Monday, October 12 · typical odds for a Monday (too early for a weather forecast) · issued Tue 12:00 AM ET · 3 nonstops

Mon, Oct 12 looks like a normal day here: all 3 nonstops are 13–20% likely to arrive 15+ min late.

Safest bet that day DL 3123 SLC 09:50 → SAT 13:36 · 13% chance 15+ min late · usually 83% on time Riskiest DL 2797 SLC 20:40 → SAT 00:26 · 20% chance 15+ min late · usually 82% 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 3123 Delta Flight history →	SLC 09:50	SAT 13:36	13%	4%	0.7%	83%
DL 2199 Delta	SLC 13:30	SAT 17:18	17%	4%	0.7%	no record
DL 2797 Delta Flight history →	SLC 20:40	SAT 00:26	20%	5%	0.6%	82%

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