Originally Posted by
stifle
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The only benefit I can think of from Gold Circle when flying another airline requires you to be Elite (top tier), in which case you may use the lounges at DUB and ORK even when not flying EI.
You have to be flying EI at ORK to use your Gold Circle card to use the Airport lounge there.
You have to be flying EI (or perhaps BA now as well?) at DUB to use your Gold Circle card to use the Aer Lingus lounge there.