Thursday, October 8 · typical odds for a Thursday (too early for a weather forecast) · issued Sun 12:00 PM ET · 3 nonstops

Thu, Oct 8: UA 1252 at 06:00 is the safest bet, 3% chance of being 15+ min late; the others run 7–14%.

Safest bet that day UA 1252 CLE 06:00 → IAD 07:15 · 3% chance 15+ min late · usually 97% on time Riskiest UA 780 CLE 15:02 → IAD 16:20 · 14% chance 15+ min late · usually 84% on time

Every nonstop on Thu, Oct 8

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 1252 United Flight history →	CLE 06:00	IAD 07:15	3%	1%	0.6%	97%
UA 1181 United	CLE 10:37	IAD 12:04	7%	2%	0.6%	no record
UA 780 United Flight history →	CLE 15:02	IAD 16:20	14%	4%	0.6%	84%

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 Thu, Oct 8 (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