Lounge access if flying Lufthansa codeshare?
We will be flying RDU to FRA to VIE in business class on Lufthansa metal but booked via United. Will we be able to use the United lounge in RDU prior to our flight? I know we will be able to use Lufthansa lounge in FRA, but likely will get to airport a little earlier if we get access in Raleigh. Thanks.