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: WN 1253 at 05:15 is the safest bet, 3% chance of being 15+ min late; the others run 13–33%.

Safest bet that day WN 1253 CMH 05:15 → LAS 06:31 · 3% chance 15+ min late Riskiest WN 2721 CMH 19:00 → LAS 20:24 · 33% chance 15+ min late · usually 87% 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 1253 Southwest	CMH 05:15	LAS 06:31	3%	1%	0.5%	no record
WN 2066 Southwest	CMH 11:20	LAS 12:34	13%	3%	0.5%	no record
WN 2721 Southwest Flight history →	CMH 19:00	LAS 20:24	33%	7%	0.5%	87%worse than usual

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