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 2025 Alaska flown by Horizon no forecast: 12-month record	BOI 14:31	ONT 15:38	18%	6%	1.9%	82%

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	BOI 08:25 → SLC 09:44DL 3607 · flown by SkyWest	1h 33m Salt Lake City	SLC 11:17 → ONT 12:12DL 1173	4h 47m	98%	91%
American Details →	BOI 08:07 → PHX 09:34AA 6439 · flown by SkyWest	1h 22m Phoenix	PHX 10:56 → ONT 12:29AA 2661	5h 22m	100%	86%
United Details →	BOI 06:30 → DEN 08:29UA 1782	2h 56m Denver	DEN 11:25 → ONT 12:47UA 430	7h 17m	99%	85%
Delta Details →	BOI 10:35 → SEA 11:26DL 3750 · flown by SkyWest	3h 04m Seattle	SEA 14:30 → ONT 17:21DL 4031 · flown by SkyWest	7h 46m	96%	82%
American Details →	BOI 06:21 → DFW 10:34AA 1107	1h 41m Dallas-Fort Worth	DFW 12:15 → ONT 13:42AA 2635	8h 21m	97%	81%
Alaska Details →	BOI 13:29 → PDX 13:47AS 2209 · flown by Horizon	1h 01m Portland	PDX 14:48 → ONT 17:10AS 1704	4h 41m	94%	77%
American Details →	BOI 13:53 → PHX 15:10AA 4080 · flown by Envoy	1h 46m Phoenix	PHX 16:56 → ONT 18:26AA 1666	5h 33m	97%	76%
United Details →	BOI 06:30 → SFO 07:30UA 4678 · flown by SkyWest	3h 10m San Francisco	SFO 10:40 → ONT 12:12UA 2661	6h 42m	99%	75%
Tight connection: often missed
Alaska Details →	BOI 10:00 → SEA 10:34AS 2166 · flown by Horizon	54m Seattle	SEA 11:28 → ONT 14:01AS 571	5h 01m	27%	18%

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