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4,715 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 94% depart on time. After 4 pm it’s 3 in 4.

Best time to leave 5–6 am 97% arrive on time from DEN
Best single flight UA 320 DEN 05:00 → IAH 08:32 · 97% on time Avoid UA 1829 DEN 13:30 → IAH 17:04 · 73% 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).

5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
DEN
96
92
92
88
86
84
82
84
81
77
73
76
74
69
% 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.
Frontier 816 81% 0.2% 58 min
United 3,899 80% 0.3% 63 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 320 DEN 05:00 IAH 08:32 97%
UA 1720 DEN 07:42 IAH 11:15 92%
F9 3206 DEN 07:00 IAH 10:42 87%
UA 2419 DEN 20:28 IAH 23:59 80%
UA 489 DEN 15:35 IAH 19:10 78%
· · ·
F9 2996 DEN 21:06 IAH 00:44 76%
UA 475 DEN 19:35 IAH 23:06 75%
UA 1829 DEN 13:30 IAH 17:04 73%

All 17 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.
UA 320 DEN 05:00 IAH 08:32 2h 32m 364 97% 0.5% 64 min
F9 3206 DEN 07:00 IAH 10:42 2h 42m 315 87% 0.3% 46 min
UA 1720 DEN 07:42 IAH 11:15 2h 33m 365 92% 0.3% 41 min
UA 2841 DEN 10:07 IAH 13:40 2h 33m 35 74% 0.0% 32 min
UA 1129 DEN 10:07 IAH 13:40 2h 33m 37 70% 0.0% 40 min
UA 1599 DEN 11:34 IAH 15:09 2h 35m 170 78% 0.6% 82 min
UA 1829 DEN 13:30 IAH 17:04 2h 34m 328 73% 0.3% 62 min
UA 489 DEN 15:35 IAH 19:10 2h 35m 327 78% 0.0% 64 min
UA 588 DEN 16:20 IAH 19:57 2h 37m 170 78% 0.0% 62 min
UA 1585 DEN 17:18 IAH 20:55 2h 37m 61 74% 0.0% 73 min
F9 3228 DEN 17:35 IAH 21:14 2h 43m 105 76% 1.0% 65 min
UA 2791 DEN 18:05 IAH 21:36 2h 31m 37 56% 2.7% 111 min
UA 2018 DEN 18:05 IAH 21:36 2h 31m 35 57% 0.0% 42 min
UA 475 DEN 19:35 IAH 23:06 2h 31m 364 75% 0.0% 65 min
UA 2419 DEN 20:28 IAH 23:59 2h 31m 338 80% 0.0% 63 min
F9 2996 DEN 21:06 IAH 00:44 2h 38m 332 76% 0.0% 63 min
UA 1253 DEN 21:10 IAH 00:41 2h 31m 56 67% 1.8% 56 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.
Frontier DEN IAH 2h 38m 81% 0.2% 816 Flying now
United DEN IAH 2h 31m 80% 0.3% 3,899 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