Ontario International Airport (ONT) officials said they are pleased to learn United Airlines will begin daily nonstop service between the Inland Empire and Chicago O'Hare International Airport (ORD) in May 2025.

The service between Ontario and Chicago O'Hare will begin May 22 in the westbound direction, and May 23 in the eastbound direction, with a daily departure from ONT at 7 a.m. Pacific Time and a return flight departing ORD at 7:55 p.m. Central Time.

The flights are timed to offer travelers convenient connections to and from United's global hub serving more than 180 nonstop destinations worldwide.

United will launch the route using a Boeing 737-800 aircraft equipped with 166 seats in three classes: First, Economy Plus and Economy.

The Chicago service will complement United's existing nonstop service from ONT to Denver, Houston and San Francisco.

The United Airlines announcement comes as ONT welcomed more than 7 million travelers in 2024, 27% more than pre-pandemic 2019 and a 67% increase since 2016 when ONT was transferred to local control from the City of Los Angeles. Ontario is the fastest growing among medium- and large-size airports in California.