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2,893 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 95% depart on time. After 4 pm it’s 78%.

Best time to leave 7–8 am 94% arrive on time from IAH
Best single flight UA 2250 IAH 07:20 → SAT 08:27 · 92% on time Avoid UA 1477 IAH 18:42 → SAT 19:50 · 74% 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).

7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
IAH
95
91
95
82
85
86
72
76
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 Antonio flights leaving IAH 8–9 pm: 1Close ×
UA 1542 IAH 20:05 SAT 21:13 1h 08m 340 77% 0.3% 55 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 (incl. SkyWest, Mesa) 2,893 83% 0.6% 62 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 2250 IAH 07:20 SAT 08:27 92%
UA 697 IAH 14:31 SAT 15:39 84%
UA 1542 IAH 20:05 SAT 21:13 77%
UA 1477 IAH 18:42 SAT 19:50 74%
All 9 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 SAT 1h 08m 83% 0.6% 2,893 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