Cook spaghetti as directed on package. Drain well. Meanwhile, toss chicken with flour. Set aside. Cook bacon in large skillet on medium heat until crisp. Drain on paper towels. Set aside.
Remove all but 1 tablespoon drippings from skillet. Add chicken; cook and stir 4 minutes or until golden brown. Stir in milk, cream cheese and seasonings until well blended. Reduce heat to low; simmer 5 minutes, stirring occasionally.
Cut bacon into bite-size pieces. Add to skillet. Place spaghetti in serving bowl. Add chicken mixture; toss well. Serve immediately.