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Showing Delta only (incl. its regional partners)All airlines ×
1,579 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: Delta’s SEA → SJC flights land within a few points of 87% on time whatever the hour.

Best time to leave 1–2 pm 95% arrive on time from SEA
Best single flight DL 3736 SEA 08:25 → SJC 10:49 · 91% on time Avoid DL 3956 SEA 20:30 → SJC 22:48 · 79% 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
94
87
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89
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69
% 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 3736flown by SkyWest SEA 08:25 SJC 10:49 91%
DL 3789flown by SkyWest SEA 11:45 SJC 14:11 84%
DL 3956flown by SkyWest SEA 20:30 SJC 22:48 79%

All 6 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 3736flown by SkyWest SEA 08:25 SJC 10:49 2h 24m 224 91% 0.0% 83 min
DL 3789flown by SkyWest SEA 11:45 SJC 14:11 2h 26m 349 84% 0.0% 61 min
DL 3897flown by SkyWest SEA 14:45 SJC 17:04 2h 19m 86 85% 0.0% 47 min
DL 4132flown by SkyWest SEA 17:45 SJC 20:03 2h 18m 73 86% 0.0% 70 min
DL 4100flown by SkyWest SEA 17:50 SJC 20:12 2h 22m 134 87% 0.7% 61 min
DL 3956flown by SkyWest SEA 20:30 SJC 22:48 2h 17m 200 79% 0.5% 51 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 SJC 2h 20m 87% 0.2% 1,579 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