Northwest Airlines was a major American airline that operated from 1926 until 2010. It was primarily engaged in providing domestic and international air transportation services. The company was initially owned by businessmen in Minnesota and was later acquired by Delta Air Lines in 2008. Northwest Airlines had its main hub at the Minneapolis-Saint Paul International Airport and operated flights to various destinations worldwide. Its extensive route network included major cities in North America, Europe, Asia, and the Pacific. The airline played a significant role in connecting passengers between different continents and was known for its reliable service and operational efficiency.