Portus House Istanbul Guests checking into the Portus House Istanbul in Istanbul are assured of a warm welcome. The hotel offers off site car parking. Hotel guests can enjoy a meal at the restaurant on site. Rooms at the Portus House Istanbul. Smoking is permitted in certain bedrooms (please specify when booking) and the public areas of the hotel. Rooms have wireless internet access available. Other Info. An airport shuttle service is available from the hotel. Pets are most welcome at the hotel. Hotel guests can make use of the concierge service that is provided.