AS598
AS598 (Alaska Airlines) is a multi-stop service on 6 routes, busiest San Francisco to Chicago. Of 466 departures recorded from October 2024 to July 2026, 70.8% left on time, according to the US BTS.
- On-time departures70.8%of 466 flights
- Average delay16.1 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.5%
- Legs flown under this number6
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 19 | 31 | ▲ 63.2% |
| February | 22 | 28 | ▲ 27.3% |
| March | 31 | 31 | 0.0% |
| April | 29 | 21 | ▼ 27.6% |
| May | 29 | 1 | ▼ 96.6% |
| June | 30 | 21 | ▼ 30.0% |
| July | 31 | 31 | 0.0% |
| August | 19 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 1 | – | – |
| December | 15 | – | – |
| Year to date (Jan–Jul) | 191 | 164 | ▼ 14.1% |
according to the US BTS · October 2024 → July 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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 68.4% | 71.0% | ▲ 3.7% |
| February | 59.1% | 78.6% | ▲ 33.0% |
| March | 67.7% | 51.6% | ▼ 23.8% |
| April | 82.8% | 63.2% | ▼ 23.7% |
| May | 89.7% | 100.0% | ▲ 11.5% |
| June | 76.7% | 76.2% | ▼ 0.6% |
| July | 62.1% | 71.0% | ▲ 14.3% |
| August | 61.1% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 0.0% | – | – |
| December | 92.3% | – | – |
| Year-to-date average (Jan–Jul) | 72.3% | 73.1% | ▲ 1.0% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 2 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 1 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 2 | 2 | 0.0% |
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 98.5% 459
- Cancelled 1.5% 7
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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SFO ORD San Francisco International Airport – Chicago O'Hare International Airport | 2,964 | 16.5 min | 71.4% | 286 |
| HNL SAN Daniel K. Inouye International Airport – San Diego International Airport | 4,201 | 19.2 min | 68.6% | 125 |
| SEA RNO Seattle–Tacoma International Airport – Reno Tahoe International Airport | 907 | 7.5 min | 73.1% | 52 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 73.7% | 0 |
| November 2024 | 28 | 28 | 60.7% | 0 |
| December 2024 | 29 | 29 | 75.9% | 0 |
| January 2025 | 19 | 19 | 68.4% | 0 |
| February 2025 | 22 | 22 | 59.1% | 0 |
| March 2025 | 31 | 31 | 67.7% | 0 |
| April 2025 | 29 | 29 | 82.8% | 0 |
| May 2025 | 29 | 29 | 89.7% | 0 |
| June 2025 | 30 | 30 | 76.7% | 0 |
| July 2025 | 31 | 29 | 62.1% | 2 |
| August 2025 | 19 | 18 | 61.1% | 1 |
| November 2025 | 1 | 1 | 0.0% | 0 |
| December 2025 | 15 | 13 | 92.3% | 2 |
| January 2026 | 31 | 31 | 71.0% | 0 |
| February 2026 | 28 | 28 | 78.6% | 0 |
| March 2026 | 31 | 31 | 51.6% | 0 |
| April 2026 | 21 | 19 | 63.2% | 2 |
| May 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 21 | 21 | 76.2% | 0 |
| July 2026 | 31 | 31 | 71.0% | 0 |