AS143
AS143 (Alaska Airlines) is a multi-stop service on 4 routes, busiest Anchorage to Seattle. Of 405 departures recorded from October 2024 to April 2026, 74.4% left on time, according to the US BTS.
- On-time departures74.4%of 405 flights
- Average delay13.0 min
- April 20261▼ 95.2%vs April 2025
- Cancelled0.5%
- Legs flown under this number4
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 31 | 25 | ▼ 19.4% |
| February | 26 | 24 | ▼ 7.7% |
| March | 28 | 15 | ▼ 46.4% |
| April | 21 | 1 | ▼ 95.2% |
| May | 3 | – | – |
| June | 16 | – | – |
| July | 20 | – | – |
| August | 24 | – | – |
| September | 26 | – | – |
| October | 30 | – | in progress |
| November | 23 | – | – |
| December | 27 | – | – |
| Year to date (Jan–Apr) | 106 | 65 | ▼ 38.7% |
according to the US BTS · October 2024 → April 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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 67.7% | 72.0% | ▲ 6.3% |
| February | 65.4% | 87.5% | ▲ 33.8% |
| March | 85.7% | 85.7% | 0.0% |
| April | 85.7% | 0.0% | ▼ 100.0% |
| May | 100.0% | – | – |
| June | 56.3% | – | – |
| July | 60.0% | – | – |
| August | 66.7% | – | – |
| September | 84.6% | – | – |
| October | 76.7% | – | in progress |
| November | 90.9% | – | – |
| December | 66.7% | – | – |
| Year-to-date average (Jan–Apr) | 76.1% | 61.3% | ▼ 19.5% |
according to the US BTS · October 2024 → April 2026
Average departure delay by month
according to the US BTS · October 2024 → April 2026
Cancelled departures by month
The most recent periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | 0 | – | – |
| July | 0 | – | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Apr) | 0 | 1 |
according to the US BTS · October 2024 → April 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 99.5% 403
- Cancelled 0.5% 2
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Apr 28, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ANC SEA Ted Stevens Anchorage International Airport – Seattle–Tacoma International Airport | 2,326 | 14.0 min | 74.9% | 229 |
| SEA ANC Seattle–Tacoma International Airport – Ted Stevens Anchorage International Airport | 2,326 | 11.8 min | 73.7% | 171 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 46.2% | 0 |
| November 2024 | 29 | 29 | 93.1% | 0 |
| December 2024 | 23 | 23 | 56.5% | 0 |
| January 2025 | 31 | 31 | 67.7% | 0 |
| February 2025 | 26 | 26 | 65.4% | 0 |
| March 2025 | 28 | 28 | 85.7% | 0 |
| April 2025 | 21 | 21 | 85.7% | 0 |
| May 2025 | 3 | 3 | 100.0% | 0 |
| June 2025 | 16 | 16 | 56.3% | 0 |
| July 2025 | 20 | 20 | 60.0% | 0 |
| August 2025 | 24 | 24 | 66.7% | 0 |
| September 2025 | 26 | 26 | 84.6% | 0 |
| October 2025 | 30 | 30 | 76.7% | 0 |
| November 2025 | 23 | 22 | 90.9% | 1 |
| December 2025 | 27 | 27 | 66.7% | 0 |
| January 2026 | 25 | 25 | 72.0% | 0 |
| February 2026 | 24 | 24 | 87.5% | 0 |
| March 2026 | 15 | 14 | 85.7% | 1 |
| April 2026 | 1 | 1 | 0.0% | 0 |