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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
Denver flights leaving ATL 6–7 pm: 1Close ×
WN 3002 ATL 18:20 DEN 19:40 3h 20m 58 44% 0.0% 86 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 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