Deal found on September 30, 2026
St. Louis to Grand Canyon National Park
$70$30777% off
Round trip
Frontier has STL to Phoenix down to $70, 82% off the usual $396 fare and even below the lowest price we have ever recorded on this route, so it is worth a quick double check on fare rules before booking. Desert hikes, spring-training energy, and easy day trips to Sedona make Phoenix a fun warm-weather escape, with this fare open for select fall dates.
Travel dates
October into November
e.g. Oct 26 – Nov 4 · 9 nights
Date options
4 at this price
Lowest we've seen
$70
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