The most common vegetables included in classic chicken noodle soup in the US are a mixture of onion, celery, and carrots (or mirepoix) . However, there are many other vegetables that can be added to chicken noodle soup to make it more flavorful and nutritious. Some examples of vegetables that can be added to chicken noodle soup include:

• Celery
• Carrots
• Onion
• Garlic
• Green beans
• Corn kernels
• Spinach
• Zucchini
• Cabbage
• Pumpkin
• Sweet potato or potatoes
• Peas
• Broccoli
• Ginger

Its important to note that the mix of vegetables used in chicken noodle soup can vary by country and cuisine. Additionally, when cooking the vegetables, its recommended to cook them low and slow to sweeten them and create a brothy flavor. Finally, fresh or dried herbs such as thyme, basil, oregano, or rosemary can be added to the soup to enhance its flavor.