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6,261 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 92% depart on time. After 4 pm it’s 3 in 5.

Best time to leave 6–7 am 94% arrive on time from MIA
Best single flight DL 1261 MIA 08:17 → ATL 10:20 · 93% on time Avoid AA 1045 MIA 20:04 → ATL 22:09 · 57% 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
21
22
MIA
93
95
91
90
83
83
81
79
72
73
65
62
65
56
59
57
61
64
% 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.
Delta 3,308 78% 1.8% 83 min
Spirit 252 75% 4.4% 66 min
Frontier 896 70% 1.8% 84 min
American (incl. Envoy, Republic) 1,805 70% 0.8% 82 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 1261 MIA 08:17 ATL 10:20 93%
DL 1249 MIA 06:00 ATL 08:05 93%
DL 1211 MIA 07:10 ATL 09:15 93%
DL 2836 MIA 10:40 ATL 12:48 85%
DL 1510 MIA 12:02 ATL 14:09 82%
· · ·
DL 1386 MIA 18:05 ATL 20:22 59%
F9 4405 MIA 17:28 ATL 20:00 57%
AA 1045 MIA 20:04 ATL 22:09 57%
All 20 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 MIA ATL 2h 10m 78% 1.8% 3,308 Flying now
Frontier MIA ATL 2h 30m 70% 1.8% 896 Flying now
American MIA ATL 2h 04m 70% 0.8% 1,805 Flying now
Spirit MIA ATL 1h 58m 75% 4.4% 252 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