AS1140
AS1140 (Alaska Airlines) is a multi-stop service on 2 routes, busiest Seattle to San Francisco. Of 523 departures recorded from October 2024 to July 2026, 70.0% left on time, according to the US BTS.
- On-time departures70.0%of 523 flights
- Average delay15.8 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.6%
- 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 periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 26 | 31 | ▲ 19.2% |
| February | 27 | 28 | ▲ 3.7% |
| March | 18 | 30 | ▲ 66.7% |
| April | 10 | 30 | ▲ 200.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 29 | – | – |
| September | 28 | – | – |
| October | 18 | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year to date (Jan–Jul) | 173 | 211 | ▲ 22.0% |
according to the US BTS · October 2024 → July 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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 92.3% | 64.5% | ▼ 30.1% |
| February | 59.3% | 71.4% | ▲ 20.5% |
| March | 64.7% | 75.9% | ▲ 17.2% |
| April | 60.0% | 76.7% | ▲ 27.8% |
| May | 64.5% | 90.3% | ▲ 40.0% |
| June | 63.3% | 86.7% | ▲ 36.9% |
| July | 67.7% | 77.4% | ▲ 14.3% |
| August | 58.6% | – | – |
| September | 53.6% | – | – |
| October | 64.7% | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year-to-date average (Jan–Jul) | 67.4% | 77.6% | ▲ 15.1% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year to date (Jan–Jul) | 1 | 1 | 0.0% |
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 99.4% 520
- Cancelled 0.6% 3
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 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 | 18.1 min | 64.8% | 312 |
| OGG KOA Kahului International Airport – Ellison Onizuka Kona International Airport at Keāhole | 135 | 12.5 min | 77.6% | 211 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 68.8% | 0 |
| November 2024 | 25 | 25 | 60.0% | 0 |
| December 2024 | 23 | 23 | 65.2% | 0 |
| January 2025 | 26 | 26 | 92.3% | 0 |
| February 2025 | 27 | 27 | 59.3% | 0 |
| March 2025 | 18 | 17 | 64.7% | 1 |
| April 2025 | 10 | 10 | 60.0% | 0 |
| May 2025 | 31 | 31 | 64.5% | 0 |
| June 2025 | 30 | 30 | 63.3% | 0 |
| July 2025 | 31 | 31 | 67.7% | 0 |
| August 2025 | 29 | 29 | 58.6% | 0 |
| September 2025 | 28 | 28 | 53.6% | 0 |
| October 2025 | 18 | 17 | 64.7% | 1 |
| January 2026 | 31 | 31 | 64.5% | 0 |
| February 2026 | 28 | 28 | 71.4% | 0 |
| March 2026 | 30 | 29 | 75.9% | 1 |
| April 2026 | 30 | 30 | 76.7% | 0 |
| May 2026 | 31 | 31 | 90.3% | 0 |
| June 2026 | 30 | 30 | 86.7% | 0 |
| July 2026 | 31 | 31 | 77.4% | 0 |