Monday, October 12 · typical odds for a Monday (too early for a weather forecast) · issued Tue 12:00 AM ET · 8 nonstops

Mon, Oct 12: WN 4040 at 07:14 is the safest bet, 4% chance of being 15+ min late; evening flights run 15–16%.

Safest bet that day WN 4040 SNA 07:14 → OAK 08:47 · 4% chance 15+ min late Riskiest WN 3086 SNA 14:19 → OAK 15:52 · 17% 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.


WN 4040 Southwest	SNA 07:14	OAK 08:47	4%	1%	0.6%	no record
WN 3462 Southwest	SNA 08:32	OAK 10:05	5%	1%	0.6%	no record
WN 1151 Southwest	SNA 10:28	OAK 12:02	8%	3%	0.6%	no record
WN 3997 Southwest	SNA 12:17	OAK 13:51	14%	4%	0.6%	no record
WN 4002 Southwest	SNA 20:14	OAK 21:47	15%	4%	0.6%	no record
WN 4001 Southwest	SNA 18:04	OAK 19:38	16%	4%	0.6%	no record
WN 3999 Southwest	SNA 16:21	OAK 17:57	16%	4%	0.6%	no record
WN 3086 Southwest	SNA 14:19	OAK 15:52	17%	5%	0.6%	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