Eastern Air Lines was a major American airline that operated from 1926 until 1991. It was known for its extensive domestic and international routes, connecting cities across the United States and beyond. The airline played a significant role in the development of commercial aviation and was one of the original members of the Airline Deregulation Act in 1978. Throughout its history, Eastern Air Lines was recognized for its innovative services, including the introduction of jet aircraft and in-flight entertainment. However, financial difficulties and increased competition led to its eventual bankruptcy and cessation of operations in 1991, marking the end of an era in American aviation.