Lufthansa, one of the largest airline groups in Europe, has launched its nonfungible token (NFT) loyalty program on the Polygon Network. The program will allow passengers to turn their trips into NFTs that can unlock rewards, such as miles and business lounge vouchers.

On Aug. 31, Lufthansa announced the Uptrip mobile application, a project by Lufthansa Innovation Hub, the airline group’s digital innovation unit, and Miles & More, the airline’s frequent flyer program.