Add all ingredients, except for the cream cheese and fresh cilantro, to a large slow cooker. Cook on low for 7-8 hours or on high for 3-4 hours, until the chicken is cooked and the onions are tender.
Remove chicken breasts, shred, and return to slow cooker. Add the cubed cream cheese, stir, and cook on high (covered) for about 15 minutes until the cream cheese is melted and the chili is creamy.
Taste chili and adjust salt and pepper, if needed.
Serve bowls topped with fresh cilantro. Other topping ideas include: tortilla strips, shredded cheese, diced avocado, or a lime wedge.
