Nonstop flights from St. Louis to Seattle
Alaska Airlines flies this route 2 to 3 times a day.
STLSt. Louis Lambert International
1,705 mi · 19 flights a week
SEASeattle-Tacoma International
When they leave
St. Louis time6:35a7:56pFirst departure 6:35 AM, last 7:56 PM
One morning flight at 6:35 AM, then two in the afternoon, 2:50 PM to 3:04 PM, then two in the evening, 7:36 PM to 7:56 PM.
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Earliest first
Schedules last checked Sep 21, 2026. Times are local.
Flying from St. Louis to Seattle
Alaska Airlines is the only airline flying nonstop from St. Louis to Seattle, 2 to 3 times a day on the Boeing 737 MAX 9 and Boeing 737.
There are 2 or 3 flights every day of the week. The first arrival in Seattle is at 9:02 AM and the last at 10:24 PM. The flight covers 1,705 miles.
Southwest Airlines stopped flying it after Sep 28.
Flying back, Seattle to St. Louis has 20 nonstop flights a week.
Return flights
More from St. Louis
Find the cheapest day to fly from St. Louis to Seattle.
Schedules as of Oct 9, 2026.