Cheap flights from Washington to St. Louis

Round-trip
Economy
Washington (WAS)
St. Louis (STL)
Sat 3/27
Sat 4/3
Any month
Compare vs. momondo |

Flight information for Washington to St. Louis
(WAS to STL)

Find info about flight duration, direct flights, and airports for your flight from Washington to St. Louis
Best Price Found$126The best flight deal from Washington to St. Louis found on momondo in the last 72 hours is $126
Fastest flight time2h 31mThe fastest flight from Washington to St. Louis takes 2h 31m.
Direct flightsFrDirect flights go from Washington to St. Louis on Friday. Airline offering direct flights is United Airlines..
Airports in St. Louis1 airportThere is 1 airport near St. Louis: Lambert-St Louis (STL)

How to get the cheapest flight ticket from Washington 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 to St. Louis?

July
The cheapest time of year to fly to St. Louis from Washington is July. Most expensive is January

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

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

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

at noon
Washington to St. Louis flights are approximately 11% more expensive in the afternoon than at noon

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

Frontier
Frontier, Delta, and Major Airline are the most popular carriers operating from Washington to St. Louis

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

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

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

31 days before
The cheapest time to buy a flight from Washington to St. Louis is approximately 31 days to departure
60
Days before departure
0

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

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Washington to St. Louis by changing tabs
Multiple Airlines
Apr 29
10:15 am
Baltimore/Washington
7h 18m
1 stop
5:33 pm
Lambert-St Louis
May 3
10:42 am
Lambert-St Louis
4h 29m
1 stop
3:11 pm
Baltimore/Washington
Multiple Airlines
Apr 8
9:55 am
Washington Reagan-National
2h 20m
12:15 pm
Lambert-St Louis
Apr 10
7:12 am
Lambert-St Louis
9h 47m
1 stop
4:59 pm
Washington Reagan-National
Multiple Airlines
Apr 8
9:55 am
Washington Reagan-National
2h 20m
12:15 pm
Lambert-St Louis
Apr 12
6:20 am
Lambert-St Louis
10h 39m
1 stop
4:59 pm
Washington Reagan-National

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

If you're looking for one-way flights from Washington to St. Louis, view some of our deals below provided by Frontier
American Airlines
Apr 14
9:55 am
Washington Reagan-National
2h 20m
12:15 pm
Lambert-St Louis
United Airlines
Mar 18
1:30 pm
Washington Dulles Intl
2h 31m
4:01 pm
Lambert-St Louis
American Airlines
Mar 18
6:40 am
Washington Dulles Intl
4h 21m
1 stop
11:01 am
Lambert-St Louis

Best airlines flying from Washington to St. Louis

Compare and see reviews for airlines that fly from Washington to St. Louis with momondo
AirlineRatingFree CancellationPrice
Frontier
PriceFrom $105
Free Cancellation
Rating
7.0
American Airlines
PriceFrom $128
Free Cancellation
Rating
7.2
7.9

Boarding

7.0

Comfort

7.7

Crew

7.4

Entertainment

6.4

Food

Reviews

Pros: Entertainment

Cons: The seat space/leg room is tiny. I found it impossible to fall asleep, being in the middle of a row of three with two "big" people in either side.

1 / 8
Delta
PriceFrom $155
Free Cancellation
Rating
8.3
8.2

Boarding

8.5

Comfort

8.8

Crew

7.8

Entertainment

8.1

Food

Reviews

Pros: I appreciate the choice of snacks.

Cons: The coffee served on the flight was lukewarm.

1 / 9
United Airlines
PriceFrom $155
Free Cancellation
Rating
6.6
6.4

Boarding

7.0

Comfort

7.3

Crew

6.0

Entertainment

6.6

Food

Reviews

Pros: It was meh....

Cons: I got no notification that the flight was going to be 1 hour earlier

1 / 6
Southwest
PriceFrom $208
Free Cancellation
Rating
10.0

Which airlines flying from Washington to Lambert-St Louis have COVID-19 safety policies in place?

Airlines such as Delta have taken additional precautions to make sure you’re safer while traveling. Many airlines flying from Washington to Lambert-St Louis are offering enhanced cleaning of their aircraft. Additional policies include pre-flight testing for COVID-19-related symptoms and antibodies. Masks are also required and are provided to travelers. Some airlines are offering socially-distanced seating for a limited time. Policies will vary by airline so keep this in mind as you search for options.

Are airlines flying from Washington to Lambert-St Louis offering flexible cancellation due to COVID-19?

Due to the global impact of COVID-19, some of our airline partners operating flights from Washington to Lambert-St Louis, such as American Airlines, United Airlines, and Delta may have put in place flexible cancellation policies. Use our site to search for all of the airlines offering this flexibility to you.


Alternative routes for Washington to St. Louis

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Washington to Kansas City Flights
Fastest flight time
4h 27m
Cheapest price
$79

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