Sonder Onyx features accommodation within 800 metres of the centre of Philadelphia, with free WiFi, and a kitchen with a dishwasher, an oven and a microwave. The air-conditioned accommodation is 1.1 km from Barnes Foundation. Liberty Bell is 2.2 km away and National Liberty Museum is 2.5 km from the aparthotel. At the aparthotel, each unit is fitted with a wardrobe, a flat-screen TV, a private bathroom, bed linen and towels. A toaster, a fridge and stovetop are also available, as well as a coffee machine and a kettle. The units are equipped with heating facilities. Popular points of interest near the aparthotel include Pennsylvania Convention Center, Philadelphia Museum of Art and Mutter Museum. The nearest airport is Philadelphia International Airport, 16 km from Sonder Onyx.