Originally Posted by
andreiz
Let’s say Finnair Premium lounge in Helsinki and Cathay Pier/Wing in Hong Kong. I’ll be flying HEL-SIN on Finnair and HKG-SIN later on Cathay.
I changed my crediting from CX to BA and JL 3 years ago.
I successfully entered CX first class lounges at HKG with my CX Diamond cards, crediting miles to JL (boarding pass/PNR).
JL's NRT/HND lounges also accept physical card for entering lounges with crediting other FFPs.