Inside Ontario International Airport (ONT): Complete Terminal and Facilities Map Guide

The Ontario International Airport (ONT) is in Ontario, California, 38 miles east of downtown Los Angeles. The airport is located on 1,741 acres with two parallel runways. It is a key center of UPS Airline and FedEx Express shipping activities. ONT is a significant alternative to the crowded LAX airport with more than 64 flights per day. It has the longest runway and can accommodate large aircraft; this airport has been used as a backup landing place for flights in the Los Angeles International Airport.

Distances From Major Cities

The Ontario International Airport is well-situated in Southern California, which gives it easy access to major cities and destinations within the area. The table below indicates distances and approximate driving times from ONT to other major destinations.

Ontario International Airport - Passenger Statistics (2020-2024)

The past six years have been marked by considerable fluctuations in the passenger traffic at Ontario International Airport, which indicates the struggles and the revival of the aviation sector. The table below indicates the number of passengers and the growth rate in the period between 2020 and 2024.

Largest Airlines at Ontario International Airport (ONT)

The Ontario International Airport is a hub of various major airlines, with Southwest Airlines being the dominant carrier in the market. The airline mix of this airport is characterized by a high representation of low-cost airlines, which makes it a good choice for low-cost passengers. More than one-third of all passenger traffic at ONT is accounted for by Southwest Airlines alone. The table below indicates the top 5 airlines in terms of passengers from April 2024 to March 2025.

Ontario International Airport - Terminals Information

The Ontario International Airport has two passenger terminals, including 28 gates in total. Other facilities at the airport are a dedicated international arrival building and ground transport services.

(Map Reference:https://www.flyontario.com/at-airport/terminal-maps)

Terminal 2

Terminal 2 is spread over 265,000 square feet and has 12 gates with all the necessary services and amenities. The terminal contains many dining and shopping outlets, lounges, parking facilities, and much more. Moreover, the airlines that are served by this terminal include

• Alaska Airlines,

• Avianca El Salvador

• China Airlines

• Delta Air Lines

• Frontier Airlines

• JetBlue

• United Airlines

• Volaris

Terminal 4

Terminal 4 is as big as Terminal 2 (265,000 square feet), but it has 14 gates in total. This terminal has all the necessary services, including lounges, parking facilities, dining and shopping options, and much more to choose from. Furthermore, the airlines that are served at this terminal are:

• American Airlines

• Hawaiian Airlines

• Southwest Airlines

International Arrivals Facility

The international arrivals building of the airport has 2 gates, which are exclusively used by arriving flights. The U.S. Customs and Border Protection area, where international passengers undergo immigration and customs, is located in this facility. Although international flights land at this facility, they depart at the main terminals. This facility is currently served by three airlines:

• Avianca

• China Airlines

• Volaris

Additional Facilities

• The old terminal building also contains a USO (United Service Organizations) center adjacent to the international arrivals facility

• Remote parking is situated on the eastern side of the airport

• All the rental car companies are united in a ground transportation center on the east end

• The Omnitrans 61 bus serves all the terminals, parking lots, and the public transportation stops in the airport

(Map Reference:https://www.flyontario.com/at-airport/terminal-maps)

Conclusion

Ontario International Airport is a key entry point in Southern California, which gives passengers an alternative to the busier airports such as LAX. ONT has continued to serve millions of passengers every year with stable passenger growth, new facilities, and airline partnerships. It is strategically located and has easy access to major cities in the region. Regardless of whether the travel is business or leisure, Ontario International Airport is a significant hub that links Southern California to the rest of the world and makes travel easier and more convenient.

(Source - https://en.wikipedia.org/wiki/Ontario_International_Airport)