Tuesday, October 6 · our forecast odds · issued Mon 2:00 AM ET · 4 nonstops

Tomorrow looks like a normal day here: all 4 nonstops are 5–8% likely to arrive 15+ min late.

Safest bet that day DL 1173 SLC 11:09 → ONT 12:12 · 5% chance 15+ min late Riskiest DL 1614 SLC 22:59 → ONT 23:48 · 8% chance 15+ min late · usually 89% on time

Against a calm day 6% average chance a nonstop arrives 15+ min late; 5% 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 1173 Delta	SLC 11:09	ONT 12:12	5%	2%	0.7%	no record
OO 3872 SkyWest	SLC 08:09	ONT 09:06	5%	3%	0.6%	no record
OO 3744 SkyWest	SLC 15:42	ONT 16:46	6%	3%	0.5%	no record
DL 1614 Delta Flight history →	SLC 22:59	ONT 23:48	8%	2%	0.7%	89%

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