Saint Louis (STL) to Washington (DCA) flights
2 airlines fly nonstop from Saint Louis (STL) to Washington (DCA): American Airlines and Southwest Airlines. The two airports are 718 miles (1,155 km) apart. American Airlines is in oneworld. There are also 30 ways to fly it with one stop, through Columbus, Pittsburgh and Cleveland and more.
Airlines flying nonstop from STL to DCA
- American Airlinesoneworld · bookable with 9 programsWho books it
- Southwest AirlinesNot in an allianceWho books it
Book STL to DCA with points
Loyalty programs that can book at least one of the nonstop airlines, from the Award Booking Guide.
- Alaska Atmos RewardsBooks American Airlines
- American AAdvantageBooks American Airlines
- British Airways ClubBooks American Airlines
- Cathay Pacific Asia MilesBooks American Airlines
- Finnair PlusBooks American Airlines
- Iberia ClubBooks American Airlines
- JAL Mileage BankBooks American Airlines
- Qantas Frequent FlyerBooks American Airlines
- Qatar Airways Privilege ClubBooks American Airlines
STL to DCA with one stop
30 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Columbus (CMH)Southwest Airlines the whole way
- Via Pittsburgh (PIT)Southwest Airlines, then American Airlines
- Via Cleveland (CLE)Southwest Airlines, then American Airlines
- Via Nashville (BNA)Southwest Airlines the whole way
- Via Detroit (DTW)Delta Air Lines the whole way
- Via Chicago (MDW)Southwest Airlines the whole way
- Via Chicago (ORD)American Airlines and United Airlines the whole way
- Via Raleigh/Durham (RDU)Southwest Airlines, then American Airlines and Delta Air Lines
- Via Charlotte (CLT)American Airlines the whole way
- Via Norfolk (ORF)Southwest Airlines, then American Airlines
- Via Philadelphia (PHL)American Airlines the whole way
- Via Milwaukee (MKE)Southwest Airlines the whole way
- Via Toronto (YYZ)Air Canada the whole way
- Via Atlanta (ATL)Delta Air Lines and Southwest Airlines the whole way
- Via New York (EWR)United Airlines the whole way
STL to DCA: common questions
Which airlines fly nonstop from STL to DCA?
American Airlines (oneworld) and Southwest Airlines fly nonstop from Saint Louis (STL) to Washington (DCA).
How far is Saint Louis from Washington by plane?
Saint Louis (STL) and Washington (DCA) are 718 miles (1,155 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book STL to DCA award flights?
9 programs can book at least one of the nonstop airlines: Alaska Atmos Rewards, American AAdvantage, British Airways Club, Cathay Pacific Asia Miles, Finnair Plus, Iberia Club, JAL Mileage Bank, Qantas Frequent Flyer and 1 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does STL to DCA cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for STL to DCA with taxes and fees.
Where can I connect between Saint Louis and Washington?
The most direct connections are through Columbus (CMH), Pittsburgh (PIT), Cleveland (CLE), Nashville (BNA) and Detroit (DTW). On 19 of them the same airline flies both flights, for example Southwest Airlines through Columbus.
More routes
Routes are scheduled nonstop flights. The route data is refreshed monthly; this list was last checked November 11, 2026. Seasonal routes and new launches can be missing or end early, so confirm with the airline before you book. Distances are great-circle, the shortest path between the two airports.