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: one nonstop, WN 3321 at 13:26, with a 11% chance of arriving 15+ min late.

Nonstops that day

All 1 nonstop →


WN 3321 Southwest	SJC 13:26	BOI 16:17	11%	3%	0.6%	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 San Jose). Layovers up to 4 hours. Pick a connection for its 12-month details.


Alaska Details →	SJC 10:19 → SEA 12:30AS 1311	3h 15m Seattle	SEA 15:45 → BOI 18:11AS 2061 · flown by Horizon	6h 52m	100%	90%
Delta Details →	SJC 06:00 → SLC 08:55DL 1314	2h 05m Salt Lake City	SLC 11:00 → BOI 12:16DL 2095	5h 16m	98%	89%
American Details →	SJC 06:00 → PHX 08:03AA 1358	2h 04m Phoenix	PHX 10:07 → BOI 13:21AA 4080 · flown by Envoy	6h 21m	97%	85%
Delta Details →	SJC 07:20 → SEA 09:42DL 4041 · flown by SkyWest	2h 48m Seattle	SEA 12:30 → BOI 15:11DL 3959 · flown by SkyWest	6h 51m	98%	84%
Delta Details →	SJC 11:35 → SEA 13:55DL 3736 · flown by SkyWest	2h 15m Seattle	SEA 16:10 → BOI 18:46DL 3688 · flown by SkyWest	6h 11m	96%	83%
Alaska Details →	SJC 09:46 → PDX 11:31AS 2256 · flown by Horizon	3h 27m Portland	PDX 14:58 → BOI 17:16AS 342	6h 30m	98%	82%
Delta Details →	SJC 09:45 → SLC 12:41DL 4026 · flown by SkyWest	3h 56m Salt Lake City	SLC 16:37 → BOI 17:51DL 2920	7h 06m	98%	81%
Alaska Details →	SJC 06:08 → SEA 08:13AS 762	1h 46m Seattle	SEA 09:59 → BOI 12:26AS 2230 · flown by Horizon	5h 18m	97%	78%

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