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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).

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DEN
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% 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
Houston flights leaving DEN 1–2 pm: 1Close ×
UA 1829 DEN 13:30 IAH 17:04 2h 34m 328 73% 0.3% 62 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.

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 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.

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