Flights from Ontario International Airport to Illinois

Flight deals from Ontario International Airport to Illinois

Looking for cheap tickets from Ontario International Airport to Illinois, or a last-minute trip? Find the lowest prices on one-way and return tickets right here.

Chicago.R 4,064 per passenger.Departing Sun, 29 Jun, returning Fri, 4 Jul.Return flight with United.Outbound direct flight with United departs from Ontario International on Sun, 29 Jun, arriving in Chicago O'Hare International.Inbound direct flight with United departs from Chicago O'Hare International on Fri, 4 Jul, arriving in Ontario International.Price includes taxes and charges.From R 4,064, select.

Bloomington.R 11,178 per passenger.Departing Wed, 28 May, returning Thu, 5 Jun.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Wed, 28 May, arriving in Central Illinois Regional.Inbound indirect flight with Delta, departs from Central Illinois Regional on Thu, 5 Jun, arriving in Ontario International.Price includes taxes and charges.From R 11,178, select.

Flying from Ontario International Airport to Illinois

Arm yourself with these facts on the fly.

Cheapest flight found	R 2,028, Chicago
Cheapest month to fly	October
Average flight time	3 hrs, 56 mins
Average flights per week	32
Most popular airline	Southwest Airlines

How to find cheap flights from Ontario International Airport to Illinois

We've compared the best online travel agents and flight providers on the internet to find the cheapest plane tickets from Ontario International Airport to Illinois. Other savvy travellers recently found return flights from R 4,056 and one-way tickets from R 2,032. Ready to join them? Here are a few tips to help you do it the smart way.

Fly in October

The cheapest time to fly from Ontario International Airport to Illinois is currently October.

Fly on a Friday

From our data, we can see that Friday seems to be the cheapest time to fly from Ontario International Airport to Illinois.

Flex your dates for the best rates

If you’re flexible on your departure dates, you can use Skyscanner's whole month tool to find the cheapest day of the year to fly from Ontario International Airport to anywhere you choose in Illinois.

Watch as fares rise and fall

With Price Alerts, we'll let you know when flight prices from Ontario International Airport to your chosen airport in Illinois go up or down so you can book when the time is just right.

Relax – these are fee-free flight tickets

With us, there are no added fees – the Ontario International Airport to Illinois flight price you see when you search with us is what you pay to the provider.

Frequently asked questions

Are there any direct flights from Ontario International Airport to Illinois?

Yes - direct flights currently operate from Ontario International Airport to Chicago O'Hare International Airport in Illinois.

What is the average price of a flight from Ontario International Airport to Illinois?

We looked at all of the upcoming return flights from Ontario International Airport to Illinois we could find over the next 12 months. It looks like R 4,056 is the best price. This is good, compared to the average Illinois ticket price of R 7,829.

What is the cheapest month to fly from Ontario International Airport to Illinois?

The cheapest month to fly from Ontario International Airport to Chicago O'Hare International Airport is currently June.
The cheapest month to fly from Ontario International Airport to Central Illinois Regional Airport is usually May.

Which upcoming date is cheapest to fly from Ontario International Airport to Illinois on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Ontario International Airport to Illinois on Sunday, 29 June 2025.

If I'm flying from Ontario International Airport, where in Illinois is cheapest to fly into?

If you're flying from Ontario International, the cheapest city in Illinois to fly into is Chicago. The cheapest airport serving Chicago at the moment is Chicago O'Hare International.

How long is the flight from Ontario International Airport to Illinois?

The average flight time between Ontario International Airport and Illinois is 3 hours and 55 minutes.