Andrei Kirilenko and Ronnie Brewer added 16 points apiece for the Jazz, who improved to 6-1 and lead the Northwest Division. Brewer scored all of his point in the fourth quarter.
Andre Miller scored 25 points, Andre Iguodala had 15 points and 10 rebounds and Elton Brand added 13 for the reeling Sixers, who lost their third in a row and fell to 2-5.
Samuel Dalembert and Thaddeus Young each added 11 rebounds for the 76ers, who shot just 38 percent from the field.
The Jazz scored 13 of the first 15 points in the fourth quarter - nine by Brewer - to take a 76-69 lead. His 3-pointer with 4:11 remaining extended Utah's lead to 83-73 and sealed the win.
Philadelphia never got closer than five the rest of the way.
The Sixers trailed by as many as 13 points in the third quarter. Facing a 57-45 deficit, Philadelphia went on a 16-2 run to take a 61-59 advantage on a layup by Miller, who scored 10 points during that stretch. The Sixers led 67-63 at the end of the third.
Utah jumped out to a 49-37 lead at halftime thanks in large part to Boozer's 15 points and 10 rebounds as well as 11 Philadelphia turnovers.
The Jazz played without All-Star forward Mehmet Okur, who returned to his home country of Turkey on Monday because of an illness in the family. Okur is averaging 15.5 points per game, second on the Jazz.
Notes: Jazz C Kosta Koufos made his first career start. Koufos, a 19-year-old rookie from Ohio State, was called on because Utah was without Okur, Kyrylo Fesenko, who traveled to Canada to resolve a visa issue, and Jarron Collins (right elbow). Former NBA C Dikembe Mutombo watched the game from the first row alongside agent David Falk. Brand had six blocked shots for the Sixers.