AS501
AS501 (Alaska Airlines) is a multi-stop service on 8 routes, busiest Kansas City to Seattle. Of 342 departures recorded from February 2025 to July 2026, 90.6% left on time, according to the US BTS.
- On-time departures90.6%of 342 flights
- Average delay1.1 min
- July 202630
- Cancelled0.6%
- 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 | – | 31 | – |
| February | 19 | 11 | ▼ 42.1% |
| March | 21 | 15 | ▼ 28.6% |
| April | – | 21 | – |
| May | 31 | 38 | ▲ 22.6% |
| June | 21 | 39 | ▲ 85.7% |
| July | – | 30 | – |
| August | – | – | – |
| September | – | – | – |
| October | 6 | – | in progress |
| November | 29 | – | – |
| December | 30 | – | – |
according to the US BTS · February 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 | – | 93.6% | – |
| February | 89.5% | 100.0% | ▲ 11.8% |
| March | 90.5% | 93.3% | ▲ 3.1% |
| April | – | 100.0% | – |
| May | 90.3% | 100.0% | ▲ 10.7% |
| June | 81.0% | 92.3% | ▲ 14.0% |
| July | – | 73.3% | – |
| August | – | – | – |
| September | – | – | – |
| October | 100.0% | – | in progress |
| November | 93.1% | – | – |
| December | 83.3% | – | – |
according to the US BTS · February 2025 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · February 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 | 0 | – |
| March | 0 | 0 | – |
| April | – | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
according to the US BTS · February 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 99.4% 340
- Cancelled 0.6% 2
Share of all recorded flights in the period, all legs. · Feb 13, 2025 → Jul 31, 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 |
|---|---|---|---|---|
| MCI SEA Kansas City International Airport – Seattle–Tacoma International Airport | 2,391 | 2.6 min | 86.1% | 122 |
| SEA MCI Seattle–Tacoma International Airport – Kansas City International Airport | 2,391 | -1.4 min | 93.5% | 77 |
| SJC SEA Mineta San Jose International Airport – Seattle–Tacoma International Airport | 1,122 | -5.3 min | 97.6% | 42 |
| SEA LAS Seattle–Tacoma International Airport – Harry Reid International Airport | 1,395 | -0.4 min | 97.2% | 36 |
| PDX SNA Portland International Airport – John Wayne Orange County International Airport | 1,385 | -1.2 min | 97.1% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| February 2025 | 19 | 19 | 89.5% | 0 |
| March 2025 | 21 | 21 | 90.5% | 0 |
| May 2025 | 31 | 31 | 90.3% | 0 |
| June 2025 | 21 | 21 | 81.0% | 0 |
| October 2025 | 6 | 5 | 100.0% | 1 |
| November 2025 | 29 | 29 | 93.1% | 0 |
| December 2025 | 30 | 30 | 83.3% | 0 |
| January 2026 | 31 | 31 | 93.6% | 0 |
| February 2026 | 11 | 11 | 100.0% | 0 |
| March 2026 | 15 | 15 | 93.3% | 0 |
| April 2026 | 21 | 20 | 100.0% | 1 |
| May 2026 | 38 | 38 | 100.0% | 0 |
| June 2026 | 39 | 39 | 92.3% | 0 |
| July 2026 | 30 | 30 | 73.3% | 0 |