Flights Philadelphia → Seattle
PHL → SEA
Route overview
The flight route from Philadelphia to Seattle operates with an average on-time performance of 86%, with flights typically experiencing a mean delay of just 5.2 minutes. Over the course of a year, approximately 244 flights are conducted using Airbus A320 and A321 aircraft, serving a busy destination airport that accommodates nearly 52.7 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 Philadelphia (PHL) → Seattle (SEA) route is operated by American Airlines, Alaska Airlines. Across 303 flights monitored in recent months, 83% arrived on time (within 15 min of schedule), with an average delay of 8 minutes. The cancellation rate is 4.29%. FlightGuard's average computed risk is 19.2/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Seattle the average ATFM delay is 2.0 minutes (main cause: atfm). Departing from Philadelphia the average ATFM delay is 2.0 minutes.
Heading to Seattle: what to expect in this direction
Flying from Philadelphia (PHL) to Seattle (SEA) heads north-west for about 3,818 km, a flight time of roughly 5h 12m.
Departures from Philadelphia on this leg cluster in the midday window: about 78% of PHL-SEA flights take off then.
Air-traffic congestion: departing Philadelphia the average ATFM delay is 2.0 min (atfm); arriving into Seattle it is 2.0 min (atfm).
Across 303 tracked PHL-SEA flights, 83% left on time with an average delay of 8 min and a 4.3% 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 PHL-SEA
Airports
Frequently asked questions about PHL-SEA
On the Philadelphia (PHL) -> Seattle (SEA) route, on-time performance is 83% with an average delay of 8 minutes, based on 303 tracked flights.
The cancellation rate on Philadelphia-Seattle is 4.29% across 303 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 Seattle, 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.
