by Lacey Pfalz
Last updated: 10:50 AM ET, Thu July 2, 2026
American Airlines will begin daily nonstop service between Chicago O'Hare International Airport (ORD) and Southern California's Ontario International Airport (ONT) beginning December 17, 2026.
The round-trip service will depart ONT at 6:00 a.m. local time and arrive in ORD around noon, with the return service departing ORD at 6:15 p.m. local time and arriving in ONT around 8:48 p.m.
The flights, which will be available for sale beginning July 6, will be operated via a Boeing 737 aircraft with 172 seats and three seat categories.
American also flies routes to Southern California nonstop via ONT from Dallas-Fort Worth, Charlotte and Phoenix.
"American Airlines is a long-valued partner of our airport, having served the area's residential and business communities since 1970. We welcome this new service and wish our friends much success as they continue to invest in our airport and our region," said Alan D. Wapner, president of the Ontario International Airport Authority (OIAA) and City of Ontario mayor pro Tem.
"As demand for air travel in Southern California grows, airlines and air travelers are turning to Ontario for its affordability, ease of access and exceptional customer service, not to mention our world class facilities and amenities, all of which makes Ontario the airport of choice in greater Los Angeles."
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