Upgrading on Virgin Atlantic from Economy (Classic/Delight) to Premium is most efficiently done through the "Manage My Booking" portal or the Virgin Atlantic app. You generally have three paths: Cash, Virgin Points, or Bidding. If you want a guaranteed upgrade, you can pay the fare difference in cash at any time before check-in. Alternatively, you can use Virgin Points; since 2024, Virgin has moved to a "dynamic" points system, so the cost will fluctuate based on demand. You can check for "Reward Seat" availability in Premium; if a seat is open, you can usually upgrade by paying the points difference plus any additional taxes. The third option is "Your Bid," where you can enter a "blind auction" for an upgrade by offering a price you are willing to pay; you will be notified roughly 2-3 days before the flight if your bid was successful. Finally, you can always ask for a "Last Minute Upgrade" at the airport check-in desk or the gate, which is sometimes offered at a significantly discounted rate if the Premium cabin has unsold inventory just before departure.