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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 January or February, booked 57 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
$248 - $311
WAS
Temperature
48.2 - 89.6 °F
WAS
Rainfall
2.4 - 4.2 inches
Popular in October High demand for flights, 9% potential price rise
Cheapest in January Best time to find cheap flights, 13% potential price drop
Round-trip from $248 From St Louis to Washington
One-way from $75 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 28 days before your planned departure. Booking around this time can save you about 11% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $252 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $276.

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

The best pricing can be found in the month of February. Prices to Washington from St Louis average $243. You can even find prices in February for less than $243, as users have found deals to Washington from as low as $119. The month of December 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 37%.

Cheap flights from St Louis to Washington in July, August 2020

The best prices found for STL to WAS flights for July, August
8 Jul - 11 Jul
$160pp
STL
Lambert-St Louis
Multiple Airlines
Non-Stop
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis
7 Jul - 11 Jul
$161pp
STL
Lambert-St Louis
Multiple Airlines
Non-Stop
DCA
Washington Reagan-National
DCA
Washington Reagan-National
Delta
 
1 STOP
STL
Lambert-St Louis
1 Jul - 4 Jul
$164pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
 
1 STOP
STL
Lambert-St Louis

St Louis to Washington 2020 flight deals

Cheap flights to Washington from St Louis found for this year
15 Sep - 19 Sep
$160pp
STL
Lambert-St Louis
Multiple Airlines
Non-Stop
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis
7 Jul - 11 Jul
$161pp
STL
Lambert-St Louis
Multiple Airlines
Non-Stop
DCA
Washington Reagan-National
DCA
Washington Reagan-National
Delta
 
1 STOP
STL
Lambert-St Louis
14 Sep - 23 Sep
$161pp
STL
Lambert-St Louis
Multiple Airlines
Non-Stop
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Delta
 
1 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
27 Jun - 5 Jul
$228pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
28 Jun - 15 Jul
$230pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
Non-Stop
STL
Lambert-St Louis
26 Jun - 30 Jun
$241pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
DCA
Washington Reagan-National
DCA
Washington Reagan-National
American Airlines
Non-Stop
STL
Lambert-St Louis

One-way flights to Washington from St Louis

The cheapest one-way flights from St Louis to Washington
1:05 pm - 7:04 am
Sun Country Air
1 Stop
16h 59m
STL - BWI
Sun Country Air
8:19 am - 1:54 pm
Major Airline
1 Stop
4h 35m
STL - BWI
Major Airline
$152
StudentUniverse
7:00 am - 6:55 am
Multiple Airlines
2 Stops
22h 55m
STL - BWI
Multiple Airlines
$180
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.

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 Multiple Airlines for just $160, but on average you can expect to pay $169.

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

There are no nonstop flights from St Louis to Washington, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from St Louis to Washington for under $300?

There are currently 20+ open flights from St Louis to Washington within the next 7 days for less than $300.

How popular is this flight route?

This flight path from Lambert-St Louis to Washington was viewed by 30 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

What is the cheapest airline for this route?

When searching, try setting your filters to view flights for American Airlines Inc., as currently they have the cheapest options available from St Louis to Washington. On average you can find 74 flights for this flight path daily.

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.

Destination information for Washington

Things to know before you go. Useful info for your trip from St Louis to Washington
Average temperature for July in Washington
89.6 °F
Avg rainfall for July in Washington
4.0 ″

Airports servicing St. Louis

Airports servicing Washington

Reagan National (DCA)

Hourly flight availability from St Louis to Washington

Morning 6 AM to noon 43% of STL to WAS departures
Early morning Midnight to 6 AM 25% of STL to WAS departures
Afternoon Noon to 6 PM 20% of STL to WAS departures
Evening 6 PM to midnight 12% of STL to WAS departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from St Louis to Washington
Sunday
8 daily flights
Monday
8 daily flights
Tuesday
7 daily flights
Wednesday
7 daily flights
Thursday
8 daily flights
Friday
8 daily flights
Saturday
3 daily flights