Flights from Washington Dulles to St Louis
IADSTL
Washington Dulles International Airport (Dulles, United States) → St. Louis Lambert International Airport (St Louis, United States)
Also known as St Louis.
- Nonstop
- 2h 32m
- Distance
- 1,118 km
- Frequency
- 7×/week
- One-way from
- $102
- Airlines
- United Airlines
Fares by month
One-way, per personLowest fares Aviasales travelers found in recent searches; some may include a connection. Prices change often — tap a month to see live fares.
Weekly schedule
Monday
- UA442708:40→10:122h 32mUnited Airlines
- UA452717:55→19:302h 35mUnited Airlines
Tuesday
- UA442708:40→10:122h 32mUnited Airlines
- UA452717:55→19:302h 35mUnited Airlines
Wednesday
- UA442708:40→10:122h 32mUnited Airlines
- UA452717:55→19:302h 35mUnited Airlines
Thursday
- UA442708:40→10:122h 32mUnited Airlines
- UA452717:55→19:302h 35mUnited Airlines
Friday
- UA442708:40→10:122h 32mUnited Airlines
- UA452717:55→19:302h 35mUnited Airlines
Saturday
- UA442708:40→10:122h 32mUnited Airlines
- UA452717:55→19:302h 35mUnited Airlines
Sunday
- UA442708:40→10:122h 32mUnited Airlines
- UA452717:55→19:302h 35mUnited Airlines
Washington Dulles to St Louis — frequently asked
- How long is the flight from Washington Dulles to St Louis?
- IAD–STL is 2h 32m nonstop, covering 1,118 km (695 mi).
- Which airlines fly nonstop from Washington Dulles to St Louis?
- United Airlines operates this route nonstop.
- How much is a flight from Washington Dulles to St Louis?
- One-way fares on IAD–STL recently started from $102 ($229 nonstop). The lowest recent fare is for travel in November 2026. Fares change daily, so check current prices before booking.
- How often do flights run from Washington Dulles to St Louis?
- The route is served 7 days a week (14 scheduled departures).