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1,696 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: United’s IAH → SAN flights land within a few points of 82% on time whatever the hour.

Best time to leave 4–5 pm 86% arrive on time from IAH
Best single flight UA 2491 IAH 09:30 → SAN 10:51 · 86% on time Avoid UA 2399 IAH 12:00 → SAN 13:21 · 83% 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
85
81
81
84
77
66
78
% 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
San Diego flights leaving IAH 9–10 am: 1Close ×
UA 2491 IAH 09:30 SAN 10:51 3h 21m 365 86% 0.3% 54 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.
United 1,696 82% 0.2% 57 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 2491 IAH 09:30 SAN 10:51 86%
UA 2399 IAH 12:00 SAN 13:21 83%
All 7 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.
United IAH SAN 3h 30m 82% 0.2% 1,696 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