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Showing United only (incl. its regional partners)All airlines ×
1,618 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: United’s IAH → BHM flights land within a few points of 84% on time whatever the hour.

Best time to leave 8–9 am 87% arrive on time from IAH
Best single flight UA 4231 IAH 07:35 → BHM 09:31 · 88% on time Avoid UA 4256 IAH 16:20 → BHM 18:18 · 82% 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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IAH
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84
% 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 4231flown by CommuteAir IAH 07:35 BHM 09:31 88%
UA 4256flown by CommuteAir IAH 16:20 BHM 18:18 82%

All 7 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 4231flown by CommuteAir IAH 07:35 BHM 09:31 1h 56m 185 88% 0.5% 66 min
UA 4845flown by CommuteAir IAH 12:10 BHM 14:09 1h 59m 35 66% 0.0% 75 min
UA 4263flown by CommuteAir IAH 12:10 BHM 14:09 1h 59m 28 85% 0.0% 56 min
UA 6120flown by Mesa IAH 14:25 BHM 16:20 1h 55m 43 91% 0.0% 132 min
UA 4239flown by CommuteAir IAH 14:25 BHM 16:22 1h 57m 50 70% 6.0% 70 min
UA 4256flown by CommuteAir IAH 16:20 BHM 18:18 1h 58m 155 82% 1.3% 70 min
UA 4022flown by Mesa IAH 19:55 BHM 21:53 1h 58m 62 74% 0.0% 59 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 IAH BHM 1h 54m 84% 0.9% 1,618 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