Hamburg Airport HAM to Zagreb Franjo Tuđman Airport ZAG flight with Lufthansa

Air Serbia is the national flag carrier of Serbia, with its main hub at Belgrade Nikola Tesla Airport. The airline's origins trace back to Aeroput, established in 1927, making it one of the oldest airlines in Europe. Rebranded as Air Serbia in 2013 after a partnership with Etihad Airways, the airline has since modernized its fleet and expanded its network. Air Serbia operates scheduled, seasonal, and charter flights to over 90 destinations across Europe, the Mediterranean, North America, Asia, and Africa. They offer both passenger and cargo services, and in cooperation with partner airlines, extend their reach to international destinations in Asia, Australia, North America, and Africa. The airline is a member of the International Air Transport Association (IATA).

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.