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 SLC → SUN flights land within a few points of 94% on time whatever the hour.

Best time to leave 9–10 pm 97% arrive on time from SLC

Best single flight DL 3985 SLC 21:05 → SUN 22:09 · 96% on time Avoid DL 4454 SLC 13:30 → SUN 14:34 · 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).

SLC

% 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 3985flown by SkyWest	SLC 21:05	SUN 22:09	96%
DL 3973flown by SkyWest	SLC 11:15	SUN 12:29	92%
DL 4454flown by SkyWest	SLC 13:30	SUN 14:34	89%

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 3973flown by SkyWest	SLC 11:15	SUN 12:29	1h 14m	361	92%	0.6%	75 min
DL 3689flown by SkyWest	SLC 13:25	SUN 14:34	1h 09m	55	89%	0.0%	46 min
DL 4454flown by SkyWest	SLC 13:30	SUN 14:34	1h 04m	150	89%	1.3%	52 min
DL 3985flown by SkyWest	SLC 21:05	SUN 22:09	1h 04m	222	96%	0.9%	48 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	SLC	SUN	1h 09m	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