American Airlines will introduce daily nonstop service between Ontario International Airport and Chicago O'Hare International Airport starting Dec. 17, 2026.
"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."
The roundtrip service will include an early morning departure from ONT with a mid-evening arrival on the return flight.
Flight | Departure | Arrival |
| Ontario to Chicago | 6:00 a.m. PST | 12:15 p.m. CST |
| Chicago to Ontario | 6:15 p.m. CST | 8:48 p.m. PST |
American will operate its Boeing 737 aircraft equipped with 172 seats in three classes, including 16 First Class, 24 Main Cabin Extra and 132 Main Cabin seats. The new flight complement's existing service in the market flown by United Airlines.
American consistently ranks among the top 5 ONT airlines in passenger volume with additional nonstop service from Ontario to several of its key hubs, including Dallas-Fort Worth (DFW), Charlotte (CLT), and Phoenix (PHX).
This year marks the 10th anniversary of ONT's return to local ownership. Since then, American Airlines has increased its flights at ONT by 25 percent and the number of seats offered by 66 percent.
Flights will be available for booking beginning Monday, July 6, at www.aa.com.
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