AS375
AS375 (Alaska Airlines) is a multi-stop service on 11 routes, busiest Dulles to Seattle. Of 437 departures recorded from October 2024 to July 2026, 81.2% left on time, according to the US BTS.
- On-time departures81.2%of 437 flights
- Average delay9.9 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.6%
- 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 periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 2 | – |
| February | – | 17 | – |
| March | – | 25 | – |
| April | 9 | 20 | ▲ 122.2% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 19 | – | – |
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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 100.0% | – |
| February | – | 94.1% | – |
| March | – | 79.2% | – |
| April | 100.0% | 75.0% | ▼ 25.0% |
| May | 90.3% | 96.8% | ▲ 7.1% |
| June | 65.5% | 86.2% | ▲ 31.6% |
| July | 70.0% | 87.1% | ▲ 24.4% |
| August | 87.1% | – | – |
| September | 86.7% | – | – |
| October | 90.0% | – | in progress |
| November | 83.3% | – | – |
| December | 57.9% | – | – |
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 periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 1 | – |
| February | – | 0 | – |
| March | – | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 1 | 0.0% |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| 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 98.4% 430
- Cancelled 1.6% 7
Share of all recorded flights in the period, all legs. · Oct 14, 2024 → 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 |
|---|---|---|---|---|
| IAD SEA Washington Dulles International Airport – Seattle–Tacoma International Airport | 3,702 | 8.1 min | 83.9% | 207 |
| SEA DEN Seattle–Tacoma International Airport – Denver International Airport | 1,645 | 2.9 min | 88.2% | 52 |
| SEA KOA Seattle–Tacoma International Airport – Ellison Onizuka Kona International Airport at Keāhole | 4,327 | 13.3 min | 68.3% | 42 |
| LAS SFO Harry Reid International Airport – San Francisco International Airport | 665 | 21.5 min | 61.1% | 37 |
| PDX SEA Portland International Airport – Seattle–Tacoma International Airport | 208 | 4.2 min | 87.9% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 9 | 9 | 66.7% | 0 |
| November 2024 | 14 | 13 | 46.2% | 1 |
| December 2024 | 16 | 16 | 68.8% | 0 |
| April 2025 | 9 | 9 | 100.0% | 0 |
| May 2025 | 31 | 31 | 90.3% | 0 |
| June 2025 | 30 | 29 | 65.5% | 1 |
| July 2025 | 31 | 30 | 70.0% | 1 |
| August 2025 | 31 | 31 | 87.1% | 0 |
| September 2025 | 30 | 30 | 86.7% | 0 |
| October 2025 | 31 | 30 | 90.0% | 1 |
| November 2025 | 30 | 30 | 83.3% | 0 |
| December 2025 | 19 | 19 | 57.9% | 0 |
| January 2026 | 2 | 1 | 100.0% | 1 |
| February 2026 | 17 | 17 | 94.1% | 0 |
| March 2026 | 25 | 24 | 79.2% | 1 |
| April 2026 | 20 | 20 | 75.0% | 0 |
| May 2026 | 31 | 31 | 96.8% | 0 |
| June 2026 | 30 | 29 | 86.2% | 1 |
| July 2026 | 31 | 31 | 87.1% | 0 |