Dayton led by as many as 27 points in the second half, and Omaha (2-3) got as close as 15 points.
» DAYTON VS. OMAHA: Seven observations of Flyers | Game preview
Dayton shot 58 percent from the field and 37 percent (10 of 27) from 3-point range. The Flyers forced 15 turnovers and committed 10 turnovers.
Dayton center Jordy Tshimanga dressed in uniform for the first time this season and warmed up with the team but did not see action. He has been sidelined with a knee injury.
Dayton leaves Friday for Maui and plays Georgia in the first round at 2:30 p.m. Monday.
The Flyers played their best half of the season, building a 43-24 halftime lead. They led by as many as 22 points and outscored Omaha 17-0 from the 11:47 to 4:52 mark.
» PHOTOS: Game 1 | Game 2
Mikesell and Watson each scored nine points for Dayton, which shot 55 percent from the field and 38 percent from 3-point range. The Dayton offense thrived after a slow start that saw it score four points in the first five minutes.
» PREGAME FEATURE: Veterans leading the way for Flyers
Toppin scored seven points. Chatman had six, and Landers had five.
Omaha shot 42.3 percent from the field and made 2 of 9 3-pointers. JT Gibson and Ayo Akinwole each scored nine points.