Dulles (IAD) to Saint Louis (STL) flights
One airline flies nonstop from Dulles (IAD) to Saint Louis (STL): 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 IAD to STL
- United AirlinesStar Alliance · bookable with 13 programsWho books it
Book IAD to STL 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
IAD to STL with one stop
24 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Columbus (CMH)United Airlines, then Southwest Airlines
- Via Pittsburgh (PIT)United Airlines, then Southwest Airlines
- Via Cleveland (CLE)United Airlines, then Southwest Airlines
- Via Nashville (BNA)United Airlines, then Southwest Airlines
- Via Detroit (DTW)Delta Air Lines the whole way
- Via Chicago (ORD)United Airlines the whole way
- Via Raleigh/Durham (RDU)United Airlines, then Southwest Airlines
- Via Charlotte (CLT)American Airlines the whole way
- Via Norfolk (ORF)United Airlines, then Southwest Airlines
- Via Philadelphia (PHL)United Airlines, then American Airlines and Southwest 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)United Airlines, then Southwest Airlines
- Via New York (LGA)United Airlines, then American Airlines, Delta Air Lines and 1 more
IAD to STL: common questions
Which airlines fly nonstop from IAD to STL?
United Airlines (Star Alliance) flies nonstop from Dulles (IAD) to Saint Louis (STL).
How far is Dulles from Saint Louis by plane?
Dulles (IAD) and Saint Louis (STL) 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 IAD to STL 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 IAD to STL cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for IAD to STL with taxes and fees.
Where can I connect between Dulles and Saint Louis?
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.