Washington (IAD) to St Louis (STL) flights
Nonstop from Washington Dulles International to St. Louis Lambert International Airport: distance, flying time, which airlines fly it and how often.
Distance
1,118km
695 mi, great circle
Flying time
2h 08m
typical, gate to gate
Flights a day
2.4
average, November 2026
Airlines
1
passenger airlines
Airlines flying IAD to STL
Route map
The shortest path over the Earth's surface. Actual tracks vary with winds and airspace. Map © OpenStreetMap contributors.
Cheapest recent fare
Fares found in recent searches load here. You can also compare IAD to STL fares by month.
Both directions
- St. Louis Lambert International Airport (STL) · we don't have STL's route list yet
- All nonstop routes from Washington (IAD)
- IAD to STL on the flight-path tool
Frequently asked questions
How long is the flight from Washington to St Louis?
About 2h 08m gate to gate for the 1,118 km (695 mile) trip, estimated from distance. Schedules vary by airline and season, and winds can add or save time.
Which airlines fly nonstop from IAD to STL?
United Airlines, with about 2.4 flights a day between them in our data (AeroDataBox, November 2026).