Editing Midwest Airlines (section)

====Merger into Frontier Airlines====
Midwest Airlines' final flight operated with a [[Boeing 717]]-200 and staffed with Midwest Airlines flight crews landed in Milwaukee on November 2, 2009.<ref>{{cite news|url=http://www.wisn.com/money/21501388/detail.html|title=End Of Era Arrives: Midwest's Boeing 717 Lands For Good - Project Economy News Story - WISN Milwaukee|date=November 2, 2009|work=WISN|archive-url=https://web.archive.org/web/20120222031332/http://www.wisn.com/money/21501388/detail.html|archive-date=February 22, 2012|url-status=dead}}</ref> Effective November 3, 2009, Midwest Airlines ceased to exist as an operating airline (allowing its [[United States Department of Transportation|DOT]] air carrier operator certificate to lapse). Midwest Connect flights operated by SkyWest Airlines also ended. Midwest Connect flights operated by Republic and Chautauqua Airlines would continue to operate using the YX code through September 2010.

On April 13, 2010, parent company [[Republic Airways Holdings]] announced that its Frontier Airlines and Midwest Airlines brands would merge under the Frontier Airlines name.<ref name="newname">{{cite news|url=http://www.jsonline.com/business/90750954.html|title=New name for Midwest-Frontier airline: Frontier|work=[[Milwaukee Journal Sentinel]]|first=Tom|last=Daykin|date=April 13, 2010|access-date=April 13, 2010}}</ref> Parts of the Midwest brand were incorporated into the Frontier brand as part of the merger, namely the Midwest cookie and the slogan of Midwest Airlines, "The Best Care In The Air."<ref name="newname" />Some Frontier Airlines [[Airbus A319]] aircraft also began operating on former Midwest routes using the YX code alongside Midwest Connect flights. 

On October 1, 2010, the midwestairlines.com website was shut down for future reservations (besides frequent flyer tickets), and shut down completely on October 28, and users redirected to Frontier Airlines' website. In early November 2010, Midwest's YX code was retired and adopted by [[Republic Airways (airline)|Republic Airlines]].

The Republic and Chautauqua feeder operations would then operate as Frontier Airlines. Several of the Embraer 170/190 aircraft retained the Midwest livery into late 2013 until their retirement or reassignment by Republic. The Chautauqua Embraer 135/145 fleet was repainted with the Frontier livery but were retired by January, 2013.