Cheap Flights from Chicago to Ontario Starting at $61

Looking for affordable flights from Chicago to Ontario? Look no further! Our air ticket search website offers the best deals on flights from Chicago, United States to Ontario, United States. Whether you're planning a business trip or a weekend getaway, we've got you covered with cheap flights that won't break the bank. With a user-friendly interface and a wide range of flight options, finding the perfect airfare has never been easier. So why wait? Start your search now and book your tickets to Ontario at unbeatable prices. Don't miss out on this opportunity to save big on your next flight!

The route Chicago — Ontario is served by many carriers — 8 in total, including American Airlines, Southwest Airlines, United Airlines, Frontier Airlines, Spirit Airlines, Alaska Airlines, Sun Country Airlines, and Allegiant Air. This gives passengers wide opportunities: from finding the lowest fare (from $61) to selecting flights by schedule or service class. Our service aggregates data from multiple booking systems so you can compare offers in one place. This saves time and money: no need to check dozens of sites — just pick the right option and book online.

In different months, ticket prices from Chicago to Ontario vary: minimum — $92 (November 2025), maximum — $305 (March 2026). Typically, the flight costs $208–$485.