Hotel search engine Room Key reached agreements with La Quinta Inns & Suites, Millennium Hotels & Resorts and Leading Hotels of the World.

Room Key said the addition of the three hotel companies this fall would double its inventory when they become available through the tool. Room Key launched at the beginning of this year by six multinational hotel companies as a means to drive down distribution costs. The meta-search engine cited Google Analytics in claiming 14 million visits per month.