Originally Posted by
flyingmania
Just for a DP YWG MLL Domestic did allow entry with a UA First Ticket.
Passengers departing from YWG generally can't access this area but if you have a connecting flight (AC or not) or you request a gate pass they still let you in (they don't ask how you got there).
Granted if already in domestic Plaza Lounge is usually better option.
How does one request and receive a gate pass?