How to upgrade on air France There are a few ways to upgrade on Air France. First, you can manage your booking online or look for upgrade offers while making a reservation. As an alternative, you can raise your ticket class using Flying Blue Miles. If you belong to Flying Blue Elite, you can be qualified for free upgrades. Bidding for an upgrade through Air France's Upgrade Challenge programme is an additional choice. Last but not least, you might ask about last-minute upgrades at the airport, pending availability. The availability of upgrades is constrained, and fees or restrictions could apply based on the fare type and location.