Thursday, October 8 · typical odds for a Thursday (too early for a weather forecast) · issued Sun 12:00 PM ET · 5 nonstops

Thu, Oct 8: B6 753 at 06:40 is the safest bet, 8% chance of being 15+ min late; the others run 21–25%.

Safest bet that day B6 753 FLL 06:40 → SJU 09:19 · 8% chance 15+ min late · usually 87% on time Riskiest F9 3018 FLL 10:54 → SJU 13:45 · 25% chance 15+ min late · usually 57% on time

Every nonstop on Thu, Oct 8

12-month record →

Ranked by the chance of arriving 15+ minutes late (typical odds: the weather this date has had in past years), with each flight’s on-time record over Aug 2025 – Jul 2026 beside it. Times are local. Pick a flight for its forecast. Click a column to sort.


B6 753 JetBlue Flight history →	FLL 06:40	SJU 09:19	8%	3%	1.0%	87%
B6 1553 JetBlue Flight history →	FLL 10:10	SJU 12:48	21%	8%	1.0%	60%
WN 1931 Southwest	FLL 17:26	SJU 20:09	23%	8%	0.8%	no record
B6 1453 JetBlue Flight history →	FLL 12:05	SJU 14:42	24%	10%	1.0%	71%
F9 3018 Frontier Flight history →	FLL 10:54	SJU 13:45	25%	9%	1.2%	57%

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 Thu, Oct 8 (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