Thursday, October 8 · typical odds for a Thursday (too early for a weather forecast) · issued Sun 12:00 PM ET · 3 nonstops

Thu, Oct 8 looks like a normal day here: all 3 nonstops are 4–7% likely to arrive 15+ min late.

Safest bet that day DL 4138 FAT 06:00 → SLC 08:41 · 4% chance 15+ min late · usually 96% on time Riskiest DL 3768 FAT 12:35 → SLC 15:21 · 7% chance 15+ min late · usually 93% on time

Every nonstop on Thu, Oct 8

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 4138 Delta flown by SkyWest Flight history →	FAT 06:00	SLC 08:41	4%	3%	0.6%	96%
DL 3786 Delta flown by SkyWest Flight history →	FAT 09:48	SLC 12:29	6%	4%	0.7%	97%
DL 3768 Delta flown by SkyWest Flight history →	FAT 12:35	SLC 15:21	7%	4%	0.6%	93%

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 Thu, Oct 8 (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