AS443
AS443 (Alaska Airlines) is a multi-stop service on 2 routes, busiest Philadelphia to Seattle. Of 644 departures recorded from October 2024 to July 2026, 71.8% left on time, according to the US BTS.
- On-time departures71.8%of 644 flights
- Average delay15.2 min
- July 202631▲ 3.3%vs July 2025
- Cancelled2.2%
- Legs flown under this number2
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 28 | 31 | ▲ 10.7% |
| February | 26 | 27 | ▲ 3.8% |
| March | 31 | 31 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 29 | ▼ 3.3% |
| July | 30 | 31 | ▲ 3.3% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 206 | 210 | ▲ 1.9% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 85.7% | 60.0% | ▼ 30.0% |
| February | 77.3% | 85.2% | ▲ 10.2% |
| March | 90.3% | 70.0% | ▼ 22.5% |
| April | 83.3% | 93.1% | ▲ 11.7% |
| May | 67.7% | 50.0% | ▼ 26.2% |
| June | 53.3% | 81.5% | ▲ 52.8% |
| July | 41.4% | 79.3% | ▲ 91.7% |
| August | 71.0% | – | – |
| September | 66.7% | – | – |
| October | 66.7% | – | in progress |
| November | 78.6% | – | – |
| December | 67.7% | – | – |
| Year-to-date average (Jan–Jul) | 71.3% | 74.2% | ▲ 4.0% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 4 | 0 | ▼ 100.0% |
| March | 0 | 1 | – |
| April | 0 | 1 | – |
| May | 0 | 1 | – |
| June | 0 | 2 | – |
| July | 1 | 2 | ▲ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 5 | 8 | ▲ 60.0% |
according to the US BTS · October 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 97.8% 630
- Cancelled 2.2% 14
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHL SEA Philadelphia International Airport – Seattle–Tacoma International Airport | 3,818 | 13.3 min | 73.3% | 616 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 58.8% | 0 |
| November 2024 | 29 | 29 | 93.1% | 0 |
| December 2024 | 31 | 31 | 58.1% | 0 |
| January 2025 | 28 | 28 | 85.7% | 0 |
| February 2025 | 26 | 22 | 77.3% | 4 |
| March 2025 | 31 | 31 | 90.3% | 0 |
| April 2025 | 30 | 30 | 83.3% | 0 |
| May 2025 | 31 | 31 | 67.7% | 0 |
| June 2025 | 30 | 30 | 53.3% | 0 |
| July 2025 | 30 | 29 | 41.4% | 1 |
| August 2025 | 31 | 31 | 71.0% | 0 |
| September 2025 | 30 | 30 | 66.7% | 0 |
| October 2025 | 31 | 30 | 66.7% | 1 |
| November 2025 | 28 | 28 | 78.6% | 0 |
| December 2025 | 31 | 31 | 67.7% | 0 |
| January 2026 | 31 | 30 | 60.0% | 1 |
| February 2026 | 27 | 27 | 85.2% | 0 |
| March 2026 | 31 | 30 | 70.0% | 1 |
| April 2026 | 30 | 29 | 93.1% | 1 |
| May 2026 | 31 | 30 | 50.0% | 1 |
| June 2026 | 29 | 27 | 81.5% | 2 |
| July 2026 | 31 | 29 | 79.3% | 2 |