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Showing Delta only (incl. its regional partners)All airlines ×
2,227 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 95% depart on time. After 4 pm it’s 4 in 5.

Best time to leave 7–8 am 96% arrive on time from SEA
Best single flight DL 1128 SEA 05:30 → SLC 08:30 · 94% on time Avoid DL 1165 SEA 17:59 → SLC 21:09 · 81% 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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% 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 1128 SEA 05:30 SLC 08:30 94%
DL 1016 SEA 09:30 SLC 12:38 90%
DL 1265 SEA 11:05 SLC 14:11 86%
DL 1120 SEA 13:30 SLC 16:40 83%
DL 1239 SEA 19:50 SLC 22:55 82%
· · ·
DL 1165 SEA 17:59 SLC 21:09 81%

All 7 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 1128 SEA 05:30 SLC 08:30 2h 00m 365 94% 0.5% 74 min
DL 2858 SEA 07:15 SLC 10:23 2h 08m 86 96% 1.2% 145 min
DL 1016 SEA 09:30 SLC 12:38 2h 08m 363 90% 0.8% 55 min
DL 1265 SEA 11:05 SLC 14:11 2h 06m 344 86% 0.6% 56 min
DL 1120 SEA 13:30 SLC 16:40 2h 10m 365 83% 0.3% 62 min
DL 1165 SEA 17:59 SLC 21:09 2h 10m 302 81% 0.7% 59 min
DL 1239 SEA 19:50 SLC 22:55 2h 05m 253 82% 0.4% 54 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 SLC 2h 08m 87% 0.5% 2,227 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