Originally Posted by
Ilove2fly
However, I have been told by the ORD United Club staff that we were entitled to use Polaris Lounge when I was checking into the UC after a MUC-ORD flight.
If MUC-ORD was on UA then you are allowed access to the Polaris lounge in ORD - even if you're not connecting (although in that case you won't be able to physically access it unless you have a way to get back past TSA). If MUC-ORD was on another *A airline then you will not get access to Polaris in ORD.