Billy J's Restaurant Address: 9976 Sierra Ave, Fontana, CA 92335 Phone: (909) 350-0939 Hours: Mon: 7am-9pm Tue: 7am-9pm Wed: 7am-9pm Thu: 7am-9pm Fri: 7am-9pm Sat: 7am-9pm Sun: 7am-9pm Restaurants Other Businesses: McDonald's at 10143 Sierra Ave, Fontana, CA 92335 Burger King at 10067 Sierra Ave, Fontana, CA 92335 Wienerschnitzel at 10056 Sierra Ave, Fontana, CA 92335 Jack in the Box at 14485 Foothill Blvd, Fontana, CA 92335 La Bufa Bakery at 9928 Sierra Ave, Fontana, CA 92335