Up to 24 hours after purchase, you can cancel the tickets, and Air Canada will reimburse you fully without any penalty. There are a few facts regarding the <a href="https://www.airtripsadvisor.com/air-canada-cancellation-policy/">Air Canada Cancellation Policy</a> before cancelling your reservation. If your ticket is reimbursable, you only receive the cancellation refund and the airline will not reimburse you if your ticket is not reimbursable. Air Canada gives you the ability to cancel online flights without any penalties or cancellation fees if you cancel your travel within 24 hours of booking. On request the ticket fee for the reservation will be reimbursed.