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

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The best prices from Washington to St Louis are usually found in January or March, booked 45 days in advance, depart on a Tuesday or Saturday and return on a Saturday

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

WAS - STL
Price
$254 - $344
STL
Temperature
44.6 - 89.6 °F
STL
Rainfall
2.2 - 5.1 inches
Popular in July High demand for flights, 14% potential price rise
Cheapest in January Best time to find cheap flights, 14% potential price drop
Round-trip from RM 254 From Washington to St Louis
One-way from RM 126 One-way flight from Washington to St Louis
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 Washington to St Louis?

It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

Travelers have found it’s best to book a flight 61 days in advance to save up to 27% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 61 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Washington to St Louis 1-2 weeks in advance for as low as $164, or $181 for flights within the next 24 hours.

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

It’s optimal to fly from Washington to St Louis at noon. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight in the afternoon.

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

The best prices found for WAS to STL flights for September, October
13 Oct - 15 Oct
$127pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
Non-Stop
IAD
Washington Dulles Intl
10 Oct - 14 Oct
$137pp
IAD
Washington Dulles Intl
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington Dulles Intl
13 Oct - 16 Oct
$140pp
IAD
Washington Dulles Intl
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
 
1 STOP
IAD
Washington Dulles Intl

Washington to St Louis 2020 flight deals

Cheap flights to St Louis from Washington found for this year
13 Oct - 15 Oct
$127pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
Non-Stop
IAD
Washington Dulles Intl
14 Nov - 21 Nov
$129pp
DCA
Washington Reagan-National
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
 
1 STOP
DCA
Washington Reagan-National
10 Oct - 14 Oct
$137pp
IAD
Washington Dulles Intl
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington Dulles Intl

Last minute flights from Washington to St Louis

Late deals on round-trip flights to St Louis from Washington, departing today and this week
4 Oct - 7 Oct
$137pp
IAD
Washington Dulles Intl
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington Dulles Intl
30 Sep - 5 Oct
$148pp
DCA
Washington Reagan-National
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Delta
 
1 STOP
DCA
Washington Reagan-National
1 Oct - 6 Oct
$170pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
Non-Stop
IAD
Washington Dulles Intl

One-way flights to St Louis from Washington

The cheapest one-way flights from Washington to St Louis
11:00 am - 5:36 pm
Major Airline
2 Stops
7h 36m
DCA - STL
Major Airline
$126
StudentUniverse
1:00 pm - 3:39 pm
Delta
1 Stop
3h 39m
BWI - STL
Delta
$163
Delta
3:00 am - 10:03 am
Multiple Airlines
2 Stops
8h 03m
IAD - STL
Multiple Airlines
$202
United

Related info for your journey

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

Flight FAQs

From Washington to St Louis

Are flight prices decreasing from Washington to St Louis 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 Washington and St Louis 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 Washington to St Louis for under $200 on Cheapflights?

Yes, there are multiple flights from Washington to St Louis for under $200. The cheapest flight booked recently is on Multiple Airlines for just $127, but on average you can expect to pay $153.

Are there nonstop flights from Washington to St Louis for under $100 on Cheapflights?

There are no nonstop flights from Washington to St Louis, 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 Washington to St Louis for under $200?

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

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

Days when nonstop flights are available for this flight are: Tuesday.

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

On average 1 flight departs from Washington to Lambert-St Louis per day.
Afternoon (Noon - 6pm) - 100% of flight departures

Is Washington weather warmer or cooler than St Louis?

Our data indicates that the weather will be 90 °F on average in the month of July. The temperature in St Louis is typically the same as in Washington. If you're traveling when the temperature is at its warmest, push to plan early, as flight price and availability will have an impact on your travels. For the best results, search for flights well in advance or after peak season.

How long is the flight from Washington to St Louis?

For as low as $226, Delta can have you in St Louis from Washington in 4h 04m. Airlines will cover a distance of 698 mi.

What is the cheapest airline to fly from Washington to St Louis round-trip?

Cheapflights users have booked flights from Washington to St Louis round-trip from $158. Delta is currently priced 46% below the average price you’ll pay for this route.

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

One-way options have recently been found by users for as low as $79 on Delta. Another option is Major Airline, who have fights from $80.

Destination information for St Louis

Things to know before you go. Useful info for your trip from Washington to St Louis
Average temperature for September in St Louis
82.4 °F
Avg rainfall for September in St Louis
3.0 ″

Airports servicing Washington

Reagan National (DCA)

Airports servicing St. Louis

Hourly flight availability from Washington to St Louis

Afternoon Noon to 6 PM 65% of WAS to STL departures
Morning 6 AM to noon 35% of WAS to STL departures
Early morning Midnight to 6 AM 0% of WAS to STL departures
Evening 6 PM to midnight 0% of WAS to STL departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Washington to St Louis
Sunday
9 daily flights
Monday
8 daily flights
Tuesday
8 daily flights
Wednesday
9 daily flights
Thursday
8 daily flights
Friday
8 daily flights
Saturday
8 daily flights
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