Kaleena Mosqueda-Lewis led six Connecticut players in double figures as the top-seeded Huskies routed Idaho 105-37 on Saturday.
Mosqueda-Lewis finished with 22 points, all in the first half. Morgan Tuck had 18, and Moriah Jefferson added 16 for the Huskies (30-4), who advanced to the second round for the 20th straight time in their 25th consecutive tournament appearance.
The Huskies will play eighth-seeded Vanderbilt on Monday. The Commodores beat Saint Joseph's 60-54 earlier Saturday.
Stacey Barr had 14 points for Idaho (17-16), which was playing its second NCAA tournament game ever after upsetting Seattle for the Western Athletic Conference title.
UConn led by as many as 74 in the second half before Idaho made some baskets late.