AS329
AS329 (Alaska Airlines) is a multi-stop service on 3 routes, busiest Chicago to Seattle. Of 476 departures recorded from October 2024 to July 2026, 76.0% left on time, according to the US BTS.
- On-time departures76.0%of 476 flights
- Average delay14.7 min
- July 202630▼ 3.2%vs July 2025
- Cancelled1.3%
- 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 | 4 | 10 | ▲ 150.0% |
| February | 1 | 9 | ▲ 800.0% |
| March | 11 | 7 | ▼ 36.4% |
| April | 27 | 9 | ▼ 66.7% |
| May | 31 | 30 | ▼ 3.2% |
| June | 30 | 30 | 0.0% |
| July | 31 | 30 | ▼ 3.2% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 28 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 135 | 125 | ▼ 7.4% |
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 | 50.0% | 100.0% | ▲ 100.0% |
| February | 100.0% | 88.9% | ▼ 11.1% |
| March | 100.0% | 71.4% | ▼ 28.6% |
| April | 96.3% | 75.0% | ▼ 22.1% |
| May | 87.1% | 76.7% | ▼ 12.0% |
| June | 70.0% | 65.5% | ▼ 6.4% |
| July | 83.9% | 48.3% | ▼ 42.4% |
| August | 77.4% | – | – |
| September | 76.7% | – | – |
| October | 66.7% | – | in progress |
| November | 71.4% | – | – |
| December | 79.3% | – | – |
| Year-to-date average (Jan–Jul) | 83.9% | 75.1% | ▼ 10.5% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 3 |
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 98.7% 470
- Cancelled 1.3% 6
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD SEA Chicago O'Hare International Airport – Seattle–Tacoma International Airport | 2,762 | 14.9 min | 75.7% | 470 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 18 | 17 | 82.4% | 1 |
| November 2024 | 21 | 21 | 61.9% | 0 |
| December 2024 | 28 | 27 | 77.8% | 1 |
| January 2025 | 4 | 4 | 50.0% | 0 |
| February 2025 | 1 | 1 | 100.0% | 0 |
| March 2025 | 11 | 11 | 100.0% | 0 |
| April 2025 | 27 | 27 | 96.3% | 0 |
| May 2025 | 31 | 31 | 87.1% | 0 |
| June 2025 | 30 | 30 | 70.0% | 0 |
| July 2025 | 31 | 31 | 83.9% | 0 |
| August 2025 | 31 | 31 | 77.4% | 0 |
| September 2025 | 30 | 30 | 76.7% | 0 |
| October 2025 | 31 | 30 | 66.7% | 1 |
| November 2025 | 28 | 28 | 71.4% | 0 |
| December 2025 | 29 | 29 | 79.3% | 0 |
| January 2026 | 10 | 10 | 100.0% | 0 |
| February 2026 | 9 | 9 | 88.9% | 0 |
| March 2026 | 7 | 7 | 71.4% | 0 |
| April 2026 | 9 | 8 | 75.0% | 1 |
| May 2026 | 30 | 30 | 76.7% | 0 |
| June 2026 | 30 | 29 | 65.5% | 1 |
| July 2026 | 30 | 29 | 48.3% | 1 |