AS173
AS173 (Alaska Airlines) is a multi-stop service on 6 routes, busiest Seattle to Anchorage. Of 459 departures recorded from October 2024 to April 2026, 84.3% left on time, according to the US BTS.
- On-time departures84.3%of 459 flights
- Average delay5.4 min
- April 202621▼ 8.7%vs April 2025
- Cancelled2.6%
- Legs flown under this number6
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 19 | 31 | ▲ 63.2% |
| February | 15 | 28 | ▲ 86.7% |
| March | 21 | 30 | ▲ 42.9% |
| April | 23 | 21 | ▼ 8.7% |
| May | 27 | – | – |
| June | 29 | – | – |
| July | 31 | – | – |
| August | 27 | – | – |
| September | 30 | – | – |
| October | 27 | – | in progress |
| November | 27 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Apr) | 78 | 110 | ▲ 41.0% |
according to the US BTS · October 2024 → April 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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 79.0% | 80.7% | ▲ 2.2% |
| February | 64.3% | 78.6% | ▲ 22.2% |
| March | 76.2% | 73.3% | ▼ 3.8% |
| April | 73.9% | 85.7% | ▲ 16.0% |
| May | 85.2% | – | – |
| June | 72.4% | – | – |
| July | 92.3% | – | – |
| August | 95.8% | – | – |
| September | 100.0% | – | – |
| October | 96.2% | – | in progress |
| November | 96.3% | – | – |
| December | 72.4% | – | – |
| Year-to-date average (Jan–Apr) | 73.3% | 79.6% | ▲ 8.5% |
according to the US BTS · October 2024 → April 2026
Average departure delay by month
according to the US BTS · October 2024 → April 2026
Cancelled departures by month
The most recent periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | 0 | – | – |
| July | 5 | – | – |
| August | 3 | – | – |
| September | 1 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Apr) | 1 | 0 | ▼ 100.0% |
according to the US BTS · October 2024 → April 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 97.4% 447
- Cancelled 2.6% 12
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Apr 21, 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 ANC Seattle–Tacoma International Airport – Ted Stevens Anchorage International Airport | 2,326 | -0.4 min | 92.6% | 173 |
| SEA SMF Seattle–Tacoma International Airport – Sacramento International Airport | 975 | 10.2 min | 73.7% | 96 |
| SEA PSP Seattle–Tacoma International Airport – Palm Springs International Airport | 1,590 | 10.3 min | 78.3% | 69 |
| SEA SNA Seattle–Tacoma International Airport – John Wayne Orange County International Airport | 1,576 | 5.2 min | 82.1% | 68 |
| FAI ANC Fairbanks International Airport – Ted Stevens Anchorage International Airport | 418 | 13.8 min | 82.9% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 6 | 6 | 100.0% | 0 |
| November 2024 | 15 | 14 | 100.0% | 1 |
| December 2024 | 23 | 23 | 91.3% | 0 |
| January 2025 | 19 | 19 | 79.0% | 0 |
| February 2025 | 15 | 14 | 64.3% | 1 |
| March 2025 | 21 | 21 | 76.2% | 0 |
| April 2025 | 23 | 23 | 73.9% | 0 |
| May 2025 | 27 | 27 | 85.2% | 0 |
| June 2025 | 29 | 29 | 72.4% | 0 |
| July 2025 | 31 | 26 | 92.3% | 5 |
| August 2025 | 27 | 24 | 95.8% | 3 |
| September 2025 | 30 | 29 | 100.0% | 1 |
| October 2025 | 27 | 26 | 96.2% | 1 |
| November 2025 | 27 | 27 | 96.3% | 0 |
| December 2025 | 29 | 29 | 72.4% | 0 |
| January 2026 | 31 | 31 | 80.7% | 0 |
| February 2026 | 28 | 28 | 78.6% | 0 |
| March 2026 | 30 | 30 | 73.3% | 0 |
| April 2026 | 21 | 21 | 85.7% | 0 |