Sunday, October 11 · typical odds for a Sunday (too early for a weather forecast) · issued Mon 12:00 AM ET · 3 nonstops

Sun, Oct 11 looks like a normal day here: all 3 nonstops are 8–18% likely to arrive 15+ min late.

Safest bet that day WN 3998 MCI 08:45 → BOS 12:47 · 8% chance 15+ min late Riskiest DL 314 MCI 22:55 → BOS 02:56 · 18% chance 15+ min late · usually 64% on time

Every nonstop on Sun, Oct 11

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.


WN 3998 Southwest	MCI 08:45	BOS 12:47	8%	3%	1.7%	no record
DL 675 Delta Flight history →	MCI 09:40	BOS 13:44	10%	3%	2.4%	86%
DL 314 Delta Flight history →	MCI 22:55	BOS 02:56	18%	8%	0.9%	64%

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 Sun, Oct 11 (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