Nonstop route
St Louis to Seattle nonstop
Yes — Alaska and Southwest fly STL to SEA nonstop in the summer season only — about 4× daily.
STLSt Louis
✈
SEASeattle
4× daily27.5 flights a week
Summer only27.5/wk Jun vs 8.4/wk Jan
$175–$325typical one-way · median $250
1,709miles nonstop
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Fares are what people actually paid: half of the 2,331 tickets in the US DOT fare survey for this route sold between $175 and $325 one way, median $250. That survey runs a couple of quarters behind, so treat it as the shape of the route's pricing rather than today's quote.
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