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6,442 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 3 in 5.

Best time to leave 6–7 am 87% arrive on time from ORD
Best single flight DL 1264 ORD 05:30 → ATL 08:33 · 91% on time Avoid UA 1398 ORD 18:20 → ATL 21:41 · 58% 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
ORD
89
91
89
82
85
83
79
71
77
73
69
64
66
60
53
60
% 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 ORD 1–2 pm: 5Close ×
F9 2198 ORD 13:29 ATL 16:50 2h 21m 123 64% 4.1% 103 min
AA 4759flown by Republic ORD 13:35 ATL 16:47 2h 12m 66 68% 3.0% 69 min
F9 1442 ORD 13:40 ATL 17:01 2h 22m 174 62% 4.0% 114 min
DL 2894 ORD 13:46 ATL 16:54 2h 08m 61 72% 0.0% 80 min
UA 356 ORD 13:55 ATL 17:10 2h 15m 358 75% 2.2% 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.
Delta 2,628 81% 2.5% 87 min
United (incl. SkyWest, Republic) 1,684 76% 1.4% 69 min
American (incl. Envoy, PSA, SkyWest, Republic) 1,370 70% 2.7% 79 min
Frontier 715 69% 3.5% 104 min
Spirit 45 – 0.0% 139 min

Dimmed: fewer than 150 flights in the year, too few to rank.

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 1264 ORD 05:30 ATL 08:33 91%
DL 1247 ORD 06:35 ATL 09:41 88%
DL 1178 ORD 09:45 ATL 12:51 87%
DL 1147 ORD 11:23 ATL 14:25 80%
DL 1477 ORD 15:22 ATL 18:36 76%
· · ·
DL 2738 ORD 18:10 ATL 21:26 68%
F9 1442 ORD 13:40 ATL 17:01 62%
UA 1398 ORD 18:20 ATL 21:41 58%
All 25 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 ORD ATL 2h 06m 81% 2.5% 2,628 Flying now
United ORD ATL 2h 11m 76% 1.4% 1,684 Flying now
American ORD ATL 2h 06m 70% 2.7% 1,370 Flying now
Frontier ORD ATL 2h 22m 69% 3.5% 715 Flying now
Spirit ORD ATL 1h 59m 78% 0.0% 45 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