Deal found on July 30, 2026
St. Louis to Denver
$82$35777% off
Round trip
Frontier is flying nonstop from St. Louis to Denver for $82, about 61% below what this route usually runs. That is only $26 above the cheapest fare we have ever tracked here, out of 328 data points, so this is about as good as STL-DEN gets. Easy mountain access for the price of a nice dinner out.
Travel dates
Dates in September
e.g. Sep 9 – Sep 18 · 9 nights
Date options
8 at this price
Lowest we've seen
$56
Get deals like this from St. Louis
Free email alerts when we find a fare worth booking. No spam.