Deal found on August 25, 2026
St. Louis to Seattle
$132$25047% off
Round trip
Seattle from St. Louis is priced at just $132 round trip on Southwest, about 47 percent below the roughly $250 this route usually costs and even a touch under the previous record low we'd tracked. Fares are showing for trips over the coming months. It's a rare price for a Pacific Northwest trip, whether that means the mountains, the waterfront, or just a cheap city break.
Travel dates
October into November
e.g. Oct 29 – Nov 7 · 9 nights
Date options
8 at this price
Lowest we've seen
$132
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