Flights Seattle → Philadelphia
SEA → PHL
Route overview
The flight route from Seattle to Philadelphia operates with an average on-time performance of 83%, with flights typically experiencing a mean delay of 7.8 minutes. Over the course of a year, approximately 245 flights are conducted using Airbus A320 and Airbus A321 aircraft, serving a destination airport that handles nearly 28 million 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 Seattle (SEA) → Philadelphia (PHL) route is operated by American Airlines, Alaska Airlines. Across 304 flights monitored in recent months, 80% arrived on time (within 15 min of schedule), with an average delay of 9 minutes. The cancellation rate is 3.95%. FlightGuard's average computed risk is 17.8/100 (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 Seattle the average ATFM delay is 2.0 minutes.
Heading to Philadelphia: what to expect in this direction
Flying from Seattle (SEA) to Philadelphia (PHL) heads east for about 3,818 km, a flight time of roughly 5h 12m.
Departures from Seattle on this leg cluster in the midday window: about 50% of SEA-PHL flights take off then.
Air-traffic congestion: departing Seattle the average ATFM delay is 2.0 min (atfm); arriving into Philadelphia it is 2.0 min (atfm).
Across 304 tracked SEA-PHL flights, 80% left on time with an average delay of 9 min and a 4.0% 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% |
| Alaska Airlines (AS) | 67% | 10 min | 11.9% |
Airlines operating SEA-PHL
Airports
Frequently asked questions about SEA-PHL
On the Seattle (SEA) -> Philadelphia (PHL) route, on-time performance is 80% with an average delay of 9 minutes, based on 304 tracked flights.
The cancellation rate on Seattle-Philadelphia is 3.95% across 304 monitored flights.
The route is operated by 2 airlines: American Airlines, Alaska 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.
