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Showing Delta only (incl. its regional partners)All airlines ×
1,634 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: Delta’s SMF → SEA flights land within a few points of 9 in 10 on time whatever the hour.

Best time to leave 12–1 pm 93% arrive on time from SMF
Best single flight DL 4125 SMF 13:00 → SEA 15:16 · 93% on time Avoid DL 4075 SMF 07:52 → SEA 10:05 · 89% 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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SMF
94
93
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91
87
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85
% 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 4125flown by SkyWest SMF 13:00 SEA 15:16 93%
DL 3881flown by SkyWest SMF 11:34 SEA 13:45 90%
DL 4075flown by SkyWest SMF 07:52 SEA 10:05 89%

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 4075flown by SkyWest SMF 07:52 SEA 10:05 2h 13m 349 89% 0.0% 49 min
DL 3881flown by SkyWest SMF 11:34 SEA 13:45 2h 14m 205 90% 0.0% 63 min
DL 4125flown by SkyWest SMF 13:00 SEA 15:16 2h 16m 156 93% 0.0% 120 min
DL 4153flown by SkyWest SMF 17:27 SEA 19:39 2h 12m 110 85% 0.0% 55 min
DL 4043flown by SkyWest SMF 19:41 SEA 22:05 2h 24m 146 81% 0.0% 53 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 SMF SEA 2h 14m 89% 0.2% 1,634 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