Originally Posted by
IAN-UK
It's an opaque system, and some routes are difficult. Seats can be kept back for airport sales and cash upgrades and (importantly) for staff travel, friends & family. If you're looking at Dubai, it's one of the tricky ones.
Thank's for reply. Are airport upgrades with miles just for 1 leg or for the entire journey. Because call center agent suggest me to come early and ask for upgrade at the check-in. And it is a night flight and I am looking forward to the upgrade.