About 1 in 6 DL 1643 flights from New York arrived 15+ minutes late, diverted or cancelled over the past year (17%); 2.0% were cancelled. The typical flight landed 18 minutes early.
DL 1643: JFK → AUS
Scheduled to leave New York at 1:40 p.m. local time. Over the past year it arrived on time 83% of the time (247 flights), in line with other DL flights on the route at that hour (83%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 37 | 84% |
| Tuesday | 36 | 86% |
| Wednesday | 36 | 81% |
| Thursday | 36 | 83% |
| Friday | 35 | 86% |
| Saturday | 32 | 84% |
| Sunday | 35 | 74% |
Why it was late
All flights JFK → AUS · Connecting off DL 1643? Check the risk
DL 1643: AUS → JFK
Scheduled to leave Austin at 6:00 p.m. local time. Over the past year it arrived on time 75% of the time (225 flights), better than other DL flights on the route at that hour (70%). Last seen in the data Aug 31, 2026.
Usually Delta Air Lines's last flight of the day from Austin to New York (100% of days). Delta Air Lines's last AUS–JFK flight was cancelled 2.5% of the time, against 3.4% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 7:35 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 33 | 70% |
| Tuesday | 32 | 88% |
| Wednesday | 32 | 78% |
| Thursday | 32 | 63% |
| Friday | 32 | 88% |
| Saturday | 32 | 69% |
| Sunday | 32 | 72% |
Why it was late
All flights AUS → JFK · Connecting off DL 1643? Check the risk
Questions
How often is DL 1643 from JFK to AUS late?
Delta Air Lines 1643 from New York, NY to Austin, TX arrived 15 or more minutes late, was diverted or was cancelled on 17% of 247 scheduled flights between September 2025 and August 2026. 2.0% were cancelled.
How often is DL 1643 from AUS to JFK late?
Delta Air Lines 1643 from Austin, TX to New York, NY arrived 15 or more minutes late, was diverted or was cancelled on 25% of 225 scheduled flights between September 2025 and August 2026. 1.8% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Delta Air Lines for today's flight. Method.