Developments since the 2000s
Part of the reason Sun-Air had agreed to become a franchisee was to gain a strategic partner, particularly one that would be able and willing to assist in its growth and the acquisition of larger aircraft.[4] During the late 1990s, Sun-Air initiated a long-term plan to introduce jet-powered airliners into its fleet by 2000. As a step towards this, and to help it handle increasing passenger traffic on its routes between Denmark and Britain, it acquired a pair of second-hand British Aerospace ATPs in late 1997.[7] During 2001, in response to a complaint by Sun-Air, rival airlines Scandinavian Airlines and Maersk Air were fined around €52 million ($44 million) for engaging in anti-competitive behaviour following an investigation by the European Union.[8]
During 2009, it was decided to restructure Sun-Air's charter division, leading to it being rebranded as JoinJet; Niels Sundberg's son, Kristoffer Sundberg, was appointed to head this subsidiary. Focusing largely on business jet operations, JoinJet taken steps to build an individual identity, including the adoption of a unique livery and distinct logo.[9] It maintains a separate employee roster, which includes pilots, flight attendants, flight coordinators, and its own sales team.
According to Sun-Air, the company has traditionally placed an emphasis on providing passengers with a comprehensive service; as such, all scheduled flights have included provisions for meals, drinks, and luggage as default since 2009. The airline has been awarded multiple prizes related to its service quality, including the award of Best European Airline at the Danish Travel Awards.
In April 2014, Sun-Air launched a new daily services between Billund and Zürich in Switzerland, served by its Dornier 328Jets.[10] During the 2010s, Sun-Air became the biggest civil operator of the 328JET.[11] On 25 February 2017, British Airways terminated its flights from Bremen to London and Manchester which were both operated by Sun-Air; the latter had maintained a base for these routes at Bremen Airport.[12]
During 2017, Kristoffer Sundberg took over as CEO of Sun-Air while Niels Sundberg remained chairman of the board. The airline is wholly owned by Niels Sundberg and had 175 employees as of 2019.
In the wake of the COVID-19 pandemic, Sun-Air terminated several routes.[13] In January 2021, the company filed for insolvency for its German operational subsidiary Sun-Air of Germany and laid off most of its Germany based staff.[14]
In March 2025, Sun-Air stopped its last remaining scheduled route between Billund Airport and London-City, ending 34 years of scheduled operations and their affiliation with British Airways. Citing a changed market, the airline uncovered plans to focus on any kind of not scheduled operations.[15]
