Flights from Ottawa International Airport to Illinois

Flight deals from Ottawa International Airport to Illinois

Looking for a cheap last-minute deal or the best roundtrip flight from Ottawa International Airport to Illinois? If you want to travel next month, roundtrip fares start from 323 €. Find the lowest prices on one-way and roundtrip tickets right here.

Chicago.323 € per passenger.Departing Fri, Jun 12, returning Fri, Jun 19.Round-trip flight with WestJet and Porter Airlines.Outbound indirect flight with WestJet, departing from Ottawa International on Fri, Jun 12, arriving in Chicago Midway.Inbound indirect flight with Porter Airlines, departing from Chicago Midway on Fri, Jun 19, arriving in Ottawa International.Price includes taxes and charges.From 323 €, select.

Moline.437 € per passenger.Departing Wed, Jul 15, returning Mon, Jul 20.Round-trip flight with United.Outbound indirect flight with United, departing from Ottawa International on Wed, Jul 15, arriving in Moline.Inbound indirect flight with United, departing from Moline on Mon, Jul 20, arriving in Ottawa International.Price includes taxes and charges.From 437 €, select.

Chicago.525 € per passenger.Departing Sun, Aug 9, returning Wed, Aug 12.Round-trip flight with Air Canada.Outbound direct flight with Air Canada departing from Ottawa International on Sun, Aug 9, arriving in Chicago O'Hare International.Inbound direct flight with Air Canada departing from Chicago O'Hare International on Wed, Aug 12, arriving in Ottawa International.Price includes taxes and charges.From 525 €, select.

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Flying from Ottawa International Airport to Illinois

Arm yourself with these facts on the fly.

Cheapest flight found	323 €
Cheapest month to fly	June
Average flight time	2 hrs, 27 mins
Average flights per week	107
Most popular airline	United

How to find cheap flights from Ottawa 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 Ottawa International Airport to Illinois. Other savvy travelers recently found round-trip flights from 323 € and one-way tickets from 180 €. Ready to join them? Here are a few tips to help you do it the smart way.

Fly in June

The cheapest time to fly from Ottawa International Airport to Illinois is currently June.

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 Ottawa International Airport to anywhere you choose in Illinois.

Watch as flight prices go up and down

With Price Alerts, we'll let you know when flight prices from Ottawa 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 plane tickets

With us, there are no added fees – the Illinois 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 Ottawa International Airport to Illinois?

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

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

We looked at all of the upcoming round-trip flights from Ottawa International Airport to Illinois we could find over the next 12 months. It looks like 323 € is the best price. This is good, compared to the average Illinois ticket price of 428 €.

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

The cheapest month to fly from Ottawa International Airport to Moline Airport is currently July.
The cheapest month to fly from Ottawa International Airport to Chicago O'Hare International Airport is currently August.
And the cheapest month to fly from Ottawa International Airport to Chicago Midway Airport is usually June.

On which upcoming date is it cheapest to fly from Ottawa International Airport to Illinois?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Ottawa International Airport to Illinois on Friday, June 12, 2026.

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

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