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Cheap flights from St. Louis to Washington, D.C. from $60

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Washington, D.C. departing on 2/22. 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 St. Louis to Washington, D.C.

Cheap round-trip flights

These are some of the best round-trip flight deals from St. Louis to Washington, D.C. 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 St. Louis to Washington, D.C..

Cheap last minute flights

Planning a quick getaway from St. Louis to Washington, D.C.? 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 Washington, D.C., so you can enjoy a seamless trip without layovers.

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

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

All round-trip flight deals to Washington, D.C.

The cheapest plane tickets to Washington, D.C. found on KAYAK recently.
7:09 pm - 12:06 pmSTL-DCA
15h 57m1 stop
1:01 pm - 9:16 amDCA-STL
21h 15m1 stop
$118Frontier
Find Deal
Sat, Feb 1 - Tue, Feb 4
5:05 pm - 8:07 amSTL-BWI
14h 02m1 stop
8:31 pm - 11:27 pmBWI-STL
27h 56m1 stop
$118Frontier
Find Deal
Wed, Jan 8 - Sat, Jan 11
9:05 pm - 12:05 amSTL-BWI
2h 00mnonstop
10:00 pm - 11:25 pmBWI-STL
2h 25mnonstop
$196Southwest
Find Deal
Thu, Feb 13 - Sun, Feb 16
5:23 am - 1:01 pmSTL-BWI
6h 38m1 stop
8:23 am - 1:21 pmBWI-STL
5h 58m1 stop
$198American Airlines
Find Deal
Thu, Feb 6 - Mon, Feb 10
5:40 am - 11:17 amSTL-BWI
4h 37m1 stop
5:00 am - 9:03 amBWI-STL
5h 03m1 stop
$206American Airlines
Find Deal
Thu, Jan 16 - Sun, Jan 19
6:43 am - 11:41 amSTL-BWI
3h 58m1 stop
6:00 am - 9:36 amBWI-STL
4h 36m1 stop
$214Delta
Find Deal
Thu, Feb 13 - Sun, Feb 16
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
$229United Airlines
Find Deal
Sat, Feb 1 - Tue, Feb 4
3:55 pm - 6:55 pmSTL-DCA
2h 00mnonstop
8:00 am - 9:25 amDCA-STL
2h 25mnonstop
$230Southwest
Find Deal
Thu, Feb 13 - Sun, Feb 16
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
5:35 pm - 7:09 pmIAD-STL
2h 34mnonstop
$236United Airlines
Find Deal
Mon, Feb 10 - Wed, Feb 12
3:36 pm - 10:49 pmSTL-DCA
6h 13m1 stop
6:00 am - 9:36 amDCA-STL
4h 36m1 stop
$248Delta
Find Deal
Fri, Mar 21 - Thu, Mar 27
6:54 pm - 12:03 pmSTL-DCA
16h 09m1 stop
$60Frontier
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Sat, Feb 22
5:05 pm - 7:51 amSTL-BWI
13h 46m1 stop
$60Frontier
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Sat, Feb 8
9:05 pm - 12:05 amSTL-BWI
2h 00mnonstop
$98Southwest
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Thu, Feb 13
6:30 am - 11:46 amSTL-BWI
4h 16m1 stop
$99Delta
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Thu, Jan 23
7:07 pm - 12:35 amSTL-BWI
4h 28m1 stop
$107Delta
Find Deal
Mon, Feb 24
5:35 am - 8:40 amSTL-BWI
2h 05mnonstop
$109Southwest
Find Deal
Tue, Feb 18
6:00 am - 9:20 amSTL-DCA
2h 20mnonstop
$115American Airlines
Find Deal
Thu, Jan 23
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
$115United Airlines
Find Deal
Tue, Jan 21
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
$121United Airlines
Find Deal
Mon, Feb 10
6:24 pm - 9:30 pmSTL-DCA
2h 06mnonstop
$129American Airlines
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Mon, Mar 31
10:09 pm - 9:59 pmSTL-DCA
22h 50m1 stop
1:01 pm - 8:13 amDCA-STL
20h 12m1 stop
$508Frontier
Find Deal
Thu, Dec 26 - Thu, Jan 2
6:49 pm - 12:08 pmSTL-DCA
16h 19m1 stop
6:00 pm - 8:13 amDCA-STL
15h 13m1 stop
$541Frontier
Find Deal
Fri, Dec 27 - Fri, Jan 3
1:00 pm - 4:00 pmSTL-DCA
2h 00mnonstop
3:00 pm - 4:20 pmDCA-STL
2h 20mnonstop
$580Southwest
Find Deal
Fri, Dec 27 - Fri, Jan 3
4:00 pm - 6:55 pmSTL-DCA
1h 55mnonstop
4:00 pm - 7:55 pmDCA-STL
4h 55m1 stop
$585Southwest
Find Deal
Thu, Dec 26 - Thu, Jan 2
7:15 am - 2:21 pmSTL-DCA
6h 06m1 stop
5:45 pm - 11:40 pmDCA-STL
6h 55m1 stop
$598Delta
Find Deal
Thu, Dec 26 - Mon, Dec 30
5:55 pm - 11:02 pmSTL-IAD
4h 07m1 stop
6:57 pm - 11:40 pmIAD-STL
5h 43m1 stop
$598Delta
Find Deal
Fri, Dec 27 - Fri, Jan 3
6:15 am - 9:19 amSTL-DCA
2h 04mnonstop
8:15 am - 9:56 amDCA-STL
2h 41mnonstop
$614American Airlines
Find Deal
Thu, Dec 26 - Mon, Dec 30
2:27 pm - 9:36 pmSTL-DCA
6h 09m1 stop
8:15 am - 9:56 amDCA-STL
2h 41mnonstop
$624American Airlines
Find Deal
Thu, Dec 26 - Mon, Dec 30
5:30 pm - 11:59 pmSTL-IAD
5h 29m1 stop
8:30 am - 9:54 amIAD-STL
2h 24mnonstop
$624United Airlines
Find Deal
Thu, Dec 26 - Mon, Dec 30
8:25 am - 11:43 amSTL-IAD
2h 18mnonstop
8:30 am - 9:54 amIAD-STL
2h 24mnonstop
$705United Airlines
Find Deal
Thu, Dec 26 - Mon, Dec 30
9:05 pm - 12:05 amSTL-BWI
2h 00mnonstop
10:00 pm - 11:25 pmBWI-STL
2h 25mnonstop
$196Southwest
Find Deal
Thu, Feb 13 - Sun, Feb 16
6:04 am - 9:19 amSTL-DCA
2h 15mnonstop
4:12 pm - 5:45 pmDCA-STL
2h 33mnonstop
$229American Airlines
Find Deal
Thu, Feb 27 - Tue, Mar 4
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
$229United Airlines
Find Deal
Sat, Feb 1 - Tue, Feb 4
7:55 pm - 10:45 pmSTL-DCA
1h 50mnonstop
2:35 pm - 4:00 pmDCA-STL
2h 25mnonstop
$230Southwest
Find Deal
Thu, Feb 13 - Sun, Feb 16
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
5:35 pm - 7:09 pmIAD-STL
2h 34mnonstop
$236United Airlines
Find Deal
Mon, Feb 10 - Wed, Feb 12
6:00 am - 9:20 amSTL-DCA
2h 20mnonstop
8:37 am - 10:24 amDCA-STL
2h 47mnonstop
$247American Airlines
Find Deal
Thu, Jan 9 - Sun, Jan 12
6:04 am - 9:19 amSTL-DCA
2h 15mnonstop
9:14 pm - 10:44 pmDCA-STL
2h 30mnonstop
$249American Airlines
Find Deal
Sat, Feb 15 - Sun, Feb 23
6:10 am - 9:10 amSTL-BWI
2h 00mnonstop
7:35 am - 9:10 amBWI-STL
2h 35mnonstop
$258Southwest
Find Deal
Thu, Feb 27 - Tue, Mar 4
6:30 am - 9:29 amSTL-DCA
1h 59mnonstop
3:26 pm - 4:51 pmDCA-STL
2h 25mnonstop
$259American Airlines
Find Deal
Fri, May 30 - Fri, Jun 6
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
$262United Airlines
Find Deal
Mon, Jan 13 - Tue, Jan 14

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

Our best Frontier deals on St. Louis to Washington, D.C. flight tickets
Frontier
Jan 8
STL5:05 pmLambert-St Louis
14h 02m
1 stop
BWI8:07 amBaltimore/Washington
Jan 11
BWI8:31 pmBaltimore/Washington
27h 56m
1 stop
STL11:27 pmLambert-St Louis
Frontier
Jan 11
STL5:05 pmLambert-St Louis
13h 47m
1 stop
BWI7:52 amBaltimore/Washington
Jan 18
BWI8:31 pmBaltimore/Washington
11h 51m
1 stop
STL7:22 amLambert-St Louis
Frontier
Jan 6
STL7:43 amLambert-St Louis
24h 27m
1 stop
BWI9:10 amBaltimore/Washington
Jan 10
BWI9:20 pmBaltimore/Washington
27h 07m
1 stop
STL11:27 pmLambert-St Louis

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

Our best Delta deals on St. Louis to Washington, D.C. flight tickets
Delta
Feb 13
STL6:43 amLambert-St Louis
3h 58m
1 stop
BWI11:41 amBaltimore/Washington
Feb 16
BWI6:00 amBaltimore/Washington
4h 36m
1 stop
STL9:36 amLambert-St Louis
Delta
Feb 13
STL7:07 pmLambert-St Louis
4h 13m
1 stop
IAD12:20 amWashington, D.C. Dulles Intl
Feb 16
IAD6:00 amWashington, D.C. Dulles Intl
4h 36m
1 stop
STL9:36 amLambert-St Louis
Delta
Jan 9
STL6:30 amLambert-St Louis
4h 21m
1 stop
IAD11:51 amWashington, D.C. Dulles Intl
Jan 12
IAD6:00 amWashington, D.C. Dulles Intl
4h 36m
1 stop
STL9:36 amLambert-St Louis

See travel insights to Washington, D.C. from

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

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

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

The month of February is, on average, the cheapest month to fly to Washington, D.C. from St. Louis, with most prices found around $233. If you’re not able to fly to Washington, D.C. in February, then November is your next best option. Flight prices from St. Louis to Washington, D.C. during November average around $239.

What is the cheapest day to depart on your flight to Washington, D.C.?

On average, the least expensive day to fly to Washington, D.C. from St. Louis is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $237. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Washington, D.C. for around $325.

What is the cheapest time of day to depart on your flight to Washington, D.C.?

In the evening is the cheapest time of day to fly from St. Louis to Washington, D.C. when you can find flight prices for as low as $257. Flying to Washington, D.C. in the evening is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $304. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

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

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

The ideal time to book your flight to Washington, D.C. is 32 days in advance when prices tend to average $357. Don’t hesitate to check prices now though because momondo users recently found tickets for as low as $97.

What cabin class options are available on Lambert-St Louis to Washington, D.C. flights?

There are 4 cabin classes available to choose from on Lambert-St Louis to Washington, D.C. flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

You could potentially save up to 38% on your flight if you consider stops on a St. Louis to Washington, D.C. flight.

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

As of December 2024, prices for St. Louis to Washington, D.C. flights are approximately 18% more expensive when compared to flights at the same time last year.

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

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

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

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

Best Price Found

$60

Fastest flight time

1h 50m

Direct flights

Every day

Airports in Washington, D.C.

3 airports
The best one-way flight to Washington, D.C. from St. Louis in the past 72 hours is $60. The best round-trip flight deal from St. Louis to Washington, D.C. found on momondo in the last 72 hours is $118.
The fastest flight from St. Louis to Washington, D.C. takes 1h 50m
Direct flights go from St. Louis to Washington, D.C. every day.
There are 3 airports near Washington, D.C.: Washington, D.C. Reagan-National (DCA), Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD)

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

    A flight from Lambert-St Louis to Washington, D.C. will travel around 708.3 mi. By plane, this route typically takes 1h 50m.

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The travel and health documents required for your trip to Washington, D.C. can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C.. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

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


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

Compare and see reviews for airlines that fly from St. Louis to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $98Free CancellationRating
6.1
3,469 reviews
Search Frontier flights
American AirlinesPriceFrom $129Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $177Free CancellationRating
8.0
8,588 reviews
Search Delta flights
SouthwestPriceFrom $190Free CancellationRating
8.1
4,780 reviews
Search Southwest flights
United AirlinesPriceFrom $211Free CancellationRating
7.4
9,022 reviews
Search United Airlines flights
  • Southwest Flights From St. Louis to Washington, D.C.

    Southwest operates around 28 flights from St. Louis to Washington, D.C. every week. The average price of these flights found in the last 72 hours has been $339, but momondo users have found Southwest deals from St. Louis to Washington, D.C. from as low as $190 round-trip. Southwest has been scored 8.1/10 in 4,780 reviews.

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

    The best United Airlines deal for St. Louis to Washington, D.C. flight tickets found on momondo in the last 72 hours was $211, round-trip. It should be noted that an average United Airlines flight deal for this route in this time was higher, at $368 round-trip. United Airlines operates 14 flights out of St. Louis into Washington, D.C. in an average week, so prices vary by time and availability. 9,022 United Airlines reviews by users on momondo have scored the airline at 7.4/10.


Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Washington, D.C.. momondo saves you time and could save you money on your trip.

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

Yes. All flights to Washington, D.C. from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Washington, D.C. from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of St. Louis to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.


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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.