Planning a flight from Ontario to Chicago O'Hare?

Flight prices from Ontario to Chicago change depending on demand and time of booking.

The lowest fare seen in the past 15 days was $125.

Many users find better fares by booking several weeks in advance. In fact, for many routes, booking early is one of the best ways to save.

Is there more than one airport in Ontario or Chicago?

Even short-haul routes can benefit from considering secondary airports. It may open up more flight times or cheaper fares.

• Airports in Ontario: Only Ontario is currently operational.
• Airports in Chicago: Chicago has 3 airports - Midway, O'Hare, Rockford.

Airports with more daily flights offer more flexibility if plans change or delays occur. If you’re flexible, consider airports near Chicago as well.

Adjust your flight filters for Ontario – Chicago O'Hare

Jetcost gives you tools to search smarter. Pick your ideal price range, airline, departure time, and flight type — then compare offers from agencies like Expedia, eDreams, and more.

Other popular destinations

Planning a trip to United States? These cities are popular too: Las Vegas, Los Angeles, Miami, New York City, Orlando.

Sorting options let you see the most affordable flights first. Some results may include extra fees shown only at checkout — always read carefully to see what’s included.