Cheap flights from Chicago (CHI) to Ontario (ONT) from $70

Ontario (ONT) is the airport you will fly into if you book a flight from Chicago to Ontario. You should not have trouble finding flights to Ontario from Chicago; the airport handles an average of 2 inbound flights from Chicago per day. You should also have plenty of airline options to choose from since 5 airlines have flights to the Ontario airport from Chicago. It is only a 3.1 mi journey from Ontario (ONT) to Ontario’s city center.

Yes, there are multiple flights from Chicago to Ontario for under $200. The cheapest flight booked recently is on Frontier for just $137, but on average you can expect to pay $143.

Cheapflights has at least 1 direct flight from Chicago to Ontario under $900. A good price for a nonstop flight from Chicago to Ontario is less than $880.

There are currently 20+ open flights from Chicago to Ontario within the next 7 days for less than $200.

Flying on Frontier is currently your cheapest option to Ontario, with prices starting at $137. Frontier is currently priced 61% below the average price you’ll pay for this route.

ORD stands for Chicago O'Hare Intl Airport, while ONT stands for Ontario Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Chicago Midway Airport (MDW), Chicago Greater Rockford Airport (RFD) are other airports near this flight route and their unique identifiers/IATA codes.

The amount of baggage you can bring on your Chicago to Ontario flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

Yes, Cheapflights allows you to browse and filter Chicago to Ontario flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

Yes. In addition to deals on Chicago to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Ontario.

Yes. Cheapflights offers flight deals from Chicago to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Many airlines flying from Chicago to Ontario offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

Yes, you can often find last-minute deals on Chicago to Ontario flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

The Chicago to Ontario flight deals you see on this page were last updated on 5/30.

Before booking your flight from Chicago to Ontario check out the most popular airlines for this route: American Airlines, Delta or Frontier.

Currently, October is the cheapest month in which you can book a flight from Chicago to Ontario (average of $238). Flying from Chicago to Ontario in July is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.