Join Date: Nov 2002
Location: LAX, SAN, ORD, MAA & COK
Programs: AA LT EXP 6+ MM, AC, DL (MM) & LT SkyClub, All Airlines 10+MM, Hilton LT Diamond, Bonvoy LT Plat
Posts: 761
You can do CMB-HKG on CX with OneWorld
One of my friends and his wife are currently doing exactly what you want on a RTW OneWorld Business Class trip doing the LHR-MAA on BA and then continuing from CMB to HKG on CX. They are using a non-partner airline Air Lanka for the MAA-CMB hop but on a seperate paid ticket.