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1,234 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 77%.

Best time to leave 5–6 am 88% arrive on time from GRR
Best single flight UA 2648 GRR 08:00 → DEN 08:54 · 77% 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.

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
United (incl. SkyWest) 728 79% 0.4% 87 min
Southwest 359 76% 0.3% 62 min
Frontier 147 – 0.0% 94 min

Dimmed: fewer than 150 flights in the year, too few to rank.

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 2648 GRR 08:00 DEN 08:54 77%

All 5 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 2648 GRR 08:00 DEN 08:54 2h 54m 216 77% 0.9% 94 min
UA 2745 GRR 15:37 DEN 16:30 2h 53m 148 73% 0.7% 119 min
WN 1893 GRR 15:45 DEN 16:35 2h 50m 42 59% 0.0% 67 min
WN 2471 GRR 17:50 DEN 18:40 2h 50m 16 12% 0.0% 80 min
F9 1247 GRR 20:29 DEN 21:29 3h 00m 125 84% 0.0% 74 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.
Frontier GRR DEN 3h 00m 80% 0.0% 147 Flying now
United GRR DEN 3h 01m 79% 0.4% 728 Flying now
Southwest GRR DEN 2h 55m 76% 0.3% 359 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