Cheap Flights to Illinois from £686 Return

Q: What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois is currently May .

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Find where to fly in Illinois

You could visit 13 destinations in Illinois – explore your options right here.

Chicago

1+ stopsFrom £686

Flight deals to Illinois

Find the best prices for one-way or return flights to Illinois's most popular spots.

Chicago.£686 per passenger.Departing Sat, 10 May, returning Sat, 17 May.Return flight with Aurigny and Spirit Airlines.Outbound indirect flight with Aurigny, departs from Guernsey on Sat, 10 May, arriving in Chicago O'Hare International.Inbound indirect flight with Spirit Airlines, departs from Chicago O'Hare International on Sat, 17 May, arriving in Guernsey.Price includes taxes and charges.From £686, select.

Flying to Illinois

The things to know before you go.

Cheapest flight found	£686, Chicago
Cheapest month to fly	May
Cheapest airport to fly from	Guernsey

How to find cheap one-way and return flights to Illinois

Here are a few tips on how to find the best price for Illinois flights.

Simply hit 'search'

We've compared all the best online travel agents and flight providers out there to find the cheapest plane tickets to Illinois. And with us, there are no added fees – what you see is what you pay.

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 travel to any city you choose in Illinois.

Set up a Price Alert

We'll let you know when flight prices to Illinois go up or down so you can book when the time is just right.

Book flights to Illinois on the Skyscanner app

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Book flight tickets to Illinois with extra peace of mind

Find flexible getaways

Keep an eye out for flexible ticket options to Illinois. If you go for a flexible plane ticket, you won’t lose out if your flight is cancelled or needs to be changed.

Book spotless stays

Check out the hotels in Illinois with sparkling 5/5 cleanliness ratings, or bag a room with free cancellation.

Get insured

Choose travel cost protection that covers against any unexpected hiccups before or during your trip. With the right travel insurance, you won’t lose out on money if your flights to Illinois are changed or cancelled or your trip is cut short.

Frequently asked questions

Which airlines fly direct to Illinois?

Currently, there are no airlines that fly direct to Illinois. But we found flights with one or more stops from £686.

Which is the cheapest airline to fly to Illinois with?

Currently, Aurigny offers the cheapest flight tickets to Illinois.

How much is the cheapest flight ticket to Illinois?

We looked at upcoming return flights to Illinois departing over the next 12 months and found that Guernsey Airport to Chicago O'Hare International Airport for £686 is the best price.

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois is currently May.

What is the cheapest day to fly to Illinois?

The cheapest day to fly to Illinois is currently Saturday, 10 May 2025.

Where's cheapest to fly into in Illinois?

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