Yes, Air Canada allows travellers to make free flight modifications if they complete the necessary paperwork within a certain time frame, such as bookings within 24 hours. Air Canada change flight policy is designed to help passengers who are likely to encounter discrepancies in their travel plans. The following are some of the flight change policies: If you're willing to change your Air Canada reservation, make sure the new flight departs within 12 hours of submitting your request. A traveller may have to pay roughly $100 to alter their flight if it departs 60 days after the request is submitted. If the flight is planned after 61 days from the time the request was submitted, the penalty is reduced to $25. You must also pay the applicable fare difference if you are moving to a flight that is more expensive than the prior one.