Saturday, October 10 · typical odds for a Saturday (too early for a weather forecast) · issued Sun 8:00 PM ET · 5 nonstops

Sat, Oct 10: DL 1930 at 08:09 is the safest bet, 13% chance of being 15+ min late; the others run 17–28%.

Safest bet that day DL 1930 ATL 08:09 → SJU 11:52 · 13% chance 15+ min late · usually 94% on time Riskiest F9 2082 ATL 12:31 → SJU 16:22 · 28% chance 15+ min late · usually 57% on time

Every nonstop on Sat, Oct 10

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 1930 Delta Flight history →	ATL 08:09	SJU 11:52	13%	2%	0.6%	94%
DL 1882 Delta Flight history →	ATL 09:45	SJU 13:32	17%	3%	0.6%	78%
DL 1946 Delta Flight history →	ATL 13:00	SJU 16:39	19%	4%	0.6%	82%
DL 1861 Delta Flight history →	ATL 18:45	SJU 22:29	20%	7%	0.7%	67%
F9 2082 Frontier Flight history →	ATL 12:31	SJU 16:22	28%	9%	1.0%	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 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