Flight profile · Delta Air Lines
DL809
Atlanta (ATL) to San Jose (SJC) · scheduled 9:20 AM – 11:20 AM
How DL809 performs
999 operations, 2023-09-05 to 2026-06-30.
DL809 arrived on time 90.6% of the time, against 86.3% for all ATL → SJC flights — this specific departure is 4.3 percentage points better than the route as a whole. Against Delta Air Lines’s own flights on this route it is 4.3 points better.
Source: US DOT Bureau of Transportation Statistics · 999 operations between 2023-09-05 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL809 | 90.6% | 0.70% | -9 min | 2.3% | 999 |
| Delta Air Lines on ATL → SJC | 86.3% | 0.94% | -8 min | 3.7% | 2,543 |
| All ATL → SJC flights | 86.3% | 0.94% | -8 min | 3.7% | 2,543 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-09-05 to 2026-06-30
By day of week
Does DL809 run worse on particular days?
Friday is historically the most reliable day and Monday the least, a gap of 4.7 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-09-05 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes DL809 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 |
|---|---|---|---|
| SJC→ATL San Jose to Atlanta | 2023-09-05 – 2026-06-30 | 980 | 92.0% |
| MSN→MSP Madison to Minneapolis | 2023-07-15 – 2023-09-03 | 9 | — |
| SFO→DTW San Francisco to Detroit | 2023-07-10 – 2023-07-31 | 13 | — |
| ATL→DAY Atlanta to Dayton | 2023-07-05 – 2023-07-09 | 2 | — |
| DAY→ATL Dayton to Atlanta | 2023-07-05 – 2023-07-09 | 2 | — |
| ATL→SAV Atlanta to Savannah | 2023-07-02 – 2023-07-07 | 5 | — |
| SAV→ATL Savannah to Atlanta | 2023-07-02 – 2023-07-07 | 5 | — |
Because the same number has served different journeys, the statistics above describe only the route DL809 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 999 records of DL809 operating ATL → SJC, 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.