This deal has expired.
It was found on June 13, 2026. Typical price for this route is $367. Fares like this come and go fast. Get the next one by email below.
Past deal
St. Louis to Philadelphia
$277$36725% off
Round trip
East Coast calling! Frontier flights from St. Louis to Philadelphia just $277 - over 40% savings for your Liberty Bell adventure.
Travel dates
Aug 4 to Aug 13
Date options
6 at this price
Lowest we've seen
$136
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