AS623
AS623 (Alaska Airlines) is a multi-stop service on 6 routes, busiest Seattle to San Diego. Of 354 departures recorded from October 2024 to July 2026, 84.9% left on time, according to the US BTS.
- On-time departures84.9%of 354 flights
- Average delay6.0 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.1%
- Legs flown under this number6
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 | 31 | ▲ 3,000.0% |
| February | – | 28 | – |
| March | – | 27 | – |
| April | 1 | 23 | ▲ 2,200.0% |
| May | – | 29 | – |
| June | 19 | 30 | ▲ 57.9% |
| July | 31 | 31 | 0.0% |
| August | 19 | – | – |
| September | – | – | – |
| October | 6 | – | in progress |
| November | 21 | – | – |
| December | 31 | – | – |
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% | 87.1% | ▼ 12.9% |
| February | – | 82.1% | – |
| March | – | 81.5% | – |
| April | 100.0% | 82.6% | ▼ 17.4% |
| May | – | 75.9% | – |
| June | 100.0% | 93.3% | ▼ 6.7% |
| July | 86.2% | 93.6% | ▲ 8.5% |
| August | 89.5% | – | – |
| September | – | – | – |
| October | 100.0% | – | in progress |
| November | 85.7% | – | – |
| December | 62.1% | – | – |
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 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 | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 2 | – | – |
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 98.9% 350
- Cancelled 1.1% 4
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 SAN Seattle–Tacoma International Airport – San Diego International Airport | 1,692 | 9.1 min | 80.3% | 205 |
| JFK ANC John F. Kennedy International Airport – Ted Stevens Anchorage International Airport | 5,434 | 3.6 min | 91.0% | 69 |
| BNA SEA Nashville International Airport – Seattle–Tacoma International Airport | 3,176 | -0.5 min | 94.2% | 52 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 5 | 5 | 100.0% | 0 |
| November 2024 | 21 | 21 | 81.0% | 0 |
| January 2025 | 1 | 1 | 100.0% | 0 |
| April 2025 | 1 | 1 | 100.0% | 0 |
| June 2025 | 19 | 19 | 100.0% | 0 |
| July 2025 | 31 | 29 | 86.2% | 2 |
| August 2025 | 19 | 19 | 89.5% | 0 |
| October 2025 | 6 | 6 | 100.0% | 0 |
| November 2025 | 21 | 21 | 85.7% | 0 |
| December 2025 | 31 | 29 | 62.1% | 2 |
| January 2026 | 31 | 31 | 87.1% | 0 |
| February 2026 | 28 | 28 | 82.1% | 0 |
| March 2026 | 27 | 27 | 81.5% | 0 |
| April 2026 | 23 | 23 | 82.6% | 0 |
| May 2026 | 29 | 29 | 75.9% | 0 |
| June 2026 | 30 | 30 | 93.3% | 0 |
| July 2026 | 31 | 31 | 93.6% | 0 |