Flight profile · Delta Air Lines
DL429
Seattle (SEA) to New York (JFK) · scheduled 7:10 AM – 3:49 PM
How DL429 performs
754 operations, 2024-06-07 to 2026-06-30.
DL429 arrived on time 87.0% of the time, against 74.9% for all SEA → JFK flights — this specific departure is 12.1 percentage points better than the route as a whole. Against Delta Air Lines’s own flights on this route it is 4.9 points better.
Source: US DOT Bureau of Transportation Statistics · 754 operations between 2024-06-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL429 | 87.0% | 1.86% | -10 min | 3.0% | 754 |
| Delta Air Lines on SEA → JFK | 82.1% | 1.39% | -9 min | 5.2% | 3,968 |
| All SEA → JFK flights | 74.9% | 1.59% | -4 min | 7.5% | 8,844 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-06-07 to 2026-06-30
Other routes DL429 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.
Because the same number has served different journeys, the statistics above describe only the route DL429 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 754 records of DL429 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.