On paper, United Airlines and American Airlines are both major US legacy carriers with serious transatlantic capabilities, but their business-class propositions are built a little differently in 2026. United’s Atlantic strategy is the bigger, broader one, as the airline says it is the largest carrier in the North Atlantic. The airline has service planned to 46 transatlantic cities in 2026, and it spreads that network across a wide mix of aircraft, including the Boeing 737 MAX 8, 757-200, 767-300ER, 767-400ER, 777-200ER, and all three variants of the 787 Dreamliner. A key competitor, American, has a more narrow and focused transatlantic strategy that is primarily premium-led.