AS821
AS821 (Alaska Airlines) is a multi-stop service on 3 routes, busiest San Diego to Lihue. Of 398 departures recorded from November 2024 to July 2026, 83.2% left on time, according to the US BTS.
- On-time departures83.2%of 398 flights
- Average delay11.8 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.5%
- Legs flown under this number3
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 8 | 31 | ▲ 287.5% |
| February | 4 | 28 | ▲ 600.0% |
| March | 14 | 31 | ▲ 121.4% |
| April | 27 | 27 | 0.0% |
| May | 30 | 28 | ▼ 6.7% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 21 | – | – |
| September | 4 | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year to date (Jan–Jul) | 144 | 206 | ▲ 43.1% |
according to the US BTS · November 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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 71.4% | 71.0% | ▼ 0.6% |
| February | 75.0% | 67.9% | ▼ 9.5% |
| March | 92.9% | 80.7% | ▼ 13.1% |
| April | 85.2% | 81.5% | ▼ 4.4% |
| May | 96.6% | 88.9% | ▼ 7.9% |
| June | 80.0% | 86.7% | ▲ 8.3% |
| July | 90.0% | 90.0% | 0.0% |
| August | 65.0% | – | – |
| September | 100.0% | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year-to-date average (Jan–Jul) | 84.4% | 80.9% | ▼ 4.1% |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 1 | 0.0% |
| June | 0 | 0 | – |
| July | 1 | 1 | 0.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year to date (Jan–Jul) | 3 | 2 | ▼ 33.3% |
according to the US BTS · November 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 98.5% 392
- Cancelled 1.5% 6
Share of all recorded flights in the period, all legs. · Nov 22, 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 |
|---|---|---|---|---|
| SAN LIH San Diego International Airport – Lihue Airport | 4,300 | 8.4 min | 85.6% | 192 |
| SEA HNL Seattle–Tacoma International Airport – Daniel K. Inouye International Airport | 4,308 | 13.9 min | 81.1% | 191 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 8 | 8 | 87.5% | 0 |
| December 2024 | 15 | 15 | 93.3% | 0 |
| January 2025 | 8 | 7 | 71.4% | 1 |
| February 2025 | 4 | 4 | 75.0% | 0 |
| March 2025 | 14 | 14 | 92.9% | 0 |
| April 2025 | 27 | 27 | 85.2% | 0 |
| May 2025 | 30 | 29 | 96.6% | 1 |
| June 2025 | 30 | 30 | 80.0% | 0 |
| July 2025 | 31 | 30 | 90.0% | 1 |
| August 2025 | 21 | 20 | 65.0% | 1 |
| September 2025 | 4 | 4 | 100.0% | 0 |
| January 2026 | 31 | 31 | 71.0% | 0 |
| February 2026 | 28 | 28 | 67.9% | 0 |
| March 2026 | 31 | 31 | 80.7% | 0 |
| April 2026 | 27 | 27 | 81.5% | 0 |
| May 2026 | 28 | 27 | 88.9% | 1 |
| June 2026 | 30 | 30 | 86.7% | 0 |
| July 2026 | 31 | 30 | 90.0% | 1 |