Ontario International Airport — Ontario, United States

Ownership history sets ONT apart from most mid-sized American airports: for decades it was run by Los Angeles World Airports as a satellite of LAX, before Inland Empire leaders won a lengthy legal and political campaign to return control to a locally formed authority in 2016. Since regaining local governance, Ontario International has emphasized both passenger growth and its long-standing role as a cargo powerhouse, with UPS and FedEx operating major sorting hubs that make it one of the busier freight airports in the United States. Situated in San Bernardino County roughly 35 miles east of downtown Los Angeles, it offers a practical alternative for Inland Empire residents who would otherwise face a long drive to LAX through frequently congested freeways. Two parallel runways support a growing slate of domestic routes alongside a small but expanding roster of international service.