American Vs. United Vs. Delta: Which Legacy Carrier Has More Transatlantic Flights?

United Airlines, Delta Air Lines, and American Airlines are the three big US-based airlines offering international flights across the Atlantic Ocean to Europe and to Africa to a lesser extent. JetBlue also offers transatlantic flights with its narrowbody aircraft, although these are far fewer, and Alaska Airlines is poised to start transatlantic operations in April 2026 following the acquisition of Hawaiian Airlines and its 787 Dreamliner aircraft. So, of the big three, which has the most transatlantic flights?