Guests who book a three-night stay at any Dorchester Collection hotel in Europe and North America can receive the third night for free.
The "3 Nights For The Price Of 2" promotion is valid for stays taken between December 14 and April 3. Bookings must be made by February 29.
The free night is valid when rooms are booked for three nights or more, with "any additional nights being charged at the best available rate at the time of booking". The rate is based on double occupancy.
The offer does not apply to Classic Rooms at Hotel Principe di Savoia and excludes Hotel Eden in Rome which is closed for restoration (see news, October 26).
Helen Smith, Dorchester Collection's vice president of sales and marketing, said: "The additional complimentary night is exceptional added value for guests who want longer to enjoy the various hotel offerings, including award-winning spa facilities and restaurants, whilst having more time to discover the destination."
Blackout dates apply at select properties. Click here for more information.