSTL - PDX
2 stops25h 08mFrontier
Deal found 4/30$190
Fri 5/1010:16 pmPDX - STL
1 stop11h 23mFrontier
Sat 5/258:04 pmSTL - PDX
2 stops25h 16mFrontier
Deal found 5/1$193
Fri 5/1010:16 pmPDX - STL
1 stop11h 23mFrontier
Sat 5/258:04 pmSTL - PDX
2 stops25h 16mFrontier
Deal found 4/30$194

One-way flights to St. Louis from Portland

Search for one-way flight options from Portland 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 2,899,487 searches. Data last updated May 1, 2024.
Take a look at some of the best available options we've come across on one-way flights from Portland to St. Louis. Users needing a return flight from Portland to St. Louis should utilize the search form above.
Tue 5/213:57 pmPDX - STL
1 stop16h 49mSpirit Airlines
Deal found 5/1$51
Mon 5/135:20 amPDX - STL
1 stop7h 54mSpirit Airlines
Deal found 4/30$89
Wed 5/812:59 amPDX - STL
1 stop7h 39mFrontier
Deal found 4/30$90
Mon 8/1912:48 amPDX - STL
1 stop9h 02mFrontier
Deal found 4/30$91
Tue 8/1312:48 amPDX - STL
1 stop6h 49mFrontier
Deal found 4/30$92
Fri 5/1010:16 pmPDX - STL
1 stop11h 23mFrontier
Deal found 5/1$95
Tue 8/204:30 pmPDX - STL
1 stop15h 48mFrontier
Deal found 4/30$96
Fri 9/64:30 pmPDX - STL
1 stop15h 48mFrontier
Deal found 4/29$99
Thu 7/412:48 amPDX - STL
1 stop6h 49mFrontier
Deal found 5/1$100

Find flights from Portland to St. Louis within your budget

Customize your flight search to find flights from Portland 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 2,899,487 searches. Data last updated May 1, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$145 - $315

Route

Depart

Return

Price

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Tue 5/14

1 stop20h 46m

Lambert-St Louis

Fri 5/17

1 stop10h 26m

$145

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Tue 5/14

1 stop16h 49m

Lambert-St Louis

Sat 5/18

1 stop15h 07m

$156

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Mon 5/13

2 stops22h 32m

Lambert-St Louis

Wed 5/15

1 stop14h 31m

$161

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Tue 5/21

1 stop16h 49m

Lambert-St Louis

Sat 5/25

2 stops25h 16m

$166

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Sat 5/11

1 stop21h 58m

Lambert-St Louis

Tue 5/14

1 stop9h 09m

$169

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Sun 5/12

1 stop6h 48m

Lambert-St Louis

Mon 5/20

1 stop12h 28m

$170

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Wed 5/29

1 stop5h 25m

Lambert-St Louis

Mon 6/3

1 stop6h 52m

$280

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Thu 8/22

1 stop10h 25m

Lambert-St Louis

Sun 8/25

1 stop10h 03m

$289

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Sat 5/18

1 stop8h 34m

Lambert-St Louis

Tue 5/28

1 stop5h 54m

$315

Flights are sorted by cheapest first

Deals found on 5/1

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

Use this chart to determine the optimal time to book a round-trip flight from Portland to St. Louis. Price data was last updated on January 28, 2024.
The best time to book flights from Portland to St. Louis is 12 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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When is the cheapest time to fly from Portland to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Portland to St. Louis. Price data was last updated on April 28, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Portland to St. Louis flight should consider departing on Monday evenings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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Average price of flights to St. Louis by month

Plan your trip from Portland to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from Portland to St. Louis is currently $89 while a round-trip flight costs $206. Price data was last updated on April 28, 2024.

Currently, September is the cheapest month in which you can book a flight from Portland to St. Louis (average of $322). Flying from Portland to St. Louis in July is currently the most expensive (average of $377). 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

$345

June

$371

July

$377

August

$336

September

$322

October

$324

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 May 1, 2024.
Read through reviews of airlines operating flights from Portland to St. Louis, such as Spirit Airlines, Frontier and Alaska Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Food

7.3

Crew

8.6

Overall

8.1

Comfort

7.9

Boarding

8.2

Entertainment

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,115 reviews
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Food

7.3

Crew

8.6

Overall

8.1

Comfort

7.9

Boarding

8.2

Entertainment

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Delta
8.1
Very good
10,874 reviews
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Food

7.3

Crew

8.6

Overall

8.1

Comfort

7.9

Boarding

8.2

Entertainment

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines
7.4
Good
11,159 reviews
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Food

7.3

Crew

8.6

Overall

8.1

Comfort

7.9

Boarding

8.2

Entertainment

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

American Airlines
7.3
Good
14,788 reviews
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Food

7.3

Crew

8.6

Overall

8.1

Comfort

7.9

Boarding

8.2

Entertainment

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Sun Country Air
7.3
Good
650 reviews
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Food

7.3

Crew

8.6

Overall

8.1

Comfort

7.9

Boarding

8.2

Entertainment

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Related info for your journey

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

  • Can I find flights from Portland to St. Louis for under $200 on Cheapflights?

    Yes, there are multiple flights from Portland to St. Louis for under $200. The cheapest flight booked recently is on Spirit Airlines for just $145, but on average you can expect to pay $172.

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

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

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

    Currently priced at $145, Spirit Airlines will fly you from Portland to St. Louis and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Frontier for as low as $169. Users have found that Spirit Airlines is 68% cheaper than the other options available to this destination.

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

    To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $51. Frontier flights start at $90 while deals on Alaska Airlines start at $135 one-way.

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

    Before booking your flight from Portland to St. Louis check out the most popular airlines for this route: American Airlines, Alaska Airlines or Delta.

  • What does PDX to STL mean?

    PDX stands for Portland 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.

  • Where are the most common layover locations when flying from Portland to St. Louis?

    Portland to St. Louis flights have a layover in Denver most of the time.

  • What are some popular things to do or see while on a layover in Denver?

    If you're on a layover in Denver and looking for things to do, consider visiting Coors Field, 16th Street Mall, or Civic Center Park. Coors Field, 16th Street Mall, and Civic Center Park are located about 18.4 mi, 18.7 mi, and 18.7 mi, respectively from Denver Intl. Travelers can rent a car at Denver Intl for an average daily rate of $44 to make sightseeing during their layover a little easier.

  • Where are the least popular layover locations for Portland to St. Louis flights?

    Of the flights from Portland to St. Louis that have layovers, the fewest flights stop in Salt Lake City.

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

    The amount of baggage you can bring on your Portland 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 Portland to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter Portland 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 Portland to St. Louis that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Portland 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 Portland to St. Louis that allow pets onboard?

    Many airlines flying from Portland 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 Portland to St. Louis?

    Yes, you can often find last-minute deals on Portland 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 Portland to St. Louis flight deals updated?

    The Portland to St. Louis flight deals you see on this page were last updated on 5/1.

See more FAQs

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

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Top 6 airlines flying from Portland to St. Louis

Discover the top 6 airlines that operate flights from Portland 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 2,899,487 searches. Data last updated May 1, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$107Average$218FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$151Average$204FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
Alaska AirlinesCheapest$286Average$461FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
American AirlinesCheapest$300Average$469FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$308Average$448FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$346Average$508FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
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