In February 2017 Sundair announced, they will base an Airbus A320 instead of an Airbus A319 at Kassel Airport. In May 2017, Amazon.com announced it would end its cargo flights from Kassel to Doncaster Sheffield Airport which led to the reduction of freight operations at the airport by half as Amazon was the largest customer. Amazon maintains a major logistics and delivery facility in nearby Bad Hersfeld. On 1 July 2017 Sundair started their summer schedule flights. Due to the delayed delivery of their ordered Airbus A320 the flights are operated as wet-lease by Cobrex Trans with a Boeing 737 and other Airlines. On 27 September 2017 Sundair started to operate their first Airbus A320 from Kassel Airport, with the first commercial flight to Palma de Mallorca, the day before Sundair received the AOC.