Nonstop flights from Seattle to St. Louis
Alaska Airlines flies this route 2 to 3 times a day.
SEASeattle-Tacoma International
1,705 mi · 20 flights a week
STLSt. Louis Lambert International
When they leave
Seattle time7:55a6:04pFirst departure 7:55 AM, last 6:04 PM
Two in the morning, 7:55 AM to 8:05 AM, then two in the afternoon, 12:42 PM to 1:06 PM, then two in the evening, 6:03 PM to 6:04 PM.
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Schedules last checked Sep 19, 2026. Times are local.
Flying from Seattle to St. Louis
Alaska Airlines is the only airline flying nonstop from Seattle to St. Louis, 2 to 3 times a day on the Boeing 737 and Boeing 737 MAX 9.
There are 2 or 3 flights every day of the week. The first arrival in St. Louis is at 1:52 PM and the last at 11:59 PM. The flight covers 1,705 miles.
Southwest Airlines stopped flying it after Sep 28.
Flying back, St. Louis to Seattle has 19 nonstop flights a week.
Return flights
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Find the cheapest day to fly from Seattle to St. Louis.
Schedules as of Oct 9, 2026.