On September 27, 2010, Southwest Airlines announced they would acquire AirTran Airways and parent AirTran Holdings for a total cost of $1.4 billion. The acquisition gave Southwest a significant presence at many of AirTran's hubs such as Atlanta (then the largest U.S. city without Southwest service), Milwaukee, and expanded service in Baltimore and Orlando. With the acquisition, Southwest added international service to several leisure destinations such as Cancún, Montego Bay and Aruba. Southwest integrated AirTran's fleet of Boeing 737-700 series aircraft into Southwest Airlines brand and livery, and the Boeing 717 fleet was then leased out to Delta Air Lines starting mid-2013. The airlines planned to have the acquisition completed and finalized within two years with the two carriers operating as separate airlines in the interim. The deal closed on May 2, 2011, and a single operating certificate for the combined carrier was achieved March 1, 2012. Total integration of all employee groups between the two carriers was completed in 2015.