Flight profile · Alaska Airlines
AS34
Seattle (SEA) to New York (JFK) · scheduled 7:36 AM – 7:29 PM
How AS34 performs
1,095 operations, 2023-07-01 to 2026-06-30.
AS34 arrived on time 72.5% of the time, against 74.9% for all SEA → JFK flights — this specific departure is 2.4 percentage points worse than the route as a whole. Against Alaska Airlines’s own flights on this route it is 2.2 points better.
Source: US DOT Bureau of Transportation Statistics · 1,095 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS34 | 72.5% | 2.28% | -1 min | 7.9% | 1,095 |
| Alaska Airlines on SEA → JFK | 70.3% | 1.68% | 0 min | 8.4% | 4,099 |
| All SEA → JFK flights | 74.9% | 1.59% | -4 min | 7.5% | 8,844 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does AS34 run worse on particular days?
Monday is historically the most reliable day and Friday the least, a gap of 6.1 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Data and methodology
Calculated by FlyerIntel from 1,095 records of AS34 operating SEA → JFK, 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.