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Showing United only (incl. its regional partners)All airlines ×
3,879 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 86% depart on time. After 4 pm it’s 7 in 10.

Best time to leave 12–1 pm 89% arrive on time from DEN
Best single flight UA 4745 DEN 23:09 → COS 23:59 · 87% on time Avoid UA 5308 DEN 16:55 → COS 17:52 · 66% 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).

7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
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23
DEN
86
87
85
73
83
87
82
83
70
70
60
69
60
75
81
87
% 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.

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 4745flown by SkyWest DEN 23:09 COS 23:59 87%
UA 5246flown by SkyWest DEN 07:45 COS 08:41 85%
UA 5306flown by SkyWest DEN 09:45 COS 10:46 83%
UA 4734flown by SkyWest DEN 11:21 COS 12:21 81%
UA 5546flown by SkyWest DEN 15:35 COS 16:32 81%
· · ·
UA 4793flown by SkyWest DEN 19:05 COS 20:01 74%
UA 5861flown by SkyWest DEN 17:55 COS 18:54 68%
UA 5308flown by SkyWest DEN 16:55 COS 17:52 66%

All 17 United flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.
UA 5246flown by SkyWest DEN 07:45 COS 08:41 56m 352 85% 0.3% 51 min
UA 5306flown by SkyWest DEN 09:45 COS 10:46 1h 01m 324 83% 2.5% 69 min
UA 4734flown by SkyWest DEN 11:21 COS 12:21 1h 00m 193 81% 4.1% 63 min
UA 5947flown by SkyWest DEN 11:32 COS 12:28 56m 62 92% 0.0% 32 min
UA 1111 DEN 11:32 COS 12:23 51m 32 75% 0.0% 84 min
UA 5614flown by SkyWest DEN 12:18 COS 13:14 56m 90 87% 1.1% 65 min
UA 4775flown by SkyWest DEN 13:30 COS 14:27 57m 37 73% 0.0% 63 min
UA 1803 DEN 13:48 COS 14:40 52m 35 74% 2.9% 96 min
UA 5546flown by SkyWest DEN 15:35 COS 16:32 57m 363 81% 2.2% 61 min
UA 5308flown by SkyWest DEN 16:55 COS 17:52 57m 229 66% 4.8% 90 min
UA 5861flown by SkyWest DEN 17:55 COS 18:54 59m 347 68% 0.3% 80 min
UA 4793flown by SkyWest DEN 19:05 COS 20:01 56m 196 74% 1.0% 59 min
UA 5669flown by SkyWest DEN 19:50 COS 20:46 56m 111 84% 0.0% 100 min
UA 5292flown by SkyWest DEN 20:30 COS 21:26 56m 11 45% 0.0% 78 min
UA 4744flown by SkyWest DEN 20:30 COS 21:26 56m 36 28% 0.0% 70 min
UA 4650flown by SkyWest DEN 21:10 COS 22:06 56m 322 76% 1.6% 75 min
UA 4745flown by SkyWest DEN 23:09 COS 23:59 50m 186 87% 0.0% 64 min

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 DEN COS 56m 78% 1.4% 3,879 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