Monday, October 12 · typical odds for a Monday (too early for a weather forecast) · issued Tue 12:00 AM ET · 5 nonstops

Mon, Oct 12 looks like a normal day here: all 5 nonstops are 5–12% likely to arrive 15+ min late.

Safest bet that day DL 3607 BOI 08:25 → SLC 09:44 · 5% chance 15+ min late · usually 97% on time Riskiest DL 2095 BOI 12:59 → SLC 14:17 · 12% chance 15+ min late · usually 88% on time

Every nonstop on Mon, Oct 12

12-month record →

Ranked by the chance of arriving 15+ minutes late (typical odds: the weather this date has had in past years), 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 3607 Delta flown by SkyWest Flight history →	BOI 08:25	SLC 09:44	5%	2%	0.5%	97%
DL 2173 Delta Flight history →	BOI 06:00	SLC 07:11	5%	2%	0.7%	91%
OO 4018 SkyWest	BOI 18:44	SLC 20:13	8%	3%	0.5%	no record
DL 1744 Delta Flight history →	BOI 10:47	SLC 12:11	8%	3%	0.7%	93%
DL 2095 Delta Flight history →	BOI 12:59	SLC 14:17	12%	4%	0.7%	88%

How these are worked out. Each flight’s odds are our forecast for that day (typical odds until the weather forecast covers it); 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 Mon, Oct 12 (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