Derby Hotels Offer: Save Up To 20% at Arai Aparthotel Barcelona Spain. At Hotel Arai in Barcelona book your stay prior 14 days to arrival and get 20% off and later on get 10% off only Valid for bookings made by 30 June 2016 Enjoy your holidays. Terms & Conditions:. Get 20% off on stay prior 14 days to arrival or 10% discount by making it later on. Offer valid till 30th June 2016. Book Now.