Passengers may also upgrade to a Premium Economy Seat for a fee, which provides additional legroom, priority boarding, and other amenities. Air Canada Seat Selection offers passengers the option to select their seats in advance, either for free or for a fee. Passengers can always select their seat free of charge at check-in. However, if they prefer to select their seat in advance, they can do so for a fee or for free, depending on the type of seat they choose.