AS597
AS597 (Alaska Airlines) is a multi-stop service on 5 routes, busiest Chicago to San Francisco. Of 409 departures recorded from October 2024 to May 2026, 64.2% left on time, according to the US BTS.
- On-time departures64.2%of 409 flights
- Average delay21.9 min
- May 20261▼ 96.6%vs May 2025
- Cancelled1.0%
- Legs flown under this number5
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 20 | 31 | ▲ 55.0% |
| February | 22 | 28 | ▲ 27.3% |
| March | 28 | 31 | ▲ 10.7% |
| April | 26 | 21 | ▼ 19.2% |
| May | 29 | 1 | ▼ 96.6% |
| June | 30 | – | – |
| July | 31 | – | – |
| August | 19 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 3 | – | – |
| December | 15 | – | – |
| Year to date (Jan–May) | 125 | 112 | ▼ 10.4% |
according to the US BTS · October 2024 → May 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 50.0% | 71.0% | ▲ 41.9% |
| February | 59.1% | 67.9% | ▲ 14.8% |
| March | 67.9% | 61.3% | ▼ 9.7% |
| April | 57.7% | 76.2% | ▲ 32.1% |
| May | 69.0% | 100.0% | ▲ 45.0% |
| June | 73.3% | – | – |
| July | 51.7% | – | – |
| August | 50.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 100.0% | – | – |
| December | 35.7% | – | – |
| Year-to-date average (Jan–May) | 60.7% | 75.3% | ▲ 23.9% |
according to the US BTS · October 2024 → May 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → May 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods15 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 | – | – |
| July | 2 | – | – |
| August | 1 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–May) | 0 | 0 |
according to the US BTS · October 2024 → May 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 99.0% 405
- Cancelled 1.0% 4
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → May 13, 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 |
|---|---|---|---|---|
| ORD SFO Chicago O'Hare International Airport – San Francisco International Airport | 2,964 | 21.8 min | 63.4% | 279 |
| SAN HNL San Diego International Airport – Daniel K. Inouye International Airport | 4,201 | 22.6 min | 65.3% | 125 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 18 | 18 | 66.7% | 0 |
| November 2024 | 26 | 26 | 69.2% | 0 |
| December 2024 | 30 | 30 | 73.3% | 0 |
| January 2025 | 20 | 20 | 50.0% | 0 |
| February 2025 | 22 | 22 | 59.1% | 0 |
| March 2025 | 28 | 28 | 67.9% | 0 |
| April 2025 | 26 | 26 | 57.7% | 0 |
| May 2025 | 29 | 29 | 69.0% | 0 |
| June 2025 | 30 | 30 | 73.3% | 0 |
| July 2025 | 31 | 29 | 51.7% | 2 |
| August 2025 | 19 | 18 | 50.0% | 1 |
| November 2025 | 3 | 3 | 100.0% | 0 |
| December 2025 | 15 | 14 | 35.7% | 1 |
| January 2026 | 31 | 31 | 71.0% | 0 |
| February 2026 | 28 | 28 | 67.9% | 0 |
| March 2026 | 31 | 31 | 61.3% | 0 |
| April 2026 | 21 | 21 | 76.2% | 0 |
| May 2026 | 1 | 1 | 100.0% | 0 |