Nonstop route
Seattle to Cincinnati nonstop
Yes — Alaska and Delta fly SEA to CVG nonstop year-round — about daily.
SEASeattle
✈
CVGCincinnati
daily19.1 flights a week
Year-round19.1/wk Jun vs 13.3/wk Jan
$175–$350typical one-way · median $250
1,965miles nonstop
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Fares are what people actually paid: half of the 1,796 tickets in the US DOT fare survey for this route sold between $175 and $350 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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