Latest deals
Insights
FAQs
Reviews

Cheap flights from Washington, D.C. to St. Louis from $73

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 7/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
From?
To?
Tue 6/4
Tue 6/11

Deals available from 900+ travel sites.

"This year, momondo is the #1 place for airfares on the internet."
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.
Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.
Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.
Price Alerts
Price Alerts
Not ready to book? Create a price alert to track prices.

Easily compare round-trip flights from Washington, D.C. to St. Louis

Below you can see the best fares for your round-trip flight route over the next six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Washington, D.C. to St. Louis by changing tabs
Multiple Airlines
Aug 27
BWI6:10 amBaltimore/Washington
8h 27m
1 stop
STL1:37 pmLambert-St Louis
Aug 29
STL6:42 pmLambert-St Louis
13h 10m
1 stop
BWI8:52 amBaltimore/Washington
Frontier
Jun 5
BWI8:38 amBaltimore/Washington
23h 29m
1 stop
STL7:07 amLambert-St Louis
Jun 11
STL7:44 pmLambert-St Louis
11h 03m
1 stop
BWI7:47 amBaltimore/Washington
American Airlines
Jul 1
DCA8:00 pmWashington, D.C. Reagan-National
2h 28m
STL9:28 pmLambert-St Louis
Jul 3
STL6:09 amLambert-St Louis
2h 02m
DCA9:11 amWashington, D.C. Reagan-National
Spirit Airlines
Jun 10
BWI10:45 pmBaltimore/Washington
13h 12m
2 stops
STL10:57 amLambert-St Louis
Jun 11
STL3:23 pmLambert-St Louis
16h 12m
1 stop
BWI8:35 amBaltimore/Washington
Delta
Jul 1
IAD6:00 amWashington, D.C. Dulles Intl
4h 09m
1 stop
STL9:09 amLambert-St Louis
Jul 5
STL4:02 pmLambert-St Louis
4h 46m
1 stop
IAD9:48 pmWashington, D.C. Dulles Intl
United Airlines
Sep 22
IAD6:30 amWashington, D.C. Dulles Intl
4h 37m
1 stop
STL10:07 amLambert-St Louis
Sep 25
STL8:25 amLambert-St Louis
2h 08m
IAD11:33 amWashington, D.C. Dulles Intl

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

If you're looking for one-way flights from Washington, D.C. to St. Louis, view some of our deals below provided by American Airlines, Frontier and Spirit Airlines
Spirit Airlines
Jul 15
BWI10:40 pmBaltimore/Washington
11h 46m
1 stop
STL9:26 amLambert-St Louis
Frontier
Jun 5
BWI8:38 amBaltimore/Washington
23h 29m
1 stop
STL7:07 amLambert-St Louis
American Airlines
Jul 4
DCA3:26 pmWashington, D.C. Reagan-National
2h 25m
STL4:51 pmLambert-St Louis

Search last-minute flights to St. Louis from Washington, D.C.

Find and compare round-trip flight prices for your last-minute flight from Washington, D.C. to St. Louis
Frontier
Jun 5
BWI8:38 amBaltimore/Washington
23h 29m
1 stop
STL7:07 amLambert-St Louis
Jun 11
STL7:44 pmLambert-St Louis
11h 03m
1 stop
BWI7:47 amBaltimore/Washington
Multiple Airlines
Jun 6
BWI1:39 pmBaltimore/Washington
21h 01m
1 stop
STL9:40 amLambert-St Louis
Jun 13
STL8:12 pmLambert-St Louis
27h 38m
1 stop
BWI12:50 amBaltimore/Washington
Spirit Airlines
Jun 5
BWI10:45 pmBaltimore/Washington
19h 43m
1 stop
STL5:28 pmLambert-St Louis
Jun 11
STL3:23 pmLambert-St Louis
16h 12m
1 stop
BWI8:35 amBaltimore/Washington
Frontier
Jun 6
BWI1:39 pmBaltimore/Washington
21h 01m
1 stop
STL9:40 amLambert-St Louis
Jun 10
STL6:16 pmLambert-St Louis
19h 25m
1 stop
BWI2:41 pmBaltimore/Washington
Sun Country Air
Jun 7
IAD12:33 pmWashington, D.C. Dulles Intl
5h 38m
1 stop
STL5:11 pmLambert-St Louis
Jun 9
STL6:05 pmLambert-St Louis
14h 52m
1 stop
IAD9:57 amWashington, D.C. Dulles Intl
American Airlines
Jun 6
DCA7:42 amWashington, D.C. Reagan-National
2h 23m
STL9:05 amLambert-St Louis
Jun 10
STL6:09 amLambert-St Louis
2h 02m
DCA9:11 amWashington, D.C. Reagan-National

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

Our best Frontier deals on Washington, D.C. to St. Louis flight tickets
Frontier
Jun 5
BWI8:38 amBaltimore/Washington
23h 29m
1 stop
STL7:07 amLambert-St Louis
Jun 11
STL7:44 pmLambert-St Louis
11h 03m
1 stop
BWI7:47 amBaltimore/Washington
Frontier
Jun 10
BWI8:38 amBaltimore/Washington
23h 29m
1 stop
STL7:07 amLambert-St Louis
Jun 11
STL7:44 pmLambert-St Louis
11h 03m
1 stop
BWI7:47 amBaltimore/Washington
Frontier
Jun 6
BWI1:39 pmBaltimore/Washington
21h 01m
1 stop
STL9:40 amLambert-St Louis
Jun 10
STL6:16 pmLambert-St Louis
19h 25m
1 stop
BWI2:41 pmBaltimore/Washington

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

Our best American Airlines deals on Washington, D.C. to St. Louis flight tickets
American Airlines
Jul 1
DCA8:00 pmWashington, D.C. Reagan-National
2h 28m
STL9:28 pmLambert-St Louis
Jul 3
STL6:09 amLambert-St Louis
2h 02m
DCA9:11 amWashington, D.C. Reagan-National
American Airlines
Jul 1
DCA8:00 pmWashington, D.C. Reagan-National
2h 28m
STL9:28 pmLambert-St Louis
Jul 9
STL5:49 pmLambert-St Louis
2h 00m
DCA8:49 pmWashington, D.C. Reagan-National
American Airlines
Jul 3
DCA3:26 pmWashington, D.C. Reagan-National
2h 25m
STL4:51 pmLambert-St Louis
Jul 8
STL6:10 amLambert-St Louis
2h 01m
DCA9:11 amWashington, D.C. Reagan-National

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 May

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 Monday

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

At noon. Washington, D.C. to St. Louis flights are approximately 13% more expensive in the afternoon than at noon

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

Spirit Airlines. American Airlines, Delta, and Frontier are the most popular carriers operating from Washington, D.C. to St. Louis

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

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

As of May 2024, 11 flights take off from Washington, D.C. and land in St. Louis each day. The most common flight departure time for this route is 4:00PM, with 53% of daily flights taking off in the afternoon.

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

As of May 2024, there are 83 flights per week flying from Washington, D.C. to St. Louis. The most common day of the week flights depart is Sunday, with 14% of flights taking off on this day.

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

You could potentially save up to 26% on your flight if you consider stops on a Washington, D.C. to St. Louis flight.

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

$73

Fastest flight time

2h 07m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Washington, D.C. in the past 72 hours is $73. The best round-trip flight deal from Washington, D.C. to St. Louis found on momondo in the last 72 hours is $143.
The fastest flight from Washington, D.C. to St. Louis takes 2h 07m
Direct flights go from Washington, D.C. to St. Louis every day.
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 07m 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.


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
6.2
4,016 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $108Free CancellationRating
6.4
8,616 reviews
Search Spirit Airlines flights
United AirlinesPriceFrom $174Free CancellationRating
7.4
10,777 reviews
Search United Airlines flights
American AirlinesPriceFrom $180Free CancellationRating
7.3
14,284 reviews
Search American Airlines flights
DeltaPriceFrom $180Free CancellationRating
8.0
10,457 reviews
Search Delta flights
  • Southwest Flights From Washington, D.C. to St. Louis

    Southwest operates around 27 flights from Washington, D.C. to St. Louis every week. The average price of these flights found in the last 72 hours has been $431, but momondo users have found Southwest deals from Washington, D.C. to St. Louis from as low as $326 round-trip. Southwest has been scored 8.1/10 in 5,956 reviews.

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

    United Airlines (7.4/10 from 10,777 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 $396, with deals from around $174 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.


An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Tue 6/4
Tue 6/11
Email me momondo's favorite deals

Find better results for your trip to the United States