Flight profile · Alaska Airlines
AS17
New York (JFK) to Seattle (SEA) · scheduled 4:59 PM – 10:00 PM
How AS17 performs
1,017 operations, 2023-07-01 to 2026-06-30.
AS17 arrived on time 65.4% of the time, against 76.7% for all JFK → SEA flights — this specific departure is 11.2 percentage points worse than the route as a whole. Against Alaska Airlines’s own flights on this route it is 11.5 points worse.
Source: US DOT Bureau of Transportation Statistics · 1,017 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS17 | 65.4% | 2.65% | 0 min | 12.0% | 1,017 |
| Alaska Airlines on JFK → SEA | 76.9% | 2.07% | -7 min | 7.1% | 4,099 |
| All JFK → SEA flights | 76.7% | 1.71% | -7 min | 7.4% | 8,844 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does AS17 run worse on particular days?
Monday is historically the most reliable day and Thursday the least, a gap of 13.7 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.
Why AS17 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding, fuelling — within the carrier’s control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for AS17 on JFK → SEA. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on JFK → SEA
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| AS23 | Alaska Airlines | 84.9% | 11 min early | 975 |
| DL699 | Delta Air Lines | 81.4% | 9 min early | 783 |
| AS31 | Alaska Airlines | 80.7% | 7 min early | 1,080 |
| AS21 | Alaska Airlines | 76.7% | 7 min early | 937 |
| DL740 | Delta Air Lines | 72.8% | 5 min early | 769 |
| DL688 | Delta Air Lines | 67.9% | 0 min early | 776 |
| B6263 | JetBlue | 66.9% | 4 min early | 643 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 1,017 records of AS17 operating JFK → 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.
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