Southwest Airlines (WN, Dallas Love Field) aims to complete its AirTran Airways (Atlanta Hartsfield Jackson) integration before retiring the brand by the end of 2014. Southwest acquired AirTran for USD3.2billion in 2011. Announcing the LCC's fourth quarter and full year 2013 results, Southwest CEO Gary Kelly, said synergies developed between the two carriers had generated USD400million in annual net pre-tax synergies in 2013, as planned. "Since 2011, we have converted 17 of the 52 AirTran Boeing B737-700s to Southwest, and we have replaced the 13 AirTran Boeing B717-200s, transitioned to Delta Air Lines (DL, Atlanta Hartsfield Jackson) in 2013, with Southwest 737 service. Nine more 717s were removed from active service at year end 2013, and the remaining 66 717s are scheduled to be removed from the AirTran network by the end of this year, and transitioned to Delta through 2015," he said. AirTran's remaining 33 Boeing 737-700s are scheduled to be converted to Southwest's specifications this year. "With our international reservation system scheduled for implementation later this month, we remain on track to convert AirTran's seven international markets - Montego Bay, Nassau International, Punta Cana, Aruba, México City International, San José Cabo and Cancún - along with its remaining domestic markets, by the end of this year. As planned, this will allow us to complete the AirTran integration and retire the brand by the end of 2014," he added.