Flights St. Louis → Philadelphia
STL → PHL
Route overview
The flight route from St. Louis to Philadelphia operates with an average on-time performance of 79%, with flights typically experiencing a mean delay of 10.8 minutes. Over the course of a year, this route sees around 329 flights using Embraer 175 and 170 aircraft models, serving a destination airport that handles approximately 28,131,972 passengers annually.
Your rights on this US flight (DOT)
US flights have no statutory cash compensation for delays. Under the US DOT rules, if your flight is cancelled or significantly changed and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Amenities for controllable delays depend on each airline's contract of carriage.
US flight refund rules & checker →General information, not legal advice.
The St. Louis (STL) → Philadelphia (PHL) route is operated by American Airlines, Southwest Airlines. Across 401 flights monitored in recent months, 79% arrived on time (within 15 min of schedule), with an average delay of 11 minutes. The cancellation rate is 2.74%. FlightGuard's average computed risk is 21.6/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Philadelphia the average ATFM delay is 2.0 minutes (main cause: atfm). Departing from St. Louis the average ATFM delay is 2.0 minutes.
Heading to Philadelphia: what to expect in this direction
Flying from St. Louis (STL) to Philadelphia (PHL) heads east for about 1,306 km, a flight time of roughly 2h 3m.
Departures from St. Louis on this leg cluster in the overnight window: about 45% of STL-PHL flights take off then.
Air-traffic congestion: departing St. Louis the average ATFM delay is 2.0 min (atfm); arriving into Philadelphia it is 2.0 min (atfm).
Across 401 tracked STL-PHL flights, 79% left on time with an average delay of 11 min and a 2.7% cancellation rate.
Route facts
Flights on this route
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| American Airlines (AA) | 74% | 16 min | 3.0% |
| Southwest Airlines (WN) | 73% | 6 min | 3.1% |
Airlines operating STL-PHL
Airports
Frequently asked questions about STL-PHL
On the St. Louis (STL) -> Philadelphia (PHL) route, on-time performance is 79% with an average delay of 11 minutes, based on 401 tracked flights.
The cancellation rate on St. Louis-Philadelphia is 2.74% across 401 monitored flights.
The route is operated by 2 airlines: American Airlines, Southwest Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at Philadelphia, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
US flights have no statutory cash compensation for delays. Under US DOT rules, if the airline cancels or significantly changes your flight and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Meals or hotels for controllable delays depend on each airline's contract of carriage.
