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Showing United only (incl. its regional partners)All airlines ×
1,259 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: United’s IAD → ROC flights land within a few points of 4 in 5 on time whatever the hour.

Best time to leave 8–9 am 87% arrive on time from IAD
Best single flight UA 4871 IAD 17:30 → ROC 19:05 · 75% 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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IAD
% 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 4871flown by CommuteAir IAD 17:30 ROC 19:05 75%

All 7 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 4615flown by GoJet IAD 08:25 ROC 09:52 1h 27m 31 90% 0.0% 61 min
UA 4873flown by CommuteAir IAD 08:25 ROC 09:53 1h 28m 29 93% 3.4% 126 min
UA 4864flown by CommuteAir IAD 12:50 ROC 14:19 1h 29m 30 79% 0.0% 130 min
UA 4485flown by GoJet IAD 12:50 ROC 14:18 1h 28m 27 92% 7.4% 29 min
UA 4871flown by CommuteAir IAD 17:30 ROC 19:05 1h 35m 165 75% 6.1% 82 min
UA 4394flown by GoJet IAD 22:37 ROC 23:58 1h 21m 34 82% 2.9% 113 min
UA 4841flown by CommuteAir IAD 22:37 ROC 23:59 1h 22m 34 82% 2.9% 33 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 IAD ROC 1h 27m 81% 2.5% 1,259 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