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5,602 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 93% depart on time. After 4 pm it’s 64%.

Best time to leave 5–6 am 96% arrive on time from DEN
Best single flight DL 341 DEN 05:45 → ATL 10:42 · 94% on time Avoid UA 1305 DEN 17:48 → ATL 22:57 · 72% 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
23
DEN
96
91
93
94
84
81
81
84
79
72
71
73
70
39
32
55
% 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
Atlanta flights leaving DEN 10–11 am: 3Close ×
UA 2424 DEN 10:00 ATL 15:10 3h 10m 226 85% 0.4% 61 min
WN 2258 DEN 10:15 ATL 15:20 3h 00m 58 64% 0.0% 42 min
DL 346 DEN 10:58 ATL 15:54 3h 00m 339 80% 1.2% 51 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 2,810 86% 1.2% 63 min
United 941 78% 0.4% 64 min
Frontier 775 78% 0.8% 62 min
Southwest 1,076 66% 0.7% 54 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 341 DEN 05:45 ATL 10:42 94%
DL 431 DEN 07:15 ATL 12:12 93%
DL 302 DEN 00:40 ATL 05:42 92%
F9 3294 DEN 06:30 ATL 11:38 88%
DL 995 DEN 12:25 ATL 17:26 86%
· · ·
UA 1671 DEN 13:26 ATL 18:30 79%
F9 3600 DEN 09:58 ATL 15:09 75%
UA 1305 DEN 17:48 ATL 22:57 72%
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.
Delta DEN ATL 3h 00m 86% 1.2% 2,810 Flying now
United DEN ATL 3h 04m 78% 0.4% 941 Flying now
Frontier DEN ATL 3h 10m 78% 0.8% 775 Flying now
Southwest DEN ATL 2h 50m 66% 0.7% 1,076 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