<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by terenz:
Long long before. I was earning NW miles for AS flights in the early/mid '90s. AA's partnership with AS came about after AA started to dismember the QQ operations which competed with AS. Definitely no AA partnership before late '90s.</font>
Actually, AS/AA had probably the original "code share" situation 15+ years ago on services from DFW. I don't know what/who's mileage was earned when flying the shared service.