BEIJING: Delta Air Lines has resumed nonstop flight services on its Shanghai-Seattle and Shanghai-Detroit routes starting Dec. 2, according to the airline. These flights will no longer need to stop in Seoul-Incheon, providing more convenience and saving time for customers, the airline said. The airline will use its A330-900neo widebody aircraft for the Shanghai-Seattle route and its A350-900 aircraft for the Shanghai-Detroit route. Delta currently offers two weekly round-trip flights on each route, according to the airline. In late June, Delta became the first American airline to resume passenger flight services between the United States and China, via Seoul. –Agencies