Copenhagen Airport CPH to Dusseldorf Airport DUS flight with Eurowings

A regional jet (RJ) is a jet-powered regional airliner typically designed to carry fewer than 100 passengers on short-haul flights. These aircraft are often used by regional airlines, which may operate independently or as subsidiaries contracted by larger carriers, to connect smaller markets to major airline hubs. Key manufacturers of regional jets include Embraer and Bombardier, with Embraer's E-Jet family being particularly popular. Regional jets play a crucial role in providing air service to communities that may not have sufficient demand for larger aircraft, facilitating connections within a country or a specific area of a continent.

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.

There are several entities named "Airmax" in the aviation industry, making it difficult to provide a single, definitive description. One prominent "Airmax" is Airmax Cargo, a cargo airline operating between the United States and Peru since 2003. They offer three weekly flights on Boeing 767 aircraft between Miami and Lima, with connections to other major destinations through interline agreements. Airmax Cargo specializes in general, perishable, and dangerous goods, offering services like charter flights and express delivery. Another is AirMAX International, a logistics service provider based at JFK International Airport, founded in 2003. They offer tailored cargo and courier solutions, including air charter services, express services, and supply chain management, serving global corporations and small businesses. Additionally, "AirMAX Flight Management System" refers to specialized software for the aviation industry, designed to streamline flight booking, scheduling, and customer management for airlines and private aviation companies. There's also Max Air, a Nigerian airline operating domestic and international passenger flights with a fleet including Boeing 737 and 747 aircraft.