Alaska Air Group, Inc. is a holding company of Alaska Airlines Inc. (Alaska) and Horizon Air Industries Inc. (Horizon). The Company operates Alaska Airlines and Horizon Air airlines, which together with its partner regional airlines serve approximately 100 cities through a network in Alaska, the Lower 48, Hawaii, Canada and Mexico. The Company operates in three segments: Alaska Mainline, Alaska Regional and Horizon. Alaska Mainline is the Boeing 737 part of Alaska's business. Alaska Regional is Alaska's shorter distance network. Horizon operates regional aircraft. In 2014, the Company carried approximately 29 million passengers. Alaska operates a fleet of passenger jets (mainline) and contracts with Horizon SkyWest Airlines Inc. (SkyWest) and Peninsula Airways, Inc. (PenAir) for regional capacity under which Alaska receives all passenger revenue from those flights. Horizon operates a fleet of turboprop aircraft and sells all of its capacity to Alaska.