Heat oven to 350F. Fry the onion and garlic together for about 2 minutes. Add chicken, 1/4 c. salsa, and cream cheese. Cook until heated through and then add 1/2 c. cheese.
Divide mixture into flour tortillas. Roll up and place into a greased 9x13. Top with remaining salsa and cheese. Bake for 15-20 minutes or until cheese is slightly brown on top.