Five airlines operate between the United States and Europe with only one route each. These airlines—Air Tahiti Nui, Hainan Airlines, HiSky, Iberojet, and Singapore Airlines—stand out in a market with over 500 nonstop routes and 77.75 million passengers last year, based on Cirium Diio data.
Singapore Airlines joined this group recently after ending its longest one-stop flight between Singapore and Houston via Manchester. "Hainan Airlines does not have fifth freedom rights on this leg of its around-the-world service, its entry is contentious," but it qualifies due to its stop in Europe.
HiSky launched its Bucharest-New York JFK route in June 2024. The US Department of Transportation data shows Bucharest had not had flights to New York since Delta Air Lines ended the route in 2009. "It was served by TAROM until 2003," and "the traffic is relatively good (51,000 passengers in 2024)," though yields are further reduced by Bucharest's longer distance compared to other European routes.