Cheap flight from St. Louis to Washington D.C. from AED 237
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Flights from St. Louis to Washington D.C.
Cheap flight deals from St. Louis to Washington D.C.
We've found these cheap flights for you. You can book one-way or round-trip flight tickets.
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Round-trip
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One way
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Cheapest nonstop
STL 18:452hNonstopDCA 21:45St. Louis - Washington D.C. | Sat, May 24 | Southwest Airlines
DCA 18:452h 15mNonstopSTL 20:00Washington D.C. - St. Louis | Sun, May 25 | Southwest AirlinesAED 645 AED 87827% OFF27% OFFAED 878 AED 645 -
STL 16:011h 58mNonstopDCA 18:59St. Louis - Washington D.C. | Wed, May 28 | American Airlines
DCA 10:202h 32mNonstopSTL 11:52Washington D.C. - St. Louis | Sat, May 31 | American AirlinesAED 667 AED 87824% OFF24% OFFAED 878 AED 667 -
STL 15:471h 58mNonstopDCA 18:45St. Louis - Washington D.C. | Sat, May 24 | American Airlines
DCA 08:152h 27mNonstopSTL 09:42Washington D.C. - St. Louis | Sun, May 25 | American AirlinesAED 668 AED 87824% OFF24% OFFAED 878 AED 668
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STL 18:452hNonstopDCA 21:45St. Louis - Washington D.C. | Sat, May 31 | Southwest Airlines
DCA 07:0027h 12m1 stopsSTL 09:12Washington D.C. - St. Louis | Sun, Jun 1 | Frontier AirlinesAED 61130% OFFAED 878 AED 611
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STL 15:404h 28m1 stopsIAD 21:08St. Louis - Washington D.C. | Sat, May 24 | Delta Air Lines
DCA 06:004h 35m1 stopsSTL 09:35Washington D.C. - St. Louis | Sun, May 25 | Delta Air LinesAED 65425% OFFAED 878 AED 654 -
STL 13:096h 27m1 stopsDCA 20:36St. Louis - Washington D.C. | Tue, May 20 | Delta Air Lines
IAD 06:004h 35m1 stopsSTL 09:35Washington D.C. - St. Louis | Wed, May 21 | Delta Air LinesAED 65825% OFFAED 878 AED 658
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STL 19:064h 22m1 stopsIAD 00:28St. Louis - Washington D.C. | Mon, May 26 | Delta Air Lines
IAD 06:004h1 stopsSTL 09:00Washington D.C. - St. Louis | Thu, May 29 | Delta Air LinesAED 66824% OFFAED 878 AED 668
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STL 15:166h 43m1 stopsDCA 22:59St. Louis - Washington D.C. | Thu, Jul 3 | Delta Air Lines
DCA 17:294h 1m1 stopsSTL 20:30Washington D.C. - St. Louis | Sat, Jul 5 | Delta Air LinesAED 67523% OFFAED 878 AED 675
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STL 10:484h 45m1 stopsIAD 16:33St. Louis - Washington D.C. | Fri, Jun 13 | Delta Air Lines
DCA 19:355h 16m1 stopsSTL 23:51Washington D.C. - St. Louis | Mon, Jun 16 | Delta Air LinesAED 67623% OFFAED 878 AED 676
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STL 15:426h 3m1 stopsDCA 22:45St. Louis - Washington D.C. | Sat, Jun 21 | Delta Air Lines
IAD 10:075h 30m1 stopsSTL 14:37Washington D.C. - St. Louis | Tue, Jun 24 | Delta Air LinesAED 67623% OFFAED 878 AED 676
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STL 13:0017h 25m1 stopsWAS Invalid DateSt. Louis - Washington D.C. | Mon, May 12 | Normal Airline
WAS 15:006hNonstopSTL 16:00Washington D.C. - St. Louis | Wed, May 14 | Normal AirlineFind More FlightsFind More Flights
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Cheapest nonstop
STL 19:052hNonstopDCA 22:05St. Louis - Washington D.C. | Tue, Jun 3 | Southwest AirlinesAED 249 AED 1,18379% OFF79% OFFAED 1,183 AED 249
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STL 17:472h 1mNonstopDCA 20:48St. Louis - Washington D.C. | Wed, Jul 2 | American AirlinesAED 251 AED 1,18379% OFF79% OFFAED 1,183 AED 251
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STL 16:011h 58mNonstopDCA 18:59St. Louis - Washington D.C. | Tue, Jun 3 | American AirlinesAED 260 AED 1,18378% OFF78% OFFAED 1,183 AED 260
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STL 10:251h 59mNonstopDCA 13:24St. Louis - Washington D.C. | Fri, May 30 | American AirlinesAED 30275% OFFAED 1,183 AED 302
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STL 05:122h 3mNonstopDCA 08:15St. Louis - Washington D.C. | Sat, May 17 | American AirlinesAED 91123% OFFAED 1,183 AED 911
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STL 21:5531h 36m1 stopsIAD 06:31St. Louis - Washington D.C. | Mon, May 12 | Frontier AirlinesAED 23780% OFFAED 1,183 AED 237 -
STL 17:4721h 49m1 stopsIAD 16:36St. Louis - Washington D.C. | Sat, May 10 | Frontier AirlinesAED 31873% OFFAED 1,183 AED 318
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STL 15:424h 4m1 stopsDCA 20:46St. Louis - Washington D.C. | Wed, Jul 2 | Delta Air LinesAED 33372% OFFAED 1,183 AED 333
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STL 14:153h 44m1 stopsDCA 18:59St. Louis - Washington D.C. | Thu, May 29 | Delta Air LinesAED 33472% OFFAED 1,183 AED 334
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STL 07:006h 36m1 stopsIAD 14:36St. Louis - Washington D.C. | Tue, Jul 1 | Delta Air LinesAED 33572% OFFAED 1,183 AED 335
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STL 13:0017h 25m1 stopsWAS Invalid DateSt. Louis - Washington D.C. | Mon, May 12 | Normal AirlineFind More FlightsFind More Flights
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
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Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Frequently Asked Questions
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When are flight tickets from St. Louis (STL) to Washington D.C. (WAS) the cheapest?
Airlines adjust prices for flights from St. Louis to Washington D.C. based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays. -
How much do flights from St. Louis (STL) to Washington D.C. (WAS) cost?
According to Trip.com's data, the lowest price is around AED 1,372. -
How long does it take to fly from St. Louis (STL) to Washington D.C. (WAS)?
It takes about 2 hours 4 minutes to fly from St. Louis (STL) to Washington D.C. (WAS). -
What are the most popular airlines that fly from St. Louis (STL) to Washington D.C. (WAS)?
Airlines with flights from St. Louis (STL) to Washington D.C. (WAS): Brussels Airlines, Copa Airlines, Southwest Airlines, American Airlines, Lufthansa, United Airlines and avianca. -
How many airports are there in Washington D.C. (WAS)?
There are 2 airport(s) near Washington D.C. (WAS): Ronald Reagan Washington National Airport and Dulles International Airport.
How to find a cheap flight from St. Louis to Washington D.C.
Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Washington D.C.. Book your flights at the right time and save more.
Being flexible with your dates to get the cheapest St. Louis to Washington D.C. ticket.
Tap "Date" on flight search bar to scan through the calender for St. Louis to Washington D.C. airfare over next 6 months in 2025. If you would like to fly in next 3 months, it seems the cheapest date is on Tue, Jun 3 at AED 249 for one-way flights.
Compare cheap St. Louis to Washington D.C. flight deals from over hundreds of airlines.
Our extensive search allows you to compare prices from over 500 airlines to choose the cheapest flight tickets from St. Louis to Washington D.C.. The cheapest airline operating is Southwest Airlines.
Set up a Price Alert
By setting up a Price Alert for your St. Louis to Washington D.C. route, you can easily track the price of your airline tickets from without manually checking every day.
Don't miss cheap St. Louis to Washington D.C. flight deals and promo codes.
You can always get the latest deals through Trip.com Deals and Promo Codes for cheap flights. If registering a free membership, you can receive more deals for your flights.
Book early or wait unitl the last minute.
It's always better to book early. Flight tickets tend to be the cheapest when they are first released, normally about a year before the departure date. So, check online as soon as the flights you want become available. If you miss the cheapest time, you can still find lower-priced tickets as the flight date approaches.
Search for flights on the go.
To get the best flight booking experience on the go, download Trip.com and search for cheap flight tickets from St. Louis to Washington D.C. to get exclusive deals for you.
Flight Info | St. Louis to Washington D.C.
| Cheapest one-way flight price | AED 236 |
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| Cheapest return ticket price | AED 610 |
| Off-season for travel | March |
| Peak season for travel | June |
| Flight distance | 1,139.76 km |
| Average flight time | 2 hours 4 minutes |
| Popular airline | United Airlines |
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