HONG KONG (Reuters) - China Southern Airlines <600029.SS> said on Wednesday its subsidiary, Xiamen Airlines, had signed an agreement to buy six airplanes from Boeing Co <BA.N> worth $1.4 billion at list prices.

China Southern Airlines Co Ltd <1055.HK> <ZNH.N>, and its subsidiary, Xiamen Airlines, have been placing large aircraft orders as they look to expand fleets to meet booming growth in travel by Chinese.

The B787-9 airplanes will be delivered to Xiamen Airlines between 2016 to 2018, China Southern told the Shanghai stock exchange in a statement.

Xiamen Airlines signed a memorandum of understanding (MOU) to buy up to 30 Boeing 737 MAX 200 airplanes early this month.

(Reporting by Twinnie Siu and Meg Shen; Editing by Clarence Fernandez)