Alaska Airlines is an American airline that is based in Seattle, Washington. It is the fifth largest airline in the United States in terms of passenger traffic and fleet size. Alaska Airlines operates a large network of domestic routes within the United States, as well as international flights to Canada, Mexico, Costa Rica, and others. The airline has a strong reputation for its customer service and has consistently ranked highly in customer satisfaction surveys. Alaska Airlines is known for its unique partnerships and codeshare agreements with other airlines, such as American Airlines, British Airways, and Emirates, which allows it to offer a wider range of destinations to its passengers.