About 1 in 7 DL 5426 flights from Buffalo arrived 15+ minutes late, diverted or cancelled over the past year (15%); 2.2% were cancelled. The typical flight landed 8 minutes early.
DL 5426: BUF → JFK
Scheduled to leave Buffalo at 10:00 a.m. local time, operated by Endeavor Air as 9E 5426. Over the past year it arrived on time 85% of the time (136 flights), in line with other DL flights on the route at that hour (88%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 23 | 78% |
| Tuesday | 22 | 86% |
| Wednesday | 22 | 91% |
| Thursday | 20 | 80% |
| Friday | 20 | 90% |
| Saturday | 8 | — |
| Sunday | 21 | 86% |
Why it was late
All flights BUF → JFK · Connecting off DL 5426? Check the risk
Questions
How often is DL 5426 from BUF to JFK late?
Delta Air Lines 5426 from Buffalo, NY to New York, NY arrived 15 or more minutes late, was diverted or was cancelled on 15% of 136 scheduled flights between September 2025 and August 2026. 2.2% 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.