The Crimson (6-1, 3-1 Ivy League) held a 13-0 lead in the second quarter as Conner Hempel ran for a nine-yard score and Flesher kicked two field goals.
Ricky Zorn threw a 32-yard strike to Andrew Berg on a trick play and Harvard converted the 2-point conversion. Dartmouth knotted it up with a seven-yard score by Kyle Bramble late in the third quarter.
Harvard drove 56 yards on 13 plays before setting up Flesher's game-winner with 48 seconds remaining.
South Carolina AD Ray Tanner is not "100 percent sure" Saturday's game vs. No. 7 LSU will be played at Williams-Brice Stadium because of devastating floods that hit the state.
UCLA junior linebacker Myles Jack has withdrawn from school and will enter the NFL draft, making the decision just weeks after suffering a season-ending knee injury.
A judge has lifted a temporary restraining order filed against Rutgers wide receiver Leonte Carroo after a woman he was accused of attacking said she didn't think it was necessary.
Auburn senior receiver D'haquille Williams has been dismissed from the team.
Alabama coach Nick Saban took exception with the media's outlook on his team prior to Saturday's win at Georgia, lashing out at those who "buried" the Crimson Tide.
DraftKings and FanDuel continued to defend their integrity after the disclosure that a DraftKings employee won $350,000 with information used in a way that some have likened to insider trading.