The phone number of Spirit Airline Customer Service is 1801-401-2222. This customer service number is an international number and you can contact the number for flight ticket reservation or managing your reservation. For general inquiries such as weight limits of a bag, the size of a bag, charges for extra baggage, cancel and refund policy, you can go to the Spirit Airline website and find all of those answers in the Contact Us page. You can also get in touch with the Spirit customer service via their twitter account. The details and links to their twitter page are provided on this page.