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 18–25% likely to arrive 15+ min late.

Safest bet that day UA 3879 AMA 22:03 → IAH 00:08 · 18% chance 15+ min late Riskiest UA 4816 AMA 15:29 → IAH 16:59 · 25% chance 15+ min late · usually 85% on time

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 3879 United	AMA 22:03	IAH 00:08	18%	9%	2.6%	no record
UA 4224 United flown by CommuteAir Flight history →	AMA 09:01	IAH 10:38	19%	6%	1.7%	91%worse than usual
UA 4827 United flown by CommuteAir Flight history →	AMA 12:01	IAH 13:34	22%	7%	1.5%	83%
UA 4816 United flown by CommuteAir Flight history →	AMA 15:29	IAH 16:59	25%	10%	1.6%	85%

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