Cheap Flights from London Heathrow to Chicago

Compare London Heathrow to Chicago flight deals

Find the cheapest month or even day of the year to fly to Chicago

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Flight deals from London Heathrow to Chicago

Looking for a cheap last-minute deal or the best return flight from London Heathrow Airport to Chicago? If you want to travel next month, return fares start from $1,129. Find the lowest prices on one-way and return tickets right here.

Chicago.$1,103 per passenger.Departing Fri, 8 Jan, returning Mon, 1 Mar.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Fri, 8 Jan, arriving in Chicago O'Hare International.Inbound indirect flight with Icelandair, departs from Chicago O'Hare International on Mon, 1 Mar, arriving in London Heathrow.Price includes taxes and charges.From $1,103, select.

Chicago.$1,105 per passenger.Departing Fri, 29 Jan, returning Thu, 18 Feb.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Fri, 29 Jan, arriving in Chicago O'Hare International.Inbound indirect flight with Icelandair, departs from Chicago O'Hare International on Thu, 18 Feb, arriving in London Heathrow.Price includes taxes and charges.From $1,105, select.

Chicago.$1,105 per passenger.Departing Thu, 4 Mar, returning Sun, 7 Mar.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Thu, 4 Mar, arriving in Chicago O'Hare International.Inbound indirect flight with Icelandair, departs from Chicago O'Hare International on Sun, 7 Mar, arriving in London Heathrow.Price includes taxes and charges.From $1,105, select.

Chicago.$1,105 per passenger.Departing Wed, 24 Feb, returning Sun, 28 Feb.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Wed, 24 Feb, arriving in Chicago O'Hare International.Inbound indirect flight with Icelandair, departs from Chicago O'Hare International on Sun, 28 Feb, arriving in London Heathrow.Price includes taxes and charges.From $1,105, select.

Chicago.$1,105 per passenger.Departing Thu, 16 Apr, returning Sun, 26 Apr.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Thu, 16 Apr, arriving in Chicago O'Hare International.Inbound indirect flight with Icelandair, departs from Chicago O'Hare International on Sun, 26 Apr, arriving in London Heathrow.Price includes taxes and charges.From $1,105, select.

Chicago.$1,105 per passenger.Departing Thu, 14 Jan, returning Sun, 24 Jan.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Thu, 14 Jan, arriving in Chicago O'Hare International.Inbound indirect flight with Icelandair, departs from Chicago O'Hare International on Sun, 24 Jan, arriving in London Heathrow.Price includes taxes and charges.From $1,105, select.

Chicago.$1,105 per passenger.Departing Wed, 17 Feb, returning Wed, 3 Mar.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Wed, 17 Feb, arriving in Chicago O'Hare International.Inbound indirect flight with Icelandair, departs from Chicago O'Hare International on Wed, 3 Mar, arriving in London Heathrow.Price includes taxes and charges.From $1,105, select.

Chicago.$1,116 per passenger.Departing Thu, 30 Apr, returning Sun, 3 May.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Thu, 30 Apr, arriving in Chicago O'Hare International.Inbound indirect flight with Icelandair, departs from Chicago O'Hare International on Sun, 3 May, arriving in London Heathrow.Price includes taxes and charges.From $1,116, select.

Chicago.$1,129 per passenger.Departing Thu, 7 May, returning Sun, 10 May.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Thu, 7 May, arriving in Chicago O'Hare International.Inbound indirect flight with Icelandair, departs from Chicago O'Hare International on Sun, 10 May, arriving in London Heathrow.Price includes taxes and charges.From $1,129, select.

Chicago.$1,255 per passenger.Departing Wed, 25 Nov, returning Wed, 2 Dec.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Wed, 25 Nov, arriving in Chicago O'Hare International.Inbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Wed, 2 Dec, arriving in London Heathrow.Price includes taxes and charges.From $1,255, select.

Chicago.$1,255 per passenger.Departing Tue, 10 Nov, returning Tue, 17 Nov.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Tue, 10 Nov, arriving in Chicago O'Hare International.Inbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Tue, 17 Nov, arriving in London Heathrow.Price includes taxes and charges.From $1,255, select.

Chicago.$1,257 per passenger.Departing Thu, 15 Oct, returning Mon, 19 Oct.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Thu, 15 Oct, arriving in Chicago O'Hare International.Inbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Mon, 19 Oct, arriving in London Heathrow.Price includes taxes and charges.From $1,257, select.

Chicago.$1,257 per passenger.Departing Fri, 4 Dec, returning Mon, 7 Dec.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Fri, 4 Dec, arriving in Chicago O'Hare International.Inbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Mon, 7 Dec, arriving in London Heathrow.Price includes taxes and charges.From $1,257, select.

Chicago.$1,257 per passenger.Departing Sat, 30 May, returning Wed, 18 Nov.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Sat, 30 May, arriving in Chicago O'Hare International.Inbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Wed, 18 Nov, arriving in London Heathrow.Price includes taxes and charges.From $1,257, select.

Chicago.$1,258 per passenger.Departing Sun, 25 Oct, returning Sun, 1 Nov.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Sun, 25 Oct, arriving in Chicago O'Hare International.Inbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Sun, 1 Nov, arriving in London Heathrow.Price includes taxes and charges.From $1,258, select.

Chicago.$1,263 per passenger.Departing Tue, 25 Aug, returning Mon, 15 Mar.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Tue, 25 Aug, arriving in Chicago O'Hare International.Inbound indirect flight with Icelandair, departs from Chicago O'Hare International on Mon, 15 Mar, arriving in London Heathrow.Price includes taxes and charges.From $1,263, select.

Find the cheapest month to fly from London Heathrow to Chicago

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London Heathrow to Chicago flights are currently cheapest in April.

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Direct flights from London Heathrow to Chicago

Alternative London Heathrow to Chicago routes

Looking for the cheapest, fastest or easiest route from London Heathrow to Chicago? You could fly into the following airports instead.

London to Chicago: Flight information

The things to know before you go.

Cheapest flight found	$784
Cheapest month to fly	February
Average flight time	9 hrs
Most popular airline	American Airlines
Average flights per week	462

Finding cheap flights from London Heathrow to Chicago: Frequently asked questions

How many airports are there in Chicago?

There are 4 airports in Chicago: Chicago Midway, Chicago O'Hare International, Chicago Dupage County, and Chicago Rockford.

How much are return flights from London Heathrow to Chicago?

The best price we found for a return flight from London Heathrow to Chicago is $1,103. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from London Heathrow to Chicago?

9 hours is the average flight time from London Heathrow to Chicago.

Which airlines fly direct from London Heathrow to Chicago?

American Airlines, Alaska Airlines and British Airways fly direct from London Heathrow to Chicago.

How many flights are there a week from London Heathrow to Chicago?

As of April 2026, there are 380 flights per week flying from London Heathrow to Chicago.

When is the cheapest time to fly from London Heathrow to Chicago?

The cheapest month to fly from London Heathrow to Chicago is usually January.

Which is the cheapest airport to fly into in Chicago?

If you're flying from London Heathrow Airport, the cheapest airport near Chicago is Chicago O'Hare International – which is 25.4 km away from the centre of Chicago. We've found flights into this airport from $1,103.

Which upcoming date is cheapest to fly from London Heathrow Airport to Chicago on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to Chicago on Friday, 8 January 2027.

Can I get a direct flight from London Heathrow Airport to Chicago?

Yes – the average flight time is 9 hours.

How can I get the best flight deal from London Heathrow Airport to Chicago?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Chicago but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Chicago?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Chicago is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in Chicago?

In April, the average temperature is usually around 8°C. July is typically the warmest month in Chicago, when it usually averages around 26°C. You can expect the least rain in January. The coldest month is January, with temperatures averaging -8°C. The rainiest month is August.

Which is the cheapest airline to fly from London Heathrow Airport to Chicago with?

Currently, Icelandair and Austrian Airlines offer the cheapest flight tickets to Chicago.

Travelling from London Heathrow Airport (LHR) to Chicago: what you need to know

Book a direct flight from London Heathrow Airport to Chicago and you'll be in the air for around 8 hours.
London Heathrow Airport is located in London. Based in the UTC-6 timezone, Chicago is six hours behind London.
The busiest route is from London Heathrow Airport (LHR) to Chicago O'Hare International Airport (ORD). Choose from 57 weekly services between these two airports. If you want to get on your way as soon as you can, the earliest flight from LHR to ORD is the 08:30 United Airlines option. If you're planning to fly out later on, the final departure is at 15:45 with British Airways.
To avoid missing your LHR to Chicago flight, allow plenty of time for things like check-in and baggage drop. Arriving two hours ahead of international departures and one hour before domestic flights is the general travel rule.
You can expect longer queues during popular months such as July. Arriving up to four hours ahead of international flights and two hours for domestic departures will help ensure a smooth travel experience.
Start your trip at LHR and travel straight to Chicago O'Hare International Airport (ORD). That's where you can expect to touch down when searching for London Heathrow Airport to Chicago tickets.
You'll find a good selection of carriers that operate direct flights from London Heathrow Airport to Chicago, including:
Think about adding a stopover to potentially score a cheaper plane ticket from LHR to Chicago. Just deselect 'Direct flights only' during your search. Take a break (and maybe save some cash) by stopping at one of these connecting airports:
- Los Angeles International Airport (LAX)
- Boston Logan International Airport (BOS)
- Toronto Pearson International Airport (YYZ)
Located around 26 kilometres from central London, LHR can be reached in about 45 minutes by car. The journey on public transport will take roughly 25 minutes.
Searching for a hotel close to LHR? If you've booked an early flight from London Heathrow Airport to Chicago, these accommodation options will get you from your pillow to the plane in no time:
78% of flights that take off from London Heathrow Airport reach their destination on schedule.

How to find the cheapest flights from London Heathrow Airport (LHR) to Chicago

$784 is the cheapest price we've seen for a one-way London Heathrow Airport to Chicago flight. A return ticket right now is $1,103. Depending on the availability and when you book, these fares can change.
To find cheap flights from LHR to Chicago, book in advance. Airlines generally offer lower prices when flights first go on sale.
If you have flexibility with your trip dates, check out the 'Whole month' search tool. It'll show you the lowest price across each month when looking for a London Heathrow Airport to Chicago ticket.
Picking up a cheap flight from LHR to Chicago is a breeze with Price Alerts. All you need to do is set up one of these automatic notifications and we'll get in touch when a deal gets even better.
Select your preferred arrival and departure times, number of stops and airlines with our filters. Then, sort the results for your flight from London Heathrow Airport to Chicago by 'Cheapest,' 'Fastest' or 'Best.'

Airports in Chicago

Chicago O'Hare International Airport (ORD)

Chicago O'Hare International Airport (ORD) to the centre of Chicago takes around 30 minutes by car. The centre is roughly 27 kilometres away.
It takes around 45 minutes when travelling by public transport.
The last thing you want is a lengthy journey to your hotel if you're arriving on a late flight from London Heathrow Airport to Chicago. Reserve one of these accommodation options near ORD instead:
To get the best deal, book your ride from Chicago O'Hare International Airport about four weeks ahead of your flight from LHR to Chicago.
The address for ORD is 10000 West O'Hare.

Chicago Midway International Airport (MDW)

The centre of Chicago is about 16 kilometres from Chicago Midway International Airport (MDW). Once your flight from London Heathrow Airport to Chicago has touched down and you've made your way to arrivals, expect a drive of about 25 minutes.
Travelling by public transport will take about 30 minutes.
After stepping off your LHR to Chicago flight, tuck yourself in at a hotel close to MDW. These are some comfortable options that'll help you switch to relaxation mode:
Avoid potential price surges. Reserving your ride four weeks before your arrival at MDW will help you save.
Chicago Midway International Airport is located at 5700 South Cicero.

Chicago Rockford International Airport (RFD)

Set your sights on the city centre after your flight from London Heathrow Airport to Chicago has landed. Central Chicago is around 145 kilometres from Chicago Rockford International Airport (RFD) and takes roughly 1 hour 40 minutes to reach by taxi or ride-share.
Public transport will take you there in roughly 2 hours.
Enjoy a quiet, low-key start to your break by staying at a hotel near RFD after your LHR to Chicago flight. Rest up after a long day of travel or simply take a moment to settle into a new destination at:
Booking a couple of weeks in advance of your flight from London Heathrow Airport to Chicago is always a good idea. As well as better prices, you'll likely have a better variety of makes and models to choose from at RFD.
The address for Chicago Rockford International Airport is 2 Airport Cir.

Best time to go to Chicago

It's time to choose your travel dates for your flight from London Heathrow Airport to Chicago. July is the busiest month to visit Chicago. If you want a quieter vibe, go in January.
The warmest month in Chicago is July, with temperatures ranging between 16ºC and 28ºC. Lock in your London Heathrow Airport to Chicago plane ticket then if that's the weather you find most pleasant.
January sees average temperatures of between -12ºC and 3ºC. Search for a cheap ticket from LHR to Chicago around that time if you want to travel when it's cooler.

More about Chicago

After booking your flight from London Heathrow Airport to Chicago, find a hotel that offers the right mix of comfort and location. Make one of these accommodation options your base for exploring Chicago:
There are so many things to discover in this city it can be hard to work out where to start. Art Institute of Chicago, Millennium Park and Willis Tower are popular attractions which should be on any well-planned Chicago itinerary.

Explore more of the United States

Chicago will leave a lasting impression, but there are so many other parts of the United States just waiting to be discovered. About 451 kilometres southeast of Chicago, a visit to Columbus will keep you busy. Don't miss top attractions like Franklin Park Conservatory and Botanical Gardens, Whetstone Park / Park of Roses and Ohio Theatre.
Around 257 kilometres southeast of Chicago, Indianapolis is another essential stop in the United States. Experience this destination's highlights firsthand at Lucas Oil Stadium, Eiteljorg Museum and The Children's Museum of Indianapolis.