in 1974 to serve the cement factory there. The railway is modernising and extending that line to facilitate faster trains and improved efficiency. Electrification of the network's busiest sections was proposed in 2010 to improve energy efficiency and sustainability, but no work was done. The railway is extending the coastal line from Matara to Kataragama via Hambantota. The Sri Lankan rail network passes scenic landscapes—particularly the Colombo-Badulla main line, which hugs the country's steep highlands. The railways connect the cities of Kandy, Galle, Matara, Jaffna, Kankesanturai, Mannar, Anuradhapura, Gampaha, Negombo, Kurunegala, Avissawella, Kalutara, Polonnaruwa, Batticaloa, Trincomalee, Badulla, Gampola, Nawalapitiya, Matale, Vavuniya, Puttalam and Chilaw with Colombo. The narrow-gauge Kelani Valley Line, from Colombo to Avissawella, was converted to broad gauge. The other narrow-gauge lines, from Nanu Oya to Nuwara Eliya, Avissawella to Yatiyantota and Avissawella to Ratnapura and Opanayaka, were dismantled due to financial losses. In 2007, the Sri Lankan government announced plans for Matara-Kataragama (113 km), Padukka-Hambantota-Ratnapura (210 km), Kurunegala-Dambulla-Habarana (80 km) and Panadura-Horana (18 km) lines by 2014. Air SriLankan Airlines SriLankan Airlines is Sri Lanka's national airline. Founded in 1979 as Air Lanka, the airline changed its name when it received partial foreign ownership in 1998. It operates to Asia and Europe from its base at Bandaranaike International Airport in Colombo; the airline's main office is in the Airline Centre at the airport. The airline was scheduled to join the Oneworld alliance in 2013. SriLankan Airlines flies to 62 destinations in 34 countries. Airports As of 27 March 2022 the oldest airport and the first international airport which is Ratmalana International Airport at Ratmalana resumed international travel and declared open for the public after 55 years. The Colombo International Airport which is in Katunayake, north of Colombo is the second international airport which was declared open for the public after Ratmalana International Airport ceased international travel in 1967 and was the only international airport in operation for 46 years. The airport was renamed in 1995. Mattala Rajapaksa International Airport is in Mattala, north of Hambantota was the third international airport declared open for the public in March 2013. Jaffna International Airport became Sri Lanka's fourth international airport on 17 October 2019 when it was declared open for the public. Domestic flights Domestic operators are Cinnamon Air, FitsAir, Helitours, Senok, and Simplifly. Sri Lanka has 19 airports. Water Sri Lanka has of inland waterways (primarily on rivers in