AS439
AS439 (Alaska Airlines) flies Houston to Seattle. Of 640 departures recorded from October 2024 to July 2026, 64.3% left on time, according to the US BTS.
- On-time departures64.3%of 640 flights
- Average delay17.3 min
- July 202630▲ 0.0%vs July 2025
- Cancelled1.1%
according to the US BTS · Oct 13, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 30 | 31 | ▲ 3.3% |
| February | 28 | 28 | 0.0% |
| March | 30 | 29 | ▼ 3.3% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 30 | 30 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 209 | 209 | 0.0% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 89.7% | 61.3% | ▼ 31.6% |
| February | 60.7% | 71.4% | ▲ 17.7% |
| March | 75.9% | 64.3% | ▼ 15.3% |
| April | 53.3% | 76.7% | ▲ 43.8% |
| May | 51.6% | 87.1% | ▲ 68.8% |
| June | 26.9% | 90.0% | ▲ 234.3% |
| July | 30.0% | 86.7% | ▲ 188.9% |
| August | 48.4% | – | – |
| September | 76.7% | – | – |
| October | 61.3% | – | in progress |
| November | 51.7% | – | – |
| December | 35.5% | – | – |
| Year-to-date average (Jan–Jul) | 55.4% | 76.8% | ▲ 38.5% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 4 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 6 | 1 | ▼ 83.3% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
Cancellation share
- Not cancelled 98.9% 633
- Cancelled 1.1% 7
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| IAH SEA George Bush Intercontinental Airport – Seattle–Tacoma International Airport | 3,013 | 17.3 min | 64.3% | 640 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 81.3% | 0 |
| November 2024 | 23 | 23 | 73.9% | 0 |
| December 2024 | 31 | 31 | 67.7% | 0 |
| January 2025 | 30 | 29 | 89.7% | 1 |
| February 2025 | 28 | 28 | 60.7% | 0 |
| March 2025 | 30 | 29 | 75.9% | 1 |
| April 2025 | 30 | 30 | 53.3% | 0 |
| May 2025 | 31 | 31 | 51.6% | 0 |
| June 2025 | 30 | 26 | 26.9% | 4 |
| July 2025 | 30 | 30 | 30.0% | 0 |
| August 2025 | 31 | 31 | 48.4% | 0 |
| September 2025 | 30 | 30 | 76.7% | 0 |
| October 2025 | 31 | 31 | 61.3% | 0 |
| November 2025 | 29 | 29 | 51.7% | 0 |
| December 2025 | 31 | 31 | 35.5% | 0 |
| January 2026 | 31 | 31 | 61.3% | 0 |
| February 2026 | 28 | 28 | 71.4% | 0 |
| March 2026 | 29 | 28 | 64.3% | 1 |
| April 2026 | 30 | 30 | 76.7% | 0 |
| May 2026 | 31 | 31 | 87.1% | 0 |
| June 2026 | 30 | 30 | 90.0% | 0 |
| July 2026 | 30 | 30 | 86.7% | 0 |