Now that US Airways Dividend Miles is being combined into American AAdvantage, the American website login process requires you to enter your frequent flyer number and password.. and last name. You can log into the American or US Airways sites with either your Dividend Miles or AAdvantage account number. If you were a Dividend Miles member and not an AAdvantage number you may not even know your new American Airlines frequent flyer number yet. Here’s why they need to know your last name. US Airways frequent flyer numbers from before the airline’s merger with America West are 7 alphanumeric characters. (When the airline moved to a new platform post-merger they went with longer numeric accounts, and have since automatically added preceding zeroes to the earlier accounts for uniformity.) American’s frequent flyer account numbers are 7 … Continue reading The Strange Reason American Now Requires You to Enter Your Last Name at Login