Need to  Change flight with Air Canada ? You can easily change your flight, but you will need to pay a change fee, which depends on the type of ticket and the destination you choose.

Air Canada Flight Change Policy

Air Canada does not allow flight changes for those with basic economy tickets after the initial 24-hour window.
For Standard fares, after the 24-hour window has passed, Air Canada charges a change fee of $100 for flights that depart in 60 days or less and $25 for flights that depart in 61 days or more. If you're changing to a more expensive option, you will need to pay the difference in price.
For Flex fares, after the 24-hour window has passed, Air Canada charges a change fee of $50 for flights that depart in 60 days or less and $25 for flights that depart in 61 days or more. If you're changing to a more expensive option, you will need to pay the difference in price.
For Comfort fares, after the 24-hour window has passed, Air Canada charges a change fee of $25 for flights that depart in 60 days or less and $25 for flights that depart in 61 days or more. If you're changing to a more expensive option, you will need to pay the difference in price.
If you purchased a Latitude, premium economy, or business class ticket, you can change your ticket without being charged any additional fee. If you're changing to a more expensive option, you will need to pay the difference in price. If you're changing to a cheaper flight, the difference in fare will be refunded to your original method of payment.
If you need to make a change to your award ticket, you can do so up to 2 hours before the flight departs — but you will be charged a fee depending on the fare class. The fee is $100 per direction for all ticket types. This drops to $75 for those with Aeroplan Diamond status, and those with Altitude Super Elite 100k will not be charged a fee.
Air Canada Same Day Change Policy

Want to fly on an earlier or later flight on the day of travel?

Air Canada travelers can make a confirmed same-day flight change for a flat fee of 125 USD (no fare difference applicable). Air Canada same-day changes can only be requested on the day of travel, beginning at midnight in the time zone of your scheduled departure. Here is everything that you need to know about the Air Canada same day change rules –

Air Canada same-day flight change is not applicable to the Basic Fares.

Standard and Flex fares can be requested for same-day flight change for an Air Canada change fee of 125 USD and 100 USD respectively.
Passengers need to adjust their travel to an earlier or a later flight on the same calendar day as the originally scheduled flight.
As per Air Canada's same-day flight change policy, the passenger's travel must be between the same city pairs (in and out of the same airports).
Air Canada mileage members are not required to pay Air Canada same-day change fee and can change a flight beginning 24 hours prior to the originally scheduled departure.
Air Canada's Premium Economy, Comfort Class, and Business Class fare includes a free same-day flight change. In other words, passengers holding a refundable fare are not required to pay Air Canada same-day change fee.

How to Change Air Canada Flight

The official website of Air Canada airlines is visited in the web browser.
When the homepage prompts, the passenger needs to go to the Book option in the main menu.
Under the Book option, in the dropdown menu, the Manage Bookings facility is selected.
The booking related to flights, hotels, etc. can be managed in this section of the website.
On the next page, the passenger is asked to enter the booking reference number along with the last name.
By using these details, the ticket can be accessed and the required changes in the flight ticket can be made.
The correct details when entered will prompt the itinerary and the passenger can change the flight here.
The flight can be changed by changing the source, destination or date. The policy of the airline should be considered while saving the details or making any changes.
Once the changes in the ticket are made, it can be saved and submitted.
Finally, the confirmation of a new booking is received via email or text message as per the contact details on the ticket.
The e-ticket received here is used during the check-in, either online or at the airport.
The Air Canada flight change fee varies according to the kind of ticket booked.
Terms and Conditions

Cost to change Air Canada Flight

Basic Economy: not permitted
Standard Fares: $150 ($100 for routes between Toronto and JFK, LaGuardia, or Newark airports)
Flex and Comfort Fares: $75 ($0 for routes between Toronto and JFK, LaGuardia, or Newark airports)
Latitude, Premium Economy, and Business Class: $0
Award Tickets: $100 per direction for all ticket types ($75 for those with Aeroplan Diamond status, and those with Altitude Super Elite 100k will not be charged a fee)