Deal found on October 24, 2026
St. Louis to Denver
$84$35776% off
Round trip
Nonstop Frontier fares from St. Louis to Denver just fell to $84, about 77% below the usual $368 price tag on this route. That's one of the steepest discounts we've seen this week, part of a wider Frontier sale hitting multiple cities. With Colorado's ski resorts opening for the season, this is a cheap way to get to the mountains this winter.
Travel dates
Dates in November
e.g. Nov 18 – Nov 27 · 9 nights
Date options
14 at this price
Lowest we've seen
$56
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