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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

These are some of the best return flight deals from St. Louis to Washington, D.C. that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to Washington, D.C..

Cheap last-minute flights

Planning a quick getaway from St. Louis to Washington, D.C.? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Washington, D.C., so you can enjoy a seamless trip without stopovers.

Cheap bus & train deals from St. Louis to Washington, D.C.

Find recent round-trip train or bus tickets from St. Louis to Washington, D.C..

All round-trip flight deals to Washington, D.C.

The cheapest plane tickets to Washington, D.C. found on KAYAK recently.
STL-DCA
1h 54mdirect
DCA-STL
2h 35mdirect
American Airlines
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STL-IAD
2h 18mdirect
IAD-STL
2h 28mdirect
Avianca
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STL-BWI
2h 00mdirect
BWI-STL
2h 25mdirect
Southwest
Find Deal
STL-IAD
2h 18mdirect
IAD-STL
2h 28mdirect
Copa Airlines
Find Deal
STL-IAD
2h 08mdirect
IAD-STL
2h 23mdirect
Brussels Airlines
Find Deal
STL-IAD
2h 06mdirect
IAD-STL
2h 23mdirect
Lufthansa
Find Deal
STL-IAD
2h 18mdirect
IAD-STL
2h 28mdirect
United Airlines
Find Deal
STL-DCA
1h 54mdirect
American Airlines
Find Deal
STL-IAD
2h 18mdirect
Avianca
Find Deal
STL-BWI
2h 00mdirect
Southwest
Find Deal
STL-IAD
2h 18mdirect
Copa Airlines
Find Deal
STL-IAD
2h 08mdirect
Brussels Airlines
Find Deal
STL-IAD
2h 06mdirect
Lufthansa
Find Deal
STL-IAD
2h 18mdirect
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, February 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 263. If you aren’t able to travel during the month of February, then book flights to Washington, D.C. from St. Louis during November instead. Flights to Washington, D.C. in November, while not as cheap as those in February, still average around R4 373.

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.?

In general, most travellers find the cheapest time to book a flight to Washington, D.C. is about 39 days prior to their departure date, when tickets on average are R6 808. Don’t hesitate to check prices now though, because momondo users recently found tickets for as low as R69 635.

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 December 2024, prices for St. Louis to Washington, D.C. flights are approximately 18% more expensive 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.?


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.