Update 02.02.2014:
SriLankan Airlines will not join OneWorld on 1 March 2014 as it was initially rumored, nor before 31 March 2014, when TAM and US Airways will join. But it won't last long.
SriLankan Airlines, the main operator in Sri Lanka, has chosen to join the airline alliance OneWorld. The membership process will take approximately 1.5 years and will be sponsored by Cathay Pacific. According to the program, SriLankan Airlines will officially join with full rights by the end of the 2013 year.
The airline operator has experienced one of the biggest increases lately. It operates a fleet of 21 aircraft (seven Airbus A320, five A330-200 and six A340-300) and provides services to 34 from destinations in 22 from countries in Europe, Asia and the Middle East. SriLankan Airlines has code-shares with Malaysia Airlines and today they have been announced with Royal Jordanian and S7 Airlines, with the last two operators already being members of OneWorld.
OneWorld officials said SriLankan Airlines operates mostly in the Maldives and southern India. When joining the alliance, the Sri Lankan operator will bring 3 new destinations from India - Kochi, Tiruchirapalli and Thiruvananthapuram and expand the OneWorld network to 850 destinations in 150 countries.