Direct flights
from St. Louis (STL)
to Seattle (SEA)
with Alaska Airlines

Weekly schedule for flights between St. Louis Lambert Intl (St. Louis, United States) and Seattle-Tacoma Intl (Seattle, United States).
7 weekly flights operate on this route flying 1,708mi in 4h25min.
Expect $201 in average for a one-way ticket with the cheapest option at $136 on Feb 22.