Originally Posted by
phh1998
I am planning to book a Economy Essential multi-city ticket for HKG-SGN & SIN-HKG. Would I be able to use AM to upgrade the SIN-HKG leg [i.e., from Y to PE] only without upgrading the HKG-SGN leg [i.e., sticking with Y]? And if yes, is this something that might be problematic to do online on the CX website, or is it fairly straightforward?
Also, after I upgrade the SIN-HKG leg from Y to PE using Asia Miles, can I then use Manage Booking on the CX website to swap out my CX FFN and replace it with my BA FFN (I have BA Silver/OW Sapphire and CX Green, so I want to swap in my BA FFN once the Asia Miles upgrade is done) for BA mileage accrual and OW Sapphire benefits across the full multi-city HKG-SGN, SIN-HKG itineary?
1) yes, as long as there is availability for that particular flight
fairly easy, just call CX's hotline & they'll sort it out for you in no time (you will not be able to do it yourself online)
2) yes, you can input another FF no. after your AM upgrade has been cleared
have personally tried & done both of what you've mentioned