Originally Posted by
BD1959
No air side transfers, you have to clear security before immigration. Then about another 5 min walk through the shopping plaza to the Lounges.
These times are quite academic so long as there is no queue at Immigration and you don't need to visit the nice people at GST refund. I had the pleasure of about 20 min wait in line at immigration last year ( with my Express Card in the Express line

) and then 45 min in the GST line. This was mid morning. YMMV.