Originally Posted by toyotaboy95

They (Indian Airlines and Gulf Air) don't serve this sector. The ones that do serve are: Bangkok Airways, Cathay Pacific, China Airlines, Emirates, Ethiopian Airlines, Kenya Airways, Orient Thai Airlines, Pakistan International Airlines, Royal Jordanian, SriLankan Airlines, Thai AirAsia, Thai Airways International.

Also consider booking a return ticket but not using the HKG-BKK sector (usually return is cheaper than oneway).