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2,545 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 88% depart on time. After 4 pm it’s 3 in 5.

Best time to leave 6–7 am 94% arrive on time from ORD
Best single flight UA 4382 ORD 10:25 → BUF 13:13 · 73% on time Avoid UA 1335 ORD 18:17 → BUF 21:03 · 66% 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).

6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
ORD
96
88
86
79
77
77
74
81
67
69
50
54
52
% 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
Buffalo flights leaving ORD 7–8 pm: 1Close ×
AA 564 ORD 19:59 BUF 22:47 1h 48m 135 57% 0.7% 95 min

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. GoJet, SkyWest, Republic) 1,316 73% 2.8% 87 min
American (incl. Envoy, SkyWest, Republic) 1,229 71% 3.3% 76 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 4382flown by GoJet ORD 10:25 BUF 13:13 73%
UA 1335 ORD 18:17 BUF 21:03 66%
All 10 flights on this route →

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 ORD BUF 1h 46m 73% 2.8% 1,316 Flying now
American ORD BUF 1h 43m 71% 3.3% 1,229 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