Deal found on July 7, 2026
St. Louis to Philadelphia
$270$36726% off
Round trip
Philadelphia is running $270 round trip from St. Louis on Frontier, 44% below the usual price for this route. It is a one-stop itinerary, but the discount makes the extra connection worth it. Philly's food scene and historic district are an easy add for a fall city break.
Travel dates
Aug 4 to Aug 13
Date options
4 at this price
Lowest we've seen
$136
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