AS423
AS423 (Alaska Airlines) is a multi-stop service on 8 routes, busiest Seattle to San Antonio. Of 249 departures recorded from October 2024 to July 2026, 80.2% left on time, according to the US BTS.
- On-time departures80.2%of 249 flights
- Average delay10.6 min
- July 202631▲ 3.3%vs July 2025
- Cancelled0.8%
- Legs flown under this number8
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 | 1 | 4 | ▲ 300.0% |
| February | – | 2 | – |
| March | – | 14 | – |
| April | 9 | 21 | ▲ 133.3% |
| May | 30 | – | – |
| June | 30 | 21 | ▼ 30.0% |
| July | 30 | 31 | ▲ 3.3% |
| August | 19 | – | – |
| September | – | – | – |
| October | 3 | – | in progress |
| November | 11 | – | – |
| December | 9 | – | – |
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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 100.0% | 0.0% |
| February | – | 100.0% | – |
| March | – | 71.4% | – |
| April | 88.9% | 85.7% | ▼ 3.6% |
| May | 73.3% | – | – |
| June | 66.7% | 95.2% | ▲ 42.9% |
| July | 75.9% | 96.8% | ▲ 27.6% |
| August | 66.7% | – | – |
| September | – | – | – |
| October | 66.7% | – | in progress |
| November | 100.0% | – | – |
| December | 88.9% | – | – |
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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | – | 0 | – |
| March | – | 0 | – |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 1 | – | – |
| September | – | – | – |
| October | 0 | – | 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% 247
- Cancelled 0.8% 2
Share of all recorded flights in the period, all legs. · Oct 27, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SEA SAT Seattle–Tacoma International Airport – San Antonio International Airport | 2,854 | 9.2 min | 80.9% | 112 |
| BOI SEA Boise Air Terminal/Gowen Field – Seattle–Tacoma International Airport | 641 | -2.8 min | 96.2% | 52 |
| SEA PHX Seattle–Tacoma International Airport – Phoenix Sky Harbor International Airport | 1,782 | 15.3 min | 80.0% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 66.7% | 0 |
| November 2024 | 11 | 11 | 54.6% | 0 |
| January 2025 | 1 | 1 | 100.0% | 0 |
| April 2025 | 9 | 9 | 88.9% | 0 |
| May 2025 | 30 | 30 | 73.3% | 0 |
| June 2025 | 30 | 30 | 66.7% | 0 |
| July 2025 | 30 | 29 | 75.9% | 1 |
| August 2025 | 19 | 18 | 66.7% | 1 |
| October 2025 | 3 | 3 | 66.7% | 0 |
| November 2025 | 11 | 11 | 100.0% | 0 |
| December 2025 | 9 | 9 | 88.9% | 0 |
| January 2026 | 4 | 4 | 100.0% | 0 |
| February 2026 | 2 | 2 | 100.0% | 0 |
| March 2026 | 14 | 14 | 71.4% | 0 |
| April 2026 | 21 | 21 | 85.7% | 0 |
| June 2026 | 21 | 21 | 95.2% | 0 |
| July 2026 | 31 | 31 | 96.8% | 0 |