Add chopped bacon to a large frying pan and cook over medium-high heat, stirring occasionally, until crispy. Drain well.
While bacon is cooking, heat olive oil in a large pot. Add chopped onion and saute over medium heat 5 minutes.
Add chicken broth to onion; bring to a boil.
Stir in noodles and boil 1-2 minutes less than package instructions.
In a medium mixing bowl, combine half & half and ranch dressing mix. Whisk until smooth and creamy. Stir mixture into soup and whisk until combined.
Add shredded chicken and heat through.
Serve with cooked bacon, cheddar cheese, and minced chives.