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5,595 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 6–7 am 92% arrive on time from ATL
Best single flight DL 2235 ATL 07:25 → DEN 08:35 · 93% on time Avoid F9 3599 ATL 20:40 → DEN 22:16 · 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
23
ATL
92
84
93
91
79
88
81
80
74
77
77
54
61
65
65
78
81
81
% 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.
United 941 86% 0.5% 84 min
Delta 2,810 80% 1.2% 52 min
Southwest 1,075 74% 1.1% 57 min
Frontier 769 73% 1.3% 84 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 2235 ATL 07:25 DEN 08:35 93%
UA 340 ATL 07:30 DEN 08:51 91%
UA 1327 ATL 11:10 DEN 12:28 91%
DL 706 ATL 11:45 DEN 12:59 87%
DL 995 ATL 09:50 DEN 11:07 86%
· · ·
DL 519 ATL 16:39 DEN 17:56 69%
F9 1449 ATL 07:40 DEN 09:03 69%
F9 3599 ATL 20:40 DEN 22:16 64%
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 ATL DEN 3h 21m 86% 0.5% 941 Flying now
Delta ATL DEN 3h 19m 80% 1.2% 2,810 Flying now
Southwest ATL DEN 3h 20m 74% 1.1% 1,075 Flying now
Frontier ATL DEN 3h 27m 73% 1.3% 769 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