Monday, October 12 · typical odds for a Monday (too early for a weather forecast) · issued Tue 12:00 AM ET · 4 nonstops

Mon, Oct 12 looks like a normal day here: all 4 nonstops are 11–16% likely to arrive 15+ min late.

Safest bet that day UA 1108 IAD 08:25 → CHS 10:11 · 11% chance 15+ min late · usually 94% on time Riskiest YX 3535 IAD 17:12 → CHS 19:18 · 16% chance 15+ min late

Every nonstop on Mon, Oct 12

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 1108 United Flight history →	IAD 08:25	CHS 10:11	11%	3%	1.4%	94%
UA 1952 United	IAD 13:14	CHS 15:05	12%	5%	1.1%	no record
YX 3579 Republic	IAD 22:16	CHS 00:22	15%	4%	1.2%	no record
YX 3535 Republic	IAD 17:12	CHS 19:18	16%	4%	1.6%	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 Mon, Oct 12 (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