Creighton, which improved to a 3-2 record, will face Syracuse for the championship of the Beach Bracket Tuesday night.
Five players scored in double figures for the Bluejays and shot 51.6 percent from the floor while posting season highs in scoring (91) free throws (19) and steals (12).
Mogensen scored five points to trigger a 13-0 run allowing Creighton to turn a 7-7 tie into a 20-7 advantage.
"I thought we were solid," said Jim Flanery who coached his 700th game for Creighton."We got contributions from a lot of people. Molly Mogensen got us off to a really good start in the first quarter, we played with a lead and were able to play our bench.