Airline trading cards have become increasingly popular over the past few years. Frontier Airlines released holiday ones, Hawaiian showcased its aircraft, Delta had some fun ones for its centennial, and Alaska handed them out for World Pilots' Day. Now, Spirit Airlines is adding some fun for aviation fans and frequent flyers with the launch of its first-ever trading cards. The inaugural trading card collection is sponsored by Airbus and highlights the evolution of Spirit Airlines’ all-Airbus fleet.