AS321
AS321 (Alaska Airlines) is a multi-stop service on 11 routes, busiest Seattle to Denver. Of 330 departures recorded from October 2024 to July 2026, 75.4% left on time, according to the US BTS.
- On-time departures75.4%of 330 flights
- Average delay11.9 min
- July 20264▲ 0.0%vs July 2025
- Cancelled0.3%
- Legs flown under this number11
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 31 | 25 | ▼ 19.4% |
| February | 24 | 24 | 0.0% |
| March | 13 | 25 | ▲ 92.3% |
| April | – | 30 | – |
| May | 17 | 31 | ▲ 82.4% |
| June | 14 | 12 | ▼ 14.3% |
| July | 4 | 4 | 0.0% |
| August | 3 | – | – |
| September | – | – | – |
| October | 1 | – | in progress |
| November | 2 | – | – |
| December | 10 | – | – |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 87.1% | 76.0% | ▼ 12.7% |
| February | 66.7% | 54.2% | ▼ 18.7% |
| March | 84.6% | 64.0% | ▼ 24.4% |
| April | – | 83.3% | – |
| May | 70.6% | 90.3% | ▲ 28.0% |
| June | 64.3% | 83.3% | ▲ 29.6% |
| July | 75.0% | 100.0% | ▲ 33.3% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | 0.0% | – | in progress |
| November | 100.0% | – | – |
| December | 80.0% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | – | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| 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 99.7% 329
- Cancelled 0.3% 1
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 25, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SEA DEN Seattle–Tacoma International Airport – Denver International Airport | 1,645 | 11.2 min | 76.9% | 91 |
| ATL SEA Hartsfield Jackson Atlanta International Airport – Seattle–Tacoma International Airport | 3,505 | 16.0 min | 69.2% | 65 |
| SEA SMF Seattle–Tacoma International Airport – Sacramento International Airport | 975 | 13.0 min | 63.3% | 60 |
| LAX ANC Los Angeles International Airport – Ted Stevens Anchorage International Airport | 3,771 | 2.3 min | 87.8% | 49 |
| ORD SEA Chicago O'Hare International Airport – Seattle–Tacoma International Airport | 2,762 | 22.5 min | 77.1% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 18 | 18 | 88.9% | 0 |
| November 2024 | 20 | 20 | 75.0% | 0 |
| December 2024 | 22 | 22 | 54.6% | 0 |
| January 2025 | 31 | 31 | 87.1% | 0 |
| February 2025 | 24 | 24 | 66.7% | 0 |
| March 2025 | 13 | 13 | 84.6% | 0 |
| May 2025 | 17 | 17 | 70.6% | 0 |
| June 2025 | 14 | 14 | 64.3% | 0 |
| July 2025 | 4 | 4 | 75.0% | 0 |
| August 2025 | 3 | 3 | 100.0% | 0 |
| October 2025 | 1 | 1 | 0.0% | 0 |
| November 2025 | 2 | 1 | 100.0% | 1 |
| December 2025 | 10 | 10 | 80.0% | 0 |
| January 2026 | 25 | 25 | 76.0% | 0 |
| February 2026 | 24 | 24 | 54.2% | 0 |
| March 2026 | 25 | 25 | 64.0% | 0 |
| April 2026 | 30 | 30 | 83.3% | 0 |
| May 2026 | 31 | 31 | 90.3% | 0 |
| June 2026 | 12 | 12 | 83.3% | 0 |
| July 2026 | 4 | 4 | 100.0% | 0 |