Wednesday, October 7 · typical odds for a Wednesday (too early for a weather forecast) · issued Sat 12:00 PM ET · 4 nonstops

Wed, Oct 7 looks like a normal day here: all 4 nonstops are 11–18% likely to arrive 15+ min late.

Safest bet that day OO 5907 SFO 08:56 → ONT 10:44 · 11% chance 15+ min late Riskiest OO 5932 SFO 13:55 → ONT 15:43 · 18% chance 15+ min late

Every nonstop on Wed, Oct 7

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.


OO 5907 SkyWest	SFO 08:56	ONT 10:44	11%	6%	0.9%	no record
UA 552 United Flight history →	SFO 21:00	ONT 22:37	13%	4%	0.5%	83%
UA 2478 United	SFO 19:07	ONT 20:42	14%	5%	0.6%	no record
OO 5932 SkyWest	SFO 13:55	ONT 15:43	18%	9%	0.8%	no record

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 Wed, Oct 7 (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