Wednesday, October 7 · typical odds for a Wednesday (too early for a weather forecast) · issued Sat 12:00 PM ET · 4 nonstops

Wed, Oct 7 looks like a normal day here: all 4 nonstops are 2–11% likely to arrive 15+ min late.

Safest bet that day WN 1537 BWI 09:03 → ISP 10:21 · 2% chance 15+ min late Riskiest WN 963 BWI 19:54 → ISP 21:11 · 11% chance 15+ min late

Every nonstop on Wed, Oct 7

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 1537 Southwest	BWI 09:03	ISP 10:21	2%	1%	0.9%	no record
WN 3974 Southwest	BWI 11:00	ISP 12:18	4%	2%	0.8%	no record
WN 4417 Southwest	BWI 15:49	ISP 17:06	8%	4%	1.0%	no record
WN 963 Southwest	BWI 19:54	ISP 21:11	11%	5%	0.8%	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 Wed, Oct 7 (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