TURKISH AIRLINES' successful Dublin to Istanbul service is to go double daily three days per week from next March.Turkish Airlines is adding three extra return flights per week from the beginning of next year's summer season, when it will operate 10 return flights per weeks between Dublin and Istanbul. 'We are delighted to announce this increase in flights out of Dublin,' said Murat Balandi, Managing Director of Turkish Airlines Ireland. ' This will provide more options for our customers and also opens up extra options for connecting flights out of Istanbul and will mean more traffic through Dublin Airport,' Cormac O'Connell, Dublin Airport Authority's Head of Aviation Business Development, welcomed the decision by Turkish to significantly expand its Dublin presence. He said: ' We have been working closely with Turkish Airlines for several years and this extra frequency will offer passengers additional choice and convenience.' The expanded Turkish Airlines service, which will see second evening departure from Dublin on Mondays, Fridays and Saturdays from next March, will offer additional frequency to Istanbul and improve onward connections to destinations such as Sharm El Sheik (Egypt), Dar Es Salaam (Tanzania), Sofia ( Bulgaria), Bucharest ( Romania), Chisinau (Moldova) and Sarajevo (Bosnia and Herzegovina).