AS337
AS337 (Alaska Airlines) is a multi-stop service on 7 routes, busiest Chicago to Seattle. Of 452 departures recorded from November 2024 to July 2026, 65.5% left on time, according to the US BTS.
- On-time departures65.5%of 452 flights
- Average delay18.6 min
- July 202627▼ 10.0%vs July 2025
- Cancelled3.1%
- Legs flown under this number7
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 6 | – |
| February | 16 | 17 | ▲ 6.3% |
| March | 27 | 28 | ▲ 3.7% |
| April | 22 | 26 | ▲ 18.2% |
| May | 31 | 26 | ▼ 16.1% |
| June | 30 | 27 | ▼ 10.0% |
| July | 30 | 27 | ▼ 10.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 29 | – | in progress |
| November | 20 | – | – |
| December | 28 | – | – |
according to the US BTS · November 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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 33.3% | – |
| February | 86.7% | 88.2% | ▲ 1.8% |
| March | 77.8% | 81.5% | ▲ 4.8% |
| April | 81.8% | 92.3% | ▲ 12.8% |
| May | 93.6% | 76.9% | ▼ 17.8% |
| June | 63.3% | 65.4% | ▲ 3.2% |
| July | 43.3% | 57.7% | ▲ 33.1% |
| August | 33.3% | – | – |
| September | 44.8% | – | – |
| October | 50.0% | – | in progress |
| November | 56.3% | – | – |
| December | 48.0% | – | – |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 1 | – |
| August | 1 | – | – |
| September | 1 | – | – |
| October | 1 | – | in progress |
| November | 4 | – | – |
| December | 3 | – | – |
according to the US BTS · November 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 96.9% 438
- Cancelled 3.1% 14
Share of all recorded flights in the period, all legs. · Nov 22, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD SEA Chicago O'Hare International Airport – Seattle–Tacoma International Airport | 2,762 | 30.0 min | 49.8% | 261 |
| SFO PDX San Francisco International Airport – Portland International Airport | 886 | 2.3 min | 86.8% | 84 |
| EUG SEA Eugene Airport – Seattle–Tacoma International Airport | 376 | 0.3 min | 90.9% | 34 |
| PHX ANC Phoenix Sky Harbor International Airport – Ted Stevens Anchorage International Airport | 4,102 | 11.4 min | 81.3% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 1 | 1 | 100.0% | 0 |
| February 2025 | 16 | 15 | 86.7% | 1 |
| March 2025 | 27 | 27 | 77.8% | 0 |
| April 2025 | 22 | 22 | 81.8% | 0 |
| May 2025 | 31 | 31 | 93.6% | 0 |
| June 2025 | 30 | 30 | 63.3% | 0 |
| July 2025 | 30 | 30 | 43.3% | 0 |
| August 2025 | 31 | 30 | 33.3% | 1 |
| September 2025 | 30 | 29 | 44.8% | 1 |
| October 2025 | 29 | 28 | 50.0% | 1 |
| November 2025 | 20 | 16 | 56.3% | 4 |
| December 2025 | 28 | 25 | 48.0% | 3 |
| January 2026 | 6 | 6 | 33.3% | 0 |
| February 2026 | 17 | 17 | 88.2% | 0 |
| March 2026 | 28 | 27 | 81.5% | 1 |
| April 2026 | 26 | 26 | 92.3% | 0 |
| May 2026 | 26 | 26 | 76.9% | 0 |
| June 2026 | 27 | 26 | 65.4% | 1 |
| July 2026 | 27 | 26 | 57.7% | 1 |