Flight profile · Delta Air Lines
DL679
New York (JFK) to San Francisco (SFO) · scheduled 2:55 PM – 6:32 PM
How DL679 performs
811 operations, 2024-01-08 to 2026-06-30.
DL679 arrived on time 78.4% of the time, against 77.3% for all JFK → SFO flights — this specific departure is 1.1 percentage points better than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 811 operations between 2024-01-08 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL679 | 78.4% | 0.62% | -12 min | 8.4% | 811 |
| Delta Air Lines on JFK → SFO | 77.7% | 0.83% | -10 min | 8.4% | 6,718 |
| All JFK → SFO flights | 77.3% | 1.20% | -10 min | 8.3% | 20,197 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-01-08 to 2026-06-30
By day of week
Does DL679 run worse on particular days?
Tuesday is historically the most reliable day and Sunday the least, a gap of 6.7 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2024-01-08 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes DL679 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 |
|---|---|---|---|
| SFO→JFK San Francisco to New York | 2024-01-08 – 2024-10-25 | 93 | 91.3% |
| PHX→JFK Phoenix to New York | 2023-10-09 – 2024-06-06 | 81 | — |
| SEA→SNA Seattle to Santa Ana | 2024-04-09 – 2024-05-06 | 24 | — |
| JFK→SLC New York to Salt Lake City | 2024-03-16 – 2024-04-06 | 4 | — |
| CVG→ATL Cincinnati / Covington to Atlanta | 2023-09-05 – 2023-12-15 | 75 | — |
| MCO→MSP Orlando to Minneapolis | 2023-07-01 – 2023-09-04 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route DL679 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 811 records of DL679 operating JFK → SFO, 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.