St. Louis (STL) to Seattle / Tacoma (SEA) flight deal in economy from $177

Delta Air LinesDLDelta Air LinesSouthwest AirlinesWNSouthwest Airlines
Round Trip•Economy
United StatesSTL

Lambert-Saint Louis International Airport

St. Louis, United States
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
$369 USD
-52%$177 USD
Verified about 8 hours ago
Limited Availability
14% of dates checked are available within 10% of the lowest price

Monday, June 29th, 2026

0 round-trip options

No flight details available for this date.