The two-time defending champion Jacks, winning for the 10th time in 11 games, advance to the title game as the third seed with an 18-13 record. They will face Oakland (20-11) in Tuesday's title game, which will be televised on ESPNU at 3 p.m.
IPFW scored the first basket of the game, by Stephanie Rosado, before the Jacks opened a 12-5 lead on a three-point basket by Kristin Rotert, who made four three-pointers in the first eight minutes of the game.
The Jacks led the rest of the game, building its largest margin at 66-55 on a layup by Jennifer Schuttloffel with 5:48 to go. IPFW chipped away and came within one at 66-65. Rotert scored a layup and IPFW countered with a pair of free throws from Sydney Weinert, making it 68-67.
With 11 seconds remaining, senior point guard Macie Michelson hit a pair of free throws, putting the Jacks back up by three, and IPFW's last shot, by Jordan Zuppe, was no good as the clock expired.
Rotert hit 6-of-8 three-point shots and led SDSU with 24 points to tie a season high, while Michelson, 3-of-5 beyond the arc, also matched a season high with 15 points.
SDSU out-shot IPFW 55 (27-of-49) to 51 (24-of-47) percent and had a 28-19 rebound advantage, but the Jacks were minus five (16-11) in turnovers. Jennie Sunnarborg, Jen Schuttloffel and Leah Dietel had four rebounds each to lead the Jacks while Weinert led IPFW with seven.
Rosado led IPFW with 16 points and Anne Boese added 12.
IPFW, which split with SDSU during the regular season when each team won on the road, finished 20-10 as the number-two seed.
NOTES: SDSU leads the all-time series 14-1 ... all three games this season between the two teams were decided by three points ... the Jackrabbits are 8-0 in Summit League tournament games ... Rotert moved into ninth place on the SDSU career scoring charts with 1,460 points, passing Sherri Brende (1,444 points from 1998-2001) ... Rotert matched a career high with her six three-pointers, upping her career total to 246 - four away from tying Brenda Davis (2001-04) for the Jackrabbit career lead ... Jill Young extended her streak of consecutive games with a three-pointer to 22 with a second-half triple and moved into a tie for Davis for fourth on the single-season three-point charts with 75... SDSU is 17-2 this season when leading at the half ... the Jackrabbits held a 16-15 advantage in bench points, led by forwards Leah Dietel and Jennifer Schuttloffel each with six ... the Jackrabbits and Oakland split the regular season series, with each team winning on the other's home floor ... attendance was 3,672