Sunday, October 11 · typical odds for a Sunday (too early for a weather forecast) · issued Mon 12:00 AM ET · 3 nonstops

Sun, Oct 11 looks like a normal day here: all 3 nonstops are 25–33% likely to arrive 15+ min late.

Safest bet that day DL 329 ATL 11:00 → SNA 12:31 · 25% chance 15+ min late · usually 75% on time Riskiest DL 2012 ATL 17:30 → SNA 19:00 · 33% chance 15+ min late · usually 71% on time

Every nonstop on Sun, Oct 11

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 329 Delta Flight history →	ATL 11:00	SNA 12:31	25%	4%	0.7%	75%
DL 826 Delta Flight history →	ATL 20:59	SNA 22:25	28%	3%	0.7%	79%
DL 2012 Delta Flight history →	ATL 17:30	SNA 19:00	33%	5%	0.7%	71%

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 Sun, Oct 11 (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