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Showing Delta only (incl. its regional partners)All airlines ×
1,078 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: Delta’s SUN → SLC flights land within a few points of 94% on time whatever the hour.

Best time to leave 7–8 am 98% arrive on time from SUN
Best single flight DL 4037 SUN 07:20 → SLC 08:25 · 98% on time Avoid DL 4019 SUN 13:10 → SLC 14:24 · 91% 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).

7
8
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SUN
98
92
90
93
% 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 4037flown by SkyWest SUN 07:20 SLC 08:25 98%
DL 4019flown by SkyWest SUN 13:10 SLC 14:24 91%

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 4037flown by SkyWest SUN 07:20 SLC 08:25 1h 05m 363 98% 0.8% 282 min
DL 4019flown by SkyWest SUN 13:10 SLC 14:24 1h 14m 361 91% 0.6% 98 min
DL 3690flown by SkyWest SUN 15:15 SLC 16:24 1h 09m 55 89% 0.0% 96 min
DL 4454flown by SkyWest SUN 15:20 SLC 16:27 1h 07m 90 90% 0.0% 79 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 SUN SLC 1h 10m 94% 0.7% 1,078 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