Ontario executive suites and fully furnished turnkey flexible office space for lease on Guasti Road, Suite 100, Ontario, CA 91761. This Ontario business center offers ready to go executive office suites, temporary office space for rent, virtual offices, mailing addresses and office space for lease on flexible terms. Our Waterside office business center in Ontario is located in the prestigious Waterside Center office complex. Just 35 miles inland from Los Angeles, our center is strategically located at Haven Avenue and Guasti Road, immediately off the 10 Freeway, with close proximity to Interstate 15. We are adjacent to the Ontario International Airport and close to the Ontario Convention Center. Additionally, our Ontario location offers access to many restaurants and hotels, as well as shopping complexes.