Hi all,
I am wondering which of the big U.S. global carriers (AA, DL, UA) offer the best third party lounge access policy for members of 'elite' status. I fly a lot domestically but will be changing my scope to international and lounges are important to me. The problem is that I will be spread all over the globe and none of the big 3 have their lounges, or partner lounges, in every major airport around the world. I would likely reach gold or higher with any of the carriers and my travel will be in economy cabin a majority of the time. With that said, I think that would still qualify for access to 3rd party lounges but wanted to ask the community to see what others have found through their travels.

To summarize the question, do each of the big three allow free access for gold and higher into 3rd party lounges when traveling in economy cabin? I can't seem to find the answer on their websites.

Thanks