The first Boeing 767 variant (the non-ER 200) began carrying passengers in 1982. As ch-aviation shows, almost 800 aircraft remain in service with multiple operators, most transporting freight. Only around 200 continue to carry passengers for obvious technological and efficiency reasons. Delta Air Lines and United Airlines deploy the 767-300ER and 767-400ER, while Japan Airlines and All Nippon remain major users of the 300ER because of substantial domestic and regional operations.