What is the city code for Ontario, California?

The city code for Ontario, California, is ONT. This three-letter designation is used to identify Ontario International Airport, which serves the City of Ontario and the surrounding region. Each airport has a unique IATA (International Air Transport Association) code that helps travelers recognize and differentiate between various locations easily. Ontario International Airport’s designation as ONT is consistent with this practice, allowing for efficient travel planning and communication.

In contrast, the other codes represent different locations: OAK is the airport code for Oakland, California; RNO is for Reno, Nevada; and SMF represents Sacramento, California. Understanding these codes is crucial for identifying airports correctly, especially when booking flights or planning trips. This knowledge helps clarify where flights are arriving and departing, ensuring smoother travel experiences.