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Any day
Saturday, October 10 · typical odds for a Saturday (too early for a weather forecast) · issued Sun 8:00 PM ET · connections flying that day

Sat, Oct 10: one nonstop, B6 634 at 12:52, with a 22% chance of arriving 15+ min late.

Nonstops that day

All 1 nonstop →
B6 634 JetBlue Flight history → SJU 12:52 BUF 17:41 22% 8% 1.0% 85%

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Buffalo on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival. Layovers up to 4 hours. Pick a connection for its 12-month details.
DeltaDetails → SJU 14:21 → DTW 19:03DL 1913 2h 32m Detroit DTW 21:35 → BUF 22:45DL 978 8h 24m 99% 82%
JetBlueDetails → SJU 06:00 → BOS 10:05B6 562 2h 00m Boston BOS 12:05 → BUF 13:52B6 915 7h 52m 96% 79%
DeltaDetails → SJU 07:30 → ATL 11:14DL 1763 2h 56m Atlanta ATL 14:10 → BUF 16:13DL 2266 8h 43m 99% 79%
DeltaDetails → SJU 07:20 → JFK 11:19DL 1854 2h 10m New York JFK 13:29 → BUF 15:09DL 5296 · flown by Endeavor 7h 49m 98% 77%
DeltaDetails → SJU 14:42 → ATL 18:36DL 1882 2h 59m Atlanta ATL 21:35 → BUF 23:42DL 2334 9h 00m 99% 75%
JetBlueDetails → SJU 10:29 → JFK 14:33B6 904 2h 52m New York JFK 17:25 → BUF 19:06B6 1202 8h 37m 97% 68%
JetBlueDetails → SJU 11:14 → MCO 14:33B6 1334 3h 22m Orlando MCO 17:55 → BUF 20:45B6 1586 9h 31m 97% 59%
JetBlueDetails → SJU 15:33 → FLL 18:15B6 1454 1h 38m Fort Lauderdale FLL 19:53 → BUF 23:05B6 866 7h 32m 79% 55%
How these are worked out. Each flight’s odds are our forecast for that day (typical odds until the weather forecast covers it); flights of airlines we don’t forecast yet use their 12-month record and are marked. Makes the connection: the first flight’s 12-month lateness curve, scaled so its chance of arriving 15+ min late matches the day’s forecast, at the layover minus the 45-minute minimum (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled × second flight within 15 minutes, each from the day’s forecast.

About this data: forecast odds from our model for Sat, Oct 10 (newest published update); 12-month records from US DOT on-time data, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. JSON