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Showing Delta only (incl. its regional partners)All airlines ×
1,415 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: Delta’s JFK → BUF flights land within a few points of 82% on time whatever the hour.

Best time to leave 9–10 am 92% arrive on time from JFK
Best single flight DL 5223 JFK 08:00 → BUF 09:41 · 89% on time Avoid DL 5250 JFK 17:29 → BUF 19:25 · 74% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

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JFK
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% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55

Pick an hour to see this route’s flights leaving then.

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.
DL 5223flown by Endeavor JFK 08:00 BUF 09:41 89%
DL 5264flown by Endeavor JFK 22:40 BUF 00:38 83%
DL 5296flown by Endeavor JFK 13:29 BUF 15:09 82%
DL 5250flown by Endeavor JFK 17:29 BUF 19:25 74%

All 4 Delta flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.
DL 5223flown by Endeavor JFK 08:00 BUF 09:41 1h 41m 344 89% 2.9% 54 min
DL 5296flown by Endeavor JFK 13:29 BUF 15:09 1h 40m 312 82% 4.2% 71 min
DL 5250flown by Endeavor JFK 17:29 BUF 19:25 1h 57m 348 74% 8.9% 57 min
DL 5264flown by Endeavor JFK 22:40 BUF 00:38 1h 58m 347 83% 8.4% 81 min

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
Delta JFK BUF 1h 41m 82% 6.1% 1,415 Flying now
Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON