Flight profile · Delta Air Lines
DL1233
New York (JFK) to Austin (AUS) · scheduled 6:20 PM – 9:44 PM
How DL1233 performs
845 operations, 2024-01-08 to 2026-06-30.
DL1233 arrived on time 73.4% of the time, against 79.5% for all JFK → AUS flights — this specific departure is 6.1 percentage points worse than the route as a whole. Against Delta Air Lines’s own flights on this route it is 7.6 points worse.
Source: US DOT Bureau of Transportation Statistics · 845 operations between 2024-01-08 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1233 | 73.4% | 2.13% | -10 min | 10.7% | 845 |
| Delta Air Lines on JFK → AUS | 81.0% | 1.69% | -12 min | 6.4% | 3,852 |
| All JFK → AUS flights | 79.5% | 1.92% | -11 min | 7.9% | 6,928 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-01-08 to 2026-06-30
By day of week
Does DL1233 run worse on particular days?
Friday is historically the most reliable day and Sunday the least, a gap of 10.6 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 DL1233 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 DL1233 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 845 records of DL1233 operating JFK → AUS, 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.