SJC > Boise, Idaho: $171 round-trip- Jul-SepHave friends or family in Boise? Grab this cheap flight and visit them, or check out the reverse search link…...Details to this trip are for members only.Try it for 30 days for free. (We'll even send you a reminder before your first billing.) Already a member? Log in here (and be sure to check the "remember me" box.)Login problems? Click here.