We understand that plans will be revised shortly, so Aeroplan flight rewards will be revised or refunded up to 2 hours prior to departure. You will be able to amend your Air Canada booking through a Ticket Center, or by phone. However, you will be able to revise the date up to two hours before the regular departure of your flight. Air Canada Airlines change flight policy has been introduced to let passengers know if area unit encounters any discrepancies in their itinerary. Confirm that the modified flight takes off within twelve hours of submitting the request if you are willing to make changes to your reservation on Air Canada. If you are changing to a preferred flight at any time compared to the previous flight, you will have to pay the applicable fare difference.