Delta Air Lines (DAL) - Get Report, integrating its fleet with recently acquired Northwest Airlines, plans to seek significant changes to aircraft orders that both carriers had placed individually with Boeing, the Wall Street Journal reports.

Delta is likely to scale back a Northwest order for Boeing's new, but delayed, 787 Dreamliner, and ask the manufacturer to expand a Delta order for the 777-200LR, a long-range aircraft that carries at least 50 more passengers and would better enable the combined carrier to continue pursuing Delta's strategy to shift a greater percentage of its flights to long overseas routes, the newspaper reports.

No final decisions have been made regarding new aircraft, according to people familiar with Delta's plans, and Delta has yet to officially ask Boeing to alter its order book, the

Journal

reports.

A change in Delta orders is unlikely to disrupt Boeing's manufacturing schedule or hurt its bottom line because other customers are lined up behind Northwest for 787s, and the manufacturer is happy to expand its order book for the more expensive 777-200LR, the

Journal

reports.

Northwest, which had been the U.S. launch customer for the Dreamliner, has a firm order for 18 787 Dreamliners and options for many more. Delta's current order for 777-200LRs, two of which were delivered this year, foresees delivery of another three in 2009 and an additional five in following years, the newspaper said.

This article was written by a staff member of TheStreet.com.