Showing Delta only (incl. its regional partners)All airlines ×

1,012 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 4 in 5.

Best time to leave 2–3 pm 90% arrive on time from IAH

Best single flight DL 1532 IAH 14:20 → SLC 16:35 · 86% on time Avoid DL 1299 IAH 19:01 → SLC 21:15 · 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).

IAH

% 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 1532	IAH 14:20	SLC 16:35	86%
DL 1583	IAH 07:35	SLC 09:51	86%
DL 1299	IAH 19:01	SLC 21:15	79%

All 3 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 1583	IAH 07:35	SLC 09:51	3h 16m	365	86%	0.3%	113 min
DL 1532	IAH 14:20	SLC 16:35	3h 15m	320	86%	0.6%	56 min
DL 1299	IAH 19:01	SLC 21:15	3h 14m	178	79%	0.0%	109 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	IAH	SLC	3h 16m	84%	0.3%	1,012	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