Nonstop flights from St. Louis to Washington
United Airlines flies this route twice a day.
STLSt. Louis Lambert International
695 mi · 14 flights a week · about 2h 10m
IADWashington Dulles International
When they leave
St. Louis time8:00a1:00pFirst departure 8:00 AM, last 1:00 PM
One morning flight at 8:00 AM, then one afternoon flight at 1:00 PM. Every flight runs daily.
Every flight
Earliest first
Schedules last checked Oct 6, 2026. Times are local.
Flying from St. Louis to Washington
United Airlines is the only airline flying nonstop from St. Louis to Washington, twice a day on the CRJ 700 and Embraer 175.
The first arrival in Washington is at 11:10 AM and the last at 4:09 PM. The flight covers 695 miles, and scheduled flight times run from 2h 9m to 2h 10m.
Flying back, Washington to St. Louis has 14 nonstop flights a week. From St. Louis, Ronald Reagan Washington National (DCA) and Baltimore (BWI) are the other Washington area airports with nonstop flights, 45 and 27 a week.
Return flights
Every Washington airport
More from St. Louis
Find the cheapest day to fly from St. Louis to Washington.
Schedules as of Oct 9, 2026.