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6,440 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 2 in 3.

Best time to leave 6–7 am 88% arrive on time from ATL
Best single flight DL 1178 ATL 07:25 → ORD 08:35 · 88% on time Avoid DL 2879 ATL 17:21 → ORD 18:42 · 49% 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
88
91
91
82
82
86
76
84
74
76
66
67
73
68
64
65
69
% 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
Chicago flights leaving ATL 10–11 am: 2Close ×
UA 364 ATL 10:05 ORD 11:28 2h 23m 37 79% 8.1% 162 min
UA 1577 ATL 10:05 ORD 11:28 2h 23m 35 89% 0.0% 56 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, Republic) 1,684 76% 1.7% 93 min
American (incl. Envoy, PSA, SkyWest, Republic) 1,369 72% 3.1% 95 min
Delta 2,630 70% 2.3% 63 min
Frontier 712 65% 3.1% 112 min
Spirit 45 – 0.0% 32 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 1178 ATL 07:25 ORD 08:35 88%
UA 745 ATL 13:18 ORD 14:41 81%
DL 1147 ATL 09:02 ORD 10:13 80%
DL 1477 ATL 13:02 ORD 14:16 76%
AA 616 ATL 07:25 ORD 08:45 75%
· · ·
DL 1139 ATL 20:02 ORD 21:12 60%
F9 3397 ATL 18:22 ORD 19:52 58%
DL 2879 ATL 17:21 ORD 18:42 49%
All 24 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 ATL ORD 2h 18m 76% 1.7% 1,684 Flying now
American ATL ORD 2h 20m 72% 3.1% 1,369 Flying now
Delta ATL ORD 2h 10m 70% 2.3% 2,630 Flying now
Frontier ATL ORD 2h 30m 65% 3.1% 712 Flying now
Spirit ATL ORD 2h 11m 80% 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