Sunday, October 11 · typical odds for a Sunday (too early for a weather forecast) · issued Mon 8:00 PM ET · 3 nonstops

Sun, Oct 11 looks like a normal day here: all 3 nonstops are 11–16% likely to arrive 15+ min late.

Safest bet that day DL 5340 LGA 13:31 → ROC 14:46 · 11% chance 15+ min late · usually 81% on time Riskiest 9E 5054 LGA 16:08 → ROC 17:15 · 16% chance 15+ min late

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 5340 Delta flown by Endeavor Flight history →	LGA 13:31	ROC 14:46	11%	4%	1.1%	81%
DL 5417 Delta flown by Endeavor Flight history →	LGA 22:12	ROC 23:28	16%	6%	1.6%	69%
9E 5054 Endeavor	LGA 16:08	ROC 17:15	16%	6%	1.3%	no record

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