Nonstop route
Sioux Falls to Denver nonstop
Yes — United and Frontier fly FSD to DEN nonstop year-round — about 6× daily.
FSDSioux Falls
✈
DENDenver
6× daily42 flights a week
Year-round42/wk Jun vs 29.1/wk Jan
$75–$200typical one-way · median $125
483miles nonstop
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Fares are what people actually paid: half of the 1,001 tickets in the US DOT fare survey for this route sold between $75 and $200 one way, median $125. 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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