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Showing Delta only (incl. its regional partners)All airlines ×
1,337 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 92% depart on time. After 4 pm it’s 4 in 5.

Best time to leave 9–10 pm 88% arrive on time from SEA
Best single flight DL 429 SEA 07:15 → JFK 15:45 · 88% on time Avoid DL 415 SEA 11:40 → JFK 20:25 · 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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SEA
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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 429 SEA 07:15 JFK 15:45 88%
DL 452 SEA 22:20 JFK 06:34 86%
DL 415 SEA 11:40 JFK 20:25 74%

All 5 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 429 SEA 07:15 JFK 15:45 5h 30m 365 88% 4.1% 112 min
DL 415 SEA 11:40 JFK 20:25 5h 45m 363 74% 2.8% 71 min
DL 461 SEA 16:00 JFK 00:25 5h 25m 55 53% 7.3% 71 min
DL 722 SEA 16:15 JFK 00:41 5h 26m 31 84% 0.0% 74 min
DL 452 SEA 22:20 JFK 06:34 5h 14m 361 86% 3.0% 38 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 SEA JFK 5h 26m 81% 3.1% 1,337 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