Originally Posted by
lsquare
A quick search shows that AC doesn't fly out of T3. I'm not very familiar with LHR's layout. If I fly AC, what's the best way to get to T3 and back?
You are only able to transfer between Terminals airside if the flight is departing from the specific terminal. But for AC since its in T2 the Queens Terminal the lounge options are great there as well with UA/SQ/AC lounges so I wouldn't be too bummed