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

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Find the cheapest flights from St. Louis to Washington, D.C.

Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from St. Louis to Washington, D.C..
STL-DCA
2h 03mdirect
DCA-STL
2h 22mdirect
American Airlines
Find Deal
STL-IAD
2h 08mdirect
IAD-STL
2h 28mdirect
Avianca
Find Deal
STL-DCA
2h 00mdirect
DCA-STL
2h 10mdirect
Southwest
Find Deal
STL-IAD
2h 08mdirect
IAD-STL
2h 28mdirect
Copa Airlines
Find Deal
STL-IAD
2h 06mdirect
IAD-STL
2h 23mdirect
Brussels Airlines
Find Deal
STL-IAD
2h 08mdirect
IAD-STL
2h 23mdirect
Lufthansa
Find Deal
STL-IAD
2h 08mdirect
IAD-STL
2h 28mdirect
United Airlines
Find Deal

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from St. Louis to Washington, D.C.

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

In general, November is the cheapest month to fly from St. Louis to Washington, D.C.. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around R4 384. If you aren’t able to travel during the month of November, then book flights to Washington, D.C. from St. Louis during August instead. Flights to Washington, D.C. in August, while not as cheap as those in November, still average around R4 641.

What is the cheapest Lambert-St Louis to Washington, D.C. flight route?

Fly from Lambert-St Louis to Washington, D.C. Dulles Intl for the best Lambert-St Louis - Washington, D.C. flight prices

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

You are more likely to see cheaper flights to Washington, D.C. from St. Louis when booking 10 weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around R6 129 when searching 10 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from St. Louis for as low as R4 751 on momondo.

What cabin class options are available on Lambert-St Louis to Washington, D.C. flights?

There are 1 cabin classes available to choose from on Lambert-St Louis to Washington, D.C. flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have St. Louis to Washington, D.C. flight prices changed over time?

As of April 2025, prices for St. Louis to Washington, D.C. flights are approximately 1% cheaper when compared to flights at the same time last year.

When to book flights from St. Louis to Washington, D.C.

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Washington, D.C. according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap St. Louis to Washington, D.C. (STL to WAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Washington, D.C.

Direct flights

None
There are no direct flights from St. Louis to Washington, D.C.. There are no popular flight routes from St. Louis to Washington, D.C..

  • How far is Lambert-St Louis to Washington, D.C. by plane?

    Lambert-St Louis and Washington, D.C. are 1139,8 km apart from one another.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Washington, D.C.?

    Prices for flights from Lambert-St Louis Airport to Washington, D.C. are updated daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to Washington, D.C.?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The required travel and health documents for your Washington, D.C. trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from St. Louis to Washington, D.C.?


Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Easton
Gettysburg
Arlington
Woodbridge
Owings Mills

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Washington, D.C.?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Washington, D.C. . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Washington, D.C. with flexible booking policies on momondo?

momondo does allow users to show only those flights to Washington, D.C. from St. Louis which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from St. Louis to Washington, D.C.?

Once all potential St. Louis to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Washington, D.C. right now. Can momondo alert me if prices change?

Price alerts on flights to Washington, D.C. from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 36.1 km from Washington, D.C.