Japan Airlines says it will purchase 30 Boeing 7E7 Dreamliner aircraft, with an option to buy 20 more.

The price of the deal was not disclosed, but could be around $4 billion. Japan Airlines is expected to receive its first Boeing Dreamliner in 2008. Boeing and European rival Airbus were competing for the Japan Airlines deal. Boeing and Airbus have been battling in recent months to win contracts with Asian airliners.

Boeing recently reached a deal with Japan's All Nippon Airways, while Airbus inked a contract with Malaysia's AirAsia.

Some information for this report provided by AP and Reuters.