American Express Canada is a very popular choice for credit cards due to its excellent card member services and rewards programs. The AIR MILES rewards program is one of the best choices for consumer rewards programs, and American Express also features excellent credit and charge cards for business owners. Amex Canada is constantly working to improve its consumer and business credit card offerings. American Express Canada is headquartered in Markham, Ontario, and is a subsidiary of American Express Travel Related Services Company, Inc. based out of New York.