Deal found on July 29, 2026
San Diego to Denver
$66$23672% off
Round trip
Frontier is offering nonstop San Diego to Denver for $66 round trip, down from the usual $179, a 63% discount and one of the lowest Denver fares we've tracked this year. These bargain fares have been popping up through late summer and into fall, making it an easy one to slot into your calendar for a quick mountain getaway.
Travel dates
August into September
e.g. Aug 31 – Sep 9 · 9 nights
Date options
13 at this price
Lowest we've seen
$38
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