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: DL 1854 at 07:35 is the safest bet, 5% chance of being 15+ min late; the others run 9–23%.

Safest bet that day DL 1854 SJU 07:35 → JFK 11:30 · 5% chance 15+ min late · usually 93% on time Riskiest B6 1004 SJU 12:52 → JFK 16:55 · 23% chance 15+ min late · usually 69% 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.


DL 1854 Delta Flight history →	SJU 07:35	JFK 11:30	5%	2%	0.8%	93%
DL 1966 Delta Flight history →	SJU 13:10	JFK 17:19	9%	4%	0.8%	85%
B6 904 JetBlue Flight history →	SJU 10:25	JFK 14:27	16%	7%	0.9%	75%
B6 2904 JetBlue Flight history →	SJU 05:01	JFK 08:54	17%	5%	1.2%	84%
B6 1004 JetBlue Flight history →	SJU 12:52	JFK 16:55	23%	12%	0.8%	69%

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