Thursday, October 8 · typical odds for a Thursday (too early for a weather forecast) · issued Sun 12:00 PM ET · connections flying that day

Thu, Oct 8: no forecasts for this route’s flights; their 12-month records are below.

Nonstops that day

All 1 nonstop →


AS 2026 Alaska flown by Horizon no forecast: 12-month record	ONT 16:18	BOI 19:13	21%	8%	0.0%	79%

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 06:00 → SLC 08:48DL 2708	2h 12m Salt Lake City	SLC 11:00 → BOI 12:16DL 2095	5h 16m	98%	89%
United Details →	ONT 05:00 → DEN 08:20UA 2446	3h 16m Denver	DEN 11:36 → BOI 13:35UA 2255	7h 35m	99%	87%
Alaska Details →	ONT 07:11 → PDX 09:35AS 544	55m Portland	PDX 10:30 → BOI 12:49AS 2089 · flown by Horizon	4h 38m	90%	86%
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%	86%
Alaska Details →	ONT 15:13 → SEA 17:52AS 575	2h 07m Seattle	SEA 19:59 → BOI 22:24AS 2034 · flown by Horizon	6h 11m	99%	84%
American Details →	ONT 06:11 → PHX 07:30AA 1194	2h 37m Phoenix	PHX 10:07 → BOI 13:21AA 4080 · flown by Envoy	6h 10m	96%	83%
Alaska Details →	ONT 12:04 → SEA 14:44AS 654	2h 56m Seattle	SEA 17:40 → BOI 20:07AS 2109 · flown by Horizon	7h 03m	100%	81%
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%	81%

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