Alaska Air Group, Inc. is engaged in operating airlines. The Company operates through its subsidiaries Alaska Airlines, Hawaiian Holdings, Inc., Horizon Air and McGee Air Services. Its segments include Mainline, Regional and Horizon. The Mainline segment includes scheduled air transportation on Alaska's Boeing jet aircraft for passengers and cargo throughout the United States, and in parts of Mexico, Costa Rica, Belize, the Bahamas, and Guatemala. The Regional segment includes Horizon's and other third-party carriers scheduled air transportation for passengers across a shorter distance network within the United States, Canada, and Mexico under capacity purchase agreements (CPA). Horizon segment includes the capacity sold to Alaska under a CPA. It serves more than 140 destinations throughout North America, Central America, Asia and across the Pacific. Its guests have more choices than ever to purchase, earn or redeem on alaskaair.com across 30 airlines and 1,000 worldwide destinations.