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3,526 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 63%.

Best time to leave 6–7 am 96% arrive on time from ATL
Best single flight DL 2417 ATL 11:05 → MDW 12:05 · 88% on time Avoid F9 2779 ATL 10:05 → MDW 11:07 · 64% 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
95
85
85
82
77
83
75
82
62
81
77
60
64
48
62
63
68
% 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 9–10 pm: 2Close ×
F9 2291 ATL 21:00 MDW 22:03 2h 04m 288 68% 2.4% 92 min
DL 1076 ATL 21:15 MDW 22:17 2h 02m 365 77% 2.5% 72 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 1,362 83% 2.4% 57 min
Southwest 1,543 76% 1.5% 60 min
Frontier 621 66% 2.4% 94 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.
DL 2417 ATL 11:05 MDW 12:05 88%
DL 1063 ATL 09:09 MDW 10:09 88%
DL 1076 ATL 21:15 MDW 22:17 77%
F9 2291 ATL 21:00 MDW 22:03 68%
F9 2779 ATL 10:05 MDW 11:07 64%
All 13 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 ATL MDW 2h 00m 83% 2.4% 1,362 Flying now
Southwest ATL MDW 1h 55m 76% 1.5% 1,543 Flying now
Frontier ATL MDW 2h 04m 66% 2.4% 621 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