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Showing United only (incl. its regional partners)All airlines ×
3,899 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 95% 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).

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DEN
97
93
88
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84
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84
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77
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75
68
% 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.
UA 320 DEN 05:00 IAH 08:32 97%
UA 1720 DEN 07:42 IAH 11:15 92%
UA 2419 DEN 20:28 IAH 23:59 80%
UA 489 DEN 15:35 IAH 19:10 78%
UA 1599 DEN 11:34 IAH 15:09 78%
· · ·
UA 588 DEN 16:20 IAH 19:57 78%
UA 475 DEN 19:35 IAH 23:06 75%
UA 1829 DEN 13:30 IAH 17:04 73%

All 14 United 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
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
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
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.
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