Inbound flight with VA is code L Outbound is code Y On V-Flyer it states... â€¢This fare is eligible for utilisation of: ?Upgrades - from Economy to Premium Economy for 10,000 miles each sector or from Economy to Upper Class for 30,000 miles per sector. Note there must be availability in U Class for a Premium Economy Upgrade or G Class for an Upper Class Upgrade. You will still the Economy level of miles and Tier Points if you upgrade to a higher class What does this mean in simple terms? Are these flights eligible for upgrades if there is availability and at what charge? How do you check availability?