How do I Cancel my Spirit Airlines Flight? If you want to cancel your Spirit Airlines flight, You should opt for the Spirit Airlines customer service phone number, or you can cancel your ticket online via the Spirit Airlines booking website. In case, you have purchased your ticket through a travel agent then you can contact them to cancel the ticket. For more details on how do I cancel my Spirit Airlines flight, visit the following URL. https://www.holidayglobes.com/airlines/spirit-airlines.aspx