Friday, October 9 · typical odds for a Friday (too early for a weather forecast) · issued Mon 12:00 PM ET · 3 nonstops

Fri, Oct 9 looks like a normal day here: all 3 nonstops are 9–17% likely to arrive 15+ min late.

Safest bet that day UA 3486 EWR 09:00 → GRR 11:12 · 9% chance 15+ min late · usually 90% on time Riskiest UA 3580 EWR 19:30 → GRR 21:50 · 17% chance 15+ min late · usually 79% on time

Every nonstop on Fri, Oct 9

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.


UA 3486 United flown by Republic Flight history →	EWR 09:00	GRR 11:12	9%	2%	1.1%	90%
UA 3419 United flown by Republic Flight history →	EWR 13:52	GRR 16:03	13%	3%	1.2%	85%
UA 3580 United flown by Republic Flight history →	EWR 19:30	GRR 21:50	17%	6%	1.6%	79%

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 Fri, Oct 9 (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