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

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The best prices from Lambert-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)

All the information you need to plan the best STL to WAS flight in 2021: compare St. Louis to Washington flight prices with the expected peak season, weather and rainfall in Washington.
STL - WAS
Price
$172 - $329
WAS
Temperature
35.6 - 80.6 °F
WAS
Precipitation
2.6 - 4 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 Lambert-St Louis to Washington (WAS)

One-way from

$66

One-way flight from Lambert-St Louis to Washington (WAS)

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
When is the cheapest time to fly from St. Louis to Washington (STL - WAS)?

It’s typically best to fly out from St. Louis to Washington in the evening. Doing so could potentially save you 49% on the flight price compared to flying in the afternoon, which is usually more expensive.

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

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, August can be a great choice for travel to Washington. Flights to Washington from St. Louis in August are about $290 on average during August, but can be found for as low as $148.

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

Flights from St. Louis to Washington are found to be more expensive on Saturday. 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?

Travelers have found it’s best to book a flight 28 days in advance to save up to 45% 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 28 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 St. Louis to Washington 1-2 weeks in advance for as low as $355, or $447 for flights within the next 24 hours.

Cheap flights from St. Louis to Washington in October, November 2021

The best prices found for STL to WAS flights for October, November
16 Nov - 17 Nov
$96pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
13 Nov - 15 Nov
$102pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
10 Nov - 13 Nov
$105pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis

Lambert-St Louis to Washington 2021 flight deals

Cheap flights to Washington from St. Louis found for this year
16 Nov - 17 Nov
$96pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
1 Dec - 8 Dec
$98pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
13 Nov - 15 Nov
$102pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis

Non-stop flights to Washington from St. Louis

Save time with St. Louis to Washington direct flight deals
1 Dec - 8 Dec
$137pp
STL
Lambert-St Louis
American Airlines
Non-Stop
DCA
Washington Reagan-National
DCA
Washington Reagan-National
American Airlines
Non-Stop
STL
Lambert-St Louis
1 Dec - 8 Dec
$137pp
STL
Lambert-St Louis
United Airlines
Non-Stop
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
Non-Stop
STL
Lambert-St Louis
11 Dec - 14 Dec
$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

Last minute flights from St. Louis to Washington

Late deals on round-trip flights to Washington from St. Louis, departing today and this week
20 Oct - 21 Oct
$124pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
23 Oct - 30 Oct
$128pp
STL
Lambert-St Louis
Frontier
 
1 STOP
DCA
Washington Reagan-National
DCA
Washington Reagan-National
Frontier
 
1 STOP
STL
Lambert-St Louis
20 Oct - 21 Oct
$132pp
STL
Lambert-St Louis
Spirit Airlines
   
2 STOPS
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis

One-way flights to Washington from St. Louis

The cheapest one-way flights from St. Louis to Washington
3:00 am - 6:27 am
Multiple Airlines
1 Stop
27h 27m
STL - IAD
Multiple Airlines
$66
Kiwi.com
5:39 am - 5:43 pm
Frontier
1 Stop
11h 04m
STL - DCA
Frontier
$75
JustFly
10:00 am - 5:44 pm
American Airlines
1 Stop
6h 44m
STL - DCA
American Airlines

Related info for your journey

Useful info, stats and facts about <span class="emphasized">St. Louis</span> to <span class="emphasized">Washington</span> flights.

Flight FAQs

From St. Louis to Washington

What airport do you fly from for flights from St. Louis to Washington?

If you book a flight to Washington from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 12 flights from Lambert-St Louis to Washington per day from 6 different airlines.

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 $100 on Cheapflights?

Yes, there are multiple flights from St. Louis to Washington for under $100. The cheapest flight booked recently is on Multiple Airlines for just $96, but on average you can expect to pay $119.

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 $174.

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

Our cheapest airline available from St. Louis to Washington is Spirit Airlines. Our recent data shows that you can find tickets from as low as $113 on this airline. Additional options worth looking into are Frontier and American Airlines, starting at $128 and $137 round-trip. Spirit Airlines is priced at 61% lower than the current average price of a flight leaving 3 months from now.

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

The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $43. However, be on the lookout for offers from Frontier and American Airlines, as they are both options that can get you from St. Louis to Washington for a low price.

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

The most popular route from St. Louis to Washington is Lambert-St Louis - Washington Reagan-National. You may also consider Lambert-St Louis - Washington Dulles Intl or Lambert-St Louis - Baltimore/Washington.

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

Major Airline, American Airlines and Delta are the most popular airlines when flying from St. Louis to Washington.

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

The top 3 most reliable airlines when flying from St. Louis to Washington are United Airlines (83%), Brussels Airlines (82%) and GoJet (79%).

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

While on average a flight from St. Louis to Washington is generally $292, our data shows the cheapest flight currently is $111. When looking at the most popular route, (Lambert-St Louis - Washington Reagan-National), you can expect to pay $138 for that flight.

COVID Restrictions

View COVID Travel Restrictions for Washington, DC

Do I need a COVID test to fly to Washington from St. Louis?

Information is based on travel restrictions for travel to Washington within the United States

Most visitors from Lambert-St Louis need to provide a negative COVID-19 test result and/or quarantine to enter Washington.

COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Washington.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Washington.

Do I need a test to fly back to St. Louis from Washington?

Returning to Lambert-St Louis from Washington

COVID-19 testing requirements
Visitors from Washington must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Lambert-St Louis.

Quarantine requirements
Visitors from Washington are not required to quarantine after entering Lambert-St Louis.

Hide COVID Travel Restrictions for Washington, DC

Destination information for Washington

Things to know before you go - useful duration and weather info for your trip from St. Louis to Washington.
Flight duration from STL to Washington
2h 15m
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)

Top 4 airlines flying from Lambert-St Louis to Washington

The chart below displays the airlines Cheapflights users traveling from St. Louis to Washington choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Frontier
$112 $220 No cancel fee 62%
American Airlines
$123 $319 No cancel fee 71%
Delta
$130 $310 No cancel fee N/A
United Airlines
$131 $334 No cancel fee 69%

Hourly flight availability from St. Louis to Washington

See what time of day planes typically take off from St. Louis towards Washington.
Afternoon Noon to 6 PM 56% of STL to WAS departures
Morning 6 AM to noon 27% of STL to WAS departures
Early morning Midnight to 6 AM 17% 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
See how many times per day planes take to the skies headed from St. Louis to Washington.
Sunday
10 daily flights
Monday
11 daily flights
Tuesday
13 daily flights
Wednesday
14 daily flights
Thursday
13 daily flights
Friday
13 daily flights
Saturday
10 daily flights
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