[QUOTE]Originally posted by pitflyer:
[B]I've been reading fewmiles.net unofficial guide to AADvantage and found the note about upgrades interesting -- that you can purchase a regular fare, and then upgrade it with miles and still earn the miles..


to clarify .. you only earn miles based on the portion of the tkt that you purchase .. so .. if you're top tier .. you're not going to earn the bonuses for the first class cabin .. only the coach 'basic' miles ..