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: UA 3718 at 06:05 is the safest bet, 6% chance of being 15+ min late; the others run 13–19%.

Safest bet that day UA 3718 GRR 06:05 → EWR 08:00 · 6% chance 15+ min late · usually 88% on time Riskiest UA 3501 GRR 16:44 → EWR 18:46 · 19% chance 15+ min late · usually 82% 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 3718 United flown by Republic Flight history →	GRR 06:05	EWR 08:00	6%	3%	1.5%	88%
UA 3557 United flown by Republic Flight history →	GRR 12:05	EWR 14:00	13%	5%	1.5%	85%
UA 3501 United flown by Republic Flight history →	GRR 16:44	EWR 18:46	19%	6%	1.7%	82%

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