Use Expedia to help you arrange a flight to Oakland Intl. Airport (OAK) airport or San Francisco Intl. Airport (SFO) airport, and then choose from a variety of places to stay that will deliver the luxury you want. Amenities are an important consideration when you plan a trip, so we make it easy to find what you’d like to make your stay special. If you want a posh hotel with a spa, an indoor pool, or luxury bedding, Expedia can assist you in finding the best luxury hotel experience that Union Square has to offer. During your visit, you might want to enjoy the art and shopping which Union Square is known for.