Nonstop route
Denver to St. Louis nonstop
Yes — Southwest, United and Frontier fly DEN to STL nonstop year-round — about 12× daily.
DENDenver
✈
STLSt. Louis
12× daily82.4 flights a week
Year-round82.4/wk Jun vs 56.5/wk Jan
$125–$250typical one-way · median $175
770miles nonstop
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Fares are what people actually paid: half of the 4,839 tickets in the US DOT fare survey for this route sold between $125 and $250 one way, median $175. 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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