ユナイテッド・エクスプレス
In 1992, Great Lakes Airlines became a United Express partner, followed by Trans States Airlines the following year. In 1997, as United officially designated Los Angeles International Airport one of its hubs, SkyWest Airlines became a United Express partner as well. Great Lakes left the United Express system in early 2002, although it continued to do codeshare flights until they ceased operations in 2018.