フロンティア航空
In July 2009, Republic acquired 89 percent of Mokulele Airlines and financially troubled Midwest Airlines. In October 2009, the company acquired Frontier Airlines which was being reorganized along with Frontier Airlines Holdings' Lynx Aviation in Chapter 11 bankruptcy. On April 13, 2010, Republic announced that Midwest and Frontier would combine into a single airline, keeping the Frontier Airlines name.