Warm a large pot over medium heat. Fry the bacon for 5–6 minutes until golden and crispy. Transfer the bacon to a plate, leaving the fat behind.
Add 2 tbsp butter to the bacon fat. Sauté the onion, garlic, and celery for 4–5 minutes until softened.
Incorporate the flour, stirring until it coats the vegetables.
Pour in the chicken broth, reserved clam juices, potatoes, Italian seasoning, and bay leaves. Bring to a boil, then lower to a gentle simmer. Cook for 10–15 minutes until the potatoes are tender.
Add the heavy cream and chopped clams. Season with salt and pepper to taste.