Aer Lingus, Ireland's budget air carrier, unveiled nine new routes to the UK and Europe, Bloomberg reported. The carrier will fly to Sofia all Thursdays and Saturdays from October 28.The company will also increase frequencies on seventeen of its most popular European routes. Earlier in the year the company launched its first Bulgarian route taking passengers to and from the Black Sea city of Burgas. Aer Lingus operates nearly 70 destinations across Ireland, the UK, Continental Europe and the United States.