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 Alaska's Boeing or Airbus jet aircraft for passengers and cargo throughout the U.S., and in parts of Canada, Mexico, and Costa Rica. 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 (CPAs). The Horizon segment includes the capacity sold to Alaska under CPA. The company was founded in 1985 and is headquartered in Seattle, WA.