AS370
AS370 (Alaska Airlines) is a multi-stop service on 6 routes, busiest Philadelphia to Seattle. Of 267 departures recorded from October 2024 to May 2026, 86.1% left on time, according to the US BTS.
- On-time departures86.1%of 267 flights
- Average delay4.0 min
- May 202612▼ 29.4%vs May 2025
- Cancelled0.4%
- 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 periods13 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 5 | 24 | ▲ 380.0% |
| February | – | 25 | – |
| March | – | 23 | – |
| April | – | 30 | – |
| May | 17 | 12 | ▼ 29.4% |
| June | 11 | – | – |
| July | – | – | – |
| August | 2 | – | – |
| September | 4 | – | – |
| October | 1 | – | in progress |
| November | 9 | – | – |
| December | 31 | – | – |
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 periods13 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 40.0% | 83.3% | ▲ 108.3% |
| February | – | 92.0% | – |
| March | – | 95.7% | – |
| April | – | 93.3% | – |
| May | 82.4% | 100.0% | ▲ 21.4% |
| June | 72.7% | – | – |
| July | – | – | – |
| August | 100.0% | – | – |
| September | 100.0% | – | – |
| October | 100.0% | – | in progress |
| November | 88.9% | – | – |
| December | 90.0% | – | – |
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 periods13 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | – | 0 | – |
| March | – | 0 | – |
| April | – | 0 | – |
| May | 0 | 0 | – |
| June | 0 | – | – |
| July | – | – | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
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 99.6% 266
- Cancelled 0.4% 1
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → May 12, 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 |
|---|---|---|---|---|
| PHL SEA Philadelphia International Airport – Seattle–Tacoma International Airport | 3,818 | 5.8 min | 83.4% | 163 |
| SAN ATL San Diego International Airport – Hartsfield Jackson Atlanta International Airport | 3,038 | 1.9 min | 92.5% | 53 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 29 | 29 | 93.1% | 0 |
| December 2024 | 24 | 24 | 54.2% | 0 |
| January 2025 | 5 | 5 | 40.0% | 0 |
| May 2025 | 17 | 17 | 82.4% | 0 |
| June 2025 | 11 | 11 | 72.7% | 0 |
| August 2025 | 2 | 2 | 100.0% | 0 |
| September 2025 | 4 | 4 | 100.0% | 0 |
| October 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 9 | 9 | 88.9% | 0 |
| December 2025 | 31 | 30 | 90.0% | 1 |
| January 2026 | 24 | 24 | 83.3% | 0 |
| February 2026 | 25 | 25 | 92.0% | 0 |
| March 2026 | 23 | 23 | 95.7% | 0 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 12 | 12 | 100.0% | 0 |