Friday, October 9 · typical odds for a Friday (too early for a weather forecast) · issued Sun 4:00 PM ET · 3 nonstops

Fri, Oct 9: UA 3700 at 06:30 is the safest bet, 4% chance of being 15+ min late; the others run 9–26%.

Safest bet that day UA 3700 GSP 06:30 → EWR 08:35 · 4% chance 15+ min late · usually 94% on time Riskiest UA 3518 GSP 19:49 → EWR 21:53 · 26% chance 15+ min late · usually 67% 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 3700 United flown by Republic Flight history →	GSP 06:30	EWR 08:35	4%	2%	0.9%	94%
UA 3684 United flown by Republic Flight history →	GSP 11:18	EWR 13:20	9%	3%	0.9%	89%
UA 3518 United flown by Republic Flight history →	GSP 19:49	EWR 21:53	26%	5%	1.2%	67%

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