AS642
AS642 (Alaska Airlines) is a multi-stop service on 4 routes, busiest Seattle to Denver. Of 610 departures recorded from October 2024 to July 2026, 73.6% left on time, according to the US BTS.
- On-time departures73.6%of 610 flights
- Average delay11.5 min
- July 202614▼ 53.3%vs July 2025
- Cancelled0.5%
- Legs flown under this number4
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 46 | 29 | ▼ 37.0% |
| February | 56 | 24 | ▼ 57.1% |
| March | 49 | 26 | ▼ 46.9% |
| April | 30 | 26 | ▼ 13.3% |
| May | 46 | 26 | ▼ 43.5% |
| June | 41 | 9 | ▼ 78.0% |
| July | 30 | 14 | ▼ 53.3% |
| August | 18 | – | – |
| September | – | – | – |
| October | 6 | – | in progress |
| November | 29 | – | – |
| December | 19 | – | – |
| Year to date (Jan–Jul) | 298 | 154 | ▼ 48.3% |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 87.0% | 93.1% | ▲ 7.1% |
| February | 75.9% | 83.3% | ▲ 9.7% |
| March | 65.3% | 65.4% | ▲ 0.1% |
| April | 73.3% | 92.3% | ▲ 25.9% |
| May | 80.4% | 80.8% | ▲ 0.4% |
| June | 55.0% | 66.7% | ▲ 21.2% |
| July | 50.0% | 57.1% | ▲ 14.3% |
| August | 38.9% | – | – |
| September | – | – | – |
| October | 50.0% | – | in progress |
| November | 82.8% | – | – |
| December | 52.6% | – | – |
| Year-to-date average (Jan–Jul) | 69.6% | 77.0% | ▲ 10.6% |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 2 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 0 | ▼ 100.0% |
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 99.5% 607
- Cancelled 0.5% 3
Share of all recorded flights in the period, all legs. · Oct 14, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SEA DEN Seattle–Tacoma International Airport – Denver International Airport | 1,645 | 16.0 min | 66.4% | 299 |
| SFO SNA San Francisco International Airport – John Wayne Orange County International Airport | 598 | 6.9 min | 81.8% | 138 |
| SNA SFO John Wayne Orange County International Airport – San Francisco International Airport | 598 | 9.7 min | 76.5% | 137 |
| RNO SEA Reno Tahoe International Airport – Seattle–Tacoma International Airport | 907 | -0.7 min | 91.7% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 12 | 12 | 75.0% | 0 |
| November 2024 | 42 | 42 | 83.3% | 0 |
| December 2024 | 32 | 32 | 84.4% | 0 |
| January 2025 | 46 | 46 | 87.0% | 0 |
| February 2025 | 56 | 54 | 75.9% | 2 |
| March 2025 | 49 | 49 | 65.3% | 0 |
| April 2025 | 30 | 30 | 73.3% | 0 |
| May 2025 | 46 | 46 | 80.4% | 0 |
| June 2025 | 41 | 40 | 55.0% | 1 |
| July 2025 | 30 | 30 | 50.0% | 0 |
| August 2025 | 18 | 18 | 38.9% | 0 |
| October 2025 | 6 | 6 | 50.0% | 0 |
| November 2025 | 29 | 29 | 82.8% | 0 |
| December 2025 | 19 | 19 | 52.6% | 0 |
| January 2026 | 29 | 29 | 93.1% | 0 |
| February 2026 | 24 | 24 | 83.3% | 0 |
| March 2026 | 26 | 26 | 65.4% | 0 |
| April 2026 | 26 | 26 | 92.3% | 0 |
| May 2026 | 26 | 26 | 80.8% | 0 |
| June 2026 | 9 | 9 | 66.7% | 0 |
| July 2026 | 14 | 14 | 57.1% | 0 |