LA/Ontario International Airport (ONT) is a medium-hub, full-service airport with commercial jet service to major U.S. cities and through service to many international destinations. ONT is located in the Inland Empire, approximately 35 miles east of downtown Los Angeles in the center of Southern California. The airport is the centerpiece of one of the fastest-growing transportation regions in the United States. ONT's service area includes a population of six million people living in San Bernardino and Riverside Counties and portions of north Orange County and east Los Angeles County. Passenger traffic at ONT has been increasing steadily for the past 10 years. In 2006, 7 million passengers used the airport and 602,326 tons of air freight were shipped.

ONT's more than 220 daily flights provide service to every major city in the U.S. ONT's airlines include AeroMexico, Alaska/Horizon, American, Continental, Delta, Great Lakes, Southwest, United/United Express, and US Airways. The "new" Ontario International Airport opened September 27, 1998. The $270 million project includes two new terminals at 265,000 square foot each for a total of 530,000 square feet, a new ground transportation center, an additional parking lot and new roadway system, airfield improvements, landscaping, and a site storm-drain system. The new terminals are eight times larger than the former terminal and can accommodate up to 10 million passengers a year. When passenger traffic at ONT reaches 10 million in two consecutive years, a third terminal will be constructed.

ONT is also the center of a rapidly developing freight movement system that includes the airport, two railroads, four major freeways, and an expanding network of freight forwarders. ONT is served by major U.S. air freight carriers including Ameriflight, Federal Express, Kalitta Air, Miami Air International, Inc., Sierra Pacific Airlines, United Parcel Service, Air Transport Int’l, Arrow Air, Inc., Empire Airlines, IFL Group, Inc., and USA Jet. ONT is a member of the Los Angeles World Airports system and is ideally situated as an airfreight center for Pacific Rim and European cargo. The airport is less than 50 miles from Los Angeles and Long Beach Harbors .