Philadelphia (PHL) to Seattle (SEA) flights
American Airlines, Alaska Airlines, Delta Air Lines fly nonstop from Philadelphia International Airport to Seattle-Tacoma International Airport, with about 40 flights a week in July 2026. The 2,379-mile flight takes about 6h 5m gate to gate.
- Distance
- 2,379 mi · 3,829 km
- Flight time
- 6h 5m
- Airlines
- 3
- Seats filled
- 85%
Airlines flying PHL to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| American Airlines | 19 | Airbus A321, Boeing 737 MAX 8, Boeing 737-800 | 101,124 | 6h 5m |
| Alaska Airlines | 14 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 97,090 | 6h 5m |
| Delta Air Lines | 7 | Airbus A321, Boeing 737-800 | 12,885 | 6h 2m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
PHL to SEA flight schedule
10 flight numbers flew this route in August 2026, 5 of them almost daily. The first usually leaves at 7:02am and the last at 7:35pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| AS 1898Alaska Airlines | 7:02am | 9:53am | 13 | 85% |
| DL 2092Delta Air Lines | 7:05am | 10:01am | 31 | 69% |
| AS 277Alaska Airlines | 7:33am | 10:32am | 18 | 73% |
| AA 2534American Airlines | 8:35am | 11:40am | 4 | 77% |
| AA 2870American Airlines | 8:44am | 11:50am | 27 | 84% |
| AS 443Alaska Airlines | 4:26pm | 7:30pm | 31 | 64% |
| AA 1037American Airlines | 5:45pm | 8:58pm | 20 | 40% |
| AA 2522American Airlines | 6:21pm | 9:35pm | 4 | 52% |
| AA 1823American Airlines | 7:35pm | 10:56pm | 27 | 74% |
| AA 3259American Airlines | 7:35pm | 10:56pm | 4 | 69% |
Is PHL to SEA on time?
From September 2025 to August 2026, 69% of 1,431 flights arrived within 15 minutes of schedule and 1.8% were cancelled. Flights leaving around 8am were the most punctual (80%), those around 6pm the least (63%). Most delay time was caused by air traffic control and airport congestion (43%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| American Airlines | 661 | 71% | 17 min | 2.1% |
| Alaska Airlines | 657 | 68% | 18 min | 1.7% |
| Delta Air Lines | 113 | 69% | 25 min | 0.9% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 7am to 8am | 375 | 72% | |
| 8am to 9am | 175 | 80% | |
| 9am to 10am | 33 | 94% | |
| 4pm to 5pm | 74 | 65% | |
| 6pm to 7pm | 517 | 63% | |
| 7pm to 8pm | 241 | 70% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 134 | 23,225 | |
| September 2025 | 122 | 19,196 | |
| October 2025 | 121 | 17,413 | |
| November 2025 | 87 | 12,226 | |
| December 2025 | 92 | 13,995 | |
| January 2026 | 63 | 8,794 | |
| February 2026 | 53 | 7,151 | |
| March 2026 | 73 | 11,698 | |
| April 2026 | 114 | 16,647 | |
| May 2026 | 156 | 24,643 | |
| June 2026 | 169 | 25,660 | |
| July 2026 | 176 | 30,451 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.