Air Transat's refund policy for ticket cancellations can vary between refundable and non-refundable tickets. Refundable tickets are pricier but offer flexibility for full or partial refunds, subject to terms and conditions. Non-refundable tickets are cheaper but often provide credits or vouchers for future travel, with potential fees for changes. Air Transat's specific policy depends on factors like ticket type, fare class, and destination. To get accurate details, review the terms, visit the airline's website, or contact customer service directly before purchasing.