Deal found on November 4, 2026
St. Louis to Denver
$88$28869% off
Round trip
Still available: We last sent this Denver nonstop on Oct 24 at $84, and it's holding at just $88 now. Frontier's fares here usually run $158, with a typical range of $158 to $367, and there are 13 separate date windows open from November 2026 through March 2027. Denver stays one of the easiest nonstop gateways to the Rockies right from St. Louis.
Travel dates
Dates in December
e.g. Dec 5 – Dec 14 · 9 nights
Date options
13 at this price
Lowest we've seen
$56
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