AS21
AS21 (Alaska Airlines) flies New York to Seattle. Of 577 departures recorded from October 2024 to July 2026, 84.6% left on time, according to the US BTS.
according to the US BTS · Oct 28, 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 | 11 | 27 | ▲ 145.5% |
| February | 10 | 27 | ▲ 170.0% |
| March | 30 | 31 | ▲ 3.3% |
| April | 29 | 30 | ▲ 3.4% |
| May | 31 | 31 | 0.0% |
| June | 30 | 29 | ▼ 3.3% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 172 | 206 | ▲ 19.8% |
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 | 81.8% | 76.9% | ▼ 6.0% |
| February | 90.0% | 91.3% | ▲ 1.4% |
| March | 75.9% | 83.9% | ▲ 10.6% |
| April | 89.3% | 96.6% | ▲ 8.1% |
| May | 63.3% | 83.9% | ▲ 32.4% |
| June | 71.4% | 82.8% | ▲ 15.9% |
| July | 93.6% | 79.3% | ▼ 15.2% |
| August | 76.7% | – | – |
| September | 89.7% | – | – |
| October | 93.1% | – | in progress |
| November | 93.1% | – | – |
| December | 82.8% | – | – |
| Year-to-date average (Jan–Jul) | 80.8% | 84.9% | ▲ 5.2% |
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 | 1 | – |
| February | 0 | 4 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 1 | 1 | 0.0% |
| May | 1 | 0 | ▼ 100.0% |
| June | 2 | 0 | ▼ 100.0% |
| July | 0 | 2 | – |
| August | 1 | – | – |
| September | 1 | – | – |
| October | 2 | – | in progress |
| November | 0 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 5 | 8 | ▲ 60.0% |
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 96.7% 558
- Cancelled 3.3% 19
Share of all recorded flights in the period, all legs. · Oct 28, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| JFK SEA John F. Kennedy International Airport – Seattle–Tacoma International Airport | 3,887 | 8.9 min | 84.6% | 577 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 100.0% | 0 |
| November 2024 | 29 | 29 | 100.0% | 0 |
| December 2024 | 15 | 15 | 80.0% | 0 |
| January 2025 | 11 | 11 | 81.8% | 0 |
| February 2025 | 10 | 10 | 90.0% | 0 |
| March 2025 | 30 | 29 | 75.9% | 1 |
| April 2025 | 29 | 28 | 89.3% | 1 |
| May 2025 | 31 | 30 | 63.3% | 1 |
| June 2025 | 30 | 28 | 71.4% | 2 |
| July 2025 | 31 | 31 | 93.6% | 0 |
| August 2025 | 31 | 30 | 76.7% | 1 |
| September 2025 | 30 | 29 | 89.7% | 1 |
| October 2025 | 31 | 29 | 93.1% | 2 |
| November 2025 | 29 | 29 | 93.1% | 0 |
| December 2025 | 31 | 29 | 82.8% | 2 |
| January 2026 | 27 | 26 | 76.9% | 1 |
| February 2026 | 27 | 23 | 91.3% | 4 |
| March 2026 | 31 | 31 | 83.9% | 0 |
| April 2026 | 30 | 29 | 96.6% | 1 |
| May 2026 | 31 | 31 | 83.9% | 0 |
| June 2026 | 29 | 29 | 82.8% | 0 |
| July 2026 | 31 | 29 | 79.3% | 2 |