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6,131 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 2 in 3.

Best time to leave 8–9 am 92% arrive on time from DEN
Best single flight UA 1377 DEN 06:00 → ORD 09:42 · 89% on time Avoid UA 1411 DEN 18:00 → ORD 21:39 · 50% 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
DEN
94
90
93
84
78
81
73
79
68
80
76
61
57
65
70
71
% 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 DEN 6–7 pm: 1Close ×
UA 1411 DEN 18:00 ORD 21:39 2h 39m 256 50% 0.8% 105 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.
American (incl. Envoy) 1,599 74% 1.8% 118 min
United 3,815 73% 0.8% 80 min
Southwest 389 69% 0.5% 59 min
Frontier 328 67% 2.1% 86 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.
UA 1377 DEN 06:00 ORD 09:42 89%
UA 2430 DEN 08:00 ORD 11:44 88%
AA 2771 DEN 07:05 ORD 10:45 88%
UA 2329 DEN 09:35 ORD 13:15 84%
UA 2865 DEN 11:15 ORD 14:55 82%
· · ·
UA 1023 DEN 15:01 ORD 18:46 61%
UA 675 DEN 16:29 ORD 20:14 58%
UA 1411 DEN 18:00 ORD 21:39 50%
All 22 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.
American DEN ORD 2h 40m 74% 1.8% 1,599 Flying now
United DEN ORD 2h 39m 73% 0.8% 3,815 Flying now
Frontier DEN ORD 2h 38m 67% 2.1% 328 Flying now
Southwest DEN ORD 2h 30m 69% 0.5% 389 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