Hamburg HAM to Gdańsk GDN flight with Wizz Air

CityJet is an Irish regional airline headquartered in Dublin, Ireland. Founded in 1992, it began operations in 1994, initially flying between Dublin and London City Airport under a franchise agreement with Virgin Atlantic. CityJet transitioned its business model in 2018, ceasing its own-brand scheduled services to focus on wet leasing aircraft to other European airlines. This means CityJet provides aircraft and crew to operate flights on behalf of other carriers. As of 2023, CityJet operates a fleet of Bombardier CRJ900 and CRJ1000 aircraft, primarily for airlines like Scandinavian Airlines (SAS), Lufthansa, and Brussels Airlines. In 2023, CityJet merged with Air Nostrum, forming the Strategic Alliance of Regional Airlines (SARA).

KLM Cityhopper is the regional airline subsidiary of KLM Royal Dutch Airlines, headquartered in Haarlemmermeer, Netherlands, and based at Amsterdam Airport Schiphol. Established in 1991 from the merger of NLM CityHopper and Netherlines, it operates scheduled European feeder services on behalf of KLM, connecting smaller cities and regional airports to KLM's main hub. As an affiliate of SkyTeam, KLM Cityhopper operates a fleet primarily consisting of Embraer E-Jet aircraft, including the Embraer 175, 190, and E195-E2 models. It serves numerous inter-European destinations, playing a vital role in KLM's regional and international network.

Braathens Regional Aviation was a Swedish airline that operated wet-leasing services for its sister airline, Braathens Regional Airlines, from 2016 until it ceased operations in 2020 due to the COVID-19 pandemic. Founded in 1981 as Malmö Aviation, it initially operated domestic routes from Stockholm Bromma Airport. The broader \Braathens\" entity, with a legacy dating back to 1946, has evolved into a partner for flexible wet lease and charter solutions. They offer ACMI (Aircraft, Crew, Maintenance, and Insurance) services, ad hoc flights, and long-term charter operations. Their diverse fleet includes ATR 72 turboprop aircraft, as well as Airbus A319 and A320 models. As of January 2025, Braathens operates flights on behalf of Scandinavian Airlines (SAS) under a long-term agreement."

Buzz is a Polish airline, a subsidiary of Ryanair Holdings, headquartered in Warsaw. It operates scheduled flights on behalf of Ryanair and also offers its own charter flights from bases in Poland, Czechia, and Bulgaria. Originally launched by KLM in 1999 as a low-cost carrier, it was acquired by Ryanair in 2003 and ceased operations in 2004. The Buzz name was revived in 2019 when Ryanair rebranded its Polish charter airline, Ryanair Sun, to Buzz. Buzz operates a fleet primarily consisting of Boeing 737 aircraft.