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Showing United only (incl. its regional partners)All airlines ×
1,630 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 12–1 pm 95% arrive on time from ATL
Best single flight UA 425 ATL 11:37 → IAH 12:47 · 89% on time Avoid UA 532 ATL 07:05 → IAH 08:15 · 89% 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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ATL
94
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76
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83
% 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 425 ATL 11:37 IAH 12:47 89%
UA 532 ATL 07:05 IAH 08:15 89%

All 6 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 532 ATL 07:05 IAH 08:15 2h 10m 206 89% 0.5% 84 min
UA 425 ATL 11:37 IAH 12:47 2h 10m 157 89% 0.0% 79 min
UA 3992flown by Mesa ATL 15:57 IAH 17:23 2h 26m 81 72% 0.0% 83 min
UA 521 ATL 16:04 IAH 17:25 2h 21m 88 83% 0.0% 98 min
UA 2376 ATL 18:57 IAH 20:15 2h 18m 47 60% 0.0% 54 min
UA 2474 ATL 18:57 IAH 20:15 2h 18m 27 37% 0.0% 137 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 ATL IAH 2h 27m 84% 0.7% 1,630 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