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

Choose between American Airlines, United Airlines, or Delta Air Lines to find the best price

Why travel with Kiwi.com?
Best price

100+ million searches a day to find you the best available price.

Unique content

Explore unique options you won’t find anywhere else.

Travel hacks

Discover flight options and prices the airlines don’t want you to see.

Travelers usually depart from St. Louis Lambert International, or St. Louis Union Station when they travel from St. Louis to Washington, D.C.. Book your trip to arrive at Washington Dulles International, Baltimore–Washington International, Ronald Reagan Washington National, Washington, DC - Union Station, or Washington DC - Parking Convention Center DC. The distance between St. Louis and Washington, D.C. is 1118 km. The most popular airlines for this route are American Airlines, United Airlines, Delta Air Lines, Spirit Airlines, and Frontier Airlines. St. Louis and Washington, D.C. have 401 direct flights per week. When you arrive at Washington, D.C., consider visiting National Mall, and Lincoln Memorial.

Weekly direct flights

MondaysTuesdaysWednesdaysThursdaysFridaysSaturdaysSundays
Direct flights7777-56
Fly direct with

American Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.

United Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.

Check-in for a flight from St. Louis to Washington, D.C.

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
American AirlinesAALAAYesNo
United AirlinesUALUAYesNo
Delta Air LinesDALDLYesOpens 24 days before flight
Closes 1 hours before flight
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight

Frequently asked questions

How long does it take to travel from St. Louis to Washington, D.C.?
A one-way nonstop (direct) flight between St. Louis and Washington, D.C. takes around 2.1 hours.
What is the flight distance between St. Louis and Washington, D.C.?
The flight distance between St. Louis and Washington, D.C. is 1118 km.
What airlines offer nonstop (direct) flights between St. Louis and Washington, D.C.?
Several carriers operate flights between St. Louis and Washington, D.C.. Airlines offering nonstop (direct) flights include American Airlines, United Airlines.
What are the most popular routes to and from St. Louis?
Travelers frequently search for route combinations, such as St. Louis and Las Vegas, Los Angeles, Denver, Orlando, Atlanta, Minneapolis, San Diego, San Francisco, London, Phoenix, Seattle, Houston, Sacramento, New York, Cancún, Fort Lauderdale, Oakland, Tampa, Paris, Dallas.
What are the most popular routes to and from Washington, D.C.?
Travelers frequently search for route combinations, such as Washington, D.C. and Denver, San Francisco, Orlando, Los Angeles, Las Vegas, Atlanta, Austin, Salt Lake City, Phoenix, London, Fort Lauderdale, Chicago, San Diego, Houston, Seattle, New Orleans, Boston, Paris, Dallas, Tampa.
What airports are near St. Louis?
The main airport in St. Louis is St. Louis Lambert International. It is also served by St. Louis Lambert International, Central Illinois Regional, General Wayne A. Downing Peoria International, MidAmerica St. Louis, Williamson County Regional, Evansville Regional, Quincy Regional, Abraham Lincoln Capital, Decatur, Columbia Regional.
What airports are near Washington, D.C.?
The main airport in Washington, D.C. is Washington Dulles International. It is also served by Philadelphia International, Norfolk International, Trenton–Mercer, Richmond International, Harrisburg International, Atlantic City International, Lehigh Valley International, Charlottesville–Albemarle, New Castle Airport, Lancaster.
What buses and trains depart from St. Louis?
A number of bus and train companies depart from St. Louis, including Amtrak train.
Is it possible to combine flights, buses, and trains in one itinerary when traveling between St. Louis and Washington, D.C.?
Yes, it's possible to combine different modes of transport between St. Louis and Washington, D.C. thanks to our Virtual Interlining technology. Making use of not only flights but also trains and buses between St. Louis and Washington, D.C. can give rise to new adventures. Read more about how Virtual Interlining works on Kiwi.com Stories.
What is Virtual Interlining and how do I use it?
Which airlines fly between St. Louis and Washington, D.C.?
When's the best time to travel between St. Louis and Washington, D.C.?
What flights operate between St. Louis and Washington, D.C.?
How many airports are there near St. Louis?
How many airports are there near Washington, D.C.?
Is it possible to reach St. Louis by bus or train?
What time do nonstop (direct) flights between St. Louis and Washington, D.C. depart?
What time do nonstop (direct) flights between St. Louis and Washington, D.C. arrive?
What time do flights between St. Louis and Washington, D.C. depart?
What time do flights between St. Louis and Washington, D.C. arrive?

Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.

Explore alternative trips

Flights from St. Louis

Flights to Washington, D.C.

Popular routes

Find the best connection from St. Louis to Washington, D.C.

Search, compare, and book flights, trains, or buses to get there.

Search flights, trains & buses