AS406
AS406 (Alaska Airlines) is a multi-stop service on 7 routes, busiest Seattle to Dulles. Of 682 departures recorded from October 2024 to July 2026, 74.9% left on time, according to the US BTS.
- On-time departures74.9%of 682 flights
- Average delay12.3 min
- July 202631▼ 49.2%vs July 2025
- Cancelled0.7%
- Legs flown under this number7
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 | 36 | 31 | ▼ 13.9% |
| February | 28 | 21 | ▼ 25.0% |
| March | 31 | 11 | ▼ 64.5% |
| April | 29 | 9 | ▼ 69.0% |
| May | 29 | 31 | ▲ 6.9% |
| June | 48 | 29 | ▼ 39.6% |
| July | 61 | 31 | ▼ 49.2% |
| August | 50 | – | – |
| September | 4 | – | – |
| October | 39 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 262 | 163 | ▼ 37.8% |
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 | 77.8% | 80.0% | ▲ 2.9% |
| February | 67.9% | 90.0% | ▲ 32.6% |
| March | 64.5% | 63.6% | ▼ 1.4% |
| April | 89.7% | 88.9% | ▼ 0.9% |
| May | 75.9% | 74.2% | ▼ 2.2% |
| June | 56.3% | 89.7% | ▲ 59.4% |
| July | 60.7% | 77.4% | ▲ 27.6% |
| August | 68.0% | – | – |
| September | 75.0% | – | – |
| October | 64.9% | – | in progress |
| November | 75.9% | – | – |
| December | 80.0% | – | – |
| Year-to-date average (Jan–Jul) | 70.4% | 80.5% | ▲ 14.5% |
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 | 1 | – |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 2 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 0 | 2 |
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 99.3% 677
- Cancelled 0.7% 5
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SEA IAD Seattle–Tacoma International Airport – Washington Dulles International Airport | 3,702 | 9.7 min | 77.4% | 400 |
| IAD SEA Washington Dulles International Airport – Seattle–Tacoma International Airport | 3,702 | 19.0 min | 69.7% | 191 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 33 | 33 | 90.9% | 0 |
| November 2024 | 41 | 41 | 92.7% | 0 |
| December 2024 | 30 | 30 | 76.7% | 0 |
| January 2025 | 36 | 36 | 77.8% | 0 |
| February 2025 | 28 | 28 | 67.9% | 0 |
| March 2025 | 31 | 31 | 64.5% | 0 |
| April 2025 | 29 | 29 | 89.7% | 0 |
| May 2025 | 29 | 29 | 75.9% | 0 |
| June 2025 | 48 | 48 | 56.3% | 0 |
| July 2025 | 61 | 61 | 60.7% | 0 |
| August 2025 | 50 | 50 | 68.0% | 0 |
| September 2025 | 4 | 4 | 75.0% | 0 |
| October 2025 | 39 | 37 | 64.9% | 2 |
| November 2025 | 29 | 29 | 75.9% | 0 |
| December 2025 | 31 | 30 | 80.0% | 1 |
| January 2026 | 31 | 30 | 80.0% | 1 |
| February 2026 | 21 | 20 | 90.0% | 1 |
| March 2026 | 11 | 11 | 63.6% | 0 |
| April 2026 | 9 | 9 | 88.9% | 0 |
| May 2026 | 31 | 31 | 74.2% | 0 |
| June 2026 | 29 | 29 | 89.7% | 0 |
| July 2026 | 31 | 31 | 77.4% | 0 |