Today looks rough: weather pushes the average chance of arriving 15+ min late to 46%, against 34% on a calm day. Safest: WN 2376 at 19:46, 42%.

Safest bet today WN 2376 BWI 19:46 → MCI 21:38 · 42% chance 15+ min late Riskiest WN 4308 BWI 16:05 → MCI 17:45 · 48% chance 15+ min late

Weather 46% average chance a nonstop arrives 15+ min late; 34% for the same flights on a calm-weather day

Every nonstop today

12-month record →

Ranked by the chance of arriving 15+ minutes late, 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. 3 flights that already left today are not shown.


WN 2376 Southwest	BWI 19:46	MCI 21:38	42%	12%	0.2%	no record
WN 983 Southwest Flight history →	BWI 22:10	MCI 23:55	47%	9%	0.2%	55%
WN 4308 Southwest	BWI 16:05	MCI 17:45	48%	11%	0.2%	no record

How these are worked out. Each flight’s odds are our forecast for that day; 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 4 (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