Originally Posted by crazycrab955
It all depends on whether AC considers the transborder flights to be "international." United does not, and does not allow its *G-level members (PE, 1K, UGS) to use the RCC while on a flight from US-Canada.
United changed this rule more than a year ago. Travel to Canada IS considered international for lounge access purposes. Search in the United Mp forum for "RCC/ADMIT UPDATED 03MAY2004" for the absolute latest rules (updated to discuss US Airways).