But unlike the government subsidised flights between City of Derry Airport and London Heathrow, which are exempt from APD, the Economy Minister said the new Derry to Dublin service will face the added tax. Dublin Airport. Irish Minister for Transport Darragh O’Brien told the Dáil in May that the flights will take off from October this year. The Irish government previously funded a PSO air route between City of Derry Airport and Dublin Airport for a decade from 2001 until it was discontinued in 2011. Flights from City of Derry Airport to London have been publicly subsidised by Stormont and London since 2017.