Transatlantic air travel: The six busiest routes connecting Europe and the United States

Another major corridor is Newark Liberty International Airport to London Heathrow. Newark serves as a hub for United Airlines, which operates up to seven daily flights using Boeing 767-300ER aircraft configured with 46 Polaris business seats. While most foreign carriers prefer John F. Kennedy International Airport (JFK), British Airways also maintains two daily flights from Newark using Boeing 777-200ER and 787-10 aircraft that feature first-class cabins.

The Chicago O'Hare to London Heathrow route matches Newark-London in terms of frequency but offers more total seats. This route is served by United Airlines—using three daily Boeing 767-300ERs—and by American Airlines and British Airways through their joint venture partnership, providing six daily flights during peak season.

Los Angeles to London Heathrow also sees significant traffic, with nine daily flights split mainly between American Airlines and British Airways under the oneworld alliance. United offers one daily flight with a Boeing 787-9, while Virgin Atlantic operates three daily Airbus A350-1000 services as part of SkyTeam’s presence.

The New York-JFK to Paris Charles de Gaulle route is dominated by the Delta-Air France joint venture. These two airlines account for nine out of eleven daily summer flights between the cities. Air France typically provides up to six daily services using both Boeing 777s and Airbus A350-900s; Delta contributes three additional flights using Airbus A330-300s and Boeing 767-400ERs. Competing services from American Airlines and JetBlue are smaller in scale.

The busiest transatlantic route remains New York-JFK to London-Heathrow. This corridor features intense competition between SkyTeam (Delta and Virgin Atlantic) and oneworld (American Airlines and British Airways). Oneworld carriers operate up to thirteen daily flights; SkyTeam provides eight more. JetBlue participates with two smaller-capacity Airbus A321LR flights per day—a modest share compared to widebody operators—but has reportedly found success in its transatlantic operations despite broader challenges facing the airline.

Overall, these routes illustrate how major US and European airlines leverage partnerships within global alliances—Star Alliance, SkyTeam, and oneworld—to maximize efficiency and coverage across one of aviation’s most important markets.