Originally Posted by
World Traveller Fuss
Will you earn tier points flying on an AA codeshare operated by Aer Lingus? e.g. AA coded DUB-LHR-XXX
no. You get TPs for a flight coded as OW if it is operated by OW; you get TPs for a flight coded as BA operated by anyone. Exception is QF operated by EK which earns too. Lots of threads on those questions for any detail.