South West Coach Lines was founded in 1977 by David and Lenita Adams.

In January 1986, it commenced operating the Bunbury City Transit service (since renamed TransBunbury).

In November 2007 the business was purchased by Veolia Transport[1] and in July 2013 became part of Transdev Australasia.

In December 2009, South West Coach Lines commenced operating three services in Busselton under the TransBusselton brand under contract with the Public Transport Authority.

[4][6] Since late 2014, South West Coach lines has been owned by Australian Transit Group.