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3,430 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 93% depart on time. After 4 pm it’s 73%.

Best time to leave 7–8 am 93% arrive on time from IAH
Best single flight UA 1264 IAH 07:20 → LAS 08:35 · 95% on time Avoid F9 4131 IAH 13:17 → LAS 14:29 · 74% 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
9
10
11
12
13
14
15
16
17
18
19
20
21
22
IAH
93
89
72
92
85
80
82
80
84
67
75
73
67
71
72
% 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
Las Vegas flights leaving IAH 6–7 pm: 1Close ×
UA 2406 IAH 18:39 LAS 19:57 3h 18m 141 79% 0.0% 78 min

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 2,595 85% 0.3% 60 min
Spirit 466 82% 2.4% 76 min
Frontier 369 70% 3.0% 119 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 1264 IAH 07:20 LAS 08:35 95%
UA 1524 IAH 11:55 LAS 13:13 88%
UA 1799 IAH 10:55 LAS 12:14 88%
UA 1971 IAH 14:20 LAS 15:37 85%
F9 4131 IAH 13:17 LAS 14:29 74%
All 11 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 LAS 3h 29m 85% 0.3% 2,595 Flying now
Frontier IAH LAS 3h 21m 70% 3.0% 369 Flying now
Spirit IAH LAS 3h 19m 82% 2.4% 466 Not 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