and has established eight routes since then. On 24 October 2013, Ryanair announced a new seasonal service to Shannon, while Palermo was added as a destination from the summer season of 2015. For the 2015 summer schedule, Wizz Air announced that it would expand its commitment and serve the cities of Tuzla in Bosnia and Herzegovina, the Bulgarian city of Sofia and the Lithuanian capital Vilnius. On 5 June 2014, the airport welcomed its five-millionth passenger. In December 2014, InterSky announced that it would be taking over the domestic flights from Memmingen to Berlin and Hamburg by 1 March 2015, as Germanwings had announced that it would cease the same services just a few days earlier. In earlier years, these routes had already been unsuccessfully served by TUIfly, Air Berlin, and Avanti Air. In May 2015, InterSky announced that it would have a presence at Memmingen Airport by October 2015 consisting of one aircraft, adding a new route to Cologne and increasing frequencies on the already existing services to Berlin and Hamburg. Later, that plan was changed to a triangular route of Friedrichshafen - Memmingen - Cologne/Bonn was to be established instead of basing an aircraft in Memmingen. However, on 6 November 2015, InterSky ceased all operations due to financial difficulties, leaving Memmingen again without any domestic connections. In March 2017, Ryanair announced plans to establish its second Bavarian base (after Nuremberg Airport) in Memmingen from October 2017 consisting of one aircraft and seven additional routes. On 31 March 2019, another Ryanair aircraft was stationed in Memmingen and the workforce was increased to 70 employees. In December 2017, Memmingen Airport received its safety certification by the European Aviation Safety Agency. 2017 has been announced the first business year in which the airport achieved a profit at year end since the start of public services. In August 2018, the airport announced the schedule for its planned expansion which will take place from September 2018 until 2020. While the runway will be widened and its guidance system and lightning upgraded, the luggage facilities will see an expansion. On 6 December 2018, the 10 millionth passenger was welcomed. In early 2019 the planned expansion works began to widen the runway and expand the handling facilities with the airport being closed for several weeks in September of the same year. The widened and refurbished runway has been inaugurated on 1 October 2019. On 20