Originally Posted by
Darlox
Yeah, and here again... aside from the lack of Polaris lounges outside of UA hubs, there's no penalty to fly a *A partner.
The penalty is for all airports except the origin of your long-haul flight.
FRA-EWR-SFO you can access lounge at EWR and SFO if FRA-EWR is UA but not if it's LH.