Monday, October 12 · typical odds for a Monday (too early for a weather forecast) · issued Tue 12:00 AM ET · connections flying that day

Mon, Oct 12: one nonstop, OO 3001 at 18:45, with a 14% chance of arriving 15+ min late.

Nonstops that day

All 1 nonstop →


OO 3001 SkyWest	ONT 18:45	BOI 21:58	14%	6%	0.7%	no record

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Boise on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival (Boise is 1 h ahead of Ontario). Layovers up to 4 hours. Pick a connection for its 12-month details.


Delta Details →	ONT 06:20 → SEA 09:15DL 3816 · flown by SkyWest	3h 15m Seattle	SEA 12:30 → BOI 15:11DL 3959 · flown by SkyWest	7h 51m	100%	85%
United Details →	ONT 05:00 → DEN 08:20UA 2446	3h 39m Denver	DEN 11:59 → BOI 14:03UA 2255	8h 03m	99%	84%
Delta Details →	ONT 06:27 → SLC 09:19DL 2708	1h 46m Salt Lake City	SLC 11:05 → BOI 12:20DL 2095	4h 53m	97%	83%
Delta Details →	ONT 11:59 → SEA 14:51DL 4070 · flown by SkyWest	1h 19m Seattle	SEA 16:10 → BOI 18:46DL 3688 · flown by SkyWest	5h 47m	94%	80%
Alaska Details →	ONT 07:33 → PDX 09:47AS 544	59m Portland	PDX 10:46 → BOI 13:06AS 329	4h 33m	91%	76%
United Details →	ONT 13:18 → DEN 16:38UA 1263	3h 47m Denver	DEN 20:25 → BOI 22:37UA 5923 · flown by SkyWest	8h 19m	95%	70%
American Details →	ONT 16:26 → PHX 17:54AA 2859	2h 39m Phoenix	PHX 20:33 → BOI 23:51AA 4952 · flown by SkyWest	6h 25m	88%	70%
American Details →	ONT 06:11 → PHX 07:30AA 1194	2h 29m Phoenix	PHX 09:59 → BOI 13:17AA 2888	6h 06m	92%	69%
Tight connection: often missed
Alaska Details →	ONT 14:08 → SEA 16:42AS 575	57m Seattle	SEA 17:39 → BOI 20:13AS 2109 · flown by Horizon	5h 05m	72%	54%

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