Tuesday, October 6 · our forecast odds · issued Mon 12:00 AM ET · 4 nonstops

Tomorrow looks like a normal day here: all 4 nonstops are 2–10% likely to arrive 15+ min late.

Safest bet that day DL 2173 BOI 06:00 → SLC 07:11 · 2% chance 15+ min late · usually 91% on time Riskiest DL 2920 BOI 18:42 → SLC 19:57 · 10% chance 15+ min late · usually 81% on time

Against a calm day 6% average chance a nonstop arrives 15+ min late; 6% for the same flights on a calm-weather day

Every nonstop on Tue, Oct 6

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.


DL 2173 Delta Flight history →	BOI 06:00	SLC 07:11	2%	2%	0.6%	91%
DL 1744 Delta Flight history →	BOI 11:07	SLC 12:22	5%	2%	0.6%	93%
DL 2095 Delta Flight history →	BOI 13:10	SLC 14:41	6%	3%	0.6%	88%
DL 2920 Delta Flight history →	BOI 18:42	SLC 19:57	10%	4%	0.6%	81%

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 Tue, Oct 6 (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