There are several ways to improve your chances of making an upgrade on KLM. Traveling with the Flying Blue loyalty program of the airline is one of the most useful methods, as KLM Upgrade to Business Class is often reserved for frequent flyers with high status. Another way to improve your chances is by booking a more flexible or higher-tier fare, which is given priority when upgrades are available. KLM also offers a bidding system for upgrades, allowing you to offer a price for an available business-class seat.