Built in 1994 by Fullmer construction featuring 24-28' ceilings, 7 loading docks, 2 ground level doors and a fenced yard. Ontario is a city in southwestern San Bernardino County in the US state of California, 35 miles east of downtown Los Angeles and 23 miles west of downtown San Bernardino, the county seat. Located in the western part of the Inland Empire metropolitan area, it lies just east of Los Angeles County and is part of the Greater Los Angeles Area. The city is home to the Ontario International Airport, which is the 15th-busiest airport in the United States by cargo carried. Ontario handles the mass of freight traffic between the ports of Los Angeles and Long Beach and the rest of the country.