Sunday, October 11 · typical odds for a Sunday (too early for a weather forecast) · issued Mon 12:00 AM ET · 4 nonstops

Sun, Oct 11: DL 1388 at 05:33 is the safest bet, 5% chance of being 15+ min late; the others run 9–19%.

Safest bet that day DL 1388 RDU 05:33 → DTW 07:16 · 5% chance 15+ min late · usually 93% on time Riskiest DL 1407 RDU 18:45 → DTW 20:36 · 19% chance 15+ min late · usually 83% 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 1388 Delta Flight history →	RDU 05:33	DTW 07:16	5%	3%	0.8%	93%
DL 1427 Delta Flight history →	RDU 09:54	DTW 11:36	9%	3%	0.7%	94%
DL 2164 Delta Flight history →	RDU 12:59	DTW 14:44	12%	3%	0.7%	86%
DL 1407 Delta Flight history →	RDU 18:45	DTW 20:36	19%	5%	0.8%	83%

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