AS1166
AS1166 (Alaska Airlines) is a multi-stop service on 2 routes, busiest Seattle to San Francisco. Of 437 departures recorded from October 2024 to May 2026, 76.4% left on time, according to the US BTS.
- On-time departures76.4%of 437 flights
- Average delay11.4 min
- May 202612▼ 61.3%vs May 2025
- Cancelled3.0%
- Legs flown under this number2
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 29 | 30 | ▲ 3.4% |
| February | 22 | 28 | ▲ 27.3% |
| March | 16 | 31 | ▲ 93.8% |
| April | 17 | 30 | ▲ 76.5% |
| May | 31 | 12 | ▼ 61.3% |
| June | 30 | – | – |
| July | 31 | – | – |
| August | 27 | – | – |
| September | 26 | – | – |
| October | 25 | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year to date (Jan–May) | 115 | 131 | ▲ 13.9% |
according to the US BTS · October 2024 → May 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 65.5% | 73.3% | ▲ 11.9% |
| February | 72.2% | 78.6% | ▲ 8.8% |
| March | 73.3% | 74.2% | ▲ 1.2% |
| April | 68.8% | 80.0% | ▲ 16.4% |
| May | 83.3% | 66.7% | ▼ 20.0% |
| June | 86.2% | – | – |
| July | 64.3% | – | – |
| August | 88.9% | – | – |
| September | 80.0% | – | – |
| October | 76.0% | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year-to-date average (Jan–May) | 72.6% | 74.6% | ▲ 2.6% |
according to the US BTS · October 2024 → May 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → May 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 4 | 0 | ▼ 100.0% |
| March | 1 | 0 | ▼ 100.0% |
| April | 1 | 0 | ▼ 100.0% |
| May | 1 | 0 | ▼ 100.0% |
| June | 1 | – | – |
| July | 3 | – | – |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year to date (Jan–May) | 7 | 0 | ▼ 100.0% |
according to the US BTS · October 2024 → May 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 97.0% 424
- Cancelled 3.0% 13
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → May 12, 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 |
|---|---|---|---|---|
| SEA SFO Seattle–Tacoma International Airport – San Francisco International Airport | 1,093 | 11.5 min | 76.8% | 306 |
| HNL OGG Daniel K. Inouye International Airport – Kahului International Airport | 162 | 11.2 min | 75.6% | 131 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 14 | 14 | 92.9% | 0 |
| November 2024 | 18 | 17 | 76.5% | 1 |
| December 2024 | 20 | 20 | 70.0% | 0 |
| January 2025 | 29 | 29 | 65.5% | 0 |
| February 2025 | 22 | 18 | 72.2% | 4 |
| March 2025 | 16 | 15 | 73.3% | 1 |
| April 2025 | 17 | 16 | 68.8% | 1 |
| May 2025 | 31 | 30 | 83.3% | 1 |
| June 2025 | 30 | 29 | 86.2% | 1 |
| July 2025 | 31 | 28 | 64.3% | 3 |
| August 2025 | 27 | 27 | 88.9% | 0 |
| September 2025 | 26 | 25 | 80.0% | 1 |
| October 2025 | 25 | 25 | 76.0% | 0 |
| January 2026 | 30 | 30 | 73.3% | 0 |
| February 2026 | 28 | 28 | 78.6% | 0 |
| March 2026 | 31 | 31 | 74.2% | 0 |
| April 2026 | 30 | 30 | 80.0% | 0 |
| May 2026 | 12 | 12 | 66.7% | 0 |