AS has at least four ORD-SEA departures in the summer, and probably twice that many SEA-BOI trips, so perhaps OP could consider trading the first night’s hotel stay in BOI for a hotel near ORD and taking a morning flight with a less stressful connection (and lots of backup flights)
AS also flies ORD-PDX and PDX-BOI
and welcome to FT and the Alaska Airlines board!