AS637
AS637 (Alaska Airlines) flies Phoenix to Seattle. Of 596 departures recorded from October 2024 to July 2026, 86.3% left on time, according to the US BTS.
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 30 | 31 | ▲ 3.3% |
| February | 28 | 28 | 0.0% |
| March | 25 | 31 | ▲ 24.0% |
| April | 24 | 30 | ▲ 25.0% |
| May | 12 | 31 | ▲ 158.3% |
| June | 19 | 30 | ▲ 57.9% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 29 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 169 | 212 | ▲ 25.4% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 86.7% | 93.6% | ▲ 7.9% |
| February | 69.2% | 96.4% | ▲ 39.3% |
| March | 68.0% | 76.7% | ▲ 12.8% |
| April | 91.7% | 83.3% | ▼ 9.1% |
| May | 58.3% | 100.0% | ▲ 71.4% |
| June | 89.5% | 86.7% | ▼ 3.1% |
| July | 90.3% | 83.9% | ▼ 7.1% |
| August | 86.7% | – | – |
| September | 89.7% | – | – |
| October | 90.3% | – | in progress |
| November | 83.3% | – | – |
| December | 90.3% | – | – |
| Year-to-date average (Jan–Jul) | 79.1% | 88.6% | ▲ 12.1% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 2 | 0 | ▼ 100.0% |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 1 | ▼ 50.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
Cancellation share
- Not cancelled 99.3% 592
- Cancelled 0.7% 4
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHX SEA Phoenix Sky Harbor International Airport – Seattle–Tacoma International Airport | 1,782 | 6.6 min | 86.3% | 596 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 18 | 18 | 88.9% | 0 |
| November 2024 | 18 | 18 | 88.9% | 0 |
| December 2024 | 27 | 27 | 88.9% | 0 |
| January 2025 | 30 | 30 | 86.7% | 0 |
| February 2025 | 28 | 26 | 69.2% | 2 |
| March 2025 | 25 | 25 | 68.0% | 0 |
| April 2025 | 24 | 24 | 91.7% | 0 |
| May 2025 | 12 | 12 | 58.3% | 0 |
| June 2025 | 19 | 19 | 89.5% | 0 |
| July 2025 | 31 | 31 | 90.3% | 0 |
| August 2025 | 31 | 30 | 86.7% | 1 |
| September 2025 | 29 | 29 | 89.7% | 0 |
| October 2025 | 31 | 31 | 90.3% | 0 |
| November 2025 | 30 | 30 | 83.3% | 0 |
| December 2025 | 31 | 31 | 90.3% | 0 |
| January 2026 | 31 | 31 | 93.6% | 0 |
| February 2026 | 28 | 28 | 96.4% | 0 |
| March 2026 | 31 | 30 | 76.7% | 1 |
| April 2026 | 30 | 30 | 83.3% | 0 |
| May 2026 | 31 | 31 | 100.0% | 0 |
| June 2026 | 30 | 30 | 86.7% | 0 |
| July 2026 | 31 | 31 | 83.9% | 0 |