Today: only flights still to leave (it’s 7:40 pm at Salt Lake City); 29 already left

Sunday, October 4 · our forecast odds · issued Sun 8:00 PM ET · connections flying that day

Today looks rough: weather pushes the average chance of arriving 15+ min late to 42%, against 20% on a calm day. Safest: DL 1667 at 21:05, 42%.

Nonstops today


DL 1667 Delta Flight history →	SLC 21:05	DEN 22:40	42%	15%	0.1%	79%worse than usual

Best connections today, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Denver on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival. Layovers up to 4 hours. Pick a connection for its 12-month details.


Tight connection: often missed
Southwest Details →	SLC 21:20 → LAS 21:45WN 3745	55m Las Vegas	LAS 22:40 → DEN 01:35 +1WN 1502	4h 15m	31%	16%

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