Associated Press and many others report that Southwest Airlines has agreed to acquire all the shares of AirTran. This will combine the two largest hybrid airlines in North America to create a giant carrier that will board over 140 million passengers this year. This could be a blow to Navitaire and Farelogix. Air Tran is currently Navitaire's largest North American customer and it uses Farelogix for ancillary sales but it is likely that the combined carrier will use Southwest's IT systems. Currently Southwest uses a dedicated passenger services system provided by Sabre. In the last year Sabre has won three major customers from Navitaire as airlines coming from the low-cost tradition seek to add more complex functionality around interline and code-share.