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9,038 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 72%.

Best time to leave 6–7 am 98% arrive on time from HOU, 96% arrive on time from IAH
Best airport pair IAH → SNA 88% on time, fewest cancelled (0.0%), 1,092 flights
Best single flight DL 1216 IAH 07:10 → LAX 08:39 · 94% on time Avoid F9 1755 IAH 16:02 → LAX 17:30 · 75% on time

Time of day × airport

Share of flights leaving within 15 minutes, by scheduled departure hour: all flights from that airport, wherever they’re going. Blank: fewer than 40 flights.

5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
IAH
92
91
91
87
86
83
83
84
77
81
76
78
72
74
71
76
79
81
85
HOU
94
95
93
90
91
85
82
73
74
65
65
67
64
66
56
62
61
55
% leaving within 15 min, all flights from that airport: 85+75–8465–7455–64under 55

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
Delta IAH→LAX only 646 89% 1.1% 77 min
United 4,896 86% 0.2% 56 min
Spirit IAH→LAX only 394 82% 1.3% 72 min
American (incl. SkyWest) IAH→LAX only 409 81% 0.5% 80 min
Southwest 2,165 79% 0.2% 48 min
Frontier 528 76% 0.8% 61 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.
DL 1216 IAH 07:10 LAX 08:39 94%
UA 2600 IAH 07:20 LAX 08:57 91%
UA 1383 IAH 09:30 SNA 10:59 91%
UA 469 IAH 09:53 LAX 11:30 89%
UA 1945 IAH 14:54 LAX 16:27 89%
· · ·
F9 3131 IAH 06:10 ONT 07:32 78%
UA 2095 IAH 20:15 LAX 21:54 76%
F9 1755 IAH 16:02 LAX 17:30 75%
All 36 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.
Delta IAH LAX 3h 41m 89% 1.1% 646 Flying now
United IAH SNA 3h 41m 88% 0.0% 1,092 Flying now
Southwest HOU LGB 3h 28m 87% 0.4% 461 Flying now
United IAH LAX 3h 37m 85% 0.3% 3,439 Flying now
American IAH LAX 3h 46m 81% 0.5% 409 Flying now
Southwest HOU ONT 3h 25m 80% 0.3% 362 Flying now
United IAH ONT 3h 26m 79% 0.0% 365 Flying now
Frontier IAH ONT 3h 31m 78% 0.5% 196 Flying now
Frontier IAH LAX 3h 36m 75% 0.9% 332 Flying now
Southwest HOU LAX 3h 35m 75% 0.1% 1,195 Flying now
Southwest HOU BUR 3h 35m 82% 0.0% 147 Not flying now
Spirit IAH LAX 3h 41m 82% 1.3% 394 Not flying now
Pick a date and this becomes a forecast Coming soon: within 3 days of travel, the same ranking will use that day’s weather and our odds for each flight.

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