Air Transat cancellation policy typically varies depending on the fare class and the type of ticket purchased. Non-refundable tickets are not eligible for cash refunds but may allow you to make changes for a fee. Refundable or flexible tickets may offer more lenient cancellation and refund options. The specific fees, refund process, and conditions are outlined in Air Transat's fare rules and policies, which can change. Passengers should visit the airline's official website or contact their customer service for the most up-to-date information on Air Transat cancellation policy, especially considering that policies may have evolved since my last update.