Seattle-Tacoma International airport will relocate eight domestic airlines around the airport this May.
The moves will consolidate Alaska Airlines and its regional subsidiary Horizon Air on concourse C and the North Satellite, as well as United Airlines' two operations on concourse A. Currently, Alaska and Horizon are split between C, D and the North Satellite, while United is in B and the North Satellite.
In order to accommodate these moves, American Airlines and JetBlue Airways will move to D from A, Southwest Airlines-subsidiary AirTran Airways, Frontier Airlines and Virgin America to B from A, and Hawaiian Airlines to the South Satellite from A.
The airport operator Port of Seattle will spend up to $130 million on the relocations. This includes $30 million to $35 million on capital costs, $20 million to $25 million on the relocations themselves, and about $70 million on related projects.
The relocations were announced in July 2012.