Nonstop flights from Washington to St. Louis
United Airlines flies this route twice a day.
IADWashington Dulles International
695 mi · 14 flights a week
STLSt. Louis Lambert International
When they leave
Washington time8:25a5:45pFirst departure 8:25 AM, last 5:45 PM
One morning flight at 8:25 AM, then one evening flight at 5:45 PM. Every flight runs daily.
Every flight
Earliest first
Schedules last checked Sep 22, 2026. Times are local.
Flying from Washington to St. Louis
United Airlines is the only airline flying nonstop from Washington to St. Louis, twice a day on the CRJ 700.
The first arrival in St. Louis is at 9:39 AM and the last at 7:11 PM. The flight covers 695 miles.
Flying back, St. Louis to Washington has 14 nonstop flights a week. Ronald Reagan Washington National (DCA) and Baltimore (BWI) also have nonstop flights to St. Louis, 45 and 27 a week.
Return flights
Every Washington airport
More from Washington
Find the cheapest day to fly from Washington to St. Louis.
Schedules as of Oct 9, 2026.