Alaska Air Group, Inc. is a holding company, which engages in the provision of air transportation services. It operates through the following segments: Mainline, Regional, and Horizon. The Mainline segment includes scheduled air transportation on Alaska's Boeing and Airbus jet aircraft for passengers and cargo throughout the U.S., and in parts of Mexico, Costa Rica and Belize. The Regional segment consists of Horizon's and other third-party carriers' scheduled air transportation for passengers across a shorter distance network within the U.S. and Canada under capacity purchase agreements (CPA). The Horizon segment encompasses the capacity sold to Alaska under a CPA. The company was founded in 1985 and is headquartered in Seattle, WA.