AS638
AS638 (Alaska Airlines) is a multi-stop service on 5 routes, busiest Seattle to Tucson. Of 254 departures recorded from October 2024 to July 2026, 78.6% left on time, according to the US BTS.
- On-time departures78.6%of 254 flights
- Average delay7.4 min
- July 202630
- Cancelled0.8%
- Legs flown under this number5
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods11 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 26 | ▲ 2,500.0% |
| February | – | 24 | – |
| March | – | 29 | – |
| April | – | 30 | – |
| May | – | 11 | – |
| June | – | 21 | – |
| July | – | 30 | – |
| August | – | – | – |
| September | – | – | – |
| October | 18 | – | in progress |
| November | 29 | – | – |
| December | 23 | – | – |
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 periods11 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 88.5% | ▼ 11.5% |
| February | – | 83.3% | – |
| March | – | 78.6% | – |
| April | – | 93.3% | – |
| May | – | 90.9% | – |
| June | – | 76.2% | – |
| July | – | 63.3% | – |
| August | – | – | – |
| September | – | – | – |
| October | 70.6% | – | in progress |
| November | 75.9% | – | – |
| December | 60.9% | – | – |
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 periods11 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | – | 0 | – |
| March | – | 1 | – |
| April | – | 0 | – |
| May | – | 0 | – |
| June | – | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 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 99.2% 252
- Cancelled 0.8% 2
Share of all recorded flights in the period, all legs. · Oct 29, 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 TUS Seattle–Tacoma International Airport – Tucson International Airport | 1,958 | 6.2 min | 80.3% | 190 |
| SEA SMF Seattle–Tacoma International Airport – Sacramento International Airport | 975 | 14.2 min | 68.6% | 51 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 2 | 2 | 100.0% | 0 |
| November 2024 | 9 | 9 | 88.9% | 0 |
| December 2024 | 1 | 1 | 100.0% | 0 |
| January 2025 | 1 | 1 | 100.0% | 0 |
| October 2025 | 18 | 17 | 70.6% | 1 |
| November 2025 | 29 | 29 | 75.9% | 0 |
| December 2025 | 23 | 23 | 60.9% | 0 |
| January 2026 | 26 | 26 | 88.5% | 0 |
| February 2026 | 24 | 24 | 83.3% | 0 |
| March 2026 | 29 | 28 | 78.6% | 1 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 11 | 11 | 90.9% | 0 |
| June 2026 | 21 | 21 | 76.2% | 0 |
| July 2026 | 30 | 30 | 63.3% | 0 |