Today: only flights still to leave (it’s 10:14 pm at Chicago); 13 already left

Sunday, October 4 · our forecast odds · issued Sun 9:00 PM ET · connections flying that day

Today looks rough: weather pushes the average chance of arriving 15+ min late to 39%, against 25% on a calm day. Safest: WN 2032 at 22:25, 39%.

Nonstops today


WN 2032 Southwest	MDW 22:25	LAS 00:20	39%	10%	0.2%	no record

Best connections today, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Las Vegas on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival (Las Vegas is 2 h behind Chicago). Layovers up to 4 hours. Pick a connection for its 12-month details.

No one-ticket connection fits with layovers up to 4 hours that day. Try any airlines.

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