Spirit airlines cancellation policy allows customers to cancel their flights and receive a full refund up to 24 hours before the scheduled departure time. However, after that timeframe, refunds are not guaranteed and may only be offered in certain circumstances, such as death or serious illness of the customer or an immediate family member. Additionally, Spirit Airlines offers the option to purchase Trip Flex during booking, which allows for unlimited changes or cancellations without fees up until 24 hours before departure. If a flight is cancelled by Spirit Airlines due to factors outside of the customer's control, such as weather conditions or mechanical issues, they will be reimbursed for their ticket. Overall, while cancellations can be a hassle for travellers, Spirit Airlines has policies in place to mitigate any financial loss and provide flexibility for their customers.