Flights from London to Illinois

Flight deals from London to Illinois

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

Chicago.£254 per passenger.Departing Mon, 21 Apr, returning Tue, 29 Apr.Return flight with SWISS.Outbound indirect flight with SWISS, departs from London Heathrow on Mon, 21 Apr, arriving in Chicago O'Hare International.Inbound indirect flight with SWISS, departs from Chicago O'Hare International on Tue, 29 Apr, arriving in London City.Price includes taxes and charges.From £254, select.

Peoria.£648 per passenger.Departing Fri, 2 May, returning Sun, 11 May.Return flight with Norse Atlantic Airways (UK) and Allegiant Air.Outbound indirect flight with Norse Atlantic Airways (UK), departs from London Gatwick on Fri, 2 May, arriving in Greater Peoria.Inbound indirect flight with Allegiant Air, departs from Greater Peoria on Sun, 11 May, arriving in London Gatwick.Price includes taxes and charges.From £648, select.

Marion.£787 per passenger.Departing Fri, 28 Mar, returning Mon, 31 Mar.Return flight with Air Transat and Contour Airlines.Outbound indirect flight with Air Transat, departs from London Gatwick on Fri, 28 Mar, arriving in Marion.Inbound indirect flight with Contour Airlines, departs from Marion on Mon, 31 Mar, arriving in London Gatwick.Price includes taxes and charges.From £787, select.

Moline.£795 per passenger.Departing Tue, 2 Sep, returning Tue, 30 Sep.Return flight with Brussels Airlines and United.Outbound indirect flight with Brussels Airlines, departs from London Heathrow on Tue, 2 Sep, arriving in Moline.Inbound indirect flight with United, departs from Moline on Tue, 30 Sep, arriving in London Heathrow.Price includes taxes and charges.From £795, select.

Springfield.£818 per passenger.Departing Tue, 2 Sep, returning Tue, 30 Sep.Return flight with British Airways.Outbound indirect flight with British Airways, departs from London Heathrow on Tue, 2 Sep, arriving in Springfield.Inbound indirect flight with British Airways, departs from Springfield on Tue, 30 Sep, arriving in London Heathrow.Price includes taxes and charges.From £818, select.

Bloomington.£834 per passenger.Departing Tue, 2 Sep, returning Tue, 30 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from London Heathrow on Tue, 2 Sep, arriving in Central Illinois Regional.Inbound indirect flight with Delta, departs from Central Illinois Regional on Tue, 30 Sep, arriving in London Heathrow.Price includes taxes and charges.From £834, select.

Champaign.£893 per passenger.Departing Fri, 2 May, returning Fri, 9 May.Return flight with British Airways.Outbound indirect flight with British Airways, departs from London Heathrow on Fri, 2 May, arriving in Champaign.Inbound indirect flight with British Airways, departs from Champaign on Fri, 9 May, arriving in London Heathrow.Price includes taxes and charges.From £893, select.

Quincy.£937 per passenger.Departing Fri, 2 May, returning Fri, 9 May.Return flight with Turkish Airlines and Southern Airways Express.Outbound indirect flight with Turkish Airlines, departs from London Heathrow on Fri, 2 May, arriving in Quincy.Inbound indirect flight with Southern Airways Express, departs from Quincy on Fri, 9 May, arriving in London Heathrow.Price includes taxes and charges.From £937, select.

Flying from London to Illinois

Arm yourself with these facts on the fly.

Cheapest flight found	£254, Chicago
Cheapest month to fly	April
Average flight time	8 hrs, 56 mins
Cheapest airport to fly from	London Heathrow
Most popular airline	Finnair

How to find cheap flights from London to Illinois

We've compared the best online travel agents and flight providers on the internet to find the cheapest plane tickets from London to Illinois. Other savvy travellers recently found return flights from £254 and one-way tickets from £193 one-way. Ready to join them? Here are a few tips to help you do it the smart way.

Fly from London Gatwick into Chicago

At the moment, the lowest priced flight tickets to Illinois are from London Gatwick Airport to Chicago O'Hare International Airport.

Fly in April

We crunched the flight calendar and found the cheapest time to fly from London to Illinois is currently April.

Fly on a Tuesday

From our data, we can see that Tuesday seems to be the cheapest time to fly from London 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 London to anywhere you choose in Illinois.

Watch as fares rise and fall

With Price Alerts, we'll let you know when flight prices from London to 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 London to Illinois flight price you see when you search with us is what you pay to the provider.

Frequently asked questions

What's the average London to Illinois flight price?

We looked at all of the upcoming return flights from London to Illinois we could find over the next 12 months. It looks like £254 is the best price. This is good, compared to the average Illinois ticket price of £628.

What is the cheapest month to fly from London to Illinois?

The cheapest month to fly from London to Springfield Airport is usually September. The cheapest month to fly from London to Central Illinois Regional Airport is usually September. The cheapest month to fly from London to Greater Peoria Airport is usually May. And the cheapest month to fly from London to Champaign Airport is usually May.

Which upcoming date is cheapest to fly from London to Illinois on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from London to Illinois on Monday, 21 April 2025.

Are there any direct flights from London to Illinois?

London Heathrow Airport offers direct flights to Illinois.

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

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