A pregame ceremony honored the victims of the Sandy Hook Elementary School shooting, with youth players from Newtown joining the teams on court.
It was the fifth time that Stewart, a freshman, had led the Huskies (10-0) in scoring this season. Kaleena Mosqueda-Lewis had 21 points, Kelly Faris 18, Bria Hartley 15, and Stefanie Dolson 10 for UConn (10-0).
Stewart also had a team-high seven rebounds. Daphne Elliott led Hartford (8-3) with 10 points.
UConn led 51-15 at halftime, shooting 63.3 percent. Hartley had 15 points.
UConn's next game is against top-ranked Stanford on Dec. 29 in California.
It was the first time the teams played on Hartford's home court since Dec. 23, 1990. UConn has won all 13 meetings.