AS351
AS351 (Alaska Airlines) is a multi-stop service on 3 routes, busiest Dulles to Seattle. Of 593 departures recorded from October 2024 to July 2026, 87.0% left on time, according to the US BTS.
- On-time departures87.0%of 593 flights
- Average delay4.2 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.3%
- Legs flown under this number3
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 26 | 31 | ▲ 19.2% |
| February | 22 | 27 | ▲ 22.7% |
| March | 23 | 31 | ▲ 34.8% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 29 | 30 | ▲ 3.4% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 30 | – | – |
| Year to date (Jan–Jul) | 192 | 211 | ▲ 9.9% |
according to the US BTS · October 2024 → July 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 periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 76.9% | 90.3% | ▲ 17.4% |
| February | 68.2% | 85.2% | ▲ 24.9% |
| March | 87.0% | 87.1% | ▲ 0.2% |
| April | 86.7% | 80.0% | ▼ 7.7% |
| May | 77.4% | 93.6% | ▲ 20.8% |
| June | 89.7% | 76.7% | ▼ 14.5% |
| July | 93.6% | 96.8% | ▲ 3.4% |
| August | 100.0% | – | – |
| September | 93.3% | – | – |
| October | 90.0% | – | in progress |
| November | 89.7% | – | – |
| December | 80.0% | – | – |
| Year-to-date average (Jan–Jul) | 82.8% | 87.1% | ▲ 5.2% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 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% 591
- Cancelled 0.3% 2
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → 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 |
|---|---|---|---|---|
| IAD SEA Washington Dulles International Airport – Seattle–Tacoma International Airport | 3,702 | 4.2 min | 86.7% | 505 |
| ANC AKN Ted Stevens Anchorage International Airport – King Salmon Airport | 463 | 3.0 min | 84.6% | 52 |
| FAI ANC Fairbanks International Airport – Ted Stevens Anchorage International Airport | 418 | 5.9 min | 94.4% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 12 | 12 | 91.7% | 0 |
| November 2024 | 18 | 18 | 100.0% | 0 |
| December 2024 | 8 | 8 | 62.5% | 0 |
| January 2025 | 26 | 26 | 76.9% | 0 |
| February 2025 | 22 | 22 | 68.2% | 0 |
| March 2025 | 23 | 23 | 87.0% | 0 |
| April 2025 | 30 | 30 | 86.7% | 0 |
| May 2025 | 31 | 31 | 77.4% | 0 |
| June 2025 | 29 | 29 | 89.7% | 0 |
| July 2025 | 31 | 31 | 93.6% | 0 |
| August 2025 | 31 | 31 | 100.0% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 31 | 30 | 90.0% | 1 |
| November 2025 | 30 | 29 | 89.7% | 1 |
| December 2025 | 30 | 30 | 80.0% | 0 |
| January 2026 | 31 | 31 | 90.3% | 0 |
| February 2026 | 27 | 27 | 85.2% | 0 |
| March 2026 | 31 | 31 | 87.1% | 0 |
| April 2026 | 30 | 30 | 80.0% | 0 |
| May 2026 | 31 | 31 | 93.6% | 0 |
| June 2026 | 30 | 30 | 76.7% | 0 |
| July 2026 | 31 | 31 | 96.8% | 0 |