AS399
AS399 (Alaska Airlines) is a multi-stop service on 3 routes, busiest San Diego to Portland. Of 548 departures recorded from October 2024 to July 2026, 85.6% left on time, according to the US BTS.
- On-time departures85.6%of 548 flights
- Average delay6.9 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.1%
- Legs flown under this number3
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 31 | 6 | ▼ 80.6% |
| February | 28 | 17 | ▼ 39.3% |
| March | 17 | 31 | ▲ 82.4% |
| April | 9 | 30 | ▲ 233.3% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 10 | – | in progress |
| November | 26 | – | – |
| December | 28 | – | – |
| Year to date (Jan–Jul) | 177 | 176 | ▼ 0.6% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 77.4% | 100.0% | ▲ 29.2% |
| February | 64.3% | 100.0% | ▲ 55.5% |
| March | 82.4% | 93.6% | ▲ 13.6% |
| April | 77.8% | 93.3% | ▲ 20.0% |
| May | 74.2% | 93.6% | ▲ 26.1% |
| June | 66.7% | 90.0% | ▲ 35.0% |
| July | 96.7% | 93.6% | ▼ 3.2% |
| August | 100.0% | – | – |
| September | 100.0% | – | – |
| October | 87.5% | – | in progress |
| November | 96.2% | – | – |
| December | 96.3% | – | – |
| Year-to-date average (Jan–Jul) | 77.1% | 94.9% | ▲ 23.1% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 2 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 1 | 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 98.9% 542
- Cancelled 1.1% 6
Share of all recorded flights in the period, all legs. · Oct 12, 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 |
|---|---|---|---|---|
| SAN PDX San Diego International Airport – Portland International Airport | 1,503 | -1.1 min | 94.4% | 236 |
| MCO SFO Orlando International Airport – San Francisco International Airport | 3,929 | 20.6 min | 69.4% | 197 |
| IAH SEA George Bush Intercontinental Airport – Seattle–Tacoma International Airport | 3,013 | -0.6 min | 95.6% | 115 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 76.5% | 0 |
| November 2024 | 23 | 22 | 72.7% | 1 |
| December 2024 | 30 | 30 | 56.7% | 0 |
| January 2025 | 31 | 31 | 77.4% | 0 |
| February 2025 | 28 | 28 | 64.3% | 0 |
| March 2025 | 17 | 17 | 82.4% | 0 |
| April 2025 | 9 | 9 | 77.8% | 0 |
| May 2025 | 31 | 31 | 74.2% | 0 |
| June 2025 | 30 | 30 | 66.7% | 0 |
| July 2025 | 31 | 30 | 96.7% | 1 |
| August 2025 | 31 | 30 | 100.0% | 1 |
| September 2025 | 30 | 30 | 100.0% | 0 |
| October 2025 | 10 | 8 | 87.5% | 2 |
| November 2025 | 26 | 26 | 96.2% | 0 |
| December 2025 | 28 | 27 | 96.3% | 1 |
| January 2026 | 6 | 6 | 100.0% | 0 |
| February 2026 | 17 | 17 | 100.0% | 0 |
| March 2026 | 31 | 31 | 93.6% | 0 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 31 | 31 | 93.6% | 0 |
| June 2026 | 30 | 30 | 90.0% | 0 |
| July 2026 | 31 | 31 | 93.6% | 0 |