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

Icelandair, at £473, was found to be the cheapest airline from Chicago to London Heathrow Airport.Alternate airlines flying return to your destination include Scandinavian Airlines and TAP AIR PORTUGAL. Icelandair is priced at 25% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Chicago to London Heathrow Airport one-way?

One-way options have recently been found by users for as low as £181 on Icelandair. Other airlines that offer cheap prices include JetBlue from £200 and WestJet from £230 one-way.

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

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

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

While on average a flight from Chicago to London Heathrow Airport is generally £3,283, our data shows the cheapest flight currently is £296. When looking at the most popular route, (Chicago O'Hare Intl - London Heathrow), you can expect to pay £383 for that flight.

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

The top 3 most reliable airlines when flying from Chicago to London Heathrow Airport are Lufthansa (82%), Air Canada (77%) and Austrian Airlines (77%).

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

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.

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

Saturday 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.

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

Find a great deal and save up to 8% 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 £577.

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

February can be a great time to fly to London Heathrow Airport from Chicago with a flight ticket averaging about £601. Cheapflights users have found deals in the month of February for as cheap as £352. The most expensive prices can be found in the month of June.

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

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

How can I find direct flights from Chicago to Heathrow?

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

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

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.

£177+ Flights from Chicago to London Heathrow Airport

The best prices from Chicago to London Heathrow are usually found in February or September, booked 56 days in advance, depart on a Thursday or Monday and return on a Wednesday

Cheap flight deals from Chicago to Heathrow

Round-trip from	£473
One-way from	£177
Popular in	June
Cheapest in	February
Average price	£752

Icelandair
12/1-21/1
2 total stops
21h 25m total
Chicago to London

Search Deals

28/1
2 total stops
18h 23m total
Chicago to London

Search Deals

High demand for flights, 19% potential price rise

Search Deals

Best time to find cheap flights, 3% potential price drop

Search Deals

Average for round-trip flights in December 2024

Search Deals

Find flight deals from Chicago to Heathrow

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 20 December 2024.

Sun 29/1219:10ORD - LHR

1 stop14h 50mScandinavian Airlines

Sun 12/119:30LHR - ORD

1 stop26h 20mScandinavian Airlines

Deal found 19/12£504

Mon 30/1221:05ORD - LHR

1 stop27h 35mUnited Airlines

Thu 9/111:10LHR - ORD

1 stop32h 01mUnited Airlines

Deal found 19/12£524

Tue 31/1218:39ORD - LHR

1 stop11h 21mBritish Airways

Thu 9/111:25LHR - ORD

1 stop32h 36mBritish Airways

Deal found 19/12£565

Tue 31/1210:08MDW - LHR

1 stop15h 47mDelta

Mon 13/108:40LHR - MDW

2 stops15h 34mDelta

Deal found 18/12£565

Tue 31/1215:32MDW - LHR

1 stop13h 03mAir France

Mon 13/112:20LHR - MDW

1 stop11h 54mAir France

Deal found 18/12£576

Mon 30/1222:00ORD - LHR

Nonstop7h 40mAmerican Airlines

Thu 9/108:40LHR - ORD

1 stop14h 12mAmerican Airlines

Deal found 19/12£580

Sun 29/1218:25ORD - LHR

Nonstop7h 50mIberia

Fri 10/108:40LHR - ORD

1 stop17h 10mIberia

Deal found 19/12£609

Tue 31/1221:10ORD - LHR

Nonstop8h 05mAustrian Airlines

Thu 9/110:25LHR - ORD

Nonstop9h 25mAustrian Airlines

Deal found 19/12£680

Tue 24/1208:45ORD - LHR

1 stop15h 10mJetBlue

Fri 17/107:25LHR - ORD

1 stop14h 19mJetBlue

Deal found 19/12£701

Tue 24/1220:25ORD - LHR

1 stop28h 05mMultiple Airlines

Wed 29/106:00LHR - ORD

1 stop14h 05mMultiple Airlines

Deal found 18/12£702

Sun 29/1218:25ORD - LHR

Nonstop7h 50mFinnair

Sun 12/111:55LHR - ORD

Nonstop8h 50mFinnair

Deal found 19/12£716

Tue 31/1219:05ORD - LHR

2 stops15h 35mSWISS

Thu 9/120:05LHR - ORD

2 stops23h 35mSWISS

Deal found 19/12£718

Best flights from Chicago to Heathrow
Discover carefully curated flight deals from Chicago to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 December 2024.

Sun 12/118:30ORD - LHR

1 stop10h 20mIcelandair

Tue 21/112:15LHR - ORD

1 stop11h 05mIcelandair

Deal found 19/12£473

Thu 27/320:40ORD - LHR

1 stop14h 20mScandinavian Airlines

Wed 2/418:40LHR - ORD

1 stop27h 30mScandinavian Airlines

Deal found 19/12£474

Sun 19/120:25ORD - LHR

2 stops18h 35mMultiple Airlines

Tue 21/109:50LHR - ORD

2 stops35h 40mMultiple Airlines

Deal found 19/12£488

Fri 10/120:20ORD - LHR

1 stop15h 10mTAP AIR PORTUGAL

Wed 22/106:00LHR - ORD

1 stop15h 30mTAP AIR PORTUGAL

Deal found 19/12£490

Wed 15/117:00ORD - LHR

Nonstop7h 50mBritish Airways

Wed 29/115:45LHR - ORD

Nonstop9h 00mBritish Airways

Deal found 19/12£501

Wed 23/420:30ORD - LHR

Nonstop7h 50mFinnair

Fri 2/509:30LHR - ORD

1 stop14h 20mFinnair

Deal found 19/12£503

Sun 2/217:05ORD - LHR

1 stop10h 25mJetBlue

Sun 9/208:25LHR - ORD

1 stop15h 30mJetBlue

Deal found 19/12£506

Wed 5/318:26ORD - LHR

Nonstop7h 49mIberia

Wed 12/314:10LHR - ORD

Nonstop8h 50mIberia

Deal found 19/12£511

Sun 12/114:08MDW - LHR

1 stop10h 42mVirgin Atlantic

Tue 21/112:20LHR - MDW

1 stop11h 54mVirgin Atlantic

Deal found 20/12£514

Sun 12/117:50ORD - LHR

Nonstop8h 05mUnited Airlines

Tue 21/108:30LHR - ORD

1 stop12h 45mUnited Airlines

Deal found 20/12£515

Wed 8/114:05ORD - LHR

1 stop10h 25mAir Canada

Tue 28/108:55LHR - ORD

2 stops15h 55mAir Canada

Deal found 18/12£521

Sun 12/114:03ORD - LHR

1 stop12h 42mDelta

Tue 21/108:40LHR - ORD

2 stops15h 45mDelta

Deal found 18/12£532

Direct flights from Chicago to Heathrow
Explore direct flight options from Chicago to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 20 December 2024.

Wed 15/117:00ORD - LHR

Nonstop7h 50mBritish Airways

Wed 29/115:45LHR - ORD

Nonstop9h 00mBritish Airways

Deal found 19/12£501

Wed 5/318:26ORD - LHR

Nonstop7h 49mIberia

Wed 12/314:10LHR - ORD

Nonstop8h 50mIberia

Deal found 19/12£511

Sun 12/117:00ORD - LHR

Nonstop7h 50mFinnair

Tue 21/111:00LHR - ORD

Nonstop8h 55mFinnair

Deal found 19/12£514

Sun 12/121:10ORD - LHR

Nonstop8h 05mUnited Airlines

Tue 21/113:35LHR - ORD

Nonstop9h 25mUnited Airlines

Deal found 18/12£529

Sun 12/121:10ORD - LHR

Nonstop8h 05mAir Canada

Tue 21/110:25LHR - ORD

Nonstop9h 25mAir Canada

Deal found 20/12£534

Sun 12/121:10ORD - LHR

Nonstop8h 05mAustrian Airlines

Tue 21/110:25LHR - ORD

Nonstop9h 25mAustrian Airlines

Deal found 18/12£670

Tue 8/416:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Tue 15/414:10LHR - ORD

Nonstop9h 10mMultiple Airlines

Deal found 19/12£693

Last-minute flights from Chicago to Heathrow
Discover last-minute flight deals from Chicago to Heathrow. Data last updated 20 December 2024 and is based on user searches.

Thu 26/1209:50ORD - LHR

2 stops15h 20mAir Canada

Thu 9/111:10LHR - ORD

1 stop17h 03mAir Canada

Deal found 19/12£781

Fri 27/1208:42ORD - LHR

1 stop15h 13mJetBlue

Sat 18/108:25LHR - ORD

1 stop15h 34mJetBlue

Deal found 20/12£740

Sat 28/1220:35ORD - LHR

1 stop33h 30mBritish Airways

Fri 10/118:00LHR - ORD

1 stop22h 47mBritish Airways

Deal found 18/12£566

Sun 29/1219:10ORD - LHR

1 stop14h 50mScandinavian Airlines

Sun 12/119:30LHR - ORD

1 stop26h 20mScandinavian Airlines

Deal found 19/12£504

Sun 29/1218:25ORD - LHR

Nonstop7h 50mIberia

Fri 10/108:40LHR - ORD

1 stop17h 10mIberia

Deal found 19/12£609

Sun 29/1218:25ORD - LHR

Nonstop7h 50mFinnair

Sun 12/111:55LHR - ORD

Nonstop8h 50mFinnair

Deal found 19/12£716

Sun 29/1209:30MDW - LHR

1 stop15h 20mVirgin Atlantic

Sat 11/106:30LHR - MDW

2 stops17h 17mVirgin Atlantic

Deal found 19/12£776

Mon 30/1221:05ORD - LHR

1 stop27h 35mUnited Airlines

Thu 9/111:10LHR - ORD

1 stop32h 01mUnited Airlines

Deal found 19/12£524

Mon 30/1222:00ORD - LHR

Nonstop7h 40mAmerican Airlines

Thu 9/108:40LHR - ORD

1 stop14h 12mAmerican Airlines

Deal found 19/12£580

Mon 30/1221:10ORD - LHR

Nonstop8h 05mLufthansa

Sat 11/110:25LHR - ORD

Nonstop9h 25mLufthansa

Deal found 19/12£728

Mon 30/1209:30MDW - LHR

1 stop15h 20mDelta

Thu 9/106:30LHR - MDW

2 stops17h 44mDelta

Deal found 19/12£728

Mon 30/1221:25ORD - LHR

1 stop15h 10mMultiple Airlines

Tue 7/115:00LHR - ORD

2 stops24h 01mMultiple Airlines

Deal found 20/12£748

One-way flights from Chicago to Heathrow
Search for one-way flight options from Chicago to Heathrow. Find affordable one-way fares based on user searches. Data last updated 20 December 2024.

Tue 28/114:02ORD - LHR

2 stops18h 23mMultiple Airlines

Deal found 19/12£177

Sun 19/118:30ORD - LHR

1 stop19h 00mIcelandair

Deal found 19/12£181

Sun 19/117:05ORD - LHR

1 stop10h 25mJetBlue

Deal found 19/12£200

Mon 13/107:15MDW - LHR

3 stops47h 35mMultiple Airlines

Deal found 19/12£205

Thu 20/316:45ORD - LHR

1 stop15h 05mWestJet

Deal found 20/12£230

Sun 16/220:25ORD - LHR

1 stop19h 10mTAP AIR PORTUGAL

Deal found 19/12£266

Sun 23/320:40ORD - LHR

1 stop20h 00mScandinavian Airlines

Deal found 20/12£288

Sun 19/121:45ORD - LHR

Nonstop7h 45mIberia

Deal found 19/12£317

Sun 30/319:15ORD - LHR

Nonstop7h 55mBritish Airways

Deal found 19/12£319

Sun 19/109:34MDW - LHR

1 stop15h 16mVirgin Atlantic

Deal found 19/12£322

Tue 14/117:50ORD - LHR

Nonstop8h 05mUnited Airlines

Deal found 19/12£323

Tue 14/117:07MDW - LHR

1 stop11h 28mKLM

Deal found 19/12£323

Find flights from Chicago to Heathrow within your budget

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 12/1

18:30-10:50

1 stop10h 20m

London Heathrow

Tue 21/1

12:15-17:20

1 stop11h 05m

£473

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 27/3

20:40-16:00

1 stop14h 20m

London Heathrow

Wed 2/4

18:40-16:10

1 stop27h 30m

£474

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 19/1

20:25-21:00

2 stops18h 35m

London Heathrow

Tue 21/1

09:50-15:30

2 stops35h 40m

£488

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 10/1

20:20-17:30

1 stop15h 10m

London Heathrow

Wed 22/1

06:00-15:30

1 stop15h 30m

£490

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 15/1

17:00-06:50

Nonstop7h 50m

London Heathrow

Wed 29/1

15:45-18:45

Nonstop9h 00m

£501

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 23/4

20:30-10:20

Nonstop7h 50m

London Heathrow

Thu 1/5

07:30-17:50

1 stop16h 20m

£503

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 2/2

09:05-05:55

1 stop14h 50m

London Heathrow

Sun 9/2

07:25-15:43

1 stop14h 18m

£506

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 5/3

18:26-08:15

Nonstop7h 49m

London Heathrow

Wed 12/3

14:10-18:00

Nonstop8h 50m

£511

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Sun 12/1

14:08-06:50

1 stop10h 42m

London Heathrow

Tue 21/1

12:20-18:14

1 stop11h 54m

£514

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 12/1

17:50-07:55

Nonstop8h 05m

London Heathrow

Tue 21/1

08:30-15:15

1 stop12h 45m

£515

Flights are sorted by cheapest return flights first.

Deals found on 19/12

Showing 1-10 of 40 results

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.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Chicago to Heathrow

Get recent, data-driven insights about flights from Chicago to Heathrow including ideal travel times, pricing trends, and more.

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

Booking 56 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.

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

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 July is currently the most expensive (average of £160). 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.

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

It’s typically best to fly out from Chicago to London Heathrow Airport at midday. Doing so could potentially save you 12% on the flight price compared to flying in the evening, which is usually more expensive.

Weekly flight availability from Chicago to London Heathrow Airport

The most flights from CHI to LHR are scheduled on a Monday (40 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (40 on average).

Rainfall in Heathrow by month

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.

Temperature in Heathrow by month

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).

Reviews of airlines servicing Heathrow

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

Delta

8.0

Very Good

8,601 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

8,601 reviews

Delta

8.0

Very Good

8,601 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,349 reviews

Delta

8.0

Very Good

8,601 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.7

Good

1,285 reviews

Delta

8.0

Very Good

8,601 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

LOT

7.6

Good

1,128 reviews

Delta

8.0

Very Good

8,601 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS

7.6

Good

1,603 reviews

Delta

8.0

Very Good

8,601 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines flying from Chicago to London Heathrow Airport round-trip?
Icelandair, at £473, was found to be the cheapest airline from Chicago to London Heathrow Airport.Alternate airlines flying return to your destination include Scandinavian Airlines and TAP AIR PORTUGAL. Icelandair is priced at 25% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Chicago to London Heathrow Airport one-way?
One-way options have recently been found by users for as low as £181 on Icelandair. Other airlines that offer cheap prices include JetBlue from £200 and WestJet from £230 one-way.
What are the most reliable airlines from Chicago to London Heathrow Airport?
The top 3 most reliable airlines when flying from Chicago to London Heathrow Airport are Lufthansa (82%), Air Canada (77%) and Austrian Airlines (77%).
What are the cheapest flights from Chicago to London Heathrow Airport?
While on average a flight from Chicago to London Heathrow Airport is generally £3,283, our data shows the cheapest flight currently is £296. When looking at the most popular route, (Chicago O'Hare Intl - London Heathrow), you can expect to pay £383 for that flight.
Can I find deals for flights from Chicago to Heathrow that include hotel bookings?
Yes. In addition to deals on Chicago to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Chicago to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Heathrow.
Can I find deals for business class flights from Chicago to Heathrow?
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.
What is the cheapest month to book a flight from Chicago to London Heathrow Airport?
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 July is currently the most expensive (average of £160). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 8 airlines flying from Chicago to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest£324	Average£862	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Scandinavian Airlines	Cheapest£346	Average£407	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
American Airlines	Cheapest£408	Average£799	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Finnair	Cheapest£458	Average£737	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Aer Lingus	Cheapest£473	Average£684	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
British Airways	Cheapest£496	Average£684	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Iberia	Cheapest£524	Average£692	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
United Airlines	Cheapest£538	Average£702	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Fly with Cheapflights

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

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!

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

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.

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

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.

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

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.

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Cheap flights from Chicago to London Heathrow Airport from £177

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 28/1. Fares are subject to change and may not be available on all flights or dates of travel.

The best prices from Chicago to London Heathrow are usually found in February or September, booked 56 days in advance, depart on a Thursday or Monday and return on a Wednesday

Cheap flight deals from Chicago to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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 20 December 2024.

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 20 December 2024.

Find flights from Chicago to Heathrow within your budget

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.

Travel insights for flights from Chicago to Heathrow

Get recent, data-driven insights about flights from Chicago to Heathrow including ideal travel times, pricing trends, and more.

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 13 December 2024.

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 20 December 2024.

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 20 December 2024.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Scandinavian Airlines, British Airways and Finnair from Chicago to London 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.

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

What are the cheapest airlines to fly from Chicago to London Heathrow Airport one-way?

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?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Chicago to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Top 8 airlines flying from Chicago to Heathrow

Fly with Cheapflights

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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 20 December 2024.