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Showing United only (incl. its regional partners)All airlines ×
1,238 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 93% depart on time. After 4 pm it’s 4 in 5.

Best time to leave 12–1 pm 94% arrive on time from SEA
Best single flight UA 2135 SEA 07:05 → IAH 13:31 · 92% on time Avoid UA 2379 SEA 23:49 → IAH 06:10 · 84% 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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% 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 2135 SEA 07:05 IAH 13:31 92%
UA 2379 SEA 23:49 IAH 06:10 84%

All 5 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 2748 SEA 05:00 IAH 11:21 4h 21m 61 89% 0.0% 128 min
UA 2135 SEA 07:05 IAH 13:31 4h 26m 361 92% 0.6% 92 min
UA 2293 SEA 11:55 IAH 18:35 4h 40m 71 90% 0.0% 43 min
UA 1660 SEA 17:00 IAH 23:26 4h 26m 61 84% 0.0% 171 min
UA 2379 SEA 23:49 IAH 06:10 4h 21m 229 84% 0.4% 71 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 SEA IAH 4h 26m 87% 0.3% 1,238 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