Generally speaking, airlines earn the most money in the third quarter of the year, running between July and September. That is because demand and fares are usually at their highest. In Q3 2026, United Airlines will fly nine aircraft types/variants across the Atlantic: the Boeing 737 MAX 8, 757-200, 767-300ER, 767-400ER, 777-200ER, 777-300ER, 787-8, 787-9, and 787-10. It is unclear when the Airbus A321XLR will be used.