The 1970s brought dramatic changes in the configuration of Eastern Airlines. Internationalization was begun, and Eastern opened routes to new markets such as Madrid, Mexico City, Santo Domingo, Nassau and London. Services from San Juan 's Luis Munoz Marin International Airport were expanded, and Eastern bought the Lockheed L-1011 jet, which would become known in the Caribbean as El Grandote (the huge one).
Boeing 747s were also introduced for a short time during that period, and Eastern became the official airline of Walt Disney World. Eastern's official ride at Disney's Magic Kingdom park was If You Had Wings.