Lufthansa Miles & More members can earn double miles when staying at a Langham Hospitality Group hotel before September 30.
To qualify, members must book a stay at a participating property as part of Langham's "Linger Longer" package.
A maximum of 2,500 bonus miles can be earned - the standard 500 award miles for the first night and 1,000 award miles (double) for both the second and third nights.
Members must quote promotion code LHMY15LL and their membership number at the time of booking, when a one-night non-refundable deposit at the qualifying rate will be taken.
The participating properties are The Langham, Auckland; The Langham, Boston; The Langham, Chicago; The Langham, Hong Kong; The Langham Huntington, Pasadena, Los Angeles; The Langham, London; The Langham, Melbourne; The Langham, Sydney; The Langham, Shanghai, Xintiandi; The Langham, Shenzhen; Langham Place, Beijing Capital Airport; Langham Place, Guangzhou; Langham Place, Mongkok, Hong Kong; Langham Place, New York, Fifth Avenue; Langham Place, Ningbo Culture Plaza; and Langham Place, Xiamen.
Last month, Langham opened Langham Place, Haining, its seventh hotel in China (see news, July 22).