Wednesday, October 7 · typical odds for a Wednesday (too early for a weather forecast) · issued Sat 12:00 PM ET · 6 nonstops

Wed, Oct 7: DL 729 at 06:15 is the safest bet, 11% chance of being 15+ min late; the others run 13–21%.

Safest bet that day DL 729 SAN 06:15 → ATL 13:49 · 11% chance 15+ min late · usually 92% on time Riskiest DL 1179 SAN 08:00 → ATL 15:28 · 21% chance 15+ min late · usually 86% on time

Every nonstop on Wed, Oct 7

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 729 Delta Flight history →	SAN 06:15	ATL 13:49	11%	2%	0.8%	92%
DL 680 Delta Flight history →	SAN 22:29	ATL 05:44	13%	2%	0.8%	94%
DL 540 Delta Flight history →	SAN 14:18	ATL 22:00	15%	3%	0.7%	83%
DL 725 Delta Flight history →	SAN 10:36	ATL 18:11	16%	3%	0.8%	87%
DL 843 Delta	SAN 13:00	ATL 20:09	20%	4%	0.7%	no record
DL 1179 Delta Flight history →	SAN 08:00	ATL 15:28	21%	3%	0.8%	86%

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 Wed, Oct 7 (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