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5,282 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 7 in 10.

Best time to leave 7–8 am 90% arrive on time from IAH
Best single flight UA 1030 IAH 07:20 → ATL 10:39 · 93% on time Avoid F9 2400 IAH 20:02 → ATL 23:24 · 55% 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
IAH
92
85
91
85
76
72
82
73
82
77
83
70
70
68
75
73
% 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
Atlanta flights leaving IAH 9–10 am: 1Close ×
DL 1585 IAH 09:42 ATL 12:48 2h 06m 324 78% 4.3% 60 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) 1,630 82% 0.6% 67 min
Delta 2,520 81% 2.1% 69 min
Spirit 334 76% 4.8% 60 min
Frontier 798 63% 2.9% 70 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 1030 IAH 07:20 ATL 10:39 93%
DL 1069 IAH 05:40 ATL 08:43 93%
DL 1315 IAH 07:02 ATL 10:05 88%
DL 2709 IAH 08:05 ATL 11:09 84%
DL 1572 IAH 14:43 ATL 17:54 80%
· · ·
DL 1682 IAH 12:13 ATL 15:23 76%
F9 1404 IAH 06:10 ATL 09:41 68%
F9 2400 IAH 20:02 ATL 23:24 55%
All 21 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 ATL 2h 11m 82% 0.6% 1,630 Flying now
Delta IAH ATL 2h 07m 81% 2.1% 2,520 Flying now
Frontier IAH ATL 2h 22m 63% 2.9% 798 Flying now
Spirit IAH ATL 2h 00m 76% 4.8% 334 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