Price competed 16-of-21 attempts. Backup Cyler Miles went 5-of-7 for 97 passing yards and a touchdown, and also ran for 89 yards as the Huskies (3-0) posted their largest margin of victory since 1982.
Washington, which next week will begin Pac-12 Conference play, began the season with three straight wins for the first time since 2001.
Justin Arias made good on 18-of-39 pass attempts for 140 yards and two interceptions for Idaho State (2-1).
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