Saint Louis (STL) to Dulles (IAD) flights
One airline flies nonstop from Saint Louis (STL) to Dulles (IAD): United Airlines. The two airports are 695 miles (1,119 km) apart. United Airlines is in Star Alliance. There are also 24 ways to fly it with one stop, through Columbus, Pittsburgh and Cleveland and more.
Airlines flying nonstop from STL to IAD
- United AirlinesStar Alliance · bookable with 13 programsWho books it
Book STL to IAD with points
Loyalty programs that can book at least one of the nonstop airlines, from the Award Booking Guide.
- Air Canada AeroplanBooks United Airlines
- Air New Zealand AirpointsBooks United Airlines
- ANA Mileage ClubBooks United Airlines
- Avianca LifeMilesBooks United Airlines
- Emirates SkywardsBooks United Airlines
- EVA Air Infinity MileageLandsBooks United Airlines
- JetBlue TrueBlueBooks United Airlines
- Lufthansa Miles & MoreBooks United Airlines
- Singapore Airlines KrisFlyerBooks United Airlines
- TAP Miles&GoBooks United Airlines
- Thai Royal Orchid PlusBooks United Airlines
- Turkish Airlines Miles&SmilesBooks United Airlines
- United MileagePlusBooks United Airlines
STL to IAD with one stop
24 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Columbus (CMH)Southwest Airlines, then United Airlines
- Via Pittsburgh (PIT)Southwest Airlines, then United Airlines
- Via Cleveland (CLE)Southwest Airlines, then United Airlines
- Via Nashville (BNA)Southwest Airlines, then United Airlines
- Via Detroit (DTW)Delta Air Lines the whole way
- Via Chicago (ORD)United Airlines the whole way
- Via Raleigh/Durham (RDU)Southwest Airlines, then United Airlines
- Via Charlotte (CLT)American Airlines the whole way
- Via Norfolk (ORF)Southwest Airlines, then United Airlines
- Via Philadelphia (PHL)American Airlines and Southwest Airlines, then United Airlines
- Via Toronto (YYZ)Air Canada the whole way
- Via Atlanta (ATL)Delta Air Lines and Frontier Airlines the whole way
- Via New York (EWR)United Airlines the whole way
- Via Myrtle Beach (MYR)Southwest Airlines, then United Airlines
- Via New York (LGA)American Airlines, Delta Air Lines and 1 more, then United Airlines
STL to IAD: common questions
Which airlines fly nonstop from STL to IAD?
United Airlines (Star Alliance) flies nonstop from Saint Louis (STL) to Dulles (IAD).
How far is Saint Louis from Dulles by plane?
Saint Louis (STL) and Dulles (IAD) are 695 miles (1,119 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 IAD award flights?
13 programs can book at least one of the nonstop airlines: Air Canada Aeroplan, Air New Zealand Airpoints, ANA Mileage Club, Avianca LifeMiles, Emirates Skywards, EVA Air Infinity MileageLands, JetBlue TrueBlue, Lufthansa Miles & More and 5 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does STL to IAD 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 IAD with taxes and fees.
Where can I connect between Saint Louis and Dulles?
The most direct connections are through Columbus (CMH), Pittsburgh (PIT), Cleveland (CLE), Nashville (BNA) and Detroit (DTW). On 8 of them the same airline flies both flights, for example Delta Air Lines through Detroit.
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.