Ontario International Airport is located two miles East of downtown Ontario, in San Bernardino County CA. This is the airport of choice for many Inland Empire residences. It is owned and operated under a joint powers agreement with the city of Ontario and San Bernardino County.
In 2015, 4.2 million passengers used the Ontario International Airport, which was slightly higher than 2014 with 4.1 million passengers. Recently, the airport handled 5.1 million passengers, breaking the 5 million mark. In 2018 Southwest Airlines carried almost 57% of departing passengers.