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Cheap flights from St Louis to Washington (STL - WAS)

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The best prices from St Louis to Washington are usually found in August or July, booked 30 days in advance, depart on a Saturday or Tuesday and return on a Tuesday

How to find the cheapest flight from
St Louis (STL) to Washington (WAS)

STL - WAS
Price
$172 - $329
WAS
Temperature
48.2 - 89.6 °F
WAS
Rainfall
2.4 - 4.2 inches

Popular in

March

High demand for flights, 12% potential price rise

Cheapest in

August

Best time to find cheap flights, 41% potential price drop

Round-trip from

$172

From St Louis to Washington

One-way from

$81

One-way flight from St Louis to Washington

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from St Louis to Washington?

Saturday flights are found to be more expensive to fly from St Louis to Washington. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington.

How far in advance should I book a flight from St Louis to Washington?

To save on the cost of your flight from St Louis to Washington, book at least 43 days before your planned departure. Booking around this time can save you about 14% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $262 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $293.

What is the cheapest month to fly from St Louis to Washington?

The best pricing can be found in the month of August. Prices to Washington from St Louis average $285. You can even find prices in August for less than $285, as users have found deals to Washington from as low as $90. The month of June appears to be one of the more expensive times to travel to Washington from St Louis. Flying in the targeted month can save you up to 30%.

When is the cheapest time to fly from St Louis to Washington (STL - WAS)?

One of the essential ways to save on airfare from St Louis to Washington is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 47% on airfare.

Cheap flights from St Louis to Washington in October, November 2020

The best prices found for STL to WAS flights for October, November
27 Oct - 31 Oct
$103pp
STL
Lambert-St Louis
Frontier
 
1 STOP
DCA
Washington Reagan-National
DCA
Washington Reagan-National
Frontier
 
1 STOP
STL
Lambert-St Louis
30 Oct - 2 Nov
$123pp
STL
Lambert-St Louis
Frontier
 
1 STOP
DCA
Washington Reagan-National
DCA
Washington Reagan-National
Frontier
 
1 STOP
STL
Lambert-St Louis
29 Oct - 2 Nov
$133pp
STL
Lambert-St Louis
Frontier
 
1 STOP
DCA
Washington Reagan-National
DCA
Washington Reagan-National
Frontier
 
1 STOP
STL
Lambert-St Louis

St Louis to Washington 2020 flight deals

Cheap flights to Washington from St Louis found for this year
27 Oct - 31 Oct
$103pp
STL
Lambert-St Louis
Frontier
 
1 STOP
DCA
Washington Reagan-National
DCA
Washington Reagan-National
Frontier
 
1 STOP
STL
Lambert-St Louis
30 Oct - 2 Nov
$123pp
STL
Lambert-St Louis
Frontier
 
1 STOP
DCA
Washington Reagan-National
DCA
Washington Reagan-National
Frontier
 
1 STOP
STL
Lambert-St Louis
29 Oct - 2 Nov
$133pp
STL
Lambert-St Louis
Frontier
 
1 STOP
DCA
Washington Reagan-National
DCA
Washington Reagan-National
Frontier
 
1 STOP
STL
Lambert-St Louis

Non-stop flights to Washington from St Louis

Save time with St Louis to Washington direct flight deals
6 Jan - 7 Jan
$147pp
STL
Lambert-St Louis
American Airlines
Non-Stop
DCA
Washington Reagan-National
DCA
Washington Reagan-National
American Airlines
Non-Stop
STL
Lambert-St Louis
4 Dec - 10 Dec
$167pp
STL
Lambert-St Louis
American Airlines
Non-Stop
DCA
Washington Reagan-National
DCA
Washington Reagan-National
American Airlines
Non-Stop
STL
Lambert-St Louis
7 Dec - 11 Jan
$177pp
STL
Lambert-St Louis
United Airlines
Non-Stop
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
Non-Stop
STL
Lambert-St Louis

Last minute flights from St Louis to Washington

Late deals on round-trip flights to Washington from St Louis, departing today and this week
2 Nov - 16 Nov
$143pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Frontier
 
1 STOP
STL
Lambert-St Louis
3 Nov - 5 Nov
$173pp
STL
Lambert-St Louis
Frontier
 
1 STOP
DCA
Washington Reagan-National
DCA
Washington Reagan-National
Frontier
 
1 STOP
STL
Lambert-St Louis
3 Nov - 6 Nov
$175pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Frontier
 
1 STOP
STL
Lambert-St Louis

One-way flights to Washington from St Louis

The cheapest one-way flights from St Louis to Washington
4:55 am - 4:32 pm
Frontier
1 Stop
10h 37m
STL - DCA
Frontier
$81
KAYAK
1:15 am - 10:15 am
Delta
1 Stop
8h 00m
STL - BWI
Delta
$99
Delta
9:46 am - 11:39 am
Multiple Airlines
2 Stops
24h 53m
STL - BWI
Multiple Airlines
$109
Kiwi.com

Related info for your journey

Useful info, stats and facts about St Louis to Washington flights.

Flight FAQs

From St Louis to Washington

Are flight prices decreasing from St Louis to Washington due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both St Louis and Washington for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Lambert-St Louis to Washington to control the spread of COVID-19?

New policies can now be found on Southwest and Delta to help keep travelers safe while flying. New policies for travelers booking flights from Lambert-St Louis to Washington include masks being provided and required on board, daily cleaning and sanitization, use of HEPA filters, pre-flight testing for antibodies and symptoms, and socially distanced seating (for a limited time). Keep in mind that policies will vary by airline.

Which airlines flying from Lambert-St Louis to Washington have flexible cancellations due to COVID-19?

Some of our airline partners flying from Lambert-St Louis to Washington have new flexible policies in place due to COVID-19. American Airlines, United Airlines, and Delta are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like American Airlines with this kind of flexibility.

Can I find flights from St Louis to Washington for under $200 on Cheapflights?

Yes, there are multiple flights from St Louis to Washington for under $200. The cheapest flight booked recently is on Frontier for just $138, but on average you can expect to pay $160.

Are there nonstop flights from St Louis to Washington for under $200 on Cheapflights?

Cheapflights has at least 20 direct flights from St Louis to Washington under $200. A good price for a nonstop flight from St Louis to Washington is less than $244.

Are there last-minute flights available from St Louis to Washington for under $200?

There are currently 20+ open flights from St Louis to Washington within the next 7 days for less than $200.

What days are nonstop flights available from St Louis to Washington?

You can find nonstop flights on the following days: Friday, Saturday.

How many flights depart from St Louis to Washington on average per day?

On average 6 flights depart from Lambert-St Louis to Washington per day.
Morning (6am - Noon) - 17% of flight departures
Afternoon (Noon - 6pm) - 83% of flight departures

Is St Louis weather warmer or cooler than Washington?

Expect the weather to be around 90 °F on average in July. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Washington is generally the same as in St Louis.

How long is the flight from St Louis to Washington?

United Airlines, American Airlines, and Delta can get you from St Louis to Washington in just under 2h 01m. Your travel time can differ by up to 1h 37m. There are 698 mi between St Louis and Washington. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines flying from St Louis to Washington round-trip?

According to our current data, Frontier ($138), American Airlines ($147), and United Airlines ($174) offers the cheapest pricing from St Louis to Washington. Users have found that Frontier is 52% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from St Louis to Washington one-way?

For one-way options, check prices for Frontier. According to our data, you can fly for as low as $60. Users have also found prices from $74 and $78 on Frontier and American Airlines, respectively.

Destination information for Washington

Things to know before you go. Useful info for your trip from St Louis to Washington
Flight duration
2h 13m
Average temperature for October in Washington
71.6 °F
Avg rainfall for October in Washington
3.7 ″

Airports servicing St. Louis

Airports servicing Washington

Reagan National (DCA)

Hourly flight availability from St Louis to Washington

Afternoon Noon to 6 PM 60% of STL to WAS departures
Early morning Midnight to 6 AM 25% of STL to WAS departures
Morning 6 AM to noon 15% of STL to WAS departures
Evening 6 PM to midnight 0% of STL to WAS departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from St Louis to Washington
Sunday
3 daily flights
Monday
8 daily flights
Tuesday
5 daily flights
Wednesday
5 daily flights
Thursday
8 daily flights
Friday
8 daily flights
Saturday
5 daily flights