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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 3–4 pm: 1Close ×
UA 1023 DEN 15:01 ORD 18:46 2h 45m 364 61% 0.3% 76 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