AS633
AS633 (Alaska Airlines) is a multi-stop service on 8 routes, busiest Denver to Seattle. Of 212 departures recorded from April 2025 to July 2026, 72.7% left on time, according to the US BTS.
- On-time departures72.7%of 212 flights
- Average delay12.0 min
- July 202631
- Cancelled1.4%
- 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 periods14 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 18 | – |
| February | – | 23 | – |
| March | – | 16 | – |
| April | 9 | 1 | ▼ 88.9% |
| May | 14 | 19 | ▲ 35.7% |
| June | – | 29 | – |
| July | – | 31 | – |
| August | 10 | – | – |
| September | 27 | – | – |
| October | 3 | – | in progress |
| November | 10 | – | – |
| December | 2 | – | – |
according to the US BTS · April 2025 → 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 periods14 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 55.6% | – |
| February | – | 91.3% | – |
| March | – | 60.0% | – |
| April | 55.6% | 100.0% | ▲ 80.0% |
| May | 64.3% | 63.2% | ▼ 1.8% |
| June | – | 72.4% | – |
| July | – | 64.5% | – |
| August | 70.0% | – | – |
| September | 100.0% | – | – |
| October | 66.7% | – | in progress |
| November | 77.8% | – | – |
| December | 100.0% | – | – |
according to the US BTS · April 2025 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · April 2025 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods14 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | – | 0 | – |
| March | – | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | – | 0 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 1 | – | – |
according to the US BTS · April 2025 → 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 98.6% 209
- Cancelled 1.4% 3
Share of all recorded flights in the period, all legs. · Apr 22, 2025 → 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 |
|---|---|---|---|---|
| DEN SEA Denver International Airport – Seattle–Tacoma International Airport | 1,645 | 11.3 min | 71.4% | 57 |
| SEA SIT Seattle–Tacoma International Airport – Sitka Rocky Gutierrez Airport | 1,384 | 18.1 min | 66.7% | 51 |
| SAN SEA San Diego International Airport – Seattle–Tacoma International Airport | 1,692 | 1.0 min | 90.0% | 40 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| April 2025 | 9 | 9 | 55.6% | 0 |
| May 2025 | 14 | 14 | 64.3% | 0 |
| August 2025 | 10 | 10 | 70.0% | 0 |
| September 2025 | 27 | 27 | 100.0% | 0 |
| October 2025 | 3 | 3 | 66.7% | 0 |
| November 2025 | 10 | 9 | 77.8% | 1 |
| December 2025 | 2 | 1 | 100.0% | 1 |
| January 2026 | 18 | 18 | 55.6% | 0 |
| February 2026 | 23 | 23 | 91.3% | 0 |
| March 2026 | 16 | 15 | 60.0% | 1 |
| April 2026 | 1 | 1 | 100.0% | 0 |
| May 2026 | 19 | 19 | 63.2% | 0 |
| June 2026 | 29 | 29 | 72.4% | 0 |
| July 2026 | 31 | 31 | 64.5% | 0 |