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Cheap flights from St. Louis (STL) to Washington, D.C. (WAS) from $48

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.
STL — WAS
May 8 — May 151
From?
To?
Wed 5/8
Wed 5/15
1 adult, Economy
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The best prices from Lambert-St Louis to Washington, D.C. are usually found in December or February, booked 48 days in advance, depart on a Wednesday or Friday and return on a Saturday

Cheap flight deals from St. Louis to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Washington, D.C. (WAS). 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 3, 2024.

Popular in

June

Cheapest in

December

Round-trip from

$234

One-way from

$94
High demand for flights, 14% potential price rise
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Best time to find cheap flights, 14% potential price drop
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From Lambert-St Louis to Washington, D.C. (WAS)
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One-way flight from Lambert-St Louis to Washington, D.C. (WAS)
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What is the cheapest day to fly round-trip from St. Louis to Washington, D.C.?

Flights from St. Louis to Washington, D.C. are found to be more expensive on Saturday. 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 Washington, D.C..

How far in advance should I book a flight from St. Louis to Washington, D.C.?

Travelers have found it’s best to book a flight 49 days in advance to save up to 220% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 49 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St. Louis to Washington, D.C. 1-2 weeks in advance for as low as $198, or $452 for flights within the next 24 hours.

What is the cheapest month to fly from St. Louis to Washington, D.C.?

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, December can be a great choice for travel to Washington, D.C.. Flights to Washington, D.C. from St. Louis in December are about $312 on average during December, but can be found for as low as $110.

When is the cheapest time to fly from St. Louis to Washington, D.C. (STL - WAS)?

It’s typically best to fly out from St. Louis to Washington, D.C. in the evening. Doing so could potentially save you 42% on the flight price compared to flying at noon, which is usually more expensive.

Cheap Delta flights from St. Louis to Washington, D.C.

Explore cheap flight options specifically provided by Delta for the route between St. Louis and Washington, D.C.. 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 3, 2024.
Take a look at some of the lowest-priced Delta flights heading from St. Louis to Washington, D.C.. Come back soon if you're not finding the exact deal you're looking for.
Wed 5/226:30 amSTL - IAD
1 stop3h 56mDelta
Tue 5/286:00 amIAD - STL
1 stop4h 19mDelta
Deal found 5/1$188
Wed 5/226:30 amSTL - IAD
1 stop3h 56mDelta
Mon 5/276:00 amIAD - STL
1 stop6h 48mDelta
Deal found 5/1$203
Sat 6/112:53 pmSTL - DCA
1 stop4h 21mDelta
Sat 6/86:00 amDCA - STL
1 stop4h 10mDelta
Deal found 5/2$208
Wed 5/226:30 amSTL - IAD
1 stop3h 56mDelta
Mon 5/276:00 amIAD - STL
1 stop6h 48mDelta
Deal found 5/1$218
Wed 5/87:00 amSTL - IAD
1 stop6h 09mDelta
Sat 5/111:24 pmIAD - STL
1 stop4h 12mDelta
Deal found 5/1$498
Tue 5/76:30 pmSTL - DCA
1 stop4h 27mDelta
Wed 5/812:55 pmDCA - STL
1 stop5h 27mDelta
Deal found 5/1$593

  • One of the most popular airlines traveling from St. Louis to Washington, D.C. is Delta. Flights from Delta traveling this route typically cost $350.20 RT. This price is typically 54% cheaper than other airlines that offer St. Louis to Washington, D.C. flights. When booking this route, the cheapest RT price found was $191. Lambert-St Louis Airport is the most common St. Louis airport to take off from when flying to Washington, D.C.. Washington, D.C. Dulles Intl Airport is the most popular arrival airport in Washington, D.C.. When flying from St. Louis to Washington, D.C., Delta flights are 4% more popular than any other airline flying that same route.

Cheap United Airlines flights from St. Louis to Washington, D.C.

Explore cheap flight options specifically provided by United Airlines for the route between St. Louis and Washington, D.C.. 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 3, 2024.
Take a gander at the lowest prices we've found on United Airlines flights from St. Louis to Washington, D.C.. Check back soon if you're not seeing flights that suit your needs.
Sat 5/255:31 pmSTL - IAD
1 stop6h 16mUnited Airlines
Sun 5/268:20 amIAD - STL
Nonstop2h 12mUnited Airlines
Deal found 5/2$263
Sat 8/105:30 pmSTL - IAD
1 stop6h 00mUnited Airlines
Sat 8/178:15 amIAD - STL
Nonstop2h 07mUnited Airlines
Deal found 5/2$298
Sat 6/158:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Sat 6/226:14 amIAD - STL
1 stop5h 43mUnited Airlines
Deal found 5/2$313
Sat 5/111:00 pmSTL - IAD
Nonstop2h 10mUnited Airlines
Sat 5/188:32 amIAD - STL
Nonstop2h 27mUnited Airlines
Deal found 5/2$385
Sat 5/113:15 pmSTL - IAD
1 stop4h 46mUnited Airlines
Sat 5/188:32 amIAD - STL
Nonstop2h 27mUnited Airlines
Deal found 5/2$394
Sat 10/58:25 amSTL - IAD
Nonstop2h 09mUnited Airlines
Tue 10/88:25 amIAD - STL
Nonstop2h 23mUnited Airlines
Deal found 5/1$405
Mon 9/98:25 amSTL - IAD
Nonstop2h 08mUnited Airlines
Tue 9/176:30 amIAD - STL
1 stop4h 37mUnited Airlines
Deal found 5/2$414
Wed 5/88:27 amSTL - IAD
Nonstop2h 10mUnited Airlines
Mon 5/278:20 amIAD - STL
Nonstop2h 12mUnited Airlines
Deal found 5/2$434
Wed 5/810:10 amSTL - IAD
1 stop5h 13mUnited Airlines
Mon 5/278:20 amIAD - STL
Nonstop2h 12mUnited Airlines
Deal found 5/2$443

  • If you’re traveling from St. Louis to Washington, D.C., one of the more common airlines traveling that route is United Airlines. Flights from United Airlines traveling this route typically cost $379.15 RT. This price is typically 69% more expensive than other airlines that offer St. Louis to Washington, D.C. flights. When booking this route, the cheapest RT price found was $197. The most popular departure airport in St. Louis when flying to Washington, D.C. is Lambert-St Louis Airport. The most popular airport to fly into when visiting Washington, D.C. is Washington, D.C. Dulles Intl Airport. When flying from St. Louis to Washington, D.C., United Airlines flights are 4% more popular than any other airline flying that same route.

Cheap St. Louis to Washington, D.C. flights in May & June 2024

Find cheap flight options from St. Louis to Washington, D.C. 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 3, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Washington, D.C. in 2024. For more flight deals, be sure to check back very soon.
Sat 6/19:29 pmSTL - BWI
1 stop9h 34mFrontier
Sat 6/88:15 pmBWI - STL
1 stop11h 52mFrontier
Deal found 5/2$138
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Sat 5/119:00 pmBWI - STL
1 stop11h 13mFrontier
Deal found 5/1$140
Thu 5/1611:06 pmSTL - BWI
1 stop11h 27mFrontier
Sat 5/258:41 pmBWI - STL
1 stop11h 27mFrontier
Deal found 5/2$142
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Thu 5/1610:00 pmBWI - STL
1 stop10h 08mFrontier
Deal found 5/1$143
Mon 6/39:20 pmSTL - BWI
1 stop10h 10mFrontier
Tue 6/118:48 pmBWI - STL
1 stop13h 41mFrontier
Deal found 5/2$145
Tue 5/147:16 pmSTL - BWI
1 stop18h 40mFrontier
Mon 5/208:38 amBWI - STL
1 stop23h 30mFrontier
Deal found 5/2$148
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Wed 5/158:50 pmBWI - STL
1 stop11h 18mFrontier
Deal found 5/1$149
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Tue 5/149:17 pmBWI - STL
1 stop20h 38mFrontier
Deal found 5/1$150
Tue 5/1410:34 amSTL - BWI
2 stops19h 36mSpirit Airlines
Mon 5/205:25 pmBWI - STL
2 stops17h 14mSpirit Airlines
Deal found 5/2$152

St. Louis to Washington, D.C. 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Washington, D.C. 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 3, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Washington, D.C. in 2024. For more flight deals, be sure to check back very soon.
Sat 6/19:29 pmSTL - BWI
1 stop9h 34mFrontier
Sat 6/88:15 pmBWI - STL
1 stop11h 52mFrontier
Deal found 5/2$138
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Sat 5/119:00 pmBWI - STL
1 stop11h 13mFrontier
Deal found 5/1$140
Thu 5/1611:06 pmSTL - BWI
1 stop11h 27mFrontier
Sat 5/258:41 pmBWI - STL
1 stop11h 27mFrontier
Deal found 5/2$142
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Thu 5/1610:00 pmBWI - STL
1 stop10h 08mFrontier
Deal found 5/1$143
Mon 6/39:20 pmSTL - BWI
1 stop10h 10mFrontier
Tue 6/118:48 pmBWI - STL
1 stop13h 41mFrontier
Deal found 5/2$145
Tue 5/147:16 pmSTL - BWI
1 stop18h 40mFrontier
Mon 5/208:38 amBWI - STL
1 stop23h 30mFrontier
Deal found 5/2$148
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Wed 5/158:50 pmBWI - STL
1 stop11h 18mFrontier
Deal found 5/1$149
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Tue 5/149:17 pmBWI - STL
1 stop20h 38mFrontier
Deal found 5/1$150
Tue 5/1410:34 amSTL - BWI
2 stops19h 36mSpirit Airlines
Mon 5/205:25 pmBWI - STL
2 stops17h 14mSpirit Airlines
Deal found 5/2$152

Non-stop flights to Washington, D.C. from St. Louis

Discover non-stop flight options from St. Louis to Washington, D.C.. 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 2,899,487 searches. Data last updated May 3, 2024.
To help reduce your travel time, choose from one of these non-stop flights from St. Louis to Washington, D.C.. Those looking to potentially save on 1 or 2-stop flights from St. Louis to Washington, D.C. should utilize the search form at the the top of the page.
Wed 6/56:09 amSTL - DCA
Nonstop2h 02mAmerican Airlines
Wed 6/193:26 pmDCA - STL
Nonstop2h 25mAmerican Airlines
Deal found 5/2$184
Mon 7/15:42 pmSTL - DCA
Nonstop2h 01mAmerican Airlines
Fri 7/58:00 pmDCA - STL
Nonstop2h 29mAmerican Airlines
Deal found 5/2$189
Sat 10/56:28 pmSTL - DCA
Nonstop2h 02mAmerican Airlines
Tue 10/87:45 pmDCA - STL
Nonstop2h 35mAmerican Airlines
Deal found 5/1$199
Wed 5/295:04 pmSTL - DCA
Nonstop1h 56mAmerican Airlines
Thu 5/307:44 amDCA - STL
Nonstop2h 24mAmerican Airlines
Deal found 5/2$204
Wed 5/225:04 pmSTL - DCA
Nonstop1h 56mAmerican Airlines
Tue 5/282:19 pmDCA - STL
Nonstop2h 16mAmerican Airlines
Deal found 5/1$209
Wed 5/226:16 amSTL - DCA
Nonstop1h 59mAmerican Airlines
Mon 5/277:44 amDCA - STL
Nonstop2h 24mAmerican Airlines
Deal found 5/1$213
Wed 6/196:09 amSTL - DCA
Nonstop2h 02mAmerican Airlines
Mon 6/248:00 pmDCA - STL
Nonstop2h 28mAmerican Airlines
Deal found 5/2$228
Wed 5/226:16 amSTL - DCA
Nonstop1h 59mAmerican Airlines
Wed 5/292:19 pmDCA - STL
Nonstop2h 16mAmerican Airlines
Deal found 5/2$230
Wed 5/158:27 amSTL - IAD
Nonstop2h 10mUnited Airlines
Wed 5/228:32 amIAD - STL
Nonstop2h 27mUnited Airlines
Deal found 5/1$230

St. Louis to Washington, D.C. flights leaving soon

Find last-minute flight options from St. Louis to Washington, D.C. 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 3, 2024.
Check out these flights departing soon from St. Louis to Washington, D.C.. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Sat 5/119:00 pmBWI - STL
1 stop11h 13mFrontier
Deal found 5/1$140
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Thu 5/1610:00 pmBWI - STL
1 stop10h 08mFrontier
Deal found 5/1$143
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Wed 5/158:50 pmBWI - STL
1 stop11h 18mFrontier
Deal found 5/1$149
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Tue 5/149:17 pmBWI - STL
1 stop20h 38mFrontier
Deal found 5/1$150
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Mon 5/131:00 pmBWI - STL
1 stop27h 50mFrontier
Deal found 5/1$158
Wed 5/88:04 pmSTL - DCA
1 stop14h 56mFrontier
Mon 5/136:51 pmDCA - STL
1 stop21h 59mFrontier
Deal found 5/1$173
Wed 5/89:53 pmSTL - BWI
1 stop21h 34mFrontier
Fri 5/108:50 pmBWI - STL
1 stop19h 47mFrontier
Deal found 5/1$178
Sat 5/115:15 pmSTL - BWI
1 stop6h 18mMultiple Airlines
Sat 5/182:37 pmBWI - STL
1 stop17h 31mMultiple Airlines
Deal found 5/2$188
Wed 5/88:04 pmSTL - DCA
1 stop14h 56mFrontier
Sat 5/1112:50 pmDCA - STL
1 stop26h 39mFrontier
Deal found 5/1$203

One-way flights to Washington, D.C. from St. Louis

Search for one-way flight options from St. Louis to Washington, D.C.. 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 3, 2024.
Users in need of a one-way flight from St. Louis to Washington, D.C. can choose from these deals. Users in need of a round-trip flight from St. Louis to Washington, D.C. instead should update the search form at the top of page.
Tue 5/2110:34 amSTL - BWI
1 stop6h 24mSpirit Airlines
Deal found 5/1$48
Tue 6/410:34 amSTL - BWI
1 stop12h 59mSpirit Airlines
Deal found 5/1$56
Tue 5/142:35 pmSTL - BWI
1 stop16h 40mSpirit Airlines
Deal found 5/1$69
Thu 5/167:30 pmSTL - BWI
1 stop27h 26mSpirit Airlines
Deal found 5/1$79
Thu 5/1611:06 pmSTL - BWI
1 stop11h 27mFrontier
Deal found 5/1$80
Wed 5/155:56 pmSTL - BWI
1 stop14h 04mFrontier
Deal found 5/1$81
Thu 6/67:44 pmSTL - BWI
1 stop11h 03mFrontier
Deal found 5/1$83
Wed 5/158:04 pmSTL - DCA
1 stop14h 59mFrontier
Deal found 5/2$85
Tue 5/144:50 pmSTL - BWI
2 stops21h 26mFrontier
Deal found 5/1$85

Find flights from St. Louis to Washington, D.C. within your budget

Customize your flight search to find flights from St. Louis to Washington, D.C. 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 3, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$138 - $263

Route

Depart

Return

Price

Lambert-St LouisBaltimore/Washington

STL - BWI

STLBWI

Lambert-St Louis

Sat 6/1

1 stop9h 34m

Baltimore/Washington

Sat 6/8

1 stop11h 52m

$138

Lambert-St LouisBaltimore/Washington

STL - BWI

STLBWI

Lambert-St Louis

Tue 5/21

1 stop7h 36m

Baltimore/Washington

Mon 5/27

1 stop12h 27m

$139

Lambert-St LouisBaltimore/Washington

STL - BWI

STLBWI

Lambert-St Louis

Thu 5/16

1 stop11h 27m

Baltimore/Washington

Sat 5/25

1 stop11h 27m

$142

Lambert-St LouisBaltimore/Washington

STL - BWI

STLBWI

Lambert-St Louis

Sat 6/1

1 stop9h 34m

Baltimore/Washington

Mon 6/3

1 stop12h 05m

$147

Lambert-St LouisBaltimore/Washington

STL - BWI

STLBWI

Lambert-St Louis

Tue 6/4

1 stop21h 01m

Baltimore/Washington

Fri 6/7

1 stop23h 47m

$150

Lambert-St LouisBaltimore/Washington

STL - BWI

STLBWI

Lambert-St Louis

Fri 5/31

1 stop11h 46m

Baltimore/Washington

Sun 6/2

1 stop9h 00m

$160

Lambert-St LouisWashington, D.C. Reagan-National

STL - DCA

STLDCA

Lambert-St Louis

Wed 5/22

1 stop4h 27m

Washington, D.C. Reagan-National

Tue 5/28

1 stop4h 19m

$188

Lambert-St LouisWashington, D.C. Reagan-National

STL - DCA

STLDCA

Lambert-St Louis

Mon 7/1

Nonstop2h 01m

Washington, D.C. Reagan-National

Fri 7/5

Nonstop2h 29m

$189

Lambert-St LouisWashington, D.C. Dulles Intl

STL - IAD

STLIAD

Lambert-St Louis

Sat 5/25

1 stop6h 16m

Washington, D.C. Dulles Intl

Sun 5/26

Nonstop2h 12m

$263

Flights are sorted by cheapest first

Deals found on 5/2

When is the best time to book a flight from St. Louis to Washington, D.C.?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Washington, D.C.. Price data was last updated on January 28, 2024.
Booking 48 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Washington, D.C.. 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 St. Louis to Washington, D.C.?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Washington, D.C.. Price data was last updated on April 28, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Washington, D.C. flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday at noon 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 Washington, D.C. by month

Plan your trip from St. Louis to Washington, D.C. by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Washington, D.C. is currently $74 while a round-trip flight costs $168. Price data was last updated on April 28, 2024.

Currently, September is the cheapest month in which you can book a flight from St. Louis to Washington, D.C. (average of $281). Flying from St. Louis to Washington, D.C. in June is currently the most expensive (average of $398). 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

$308

February

$303

March

$358

April

$337

May

$337

June

$398

July

$378

August

$296

September

$281

October

$303

November

$328

December

$291

Temperature and rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature and rainfall totals by month.

WAS

Temperature

35.6 - 80.6 °F

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated May 3, 2024.
Peruse reviews from past customers who have flown with Delta, United Airlines and American Airlines from St. Louis to Washington, D.C. to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,123 reviews
Check prices

Overall

8.1

Comfort

7.9

Boarding

8.2

Crew

8.6

Food

7.3

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
9,123 reviews
Alaska Airlines
8.1
Very good
9,123 reviews
Check prices

Overall

8.1

Comfort

7.9

Boarding

8.2

Crew

8.6

Food

7.3

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
10,858 reviews
Alaska Airlines
8.1
Very good
9,123 reviews
Check prices

Overall

8.1

Comfort

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Entertainment

7.3

Reviews

1 / 10

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

Qatar Airways
7.7
Good
4,450 reviews
Alaska Airlines
8.1
Very good
9,123 reviews
Check prices

Overall

8.1

Comfort

7.9

Boarding

8.2

Crew

8.6

Food

7.3

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
11,143 reviews
Alaska Airlines
8.1
Very good
9,123 reviews
Check prices

Overall

8.1

Comfort

7.9

Boarding

8.2

Crew

8.6

Food

7.3

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
14,767 reviews
Alaska Airlines
8.1
Very good
9,123 reviews
Check prices

Overall

8.1

Comfort

7.9

Boarding

8.2

Crew

8.6

Food

7.3

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 St. Louis to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Washington, D.C.?

    If you book a flight to Washington, D.C. from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 11 flights from Lambert-St Louis to Washington, D.C. per day from 5 different airlines.

  • Can I find flights from St. Louis to Washington, D.C. for under $200 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Washington, D.C. for under $200. The cheapest flight booked recently is on Frontier for just $138, but on average you can expect to pay $157.

  • Are there nonstop flights from St. Louis to Washington, D.C. for under $200 on Cheapflights?

    Cheapflights has at least 20 direct flights from St. Louis to Washington, D.C. under $200. A good price for a nonstop flight from St. Louis to Washington, D.C. is less than $241.

  • Are there last-minute flights available from St. Louis to Washington, D.C. for under $200?

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

  • What are the cheapest airlines flying from St. Louis to Washington, D.C. round-trip?

    Flying on Frontier is currently your cheapest option to Washington, D.C., with prices starting at $138. Additional round-trip tickets that might be worth considering are offered by Spirit Airlines and Delta, with the lowest prices starting at $139 and $188, respectively. Frontier is 55% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from St. Louis to Washington, D.C. one-way?

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $48. Users have also found prices from $80 and $94 on Frontier and Delta, respectively.

  • What are the most popular routes from St. Louis to Washington, D.C.?

    The most popular route from St. Louis to Washington, D.C. is Lambert-St Louis - Washington, D.C. Reagan-National. You may also consider Lambert-St Louis - Washington, D.C. Dulles Intl or Lambert-St Louis - Baltimore/Washington.

  • What are the most popular airlines that fly from St. Louis to Washington, D.C.?

    American Airlines, Delta and United Airlines are the most popular airlines when flying from St. Louis to Washington, D.C..

  • What are the most reliable airlines from St. Louis to Washington, D.C.?

    The top 3 most reliable airlines when flying from St. Louis to Washington, D.C. are Avianca (98%), Copa Airlines (98%) and GoJet (96%).

  • What are the cheapest flights from St. Louis to Washington, D.C.?

    While on average a flight from St. Louis to Washington, D.C. is generally $1,180, our data shows the cheapest flight currently is $137. When looking at the most popular route, (Lambert-St Louis - Washington, D.C. Reagan-National), you can expect to pay $182 for that flight.

  • What does STL to IAD mean?

    STL and IAD are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. STL to IAD refers to a flight route from Lambert-St Louis Airport to Washington, D.C. Dulles Intl Airport. Baltimore/Washington Airport (BWI), Washington, D.C. Reagan-National Airport (DCA) are some additional IATA codes for airports related to your trip.

  • Can I find deals for flights from St. Louis to Washington, D.C. that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Washington, D.C. 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 St. Louis to Washington, D.C. with specific airlines?

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

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

  • How can I find direct flights from St. Louis to Washington, D.C.?

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

  • Can I find deals for business class flights from St. Louis to Washington, D.C.?

    Yes. Cheapflights offers flight deals from St. Louis to Washington, D.C. 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 St. Louis to Washington, D.C. that allow pets onboard?

    Many airlines flying from St. Louis to Washington, D.C. 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 St. Louis to Washington, D.C.?

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

    The St. Louis to Washington, D.C. flight deals you see on this page were last updated on 5/2.

See more FAQs

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Alternative routes for St. Louis to Washington, D.C.
See prices for flight routes from nearby airports that may be better suited for you.

Kansas City to Dulles Intl flights
St. Louis to Reagan-National flights
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Top 5 airlines flying from St. Louis to Washington, D.C.

Discover the top 5 airlines that operate flights from St. Louis to Washington, D.C.. 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 3, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$102Average$201FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$140Average$224FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
DeltaCheapest$167Average$309FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$191Average$350FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$197Average$379FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
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Search flights from St. Louis to Washington, D.C. by cabin class

Find flights from St. Louis to Washington, D.C., based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from St. Louis to Washington, D.C.

Find hourly flight availability from St. Louis to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 3, 2024.
9%of flight departuresEarly morningMidnight to 6 am
42%of flight departuresMorning6 am to noon
39%of flight departuresAfternoonNoon to 6 pm
10%of flight departuresEvening6 pm to midnight
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Weekly flight availability from St. Louis to Washington, D.C.

Explore weekly flight availability from St. Louis to Washington, D.C.. 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 May 3, 2024.
Sunday10daily flights
Monday13daily flights
Tuesday12daily flights
Wednesday13daily flights
Thursday12daily flights
Friday13daily flights
Saturday10daily flights

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Need flexible booking options for your flight to Washington, D.C. from St. Louis? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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