- CityJet airline is an Irish regional airline based in Dublin. It operates scheduled flights and wet lease services on behalf of other airlines. CityJet was founded in 1992 and started operations in 1993. The airline operates a fleet of Bombardier CRJ900 and Sukhoi Superjet 100 aircraft. CityJet serves various destinations in Europe, including Dublin, London, Paris, Amsterdam, and Stockholm. The airline is known for its high-quality service and customer satisfaction.