This deal has expired.
It was found on July 24, 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
$268$36727% off
Round trip
Philadelphia usually costs about $471 from St. Louis, and this fare is down to $268 on Frontier with one stop, a 43 percent discount, with dates open August through November. Philly's museums, food scene, and easy train connections to New York and DC make it a strong value pick this week.
Travel dates
October into November
e.g. Oct 31 – Nov 9 · 9 nights
Date options
15 at this price
Lowest we've seen
$136
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