HEAT oven to 350°F.
HEAT large skillet spayed with cooking spray on medium heat. Add onions and garlic; cook and stir 2 min. Add chicken, 1/4 cup salsa, cream cheese, cilantro and cumin; mix well. Cook 5 min. or until heated through, stirring occasionally. Add 1/2 cup shredded cheese; mix well.
SPOON about 1/3 cup chicken mixture down center of each tortilla; roll up. Place, seam-sides down, in 13x9-inch baking dish sprayed with cooking spray; top with remaining salsa and shredded cheese.
BAKE 15 to 20 min. or until heated through.