WASHINGTON (Reuters) - The U.S. Transportation Department said on Wednesday it had granted final approval to an alliance agreement submitted by Delta Air Lines Inc <DAL.N> and Aeromexico <AEROMEX.MX>.


The decision lets Delta and Aeromexico cooperate with immunity from U.S. antitrust law, and paves the way for the two companies to dominate the second-busiest market for travel to or from the United States.


The department granted tentative approval to the arrangement on Nov. 4.


(Reporting by Eric Beech; Editing by Mohammad Zargham)