Today: only flights still to leave (it’s 8:13 pm at Detroit); 8 already left

Sunday, October 4 · our forecast odds · issued Sun 6:00 PM ET · connections flying that day

Today looks rough: weather pushes the legs’ average chance of arriving 15+ min late to 57% (calm day: 40%). Best bet: Southwest via Midway, leaving 20:25, 11% on time.

Nonstops today


DL 1327 Delta Flight history →	DTW 20:37	SFO 22:35	46%	19%	0.1%	59%

Best connections today, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach San Francisco on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival (San Francisco is 3 h behind Detroit). Layovers up to 4 hours. Pick a connection for its 12-month details.


Tight connection: often missed
Southwest Details →	DTW 20:25 → MDW 20:35WN 1782	55m Chicago	MDW 21:30 → SFO 00:10 +1WN 2199	6h 45m	23%	11%

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