Pittsburgh (PIT) to Seattle (SEA) flights
Alaska Airlines flies nonstop from Pittsburgh International Airport to Seattle-Tacoma International Airport, with about 14 flights a week in July 2026. The 2,125-mile flight takes about 5h 18m gate to gate.
- Distance
- 2,125 mi · 3,420 km
- Flight time
- 5h 18m
- Airlines
- 1
- Seats filled
- 79%
Airlines flying PIT to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 14 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 64,734 | 5h 18m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
PIT to SEA flight schedule
2 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 7:30am and the last at 6:10pm. 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 78Alaska Airlines | 7:30am | 9:49am | 31 | 83% |
| AS 412Alaska Airlines | 6:10pm | 8:30pm | 30 | 68% |
Is PIT to SEA on time?
From September 2025 to August 2026, 74% of 474 flights arrived within 15 minutes of schedule and 1.1% were cancelled. Flights leaving around 8am were the most punctual (92%), those around 6pm the least (62%). Most delay time was caused by late-arriving aircraft (45%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 474 | 74% | 14 min | 1.1% |
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 | 138 | 85% | |
| 8am to 9am | 25 | 92% | |
| 6pm to 7pm | 110 | 62% | |
| 7pm to 8pm | 201 | 71% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 58 | 8,654 | |
| September 2025 | 52 | 6,569 | |
| October 2025 | 33 | 4,296 | |
| November 2025 | 26 | 3,399 | |
| December 2025 | 29 | 4,279 | |
| January 2026 | 21 | 2,641 | |
| February 2026 | 21 | 2,469 | |
| March 2026 | 26 | 3,506 | |
| April 2026 | 30 | 3,960 | |
| May 2026 | 50 | 6,924 | |
| June 2026 | 60 | 8,710 | |
| July 2026 | 61 | 9,327 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.