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Showing United only (incl. its regional partners)All airlines ×
4,895 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: airports and hours on this route all land within a few points of 88% on time.

Best time to leave 5–6 am 96% arrive on time from LAX, 90% arrive on time from ONT
Best airport pair ONT → IAH 91% on time, 0.5% cancelled, 365 flights
Best single flight UA 654 LAX 05:45 → IAH 11:12 · 96% on time Avoid UA 1591 LAX 13:10 → IAH 18:39 · 73% 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).

5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
LAX
96
96
96
95
91
92
90
92
81
81
89
82
83
88
91
SNA
97
97
76
91
87
ONT
92
91
% 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 654 LAX 05:45 IAH 11:12 96%
UA 491 LAX 00:51 IAH 06:12 92%
UA 1416 LAX 08:10 IAH 13:40 91%
UA 1936 ONT 05:45 IAH 11:04 91%
UA 1680 LAX 19:21 IAH 00:50 87%
· · ·
UA 2086 LAX 11:54 IAH 17:22 86%
UA 2403 LAX 17:45 IAH 23:14 82%
UA 1591 LAX 13:10 IAH 18:39 73%

All 16 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 491 LAX 00:51 IAH 06:12 3h 21m 286 92% 0.7% 41 min
UA 654 LAX 05:45 IAH 11:12 3h 27m 249 96% 0.0% 46 min
UA 1936 ONT 05:45 IAH 11:04 3h 19m 365 91% 0.5% 94 min
UA 1397 LAX 07:05 IAH 12:34 3h 29m 140 94% 0.0% 34 min
UA 700 SNA 07:45 IAH 13:07 3h 22m 149 93% 0.0% 94 min
UA 1416 LAX 08:10 IAH 13:40 3h 30m 320 91% 0.0% 56 min
UA 277 LAX 10:10 IAH 15:40 3h 30m 149 88% 0.0% 85 min
UA 2086 LAX 11:54 IAH 17:22 3h 28m 284 86% 0.0% 56 min
UA 2044 SNA 11:58 IAH 17:20 3h 22m 35 74% 0.0% 74 min
UA 2050 SNA 11:58 IAH 17:20 3h 22m 36 64% 0.0% 90 min
UA 1591 LAX 13:10 IAH 18:39 3h 29m 170 73% 0.0% 57 min
UA 643 SNA 15:05 IAH 20:27 3h 22m 201 87% 0.0% 55 min
UA 2377 LAX 15:20 IAH 20:49 3h 29m 361 87% 0.6% 64 min
UA 2403 LAX 17:45 IAH 23:14 3h 29m 154 82% 0.0% 47 min
UA 1680 LAX 19:21 IAH 00:50 3h 29m 182 87% 0.0% 69 min
UA 387 LAX 19:21 IAH 00:50 3h 29m 33 91% 0.0% 110 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 ONT IAH 3h 19m 91% 0.5% 365 Flying now
United SNA IAH 3h 12m 88% 0.0% 1,092 Flying now
United LAX IAH 3h 21m 88% 0.2% 3,438 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