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Showing United only (incl. its regional partners)All airlines ×
1,908 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 94% depart on time. After 4 pm it’s 82%.

Best time to leave 5–6 am 98% arrive on time from SEA
Best single flight UA 1505 SEA 08:56 → DEN 12:45 · 92% on time Avoid UA 1218 SEA 19:54 → DEN 23:38 · 84% 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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% 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 1505 SEA 08:56 DEN 12:45 92%
UA 757 SEA 11:02 DEN 14:51 88%
UA 1218 SEA 19:54 DEN 23:38 84%

All 10 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 2601 SEA 05:00 DEN 08:43 2h 43m 135 96% 0.7% 89 min
UA 1915 SEA 05:07 DEN 08:50 2h 43m 35 100% 0.0% –
UA 1505 SEA 08:56 DEN 12:45 2h 49m 345 92% 0.9% 121 min
UA 757 SEA 11:02 DEN 14:51 2h 49m 365 88% 0.8% 66 min
UA 1715 SEA 11:02 DEN 14:51 2h 49m 35 89% 0.0% 72 min
UA 1351 SEA 12:50 DEN 16:42 2h 52m 124 89% 0.0% 64 min
UA 333 SEA 14:33 DEN 18:22 2h 49m 32 66% 0.0% 53 min
UA 655 SEA 14:36 DEN 18:25 2h 49m 30 70% 0.0% 73 min
UA 325 SEA 15:40 DEN 19:29 2h 49m 36 86% 0.0% 43 min
UA 1218 SEA 19:54 DEN 23:38 2h 44m 185 84% 0.5% 73 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 SEA DEN 2h 47m 89% 0.7% 1,908 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