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1,151 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: United’s BUF → IAD flights land within a few points of 85% on time whatever the hour.

Best time to leave 10–11 am 88% arrive on time from BUF
Best single flight UA 4270 BUF 19:52 → IAD 21:15 · 82% on time Avoid UA 4291 BUF 15:00 → IAD 16:23 · 79% 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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BUF
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82
% 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. CommuteAir, GoJet, Mesa, Republic) 1,151 85% 2.3% 118 min

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 4270flown by CommuteAir BUF 19:52 IAD 21:15 82%
UA 4291flown by CommuteAir BUF 15:00 IAD 16:23 79%

All 6 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 4534flown by GoJet BUF 06:09 IAD 07:27 1h 18m 15 93% 0.0% 75 min
UA 3668flown by Republic BUF 06:15 IAD 07:34 1h 19m 21 90% 4.8% 175 min
UA 4179flown by GoJet BUF 10:34 IAD 11:48 1h 14m 24 92% 0.0% 132 min
UA 3430flown by Republic BUF 10:34 IAD 11:50 1h 16m 42 88% 0.0% 89 min
UA 4291flown by CommuteAir BUF 15:00 IAD 16:23 1h 23m 274 79% 2.9% 93 min
UA 4270flown by CommuteAir BUF 19:52 IAD 21:15 1h 23m 203 82% 3.9% 107 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 BUF IAD 1h 21m 85% 2.3% 1,151 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