Deal found on September 26, 2026
St. Louis to Denver
$88$35775% off
Round trip
Denver is $88 round trip nonstop from St. Louis, 75% off the roughly $358 this route usually costs and just above the cheapest fare we've ever tracked here. Frontier has this available for fall and winter dates. Denver is an easy long weekend for hiking, breweries, or an early-season ski trip, and $88 nonstop is about as good as this route gets.
Travel dates
October into November
e.g. Oct 26 – Nov 4 · 9 nights
Date options
5 at this price
Lowest we've seen
$56
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