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Cheap flights from Washington, D.C. to St. Louis from $53

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to St. Louis departing on 12/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. to St. Louis

Cheap round-trip flights

These are some of the best round-trip flight deals from Washington, D.C. to St. Louis that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Washington, D.C. to St. Louis.

Cheap last minute flights

Planning a quick getaway from Washington, D.C. to St. Louis? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to St. Louis, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Washington, D.C. to St. Louis

Find recent round-trip train or bus tickets from Washington, D.C. to St. Louis.

All round-trip flight deals to St. Louis

The cheapest plane tickets to St. Louis found on KAYAK recently.
1:01 pm - 9:16 amDCA-STL
21h 15m1 stop
7:09 pm - 9:59 pmSTL-DCA
25h 50m1 stop
$118Frontier
Find Deal
Tue, Jan 28 - Wed, Jan 29
9:15 am - 11:24 pmBWI-STL
15h 09m1 stop
5:02 pm - 9:10 amSTL-BWI
15h 08m1 stop
$128Frontier
Find Deal
Sun, Dec 8 - Tue, Dec 10
6:00 am - 9:35 amBWI-STL
4h 35m1 stop
6:00 am - 1:04 pmSTL-BWI
6h 04m1 stop
$216Delta
Find Deal
Wed, Dec 11 - Mon, Dec 16
3:00 pm - 4:30 pmDCA-STL
2h 30mnonstop
7:15 pm - 10:05 pmSTL-DCA
1h 50mnonstop
$225Southwest
Find Deal
Tue, Jan 7 - Tue, Jan 7
6:00 am - 9:35 amBWI-STL
4h 35m1 stop
6:30 am - 11:44 amSTL-BWI
4h 14m1 stop
$226Delta
Find Deal
Wed, Dec 11 - Mon, Dec 16
7:44 am - 9:21 amDCA-STL
2h 37mnonstop
6:15 am - 9:19 amSTL-DCA
2h 04mnonstop
$229American Airlines
Find Deal
Tue, Dec 10 - Thu, Dec 19
8:30 am - 9:54 amIAD-STL
2h 24mnonstop
8:25 am - 11:43 amSTL-IAD
2h 18mnonstop
$229United Airlines
Find Deal
Wed, Dec 25 - Fri, Jan 3
8:00 am - 9:20 amDCA-STL
2h 20mnonstop
8:05 am - 11:00 amSTL-DCA
1h 55mnonstop
$230Southwest
Find Deal
Sun, Dec 29 - Fri, Jan 3
8:20 am - 12:19 pmIAD-STL
4h 59m1 stop
1:05 pm - 4:13 pmSTL-IAD
2h 08mnonstop
$239United Airlines
Find Deal
Tue, Dec 17 - Tue, Dec 24
7:44 am - 9:21 amDCA-STL
2h 37mnonstop
6:10 am - 9:18 amSTL-DCA
2h 08mnonstop
$253American Airlines
Find Deal
Fri, Dec 13 - Mon, Dec 16
5:57 pm - 11:24 pmIAD-STL
6h 27m1 stop
$53Frontier
Find Deal
Mon, Dec 9
5:57 pm - 11:24 pmIAD-STL
6h 27m1 stop
$54Frontier
Find Deal
Mon, Dec 9
2:01 pm - 6:45 pmBWI-STL
5h 44m1 stop
$108Delta
Find Deal
Wed, Jan 8
6:55 pm - 8:20 pmDCA-STL
2h 25mnonstop
$115Southwest
Find Deal
Fri, Feb 28
8:30 am - 9:54 amIAD-STL
2h 24mnonstop
$115United Airlines
Find Deal
Wed, Dec 25
10:01 am - 4:12 pmBWI-STL
7h 11m1 stop
$118Delta
Find Deal
Thu, Dec 19
10:52 am - 2:24 pmBWI-STL
4h 32m1 stop
$126United Airlines
Find Deal
Tue, Dec 24
6:19 pm - 7:57 pmDCA-STL
2h 38mnonstop
$139American Airlines
Find Deal
Sat, Jan 25
7:35 am - 9:10 amBWI-STL
2h 35mnonstop
$139Southwest
Find Deal
Wed, Jan 8
5:00 am - 8:50 amIAD-STL
4h 50m1 stop
$148American Airlines
Find Deal
Thu, Dec 26
8:38 pm - 6:40 amBWI-STL
11h 02m1 stop
4:27 pm - 5:30 pmSTL-BWI
24h 03m1 stop
Sat, Nov 23 - Tue, Dec 24
8:38 pm - 6:40 amBWI-STL
11h 02m1 stop
1:34 pm - 1:21 pmSTL-BWI
22h 47m1 stop
$269Frontier
Find Deal
Sat, Nov 23 - Sun, Nov 24
7:45 am - 9:15 amDCA-STL
2h 30mnonstop
6:15 am - 9:19 amSTL-DCA
2h 04mnonstop
$469American Airlines
Find Deal
Sat, Nov 23 - Tue, Dec 24
6:39 pm - 8:05 pmIAD-STL
2h 26mnonstop
8:25 am - 11:43 amSTL-IAD
2h 18mnonstop
$469United Airlines
Find Deal
Sat, Nov 23 - Tue, Dec 24
6:30 am - 12:09 pmDCA-STL
6h 39m1 stop
6:15 am - 9:19 amSTL-DCA
2h 04mnonstop
$479American Airlines
Find Deal
Sat, Nov 23 - Tue, Dec 24
6:39 pm - 8:05 pmIAD-STL
2h 26mnonstop
5:33 pm - 11:59 pmSTL-IAD
5h 26m1 stop
$479United Airlines
Find Deal
Sat, Nov 23 - Tue, Dec 24
1:33 pm - 4:33 pmIAD-STL
4h 00m1 stop
5:55 pm - 11:02 pmSTL-IAD
4h 07m1 stop
$488Delta
Find Deal
Sat, Nov 23 - Tue, Dec 24
4:10 pm - 8:32 pmDCA-STL
5h 22m1 stop
5:55 pm - 10:57 pmSTL-DCA
4h 02m1 stop
$488Delta
Find Deal
Sat, Nov 23 - Tue, Dec 24
8:15 am - 9:50 amDCA-STL
2h 35mnonstop
8:05 am - 11:00 amSTL-DCA
1h 55mnonstop
$580Southwest
Find Deal
Mon, Nov 25 - Thu, Nov 28
3:00 pm - 8:35 pmDCA-STL
6h 35m1 stop
3:00 pm - 6:00 pmSTL-DCA
2h 00mnonstop
$589Southwest
Find Deal
Mon, Nov 25 - Thu, Nov 28
3:00 pm - 4:30 pmDCA-STL
2h 30mnonstop
7:15 pm - 10:05 pmSTL-DCA
1h 50mnonstop
$225Southwest
Find Deal
Tue, Jan 7 - Tue, Jan 7
8:30 am - 9:54 amIAD-STL
2h 24mnonstop
8:25 am - 11:43 amSTL-IAD
2h 18mnonstop
$229United Airlines
Find Deal
Wed, Dec 25 - Fri, Jan 3
7:44 am - 9:21 amDCA-STL
2h 37mnonstop
6:15 am - 9:19 amSTL-DCA
2h 04mnonstop
$229American Airlines
Find Deal
Tue, Dec 10 - Thu, Dec 19
8:00 am - 9:20 amDCA-STL
2h 20mnonstop
8:05 am - 11:00 amSTL-DCA
1h 55mnonstop
$230Southwest
Find Deal
Sun, Dec 29 - Fri, Jan 3
6:45 am - 8:20 amDCA-STL
2h 35mnonstop
6:28 am - 9:29 amSTL-DCA
2h 01mnonstop
$249American Airlines
Find Deal
Sat, Apr 12 - Sat, Apr 19
7:44 am - 9:21 amDCA-STL
2h 37mnonstop
6:10 am - 9:18 amSTL-DCA
2h 08mnonstop
$253American Airlines
Find Deal
Fri, Dec 13 - Mon, Dec 16
8:50 am - 10:16 amIAD-STL
2h 26mnonstop
1:05 pm - 4:13 pmSTL-IAD
2h 08mnonstop
$253United Airlines
Find Deal
Tue, Dec 17 - Tue, Dec 24
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
$264United Airlines
Find Deal
Fri, Jan 10 - Sat, Jan 11
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
12:55 pm - 4:03 pmSTL-IAD
2h 08mnonstop
$265United Airlines
Find Deal
Sun, Jan 12 - Wed, Jan 15
6:45 am - 8:20 amDCA-STL
2h 35mnonstop
6:28 pm - 9:30 pmSTL-DCA
2h 02mnonstop
$269American Airlines
Find Deal
Sun, Mar 30 - Wed, Apr 2

Frontier flights from Washington, D.C. to St. Louis

Our best Frontier deals on Washington, D.C. to St. Louis flight tickets
Frontier
Jan 28
DCA1:01 pmWashington, D.C. Reagan-National
21h 15m
1 stop
STL9:16 amLambert-St Louis
Jan 29
STL7:09 pmLambert-St Louis
25h 50m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
Frontier
Dec 8
BWI9:15 amBaltimore/Washington
15h 09m
1 stop
STL11:24 pmLambert-St Louis
Dec 10
STL5:02 pmLambert-St Louis
15h 08m
1 stop
BWI9:10 amBaltimore/Washington
Frontier
Dec 12
DCA7:00 amWashington, D.C. Reagan-National
26h 13m
1 stop
STL8:13 amLambert-St Louis
Dec 16
STL6:46 pmLambert-St Louis
16h 22m
1 stop
DCA12:08 pmWashington, D.C. Reagan-National

Southwest flights from Washington, D.C. to St. Louis

Our best Southwest deals on Washington, D.C. to St. Louis flight tickets
Southwest
Jan 7
DCA3:00 pmWashington, D.C. Reagan-National
2h 30m
STL4:30 pmLambert-St Louis
Jan 7
STL7:15 pmLambert-St Louis
1h 50m
DCA10:05 pmWashington, D.C. Reagan-National
Southwest
Dec 29
DCA8:00 amWashington, D.C. Reagan-National
2h 20m
STL9:20 amLambert-St Louis
Jan 3
STL8:05 amLambert-St Louis
1h 55m
DCA11:00 amWashington, D.C. Reagan-National
Southwest
Jan 31
DCA5:15 pmWashington, D.C. Reagan-National
5h 55m
1 stop
STL10:10 pmLambert-St Louis
Feb 2
STL1:05 pmLambert-St Louis
1h 55m
DCA4:00 pmWashington, D.C. Reagan-National

See travel insights to St. Louis from

How to get the cheapest flight ticket from Washington, D.C. to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

January. The cheapest time of year to fly to St. Louis from Washington, D.C. is January. Most expensive is March

What is the cheapest day to depart Washington, D.C. for St. Louis?

Saturday. The cheapest day of the week is typically Saturday. The most expensive is typically Sunday

When is the cheapest time to fly from Washington, D.C. to St. Louis?

In the evening. Washington, D.C. to St. Louis flights are approximately 16% more expensive in the morning than in the evening

What is the cheapest Washington, D.C. to St. Louis flight route?

Baltimore/Washington - Lambert-St Louis. Fly from Baltimore/Washington to Lambert-St Louis for the best Washington, D.C. - St. Louis flight prices

How far in advance should you book Washington, D.C. to St. Louis flights?

44 days before. The cheapest time to buy a flight from Washington, D.C. to St. Louis is approximately 44 days to departure

Can stopping save me money on Washington, D.C. to St. Louis flights?

You could potentially save up to 53% on your flight if you consider stops on a Washington, D.C. to St. Louis flight.

How have Washington, D.C. to St. Louis flight prices changed over time?

As of November 2024, prices for Washington, D.C. to St. Louis flights are approximately 40% cheaper when compared to flights at the same time last year.

What is the typical price of a round-trip flight between Washington, D.C. and St. Louis?


When to book flights from Washington, D.C. to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. to St. Louis (WAS to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to St. Louis

Best Price Found

$53

Fastest flight time

2h 15m

Direct flights

Mon, Tue, Thu, Fri, Sat and Sun

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Washington, D.C. in the past 72 hours is $53. The best round-trip flight deal from Washington, D.C. to St. Louis found on momondo in the last 72 hours is $118.
The fastest flight from Washington, D.C. to St. Louis takes 2h 15m
Direct flights go from Washington, D.C. to St. Louis on Monday, Tuesday, Thursday, Friday, Saturday and Sunday. Airlines offering direct flights are: United Airlines and Southwest.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

  • How far is Washington, D.C. to Lambert-St Louis by plane?

    There are 708.3 mi between Washington, D.C. and Lambert-St Louis. 2h 15m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Washington, D.C. to Lambert-St Louis Airport?

    Prices for flights from Washington, D.C. to Lambert-St Louis Airport are updated daily.

  • How many operators does momondo search for flights from Washington, D.C. to Lambert-St Louis Airport?

  • How old do you have to be to fly from Washington, D.C. to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Washington, D.C. to St. Louis?

  • What is the most popular airline from Washington, D.C. to St. Louis?


Best airlines flying from Washington, D.C. to St. Louis

Compare and see reviews for airlines that fly from Washington, D.C. to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $98Free CancellationRating
6.1
3,539 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $133Free CancellationRating
6.3
8,174 reviews
Search Spirit Airlines flights
United AirlinesPriceFrom $158Free CancellationRating
7.4
9,171 reviews
Search United Airlines flights
DeltaPriceFrom $175Free CancellationRating
8.0
8,756 reviews
Search Delta flights
American AirlinesPriceFrom $183Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $215Free CancellationRating
8.1
5,014 reviews
Search Southwest flights
  • Southwest Flights From Washington, D.C. to St. Louis

    Southwest operates around 25 flights from Washington, D.C. to St. Louis every week. The average price of these flights found in the last 72 hours has been $363, but momondo users have found Southwest deals from Washington, D.C. to St. Louis from as low as $215 round-trip. Southwest has been scored 8.1/10 in 5,014 reviews.

  • United Airlines Flights From Washington, D.C. to St. Louis

    United Airlines (7.4/10 from 9,171 reviews) operates around 14 flights from Washington, D.C. to St. Louis in any given week. The average United Airlines airfare for this route is around $438, with deals from around $158 rare but found on momondo. Referenced prices are for round-trip Washington, D.C. to St. Louis flight searches in the last 72 hours.


Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to St. Louis?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to St. Louis from Washington, D.C..

Can I find flights from Washington, D.C. to St. Louis with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington, D.C. to St. Louis flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington, D.C. to St. Louis?

momondo helps you find the best flight between Washington, D.C. and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington, D.C. to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Washington, D.C. and alert you when they change.


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