Cheap flights from Washington, D.C. (WAS) to St. Louis (STL)

WAS — STL
Dec 13 — Dec 201

The best prices from Washington, D.C. to Lambert-St Louis are usually found in January or February, booked 33 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

How to find the cheapest flight from Washington, D.C. (WAS) to St. Louis (STL)

All the information you need to plan the best WAS to STL flight in 2022: compare Washington, D.C. to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.

WAS - STL

Price

$242 - $400

STL

Temperature

32 - 80.6 °F

STL

Rainfall

2.2 - 4.7 inches

Popular inJuneHigh demand for flights, 15% potential price rise
Cheapest inJanuaryBest time to find cheap flights, 29% potential price drop
Round-trip from$242From Washington, D.C. (WAS) to Lambert-St Louis
One-way from$127One-way flight from Washington, D.C. (WAS) to Lambert-St Louis

What is the cheapest day to fly round-trip from Washington, D.C. to St. Louis?

Saturday flights are found to be more expensive to fly from Washington, D.C. to St. Louis. 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 St. Louis.

How far in advance should I book a flight from Washington, D.C. to St. Louis?

Find a great deal and save up to 20% by booking at least 29 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Washington, D.C. to St. Louis within the next two weeks, with the cheapest ticket starting at $355.

What is the cheapest month to fly from Washington, D.C. to St. Louis?

The best pricing can be found in the month of January. Prices to St. Louis from Washington, D.C. average $338. You can even find prices in January for less than $338, as users have found deals to St. Louis from as low as $157. The month of June appears to be one of the more expensive times to travel to St. Louis from Washington, D.C.. Flying in the targeted month can save you up to 18%.

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

It’s optimal to fly from Washington, D.C. to St. Louis in the morning. By choosing this option you can save up to 14% on the cost of your flight, compared to a flight at noon.

Cheap flights from Washington, D.C. to St. Louis in December, January 2022

The best prices found for WAS to STL flights for December, January
Dec 10 - Dec 12
DCA

Washington, D.C. Reagan-National

STL

Lambert-St Louis

1 stop

9h 22m
STL

Lambert-St Louis

DCA

Washington, D.C. Reagan-National

1 stop

8h 00m
$160

Frontier

Pick Dates

Deal found 12/6

Dec 7 - Dec 8
BWI

Baltimore/Washington

STL

Lambert-St Louis

1 stop

15h 25m
STL

Lambert-St Louis

BWI

Baltimore/Washington

1 stop

19h 46m
$165

Frontier

Pick Dates

Deal found 12/5

Dec 7 - Dec 9
DCA

Washington, D.C. Reagan-National

STL

Lambert-St Louis

1 stop

20h 52m
STL

Lambert-St Louis

DCA

Washington, D.C. Reagan-National

1 stop

8h 00m
$165

Frontier

Pick Dates

Deal found 12/5

Washington, D.C. to St. Louis 2022 flight deals

Cheap flights to St. Louis from Washington, D.C. found for this year
Dec 10 - Dec 12
DCA

Washington, D.C. Reagan-National

STL

Lambert-St Louis

1 stop

9h 22m
STL

Lambert-St Louis

DCA

Washington, D.C. Reagan-National

1 stop

8h 00m
$160

Frontier

Pick Dates

Deal found 12/6

Dec 7 - Dec 8
BWI

Baltimore/Washington

STL

Lambert-St Louis

1 stop

15h 25m
STL

Lambert-St Louis

BWI

Baltimore/Washington

1 stop

19h 46m
$165

Frontier

Pick Dates

Deal found 12/5

Dec 6 - Dec 8
DCA

Washington, D.C. Reagan-National

STL

Lambert-St Louis

1 stop

18h 50m
STL

Lambert-St Louis

DCA

Washington, D.C. Reagan-National

1 stop

21h 00m
$165

Frontier

Pick Dates

Deal found 12/5

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

Dec 15 - Dec 16
DCA

Washington, D.C. Reagan-National

STL

Lambert-St Louis

1 stop

7h 52m
STL

Lambert-St Louis

DCA

Washington, D.C. Reagan-National

1 stop

8h 00m
$160

Frontier

Pick Dates

Deal found 12/5

Jan 6 - Jan 9
BWI

Baltimore/Washington

STL

Lambert-St Louis

1 stop

16h 36m
STL

Lambert-St Louis

BWI

Baltimore/Washington

1 stop

15h 18m
$165

Frontier

Pick Dates

Deal found 12/5

Apr 5 - Apr 11
DCA

Washington, D.C. Reagan-National

STL

Lambert-St Louis

1 stop

8h 12m
STL

Lambert-St Louis

DCA

Washington, D.C. Reagan-National

1 stop

14h 52m
$167

Frontier

Pick Dates

Deal found 12/7

Cheap Spirit Airlines flights from Washington, D.C. to St. Louis

Jan 19 - Jan 22
BWI

Baltimore/Washington

STL

Lambert-St Louis

1 stop

10h 20m
STL

Lambert-St Louis

BWI

Baltimore/Washington

2 stops

24h 32m
$221

Spirit Airlines

Pick Dates

Deal found 12/5

Dec 20 - Jan 23
BWI

Baltimore/Washington

STL

Lambert-St Louis

1 stop

16h 07m
STL

Lambert-St Louis

BWI

Baltimore/Washington

1 stop

18h 57m
$235

Spirit Airlines

Pick Dates

Deal found 12/7

Jan 6 - Jan 9
BWI

Baltimore/Washington

STL

Lambert-St Louis

1 stop

9h 18m
STL

Lambert-St Louis

BWI

Baltimore/Washington

3 stops

22h 36m
$240

Spirit Airlines

Pick Dates

Deal found 12/5

Non-stop flights to St. Louis from Washington, D.C.

Save time with Washington, D.C. to St. Louis direct flight deals
Jan 11 - Jan 12
DCA

Washington, D.C. Reagan-National

STL

Lambert-St Louis

Nonstop

2h 36m
STL

Lambert-St Louis

DCA

Washington, D.C. Reagan-National

Nonstop

2h 11m
$206

American Airlines

Pick Dates

Deal found 12/5

Feb 9 - Feb 12
DCA

Washington, D.C. Reagan-National

STL

Lambert-St Louis

Nonstop

2h 38m
STL

Lambert-St Louis

DCA

Washington, D.C. Reagan-National

Nonstop

2h 14m
$244

American Airlines

Pick Dates

Deal found 12/6

Dec 22 - Jan 2
DCA

Washington, D.C. Reagan-National

STL

Lambert-St Louis

Nonstop

2h 31m
STL

Lambert-St Louis

DCA

Washington, D.C. Reagan-National

Nonstop

2h 04m
$251

American Airlines

Pick Dates

Deal found 12/5

Last minute flights from Washington, D.C. to St. Louis

Late deals on return flights to St. Louis from Washington, D.C., departing today and this week
Dec 15 - Dec 16
DCA

Washington, D.C. Reagan-National

STL

Lambert-St Louis

1 stop

7h 52m
STL

Lambert-St Louis

DCA

Washington, D.C. Reagan-National

1 stop

8h 00m
$160

Frontier

Pick Dates

Deal found 12/5

Dec 15 - Dec 19
BWI

Baltimore/Washington

STL

Lambert-St Louis

1 stop

15h 25m
STL

Lambert-St Louis

BWI

Baltimore/Washington

1 stop

13h 00m
$165

Frontier

Pick Dates

Deal found 12/6

Dec 13 - Jan 5
BWI

Baltimore/Washington

STL

Lambert-St Louis

1 stop

19h 02m
STL

Lambert-St Louis

BWI

Baltimore/Washington

1 stop

7h 24m
$174

Multiple Airlines

Pick Dates

Deal found 12/6

One-way flights to St. Louis from Washington, D.C.

The cheapest one-way flights from Washington, D.C. to St. Louis
Dec 15
DCA

Washington, D.C. Reagan-National

STL

Lambert-St Louis

1 stop

7h 52m
$81

Frontier

Pick Dates

Deal found 12/5

Jan 20
DCA

Washington, D.C. Reagan-National

STL

Lambert-St Louis

1 stop

20h 26m
$86

Frontier

Pick Dates

Deal found 12/5

Dec 14
BWI

Baltimore/Washington

STL

Lambert-St Louis

1 stop

16h 01m
$87

Frontier

Pick Dates

Deal found 12/7

Related info for your journey

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

What airport do you fly into for flights to St. Louis from Washington, D.C.?

Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. to St. Louis. 6 airlines have flights to Lambert-St Louis from Washington, D.C. on a regular basis. Booking flights from Washington, D.C. to Lambert-St Louis should not be difficult; the airport handles an average of 12 inbound flights from Washington, D.C. per day.

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

Due to the rapidly changing circumstances due to COVID-19, airlines like American Airlines, United Airlines, and Delta flying from Washington, D.C. to Lambert-St Louis have implemented new flexible cancellation policies.

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

Yes, there are multiple flights from Washington, D.C. to St. Louis for under $200. The cheapest flight booked recently is on Frontier for just $165, but on average you can expect to pay $189.

Are there nonstop flights from Washington, D.C. to St. Louis for under $300 on Cheapflights?

Cheapflights has at least 20 direct flights from Washington, D.C. to St. Louis under $300. A good price for a nonstop flight from Washington, D.C. to St. Louis is less than $274.

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

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

What days are nonstop flights available from Washington, D.C. to St. Louis?

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

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

Travelers can expect 2 flights from Washington, D.C. to St. Louis on average per day.
Afternoon (Noon - 6pm) - 100% of flight departures

How long is the flight from Washington, D.C. to St. Louis?

A quick flight from Washington, D.C. to St. Louis can take about 4h 45m. Frontier provides one of the quickest options available for as low as $165. There are 698 mi between Washington, D.C. and St. Louis. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines flying from Washington, D.C. to St. Louis round-trip?

Our cheapest airline available from Washington, D.C. to St. Louis is Frontier. Our recent data shows that you can find tickets from as low as $165 on this airline. Additional options worth looking into are American Airlines and Spirit Airlines, starting at $221 and $221 round-trip. These flights start at 51% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from Washington, D.C. to St. Louis one-way?

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $81. Spirit Airlines flights start at $89 while deals on American Airlines start at $110 one-way.

What are the most popular routes from Washington, D.C. to St. Louis?

When deciding which route to take from Washington, D.C. to St. Louis consider Washington, D.C. Dulles Intl - Lambert-St Louis, Washington, D.C. Reagan-National - Lambert-St Louis or Baltimore/Washington - Lambert-St Louis as they are the most popular.

What are the most popular airlines that fly from Washington, D.C. to St. Louis?

When booking a flight from Washington, D.C. to St. Louis, you may want to consider flying on Undisclosed Carrier, American Airlines or Delta as they are the most popular for this route.

What are the most reliable airlines from Washington, D.C. to St. Louis?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. to St. Louis on time: Avianca (97%), Scandinavian Airlines (94%), CommutAir (94%).

What are the cheapest flights from Washington, D.C. to St. Louis?

The cheapest flight price from Washington, D.C. to St. Louis is $124. On average you can expect to pay $660. The most popular route, (Washington, D.C. Dulles Intl - Lambert-St Louis), can usually be booked for $251.

Top 3 airlines flying from Washington, D.C. to St. Louis

The chart below displays the airlines Cheapflights users traveling from Washington, D.C. to St. Louis choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
American AirlinesCheapest$167Average$380FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
United AirlinesCheapest$182Average$409FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
DeltaCheapest$201Average$409FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights

Hourly flight availability from Washington, D.C. to St. Louis

See what time of day planes typically take off from Washington, D.C. to St. Louis
11%of flight departuresEarly morningMidnight to 6 am
22%of flight departuresMorning6 am to noon
60%of flight departuresAfternoonNoon to 6 pm
7%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Washington, D.C. to St. Louis

See how many times per day planes take to the skies headed from Washington, D.C. to St. Louis
Sunday6daily flights
Monday15daily flights
Tuesday15daily flights
Wednesday15daily flights
Thursday15daily flights
Friday14daily flights
Saturday7daily flights