Originally Posted by
QRC3288
$160 HKD round-trip to Central if you buy duty-free on board (vs $180 round trip if you buy at Airport Express kiosks or $200 round-trip if you use Octopus). As the poster above says, there are significant discounts for groups (2-4 pax) so you only want to use this method if you're going solo.
It's a shame you need start your Airport Express round trip from the airport. At the airport express check in level in IFC central, the travel agent next to Starbucks sells round trips for $140 only. I dont remember off hand if there is a travel agent at the airport that also does this discount. I always get it there and normally buy these discount vouchers which I think is good either for 12 months or for the calendar year.