Seattle / Tacoma (SEA) to St. Louis (STL) flight deal in economy from $64

Southwest AirlinesWNSouthwest Airlines
One Way•Economy
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
United StatesSTL

Lambert-Saint Louis International Airport

St. Louis, United States
$174 USD
-63%$64 USD
Verified about 8 hours ago
Limited Availability
13% of dates checked are available within 10% of the lowest price

Monday, June 29th, 2026

No flight details available for this date.