AS306
AS306 (Alaska Airlines) is a multi-stop service on 2 routes, busiest Seattle to Boston. Of 771 departures recorded from October 2024 to July 2026, 80.5% left on time, according to the US BTS.
- On-time departures80.5%of 771 flights
- Average delay10.2 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.2%
- Legs flown under this number2
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 | 31 | 31 | 0.0% |
| February | 28 | 28 | 0.0% |
| March | 31 | 41 | ▲ 32.3% |
| April | 30 | 54 | ▲ 80.0% |
| May | 31 | 62 | ▲ 100.0% |
| June | 30 | 39 | ▲ 30.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 35 | – | in progress |
| November | 53 | – | – |
| December | 46 | – | – |
| Year to date (Jan–Jul) | 212 | 286 | ▲ 34.9% |
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 | 90.3% | 82.8% | ▼ 8.4% |
| February | 66.7% | 88.9% | ▲ 33.3% |
| March | 80.7% | 85.0% | ▲ 5.4% |
| April | 83.3% | 64.8% | ▼ 22.2% |
| May | 76.7% | 71.0% | ▼ 7.4% |
| June | 73.3% | 82.1% | ▲ 11.9% |
| July | 90.3% | 74.2% | ▼ 17.9% |
| August | 93.6% | – | – |
| September | 73.3% | – | – |
| October | 62.9% | – | in progress |
| November | 84.3% | – | – |
| December | 91.1% | – | – |
| Year-to-date average (Jan–Jul) | 80.2% | 78.4% | ▼ 2.2% |
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 | 2 | – |
| February | 1 | 1 | 0.0% |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 2 | 4 | ▲ 100.0% |
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 98.8% 762
- Cancelled 1.2% 9
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 BOS Seattle–Tacoma International Airport – Boston Logan International Airport | 4,006 | 10.0 min | 80.9% | 655 |
| BOS SEA Boston Logan International Airport – Seattle–Tacoma International Airport | 4,006 | 11.5 min | 78.1% | 116 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 100.0% | 0 |
| November 2024 | 28 | 28 | 100.0% | 0 |
| December 2024 | 31 | 31 | 77.4% | 0 |
| January 2025 | 31 | 31 | 90.3% | 0 |
| February 2025 | 28 | 27 | 66.7% | 1 |
| March 2025 | 31 | 31 | 80.7% | 0 |
| April 2025 | 30 | 30 | 83.3% | 0 |
| May 2025 | 31 | 30 | 76.7% | 1 |
| June 2025 | 30 | 30 | 73.3% | 0 |
| July 2025 | 31 | 31 | 90.3% | 0 |
| August 2025 | 31 | 31 | 93.6% | 0 |
| September 2025 | 30 | 30 | 73.3% | 0 |
| October 2025 | 35 | 35 | 62.9% | 0 |
| November 2025 | 53 | 51 | 84.3% | 2 |
| December 2025 | 46 | 45 | 91.1% | 1 |
| January 2026 | 31 | 29 | 82.8% | 2 |
| February 2026 | 28 | 27 | 88.9% | 1 |
| March 2026 | 41 | 40 | 85.0% | 1 |
| April 2026 | 54 | 54 | 64.8% | 0 |
| May 2026 | 62 | 62 | 71.0% | 0 |
| June 2026 | 39 | 39 | 82.1% | 0 |
| July 2026 | 31 | 31 | 74.2% | 0 |