Going to go ahead and bump this thread, just wanting to plan ahead for a trip coming up in a couple months.

I am flying DFW-IAH-LHR-BUD. I am AA Exec Plat which grants OW Emerald, as well as a couple Priority Pass cards, and an AMEX platinum. My ticket is BA booked in J. I think this means I have access to the HAS Lounge, the Centurion Lounge, and maybe the AF/KLM (PP + Emerald?). What is the best option as of 2025?