Flight profile · Alaska Airlines
AS370
Philadelphia (PHL) to Seattle (SEA) · scheduled 7:00 AM – 10:07 AM
How AS370 performs
367 operations, 2024-03-14 to 2026-05-12.
AS370 arrived on time 76.0% of the time, against 70.2% for all PHL → SEA flights — this specific departure is 5.9 percentage points better than the route as a whole. Against Alaska Airlines’s own flights on this route it is 6.4 points better.
Source: US DOT Bureau of Transportation Statistics · 367 operations between 2024-03-14 to 2026-05-12
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS370 | 76.0% | 0.00% | -6 min | 3.0% | 367 |
| Alaska Airlines on PHL → SEA | 69.6% | 1.26% | -1 min | 7.7% | 1,907 |
| All PHL → SEA flights | 70.2% | 1.57% | -2 min | 7.8% | 3,431 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-03-14 to 2026-05-12
Other routes AS370 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| SAN→ATL San Diego to Atlanta | 2026-01-07 – 2026-03-10 | 53 | — |
| FAI→SEA Fairbanks to Seattle | 2025-12-02 – 2025-12-17 | 16 | — |
| SEA→SNA Seattle to Santa Ana | 2025-10-25 – 2025-10-25 | 1 | — |
| PDX→ORD Portland to Chicago | 2025-08-23 – 2025-09-27 | 6 | — |
| SEA→LAX Seattle to Los Angeles | 2025-05-15 – 2025-06-11 | 28 | — |
| SNA→PDX Santa Ana to Portland | 2024-03-09 – 2024-03-09 | 1 | — |
| SFO→FLL San Francisco to Fort Lauderdale | 2023-11-17 – 2024-02-14 | 67 | — |
| SEA→RSW Seattle to Fort Myers | 2023-11-01 – 2023-11-16 | 16 | — |
Because the same number has served different journeys, the statistics above describe only the route AS370 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 367 records of AS370 operating PHL → SEA, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.