Delta Air Lines has deferred the deliveries of 10 Airbus A350-900s and ordered 30 more A321s.
The A350s are deferred for two to three years from their original delivery dates in 2019 and 2020, the Atlanta-based carrier says.
Delta will still take delivery five A350s this year and six in 2018, its fleet plan shows.
Ed Bastian, chief executive of Delta, said in April that the airline saw "excess capacity" in the widebody market in the coming years and was evaluating the impact on Delta.
Delta has ordered 30 more A321s, increasing its firm on-order total for the aircraft to 112. CFM International CFM56 engines will power the jets, Airbus confirms.
The new order is worth $3.5 billion at list prices.
"These agreements better align our widebody and narrowbody order books with our fleet replacement needs," states Gil West, Delta's chief operating officer.
The carrier operates 19 A321s, Flight Fleets Analyzer shows. It first ordered the A321 in 2013.
The fifth paragraph has been updated, correcting the on-order total