2,181 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 77%.

Best time to leave 11 am–12 pm 87% arrive on time from IAH

Best single flight UA 2242 IAH 09:45 → SLC 11:59 · 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.

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.


United (incl. SkyWest, Mesa)	1,169	84%	0.5%	56 min
Delta	1,012	84%	0.3%	93 min

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.


UA 2242	IAH 09:45	SLC 11:59	86%
DL 1532	IAH 14:20	SLC 16:35	86%
DL 1583	IAH 07:35	SLC 09:51	86%
UA 2157	IAH 20:25	SLC 22:43	79%
DL 1299	IAH 19:01	SLC 21:15	79%

All 8 flights on this route →

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.


United	IAH	SLC	3h 25m	84%	0.5%	1,169	Flying now
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