If you don't mind to fly TATL routes then it's around $1800 r/t.
You may want to contact DL agent and try to book your TPAC routes via PVG with DL and PVG to HKG on MU. Right now, a round-trip ticket from GRR to PVG on DL is around $1100.
Alternative, you may want to purchase a separate ticket from PVG to HKG for $270 on CX.
Last edited by Dalat767; Nov 30, 2013 at 8:53 pm