The airline also agreed to an option for an additional 100 A321neos.
"Today, there is more USA content in Airbus aircraft than from any other country, with more than 40 percent of our aircraft-related procurement coming from the United States".
Delta Air Lines Inc ordered 100 of Airbus SE's A321neo jetliners, a deal with a list value of US$12.7 billion, in a major victory for the European planemaker over Boeing Co.
The Atlanta-based carrier also agreed to an option for 100 addition A321neo jets.
The A321neo ACF (Airbus Cabin Flex configuration) aircraft will be powered by Pratt & Whitney's geared turbofan engines, in a win for the United Technologies unit after a tough few years it has had over the engine's performance and reliability.
"This is the right transaction at the right time for our customers, employees and our shareholders", Delta chief executive Ed Bastian said in a statement. "Delta, Airbus and Pratt & Whitney share the same commitment to safety, efficiency, innovation and continuously improving the customer experience". As of the end of November, Delta was flying a fleet of 196 Airbus aircraft, including 150 A320 Family members, 42 A330 widebodies, and four A350 XWB aircraft. Boeing persuaded the US Commerce Department to slap 300 per cent duties on the new Canadian plane, contending that Bombardier sold the C Series to Delta at well below cost.
Delta said in an investor presentation that the new planes would result in 40 percent fuel savings compared with the jet they are replacing.
Airbus said Delta placed the order for 100 of the new aircrafts, which can carry up to 240 passengers.
Despite shunning USA -based Boeing, the new A321's will be mostly manufactured at an American Airbus plant in Mobile, Alabama.
Boeing's 737-MAX10 was also believed to be under consideration.
Boeing and Delta are embroiled in an ongoing trade dispute over the airline's purchase of the smaller Canadian Bombardier C Series.