The BMI airline is to add an eighth daily flight on its service from Dublin to London's Heathrow Airport from October 29.
The move is part of an expansion of BMI's network from Heathrow, from where it will operate 17 new routes, including Tehran, Damascus, Beirut and Tbilisi.
Last week the British airline played down reports that it was close to signing a deal to take over the Shannon Heathrow route from which Aer Lingus announced its withdrawal last month.