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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: 9 in 10 depart on time. After 4 pm it’s 2 in 3.

Best time to leave 7–8 am 91% arrive on time from COS
Best single flight UA 4677 COS 07:45 → DEN 08:52 · 94% on time Avoid UA 4719 COS 17:07 → DEN 18:20 · 68% 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).

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COS
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% 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 4677flown by SkyWest COS 07:45 DEN 08:52 94%
UA 4696flown by SkyWest COS 07:05 DEN 08:10 90%
UA 5291flown by SkyWest COS 06:00 DEN 07:05 89%
UA 5400flown by SkyWest COS 10:23 DEN 11:38 88%
UA 5634flown by SkyWest COS 09:20 DEN 10:33 85%
· · ·
UA 4675flown by SkyWest COS 11:31 DEN 12:45 82%
UA 5391flown by SkyWest COS 18:32 DEN 19:45 72%
UA 4719flown by SkyWest COS 17:07 DEN 18:20 68%

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 4697flown by SkyWest COS 05:30 DEN 06:35 1h 05m 37 84% 0.0% 44 min
UA 5559flown by SkyWest COS 05:30 DEN 06:35 1h 05m 34 91% 0.0% 33 min
UA 5291flown by SkyWest COS 06:00 DEN 07:05 1h 05m 315 89% 0.6% 73 min
UA 4696flown by SkyWest COS 07:05 DEN 08:10 1h 05m 312 90% 0.6% 59 min
UA 4677flown by SkyWest COS 07:45 DEN 08:52 1h 07m 216 94% 1.4% 55 min
UA 4725flown by SkyWest COS 08:45 DEN 10:02 1h 17m 72 85% 0.0% 65 min
UA 5634flown by SkyWest COS 09:20 DEN 10:33 1h 13m 348 85% 0.3% 75 min
UA 5400flown by SkyWest COS 10:23 DEN 11:38 1h 15m 170 88% 0.6% 94 min
UA 4675flown by SkyWest COS 11:31 DEN 12:45 1h 14m 342 82% 2.3% 60 min
UA 5620flown by SkyWest COS 12:56 DEN 14:02 1h 06m 94 86% 4.3% 98 min
UA 730 COS 13:30 DEN 14:24 54m 32 69% 0.0% 68 min
UA 4647flown by SkyWest COS 13:49 DEN 14:55 1h 06m 191 83% 2.1% 84 min
UA 4657flown by SkyWest COS 15:02 DEN 16:15 1h 13m 71 66% 1.4% 126 min
UA 265 COS 15:42 DEN 16:45 1h 03m 35 59% 2.9% 99 min
UA 4719flown by SkyWest COS 17:07 DEN 18:20 1h 13m 303 68% 2.6% 68 min
UA 4645flown by SkyWest COS 17:07 DEN 18:20 1h 13m 36 61% 0.0% 94 min
UA 5391flown by SkyWest COS 18:32 DEN 19:45 1h 13m 206 72% 6.3% 100 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 COS DEN 1h 06m 82% 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