(Reuters) - Delta Air Lines Inc <DAL.N> is in talks with Airbus SAS and Boeing Co <BA.N> to buy $1 billion or more new jets, Bloomberg reported, citing people familiar with the matter.

The Atlanta-based airline is looking at current versions of the Airbus A320 and Boeing 737, not the newest versions, likely meaning a deeper discount to retail prices than normal, the news agency quoted one person as saying. (http://link.reuters.com/byw45t)

The talks are for an order of twenty-four to thirty planes and deliveries would start in three to five years, it said.

Lindsay McDuff, a spokeswoman for Delta, told Reuters that the company does not comment on industry rumor and speculation.

The deal could have a book value of at least $1 billion, based on prices tracked by consultant Avitas of Chantilly, Virginia, Bloomberg said.

Delta, the No. 2 airline behind United Continental Holdings <UAL.N>, is looking for a deal in which it could exchange some of its 50-seat regional jets for new planes from Boeing or Airbus, similar to a deal with Bombardier Inc <BBDb.TO> made in December.

The sale of old aircraft is a part of a cost-cutting program at the company, which includes retiring smaller, less efficient planes from its fleet.

(Reporting by Maria Ajit Thomas and Karen Jacobs; Editing by Edwina Gibbs)