Originally Posted by
LondonElite
Transferring points is one thing, but be aware that once they are in a program, they are stuck there. Whether that program or one of its partners has availability on the dates you want to travel is another thing. There are no guarantees.
Fortunately, Amex transfers to Aeroplan are usually instantaneous, and if the OP calls Aeroplan, they will hold award seats while the OP completes the points transfer during the phone call. (There might be a fee for making the award booking by phone, however.)