Q: How much does it cost for a return flight from Chicago to London Heathrow Airport?

Airfare is below average for this route at the moment. Chicago to London Heathrow Airport flights typically cost between £467 and £577 in November. The cheapest return flight price found within the last 3 days was £372 on Scandinavian Airlines (27 Nov-2 Dec).

Question 1

What’s the cheapest stopover airport for flights from Chicago to London Heathrow Airport?

Accepted Answer

Copenhagen (CPH) is the most affordable one-stop option, with an average return flight price of £376.

Question 2

What’s the top stopover airport for flights from Chicago to London Heathrow Airport?

Accepted Answer

Reykjavik (KEF) – chosen by Cheapflights users on 29% of one-stop itineraries from Chicago to London Heathrow Airport on Cheapflights.

Question 3

How much does it cost for a return flight from Chicago to London Heathrow Airport?

Accepted Answer

Airfare is below average for this route at the moment.Chicago to London Heathrow Airport flights typically cost between £467 and £577 in November.
The cheapest return flight price found within the last 3 days was £372 on Scandinavian Airlines (27 Nov-2 Dec).

Question 4

What’s the fastest stopover option from Chicago to London Heathrow Airport?

Accepted Answer

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 10h 10m.

Question 5

Which airport typically offers the quickest stopover for flights from Chicago to London Heathrow Airport?

Accepted Answer

Flights via Helsinki (HEL) offer the fastest connection on this route, with an average stopover time of 1h 28m.

Question 6

How long is the flight from Chicago to London Heathrow Airport?

Accepted Answer

There are many flights that can get you from Chicago to London Heathrow Airport in 10h 30m. Fly via Icelandair, Delta, or Virgin Atlantic to get the fastest option. The distance from Chicago to London Heathrow Airport is about 3939 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

Question 7

What are the cheapest airlines flying from Chicago to London Heathrow Airport round-trip?

Accepted Answer

Lufthansa, at £356, was found to be the cheapest airline from Chicago to London Heathrow Airport.Alternate airlines flying return to your destination include Finnair and Iberia. Lufthansa is priced at 39% lower than the current average price of a flight leaving 3 months from now.

Question 8

How far ahead should I book a flight from Chicago to London Heathrow Airport?

Accepted Answer

Booking 81 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Question 9

What is the cheapest month to book a flight from Chicago to London Heathrow Airport?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Chicago to London Heathrow Airport (average of £112). Flying from Chicago to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 10

What is the cheapest day to fly from Chicago to London Heathrow Airport?

Accepted Answer

Travellers seeking maximum savings on their Chicago to London Heathrow Airport flight should consider departing on Thursday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Question 11

Weekly flight availability from Chicago to London Heathrow Airport

Accepted Answer

The most flights from CHI to LHR are scheduled on a Wednesday (57 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (36 on average).

Question 12

E

Accepted Answer

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Question 13

E

Accepted Answer

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Question 14

What are the cheapest flights from Chicago to London Heathrow Airport?

Accepted Answer

While on average a flight from Chicago to London Heathrow Airport is generally £399, our data shows the cheapest flight currently is £273. When looking at the most popular route, (Chicago O'Hare Intl - London Heathrow), you can expect to pay £285 for that flight.

Question 15

What are the most reliable airlines from Chicago to London Heathrow Airport?

Accepted Answer

The top 3 most reliable airlines when flying from Chicago to London Heathrow Airport are Air Canada (63%), Austrian Airlines (63%) and United Airlines (63%).

Question 16

What are the most popular airlines that fly from Chicago to London Heathrow Airport?

Accepted Answer

The most popular airlines flying from Chicago to London Heathrow Airport are American Airlines, Finnair and British Airways. Something to consider prior to booking your flight.

Question 17

What is the cheapest day to fly round-trip from Chicago to London Heathrow Airport?

Accepted Answer

Friday flights are found to be more expensive to fly from Chicago to London Heathrow Airport. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London Heathrow Airport.

Question 18

How far in advance should I book a flight from Chicago to London Heathrow Airport?

Accepted Answer

Find a great deal and save up to 11% by booking at least 60 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Chicago to London Heathrow Airport within the next two weeks, with the cheapest ticket starting at £510.

Question 19

What is the cheapest month to fly from Chicago to London Heathrow Airport?

Accepted Answer

February can be a great time to fly to London Heathrow Airport from Chicago with a flight ticket averaging about £563. Cheapflights users have found deals in the month of February for as cheap as £343. The most expensive prices can be found in the month of June.

Question 20

What is the cheapest time of day to fly from CHI to LHR?

Accepted Answer

It’s typically best to fly out from Chicago to London Heathrow Airport in the morning. Doing so could potentially save you 14% on the flight price compared to flying in the evening, which is usually more expensive.

Question 21

Can I find deals for flights from Chicago to Heathrow that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Chicago to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 22

How can I find direct flights from Chicago to Heathrow?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Heathrow.

Question 23

Can I find deals for business class flights from Chicago to Heathrow?

Accepted Answer

Yes. Cheapflights offers flight deals from Chicago to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 24

How does Cheapflights help users find flights from Chicago to Heathrow?

Accepted Answer

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Heathrow from Chicago today with Cheapflights!

Question 25

Why should you use Cheapflights to find cheap flight tickets from Chicago to Heathrow?

Accepted Answer

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Chicago to Heathrow for you. Better yet — we are completely free to use.

Question 26

Can Cheapflights find flights from Chicago to Heathrow with no change fees?

Accepted Answer

Certainly. Search results for flights to Heathrow from Chicago shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Question 27

Can Cheapflights notify me if prices for flights from Chicago to Heathrow become cheaper?

Accepted Answer

Yes! Start tracking prices for Chicago to Heathrow flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

Round-trip from	£372
One-way from	£175
Popular in	June
Cheapest in	February
Average price	£580
Good round-trip deal	£380 or less
Good one-way deal	£295 or less

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest£356	Average£546	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Finnair	Cheapest£411	Average£598	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Iberia	Cheapest£444	Average£562	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Aer Lingus	Cheapest£447	Average£577	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
British Airways	Cheapest£457	Average£618	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£459	Average£691	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
American Airlines	Cheapest£497	Average£625	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

Cheap flights from Chicago to London Heathrow Airport from £175

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Chicago to London Heathrow are usually found in February or April, booked 81 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from Chicago to Heathrow

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Find flight deals from Chicago to Heathrow

Cheapest flights from Chicago to HeathrowExplore the most affordable flight options available from Chicago to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2025.

Explore the most affordable flight options available from Chicago to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2025.

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Use the filters below to find and compare flights from Chicago to London Heathrow Airport that are best for you.

Best time to book a flight from Chicago to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Chicago with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Chicago to London Heathrow Airport

How far ahead should I book a flight from Chicago to London Heathrow Airport?

Use this chart to determine the optimal time to book a return flight from Chicago to Heathrow. Price data was last updated on 22 August 2025.

What is the cheapest month to book a flight from Chicago to London Heathrow Airport?

What is the cheapest time of day to fly from CHI to LHR?

Find hourly flight availability from Chicago to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 August 2025.

Weekly flight availability from Chicago to London Heathrow Airport

Explore weekly flight availability from Chicago to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 29 August 2025.

How much does it cost for a return flight from Chicago to London Heathrow Airport?

What’s the top stopover airport for flights from Chicago to London Heathrow Airport?

Share of one-stop return flights from Chicago to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.

What’s the cheapest stopover airport for flights from Chicago to London Heathrow Airport?

Average return fare for one-stop flights from Chicago to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

What’s the fastest stopover option from Chicago to London Heathrow Airport?

Shortest average travel time for one-stop one-way flights from Chicago to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Which airport typically offers the quickest stopover for flights from Chicago to London Heathrow Airport?

Average stopover duration for one-stop one-way flights from Chicago to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Iberia and British Airways from Chicago to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from Chicago to London Heathrow Airport?

What are the cheapest airlines flying from Chicago to London Heathrow Airport round-trip?

What are the most reliable airlines from Chicago to London Heathrow Airport?

What are the cheapest flights from Chicago to London Heathrow Airport?

Can I find deals for flights from Chicago to Heathrow that include hotel bookings?

How can I find direct flights from Chicago to Heathrow?

Can I find deals for business class flights from Chicago to Heathrow?

What is the cheapest month to book a flight from Chicago to London Heathrow Airport?

Travelling to a place near London Heathrow Airport?

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Alternative routes for Chicago to Heathrow

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Top 7 airlines flying from Chicago to Heathrow

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How does Cheapflights help users find flights from Chicago to Heathrow?

Why should you use Cheapflights to find cheap flight tickets from Chicago to Heathrow?

Can Cheapflights find flights from Chicago to Heathrow with no change fees?

Can Cheapflights notify me if prices for flights from Chicago to Heathrow become cheaper?

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Cheapest flights from Chicago to Heathrow
Explore the most affordable flight options available from Chicago to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2025.