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 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
48.2 - 89.6 °F
WAS
Rainfall
2.4 - 4.2 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 St Louis to Washington

One-way from

$105

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 43 days before your planned departure. Booking around this time can save you about 14% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $262 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $293.

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

The best pricing can be found in the month of August. Prices to Washington from St Louis average $285. You can even find prices in August for less than $285, as users have found deals to Washington from as low as $90. The month of June 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 30%.

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

One of the essential ways to save on airfare from St Louis to Washington is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 49% on airfare.

Cheap flights from St Louis to Washington in May, June 2021

The best prices found for STL to WAS flights for May, June
16 Jun - 16 Jun
$166pp
STL
Lambert-St Louis
American Airlines
 
1 STOP
DCA
Washington Reagan-National
DCA
Washington Reagan-National
American Airlines
Non-Stop
STL
Lambert-St Louis
7 Jun - 9 Jun
$191pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
15 Jun - 22 Jun
$193pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis

St Louis to Washington 2021 flight deals

Cheap flights to Washington from St Louis found for this year
19 Aug - 26 Aug
$157pp
STL
Lambert-St Louis
American Airlines
Non-Stop
DCA
Washington Reagan-National
DCA
Washington Reagan-National
American Airlines
Non-Stop
STL
Lambert-St Louis
19 Aug - 26 Aug
$165pp
STL
Lambert-St Louis
American Airlines
Non-Stop
DCA
Washington Reagan-National
DCA
Washington Reagan-National
American Airlines
 
1 STOP
STL
Lambert-St Louis
23 Sep - 27 Sep
$165pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United Airlines
Non-Stop
STL
Lambert-St Louis

Non-stop flights to Washington from St Louis

Save time with St Louis to Washington direct flight deals
19 Aug - 26 Aug
$157pp
STL
Lambert-St Louis
American Airlines
Non-Stop
DCA
Washington Reagan-National
DCA
Washington Reagan-National
American Airlines
Non-Stop
STL
Lambert-St Louis
23 Sep - 27 Sep
$177pp
STL
Lambert-St Louis
American Airlines
Non-Stop
DCA
Washington Reagan-National
DCA
Washington Reagan-National
American Airlines
Non-Stop
STL
Lambert-St Louis
23 Sep - 27 Sep
$182pp
STL
Lambert-St Louis
United Airlines
Non-Stop
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
United 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
18 May - 19 May
$218pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington
BWI
Baltimore/Washington
Frontier
 
1 STOP
STL
Lambert-St Louis
17 May - 22 May
$239pp
STL
Lambert-St Louis
Frontier
 
1 STOP
DCA
Washington Reagan-National
DCA
Washington Reagan-National
Frontier
 
1 STOP
STL
Lambert-St Louis
21 May - 24 May
$240pp
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
3:00 am - 5:27 am
Spirit Airlines
1 Stop
25h 27m
STL - BWI
Spirit Airlines
$105
Gotogate
10:25 am - 3:45 pm
American Airlines
1 Stop
4h 20m
STL - DCA
American Airlines
12:40 pm - 6:11 pm
Delta
1 Stop
4h 31m
STL - DCA
Delta
$113
Delta

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

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.

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.

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 9 flights from Lambert-St Louis to Washington per day from 6 different airlines.

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 American Airlines for just $157, but on average you can expect to pay $180.

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 $256.

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.

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

You can find nonstop flights on the following days: Sunday, Monday, Wednesday, Friday, Saturday.

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

On average 4 flights depart from Lambert-St Louis to Washington per day.
Early Morning (Midnight to 6am) - 25% of flight departures
Morning (6am - Noon) - 75% of flight departures

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.

How long is the flight from St Louis to Washington?

United Airlines, American Airlines, and Major Airline can get you from St Louis to Washington in just under 2h. Your travel time will be generally consistent. There are 698 mi between St Louis and Washington. Generally, flights for this route are nonstop.

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

According to our current data, American Airlines ($157), Delta ($175), and United Airlines ($182) offers the cheapest pricing from St Louis to Washington. Users have found that American Airlines is 45% cheaper than the other options available to this destination.

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

For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $79. Users have also found prices from $79 and $88 on United Airlines and American Airlines, respectively.

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
2h 13m
Average temperature for May in Washington
77.0 °F
Avg rainfall for May in Washington
4.1 ″

Airports servicing St. Louis

Airports servicing Washington

Reagan National (DCA)

Top 4 airlines flying from 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%
Delta
$130 $310 No cancel fee N/A
American Airlines
$123 $319 No cancel fee 71%
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 74% of STL to WAS departures
Morning 6 AM to noon 25% of STL to WAS departures
Early morning Midnight to 6 AM 1% 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
12 daily flights
Tuesday
7 daily flights
Wednesday
7 daily flights
Thursday
11 daily flights
Friday
12 daily flights
Saturday
4 daily flights
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