Sunday, October 11 · typical odds for a Sunday (too early for a weather forecast) · issued Mon 12:00 AM ET · 6 nonstops

Sun, Oct 11: DL 5601 at 08:45 is the safest bet, 7% chance of being 15+ min late; evening flights run 17–25%.

Safest bet that day DL 5601 BOS 08:45 → CVG 11:12 · 7% chance 15+ min late · usually 88% on time Riskiest AA 3408 BOS 18:20 → CVG 21:00 · 25% 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 5601 Delta flown by Republic Flight history →	BOS 08:45	CVG 11:12	7%	3%	0.7%	88%
DL 5598 Delta flown by Republic Flight history →	BOS 11:36	CVG 14:12	8%	3%	0.7%	86%
AA 4760 American flown by Republic Flight history →	BOS 11:55	CVG 14:30	9%	3%	0.7%	88%
DL 5789 Delta flown by Republic Flight history →	BOS 14:12	CVG 16:45	10%	4%	0.6%	83%
DL 5801 Delta flown by Republic Flight history →	BOS 20:45	CVG 23:16	17%	6%	0.8%	69%
AA 3408 American flown by Envoy Flight history →	BOS 18:20	CVG 21:00	25%	7%	0.8%	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