Hi does anyone know if Delta Priority members get the same benefits when they fly with KLM of AF, im sure i read it somewhere, i.e. top of list for upgrades, economy comfort when available and fast track etc.

I have managed to become a platinum member with numerous trips to USA in recent years and it would be handy when i fly those partner airlines to LOS, thanks for any advice.

If you are "elite", you'll get the same services as their elite, but after their customers are handled first. This is usually the way it works. I just flew with Egypt Air, a partner with United, and was allowed to board early, etc. But no upgrade as the plane was full!

Yes i am ''elite'', thanks for the heads up.