Maps and GPS directions to Ibis Sibir Omsk and other Accor Hotels in Russia. Find your nearest Accor Hotels. Accor is the world's largest hotel and tourism group with more than 3500 hotels and resorts in 90 countries, with the most comprehensive choice of hotel styles and locations. Accor's hotel brands include the luxury of Sofitel, business class of Novotel, variety of All Seasons, flexibility of Mercure, value of Ibis and convenience of Formule 1. Accor is also one of the global leaders in tourism, travel, casinos, restaurants and the provision of corporate and public institution services.