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5,291 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 88% depart on time. After 4 pm it’s 2 in 3.

Best time to leave 11 am–12 pm 88% arrive on time from ATL
Best single flight UA 425 ATL 11:37 → IAH 12:47 · 89% on time Avoid DL 1131 ATL 18:39 → IAH 19:52 · 59% 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).

6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
ATL
75
91
87
83
77
89
85
85
70
74
66
74
65
78
60
53
72
% 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.

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) 1,630 84% 0.7% 75 min
Delta 2,521 76% 1.9% 57 min
Frontier 798 71% 1.9% 84 min
Spirit 342 66% 5.0% 81 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 425 ATL 11:37 IAH 12:47 89%
UA 532 ATL 07:05 IAH 08:15 89%
DL 1572 ATL 12:30 IAH 13:38 86%
DL 1682 ATL 10:05 IAH 11:18 83%
DL 1585 ATL 07:30 IAH 08:37 81%
· · ·
DL 1223 ATL 16:25 IAH 17:39 68%
F9 4075 ATL 21:25 IAH 22:48 63%
DL 1131 ATL 18:39 IAH 19:52 59%

All 18 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.
F9 1403 ATL 06:07 IAH 07:23 2h 16m 325 76% 1.2% 82 min
UA 532 ATL 07:05 IAH 08:15 2h 10m 206 89% 0.5% 84 min
DL 1585 ATL 07:30 IAH 08:37 2h 07m 327 81% 4.3% 40 min
F9 2399 ATL 08:45 IAH 10:07 2h 22m 136 79% 1.5% 55 min
DL 1682 ATL 10:05 IAH 11:18 2h 13m 343 83% 1.5% 55 min
UA 425 ATL 11:37 IAH 12:47 2h 10m 157 89% 0.0% 79 min
DL 1148 ATL 12:00 IAH 13:14 2h 14m 31 71% 0.0% 48 min
DL 1572 ATL 12:30 IAH 13:38 2h 08m 199 86% 0.5% 44 min
DL 2890 ATL 14:46 IAH 15:56 2h 12m 148 69% 0.0% 52 min
UA 3992flown by Mesa ATL 15:57 IAH 17:23 2h 26m 81 72% 0.0% 83 min
UA 521 ATL 16:04 IAH 17:25 2h 21m 88 83% 0.0% 98 min
DL 1223 ATL 16:25 IAH 17:39 2h 14m 157 68% 2.5% 59 min
DL 1131 ATL 18:39 IAH 19:52 2h 13m 189 59% 1.1% 68 min
UA 2376 ATL 18:57 IAH 20:15 2h 18m 47 60% 0.0% 54 min
UA 2474 ATL 18:57 IAH 20:15 2h 18m 27 37% 0.0% 137 min
DL 1284 ATL 20:21 IAH 21:34 2h 13m 356 73% 2.0% 69 min
F9 4075 ATL 21:25 IAH 22:48 2h 23m 334 63% 2.7% 92 min
DL 1601 ATL 22:44 IAH 23:56 2h 12m 365 76% 2.5% 53 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 ATL IAH 2h 27m 84% 0.7% 1,630 Flying now
Delta ATL IAH 2h 13m 76% 1.9% 2,521 Flying now
Frontier ATL IAH 2h 22m 71% 1.9% 798 Flying now
Spirit ATL IAH 2h 18m 66% 5.0% 342 Not 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