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
$145 USD
-61%$57 USD
Verified Dec 1, 2025 at 1:29 AM
Rare Availability
6% of dates checked are available within 10% of the lowest price

Friday, February 27th, 2026

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