Air Canada's cancellation policy depends on when you cancel your flight and the type of fare you purchased. Call at +1-800-651-8918 (US) or +44-203-376-3406 (UK) While fully refundable tickets offer the most flexibility, non-refundable fares may be eligible for a credit, depending on the fare rules. 

Cancellations within 24 hours of purchase

• Full refund: You can receive a full refund to your original payment method, even on non-refundable fares.
• Eligibility: The purchase must be made at least seven days before the scheduled departure date. 

Cancellations after 24 hours of purchase

Refund and credit eligibility depends on the fare type you bought: 

• Fully Refundable Fares: These can be canceled at any time before departure for a full refund to your original payment method.
• Non-Refundable Fares (including Standard, Flex, and Comfort): You may be charged a cancellation fee, and the remaining value is often provided as a travel credit. Call at +1-800-651-8918 (US) or +44-203-376-3406 (UK).
• Basic Economy Fares: After the 24-hour grace period, these tickets are generally non-refundable and cannot be changed or canceled.