There are most likely no direct flights on the Saint Louis — Philadelphia route
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A non-stop flight is the most convenient and comfortable way to fly from Saint Louis to Philadelphia, despite the fact that sometimes flights with transfers can cost significantly less.
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There are most likely no direct flights on the Saint Louis — Philadelphia route
Saint Louis — Philadelphia
09/25/2026
Departure
Direct flight
WN1822
starting at $393
Saint Louis — Philadelphia
11/26/2026
Departure
Direct flight
AA5450
starting at $171
starting at $393
starting at $171
starting at $149
Flights from Saint Louis to Philadelphia are operated by several airlines — Southwest Airlines, American Airlines, and Frontier Airlines. This allows passengers to flexibly choose flights based on departure time, cost, and additional services. The minimum ticket price starts at $149, making this destination accessible to travelers with different budgets. We help compare all available options in real time, so you can book tickets at the best value for money. The service ensures transparent search and lets you book affordable flights in just a few clicks.
The cheapest one-way flight from Saint Louis to Philadelphia departs on 11/26/2026, is operated by Frontier Airlines and costs $149
The cheapest roundtrip flight from Saint Louis to Philadelphia departs on 12/11/2026, is operated by Frontier Airlines and costs $256
Fastest flight from Saint Louis to Philadelphia takes 5h 54m
There are direct flights on this route 2 days a week: Th and Fr
The distance between Saint Louis and Philadelphia is 1300km (806 miles). There are 38 direct flights from Saint Louis to Philadelphia. The time difference between Saint Louis and Philadelphia is 1h. Flights from Saint Louis begin at 6:00 AM. The latest flight from Saint Louis departs at 7:35 PM
The cheapest flight ticket from Saint Louis to Philadelphia according to data for the last 48 hours costs $149
Often the best time to buy tickets from Saint Louis to Philadelphia is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Saint Louis to Philadelphia can be found flying in these months: September.
The fastest flights from Saint Louis to Philadelphia start from 5 hours 54 minutes in the air.
The following airlines operate direct flights on the route Saint Louis — Philadelphia: Southwest Airlines, American Airlines
We carefully collect statistics on the search and pricing of airlines and, based on these data, we make an assumption about future prices. Thus, you can better understand which season is the cheapest to fly from Saint Louis to Philadelphia
We couldn't find any special offers for flights from Saint Louis to Philadelphia