Saturday, October 10 · typical odds for a Saturday (too early for a weather forecast) · issued Sun 12:00 AM ET · 6 nonstops

Sat, Oct 10: WN 18 at 05:08 is the safest bet, 3% chance of being 15+ min late; the others run 6–30%.

Safest bet that day WN 18 LAS 05:08 → HOU 10:09 · 3% chance 15+ min late Riskiest WN 3538 LAS 17:41 → HOU 22:42 · 30% chance 15+ min late

Every nonstop on Sat, Oct 10

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 18 Southwest	LAS 05:08	HOU 10:09	3%	1%	0.6%	no record
WN 4300 Southwest	LAS 07:31	HOU 12:42	6%	2%	0.6%	no record
WN 2305 Southwest	LAS 00:56	HOU 05:52	14%	2%	0.6%	no record
WN 2298 Southwest	LAS 11:46	HOU 16:47	19%	4%	0.6%	no record
WN 3524 Southwest	LAS 15:21	HOU 20:22	23%	7%	0.8%	no record
WN 3538 Southwest	LAS 17:41	HOU 22:42	30%	10%	1.1%	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 Sat, Oct 10 (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