What airlines fly to Washington, D.C.?

Southwest, American Airlines and United Airlines are the top three most popular airlines that fly to Washington, D.C. from St. Louis according to our data. Southwest is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 5 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

How many flights depart from St. Louis to Washington, D.C. on average per week?

The number of flights available between St. Louis and Washington, D.C. is 82 per week as of September 2026. The most frequent departure day is Wed, with 22% of weekly flights leaving on this day.

What is the cheapest airline that flies from Lambert-St Louis to Washington, D.C.?

Southwest, Delta, and American Airlines are the most popular carriers operating from Lambert-St Louis to Washington, D.C.

How many flights depart from St. Louis to Washington, D.C. on average per day?

The number of flights available between St. Louis and Washington, D.C. is 11 per day as of September 2026. The most frequent departure time is 8:00AM, with 49% of daily flights leaving at noon.

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.?

The number of operators available for flights from Lambert-St Louis Airport to Washington, D.C. is 5 as of September 2026.

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.

$58 Cheap Flights from St. Louis to Washington, D.C. in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Washington, D.C.

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:29 pm - 9:58 pmSTL Lambert-St Louis-BWI Baltimore/Washington

6h 29m1 stop Atlanta Hartsfield-Jackson

10:22 am - 5:40 pmBWI Baltimore/Washington-STL Lambert-St Louis

8h 18m1 stop Atlanta Hartsfield-Jackson

$117Frontier

Wed, Oct 7 - Wed, Oct 14

2:29 pm - 9:25 amSTL Lambert-St Louis-BWI Baltimore/Washington

17h 56m1 stop Atlanta Hartsfield-Jackson

6:38 am - 1:10 pmBWI Baltimore/Washington-STL Lambert-St Louis

7h 32m1 stop Atlanta Hartsfield-Jackson

$122Frontier

Mon, Oct 5 - Wed, Oct 7

4:20 pm - 10:55 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

5h 35m1 stop Atlanta Hartsfield-Jackson

7:55 am - 12:15 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

5h 20m1 stop Chicago Midway

$237Southwest

Thu, Oct 8 - Thu, Oct 15

6:10 pm - 11:35 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

4h 25m1 stop Chicago Midway

5:05 pm - 7:55 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

3h 50m1 stop Nashville Intl

$237Southwest

Thu, Oct 15 - Mon, Oct 19

3:11 pm - 9:11 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

5h 00m1 stop Chicago O'Hare Intl

8:20 am - 12:13 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 53m1 stop Chicago O'Hare Intl

$237United Airlines

Mon, Oct 5 - Wed, Oct 7

5:00 am - 11:52 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

5h 52m1 stop Chicago O'Hare Intl

8:23 am - 12:12 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 49m1 stop Chicago O'Hare Intl

$237United Airlines

Thu, Oct 29 - Sat, Oct 31

2:25 pm - 8:14 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 49m1 stop Atlanta Hartsfield-Jackson

5:13 pm - 8:51 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 38m1 stop Detroit Metropolitan Wayne County

$237Delta

Sat, Oct 10 - Tue, Oct 13

12:36 pm - 6:42 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

5h 06m1 stop Atlanta Hartsfield-Jackson

8:07 am - 1:28 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

6h 21m1 stop Atlanta Hartsfield-Jackson

$237Delta

Mon, Dec 14 - Wed, Dec 16

5:08 pm - 8:18 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 10mnonstop

6:55 pm - 8:32 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 37mnonstop

$246American Airlines

Tue, Oct 6 - Fri, Oct 9

6:00 am - 9:19 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 19mnonstop

2:25 pm - 3:57 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 32mnonstop

$246American Airlines

Fri, Oct 2 - Mon, Oct 5

Cheap last minute flights

Enter your travel dates to find the best prices.

2:29 pm - 12:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

8h 41m1 stop Atlanta Hartsfield-Jackson

7:50 am - 1:10 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

6h 20m1 stop Atlanta Hartsfield-Jackson

$261Frontier

Wed, Sep 16 - Wed, Sep 23

2:29 pm - 9:30 pmSTL Lambert-St Louis-BWI Baltimore/Washington

6h 01m1 stop Atlanta Hartsfield-Jackson

6:38 am - 1:10 pmBWI Baltimore/Washington-STL Lambert-St Louis

7h 32m1 stop Atlanta Hartsfield-Jackson

$261Frontier

Wed, Sep 16 - Wed, Sep 23

1:54 pm - 7:33 pmSTL Lambert-St Louis-BWI Baltimore/Washington

4h 39m1 stop Charlotte Douglas

7:09 pm - 10:42 pmBWI Baltimore/Washington-STL Lambert-St Louis

4h 33m1 stop Charlotte Douglas

$437American Airlines

Sat, Sep 12 - Mon, Sep 14

1:54 pm - 6:59 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 05m1 stop Charlotte Douglas

7:57 am - 1:03 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

6h 06m1 stop Charlotte Douglas

$445American Airlines

Mon, Sep 14 - Wed, Sep 16

8:25 am - 11:25 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 00mnonstop

11:45 am - 7:50 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

9h 05m1 stop Tampa

$495Southwest

Wed, Sep 16 - Sat, Sep 19

10:45 am - 3:45 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

4h 00m1 stop Chicago Midway

12:30 pm - 1:40 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 10mnonstop

$495Southwest

Wed, Sep 16 - Sat, Sep 19

8:40 am - 11:54 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 14mnonstop

5:15 pm - 9:38 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

5h 23m1 stop Chicago O'Hare Intl

$495United Airlines

Wed, Sep 16 - Wed, Sep 23

8:40 am - 11:54 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 14mnonstop

8:25 am - 9:39 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 14mnonstop

$498United Airlines

Wed, Sep 16 - Wed, Sep 23

6:54 pm - 12:41 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 47m1 stop Atlanta Hartsfield-Jackson

8:08 am - 1:23 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

6h 15m1 stop Atlanta Hartsfield-Jackson

$513Delta

Mon, Sep 14 - Wed, Sep 16

10:29 am - 4:30 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

5h 01m1 stop Detroit Metropolitan Wayne County

10:15 am - 3:54 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

6h 39m1 stop Atlanta Hartsfield-Jackson

$554Delta

Mon, Sep 14 - Wed, Sep 16

Cheap direct flights

Enter your travel dates to find the best prices.

5:08 pm - 8:18 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 10mnonstop

6:55 pm - 8:32 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 37mnonstop

$246American Airlines

Tue, Oct 6 - Fri, Oct 9

6:00 am - 9:19 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 19mnonstop

2:25 pm - 3:57 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 32mnonstop

$246American Airlines

Fri, Oct 2 - Mon, Oct 5

3:55 pm - 6:55 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 00mnonstop

8:00 am - 9:25 amDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 25mnonstop

$246Southwest

Fri, Oct 2 - Tue, Oct 6

7:50 pm - 10:50 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 00mnonstop

6:50 pm - 8:15 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 25mnonstop

$246Southwest

Fri, Oct 2 - Mon, Oct 5

3:55 pm - 6:55 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 00mnonstop

6:50 pm - 8:15 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 25mnonstop

$246Southwest

Fri, Oct 16 - Mon, Oct 19

5:08 pm - 8:18 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 10mnonstop

8:26 am - 10:18 amDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 52mnonstop

$246American Airlines

Fri, Oct 9 - Mon, Oct 19

6:00 am - 9:19 amSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 19mnonstop

2:25 pm - 3:57 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 32mnonstop

$246American Airlines

Fri, Oct 2 - Tue, Oct 6

8:30 am - 11:46 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 16mnonstop

5:55 pm - 7:21 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 26mnonstop

$277United Airlines

Tue, Oct 6 - Sat, Oct 10

8:00 am - 11:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 10mnonstop

8:40 am - 10:12 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 32mnonstop

$292United Airlines

Mon, Nov 23 - Thu, Nov 26

1:00 pm - 4:09 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 09mnonstop

8:30 am - 9:58 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 28mnonstop

$296United Airlines

Sat, Nov 14 - Wed, Dec 2

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American Airlines flights from St. Louis to Washington, D.C.

Our best American Airlines deals on St. Louis to Washington, D.C. flight tickets

American Airlines

Oct 10

STL7:03 amLambert-St Louis

2h 12m

DCA10:15 amWashington, D.C. Reagan-National

Oct 12

DCA2:25 pmWashington, D.C. Reagan-National

2h 32m

STL3:57 pmLambert-St Louis

$255

American Airlines

Oct 10

STL9:27 amLambert-St Louis

5h 43m

1 stop

DCA4:10 pmWashington, D.C. Reagan-National

Oct 13

DCA11:10 amWashington, D.C. Reagan-National

2h 36m

STL12:46 pmLambert-St Louis

$265

American Airlines

Nov 19

STL5:00 amLambert-St Louis

5h 49m

1 stop

DCA11:49 amWashington, D.C. Reagan-National

Dec 3

DCA3:55 pmWashington, D.C. Reagan-National

4h 27m

1 stop

STL7:22 pmLambert-St Louis

$275

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

Our best Frontier deals on St. Louis to Washington, D.C. flight tickets

Frontier

Oct 7

STL2:29 pmLambert-St Louis

6h 29m

1 stop

BWI9:58 pmBaltimore/Washington

Oct 14

BWI10:22 amBaltimore/Washington

8h 18m

1 stop

STL5:40 pmLambert-St Louis

$117

Frontier

Oct 5

STL2:29 pmLambert-St Louis

17h 56m

1 stop

BWI9:25 amBaltimore/Washington

Oct 7

BWI6:38 amBaltimore/Washington

7h 32m

1 stop

STL1:10 pmLambert-St Louis

$122

Frontier

Oct 7

STL2:29 pmLambert-St Louis

6h 29m

1 stop

BWI9:58 pmBaltimore/Washington

Oct 13

BWI9:12 pmBaltimore/Washington

21h 28m

1 stop

STL5:40 pmLambert-St Louis

$128

momondo Fare Finder

Use the filters below to find and compare flights from St. Louis to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBaltimore

STL Lambert-St Louis - BWI Baltimore/Washington

STLBWI

Lambert-St Louis

Wed 10/7

2:29 pm-9:58 pm

1 stop6h 29m

Baltimore/Washington

Wed 10/14

10:22 am-5:40 pm

1 stop8h 18m

$117

St. LouisBaltimore

STL Lambert-St Louis - BWI Baltimore/Washington

STLBWI

Lambert-St Louis

Mon 10/5

2:29 pm-9:25 am

1 stop17h 56m

Baltimore/Washington

Wed 10/7

6:38 am-1:10 pm

1 stop7h 32m

$122

St. LouisWashington, D.C.

STL Lambert-St Louis - DCA Washington, D.C. Reagan-National

STLDCA

Lambert-St Louis

Thu 10/8

4:20 pm-10:55 pm

1 stop5h 35m

Washington, D.C. Reagan-National

Thu 10/15

7:55 am-12:15 pm

1 stop5h 20m

$237

St. LouisWashington, D.C.

STL Lambert-St Louis - DCA Washington, D.C. Reagan-National

STLDCA

Lambert-St Louis

Thu 10/15

6:10 pm-11:35 pm

1 stop4h 25m

Washington, D.C. Reagan-National

Mon 10/19

5:05 pm-7:55 pm

1 stop3h 50m

$237

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Mon 10/5

3:11 pm-9:11 pm

1 stop5h 00m

Washington, D.C. Dulles Intl

Wed 10/7

8:20 am-12:13 pm

1 stop4h 53m

$237

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Thu 10/29

5:00 am-11:52 am

1 stop5h 52m

Washington, D.C. Dulles Intl

Sat 10/31

8:23 am-12:12 pm

1 stop4h 49m

$237

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Sat 10/10

2:25 pm-8:14 pm

1 stop4h 49m

Washington, D.C. Dulles Intl

Tue 10/13

5:13 pm-8:51 pm

1 stop4h 38m

$237

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Mon 12/14

12:36 pm-6:42 pm

1 stop5h 06m

Washington, D.C. Dulles Intl

Wed 12/16

8:07 am-1:28 pm

1 stop6h 21m

$237

Quickest round-trip

St. LouisWashington, D.C.

STL Lambert-St Louis - DCA Washington, D.C. Reagan-National

STLDCA

Lambert-St Louis

Tue 10/6

5:08 pm-8:18 pm

Nonstop2h 10m

Washington, D.C. Reagan-National

Fri 10/9

6:55 pm-8:32 pm

Nonstop2h 37m

$246

St. LouisWashington, D.C.

STL Lambert-St Louis - DCA Washington, D.C. Reagan-National

STLDCA

Lambert-St Louis

Fri 10/2

6:00 am-9:19 am

Nonstop2h 19m

Washington, D.C. Reagan-National

Mon 10/5

2:25 pm-3:57 pm

Nonstop2h 32m

$246

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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

Prices are currently low for flights on this route.

Typical prices usually range from $237 to $427.
The lowest price recently found on this route was $117.

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

The month of October is, on average, the cheapest month to fly to Washington, D.C. from St. Louis, with most prices found around $314. If you’re not able to fly to Washington, D.C. in October, then December is your next best option. Flight prices from St. Louis to Washington, D.C. during December average around $337.

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 Friday. momondo users have found tickets for Friday departures for as low as $401. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Washington, D.C. for around $524.

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

In the afternoon 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 $360. Flying to Washington, D.C. in the afternoon 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 $556. 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

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

There are 4 cabin classes available to choose from on 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 44% 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 September 2026, prices for St. Louis to Washington, D.C. flights are approximately 22% cheaper 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	$58
Fastest flight time	1h 55m
Direct flights	Every day
Airports in Washington, D.C.	2 airports

The best one-way flight to Washington, D.C. from St. Louis in the past 72 hours is $58. The best round-trip flight deal from St. Louis to Washington, D.C. found on momondo in the last 72 hours is $117.

The fastest flight from St. Louis to Washington, D.C. takes 1h 55m

Direct flights go from St. Louis to Washington, D.C. every day.

There are 2 airports in Washington, D.C.. From St. Louis there are direct flights to Washington, D.C. Reagan-National (DCA), Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD).

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Frequently asked questions about flying from St. Louis to Washington, D.C.

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 55m.
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.?
The number of operators available for flights from Lambert-St Louis Airport to Washington, D.C. is 5 as of September 2026.
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.?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from St. Louis to Washington, D.C. is Boeing 737 MAX 8 (22.38% of total bookings). The next most popular plane models are Embraer 175 (17.11%), Boeing 737-800 Passenger/BBJ2 (winglets) (14.00%), and Canadair (Bombardier) Regional Jet CRJ-550 (13.12%).
What is the most popular airline from St. Louis to Washington, D.C.?
Based on momondo bookings for flights between St. Louis and Washington, D.C., the leading airline is Southwest, making up 64% of the total bookings. Other popular airlines include American Airlines with 28%, Frontier with 5%, and United Airlines with 2%.

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
Frontier	PriceFrom $90	Free Cancellation	Rating 5.6 2,611 reviews	Search Frontier flights
Delta	PriceFrom $98	Free Cancellation	Rating 7.8 8,553 reviews	Search Delta flights
American Airlines	PriceFrom $235	Free Cancellation	Rating 7.1 12,047 reviews	Search American Airlines flights
Southwest	PriceFrom $250	Free Cancellation	Rating 8.0 4,195 reviews	Search Southwest flights
United Airlines	PriceFrom $271	Free Cancellation	Rating 7.4 10,194 reviews	Search United Airlines flights

Southwest Flights From St. Louis to Washington, D.C.
Southwest operates around 11 flights from St. Louis to Washington, D.C. every week. The average price of these flights found in the last 72 hours has been $413, but momondo users have found Southwest deals from St. Louis to Washington, D.C. from as low as $250 round-trip. Southwest has been scored 8.0/10 in 4,195 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 $271, round-trip. It should be noted that an average United Airlines flight deal for this route in this time was higher, at $457 round-trip. United Airlines operates 13 flights out of St. Louis into Washington, D.C. in an average week, so prices vary by time and availability. 10,194 United Airlines reviews by users on momondo have scored the airline at 7.4/10.

Alexandria

National Harbor

Arlington

Gettysburg

Laurel

Waldorf

Fredericksburg

Woodbridge

Gaithersburg

Linthicum Heights

Rockville

Silver Spring

Towson

Fairfax

Springfield

Colonial Beach

Glen Burnie

Edgewood

Bethesda

College Park

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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Feeling lucky

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

Washington, D.C. Reagan-National Airport

Washington, D.C. Dulles Intl Airport

Cheap flights from St. Louis to Washington, D.C. from $58

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 10/28. 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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American Airlines flights from St. Louis to Washington, D.C.

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

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