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

Know your dates, get live prices in seconds:

From
To
Depart
Return
Any month
Compare vs. Cheapflights |
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime

We work with more than 300 partners to bring you better travel deals

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

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

All the information you need to plan the best STL to WAS flight in 2022: compare St. Louis to Washington, D.C. flight prices with the expected peak season, weather and rainfall in Washington, D.C..
STL - WAS
Price
$172 - $329
WAS
Temperature
35.6 - 80.6 °F
WAS
Rainfall
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, D.C. (WAS)

One-way from

$133

One-way flight from Lambert-St Louis to Washington, D.C. (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, D.C. (STL - WAS)?

It’s typically best to fly out from St. Louis to Washington, D.C. at noon. Doing so could potentially save you 14% on the flight price compared to flying in the morning, which is usually more expensive.

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

Flights from St. Louis to Washington, D.C. 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, D.C..

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

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, D.C. 1-2 weeks in advance for as low as $355, or $447 for flights within the next 24 hours.

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

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, D.C.. Flights to Washington, D.C. from St. Louis in August are about $290 on average during August, but can be found for as low as $148.

Cheap flights from St. Louis to Washington, D.C. in May, June 2022

The best prices found for STL to WAS flights for May, June
31 May - 3 Jun
$214pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
2 Jun - 7 Jun
$227pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
2 Jun - 7 Jun
$244pp
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, D.C. 2022 flight deals

Cheap flights to Washington, D.C. from St. Louis found for this year
22 Oct - 29 Oct
$198pp
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington, D.C. Dulles Intl
IAD
Washington, D.C. Dulles Intl
Delta
 
1 STOP
STL
Lambert-St Louis
15 Sep - 19 Sep
$198pp
STL
Lambert-St Louis
Delta
 
1 STOP
DCA
Washington, D.C. Reagan-National
DCA
Washington, D.C. Reagan-National
Delta
 
1 STOP
STL
Lambert-St Louis
31 May - 3 Jun
$214pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis

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

Save time with St. Louis to Washington, D.C. direct flight deals
6 Jul - 12 Jul
$282pp
STL
Lambert-St Louis
American Airlines
Non-Stop
DCA
Washington, D.C. Reagan-National
DCA
Washington, D.C. Reagan-National
American Airlines
Non-Stop
STL
Lambert-St Louis
8 Jun - 14 Jun
$293pp
STL
Lambert-St Louis
American Airlines
Non-Stop
DCA
Washington, D.C. Reagan-National
DCA
Washington, D.C. Reagan-National
American Airlines
Non-Stop
STL
Lambert-St Louis
15 Sep - 20 Sep
$302pp
STL
Lambert-St Louis
American Airlines
Non-Stop
DCA
Washington, D.C. Reagan-National
DCA
Washington, D.C. Reagan-National
American Airlines
Non-Stop
STL
Lambert-St Louis

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

Late deals on round-trip flights to Washington, D.C. from St. Louis, departing today and this week
31 May - 3 Jun
$214pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
2 Jun - 7 Jun
$227pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
2 Jun - 7 Jun
$244pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis

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

The cheapest one-way flights from St. Louis to Washington, D.C.
2:12 pm - 6:51 pm
Delta
1 Stop
3h 39m
STL - IAD
Delta
$133
Delta
4:18 pm - 12:49 pm
Frontier
1 Stop
19h 31m
STL - BWI
Frontier
$148
Kiwi.com
2:07 am - 5:12 am
American Airlines
Nonstop
2h 05m
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, D.C.</span> flights.

Flight FAQs

From St. Louis to Washington, D.C.

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

If you book a flight to Washington, D.C. 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 10 flights from Lambert-St Louis to Washington, D.C. per day from 6 different airlines.

Which airlines flying from Lambert-St Louis to Washington, D.C. 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 Lambert-St Louis to Washington, D.C. have implemented new flexible cancellation policies.

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

Yes, there are multiple flights from St. Louis to Washington, D.C. for under $200. The cheapest flight booked recently is on Delta for just $198, but on average you can expect to pay $257.

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

Cheapflights has at least 20 direct flights from St. Louis to Washington, D.C. under $300. A good price for a nonstop flight from St. Louis to Washington, D.C. is less than $331.

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

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

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

Flying on Delta is currently your cheapest option to Washington, D.C., with prices starting at $198. Additional round-trip tickets that might be worth considering are offered by Spirit Airlines and American Airlines, with the lowest prices starting at $250 and $282, respectively. Delta is 31% cheaper than the average price of flights available within the next 90 days to this destination.

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

For one-way options, check prices for Delta. According to our data, you can fly for as low as $99. Users have also found prices from $103 and $111 on Frontier and Spirit Airlines, respectively.

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

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

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

While on average a flight from St. Louis to Washington, D.C. is generally $406, our data shows the cheapest flight currently is $28. When looking at the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl), you can expect to pay $198 for that flight.

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

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

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

The top 3 most reliable airlines when flying from St. Louis to Washington, D.C. are Avianca (94%), GoJet (92%) and Scandinavian Airlines (79%).

COVID Restrictions

View COVID Travel Restrictions for Washington, D.C., DC

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

Information is based on travel restrictions for travel to Washington, D.C. 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, D.C..

COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Washington, D.C..

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

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

Returning to Lambert-St Louis from Washington, D.C.

COVID-19 testing requirements
Visitors from Washington, D.C. must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Lambert-St Louis.

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

Hide COVID Travel Restrictions for Washington, D.C., DC

Destination information for Washington, D.C.

Things to know before you go - useful duration and weather info for your trip from St. Louis to Washington, D.C..
Flight duration from STL to Washington, D.C.
2h 12m
Average temperature for May in Washington, D.C.
77.0 °F
Avg rainfall for May in Washington, D.C.
4.1 ″

Airports servicing St. Louis

Airports servicing Washington, D.C.

Reagan-National (DCA)

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

The chart below displays the airlines Cheapflights users traveling from St. Louis to Washington, D.C. 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
Delta
$107 $275 No cancel fee N/A
American Airlines
$141 $323 No cancel fee 71%
United Airlines
$152 $266 No cancel fee 69%

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

See what time of day planes typically take off from St. Louis towards Washington, D.C..
Morning 6 AM to noon 48% of STL to WAS departures
Afternoon Noon to 6 PM 26% of STL to WAS departures
Evening 6 PM to midnight 17% of STL to WAS departures
Early morning Midnight to 6 AM 9% of STL to WAS departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from St. Louis to Washington, D.C.
See how many times per day planes take to the skies headed from St. Louis to Washington, D.C..
Sunday
10 daily flights
Monday
11 daily flights
Tuesday
12 daily flights
Wednesday
11 daily flights
Thursday
12 daily flights
Friday
12 daily flights
Saturday
4 daily flights
Home North America USA Washington, D.C. Cheap flights from St. Louis to Washington, D.C.