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

Finnair, at £463, was found to be the cheapest airline from Chicago to London Heathrow Airport.Alternate airlines flying return to your destination include Scandinavian Airlines and Iberia. Finnair is priced at 26% 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 £213 on JetBlue. Other airlines that offer cheap prices include Icelandair from £219 and WestJet from £278 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 Wednesday mornings 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.

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

While on average a flight from Chicago to London Heathrow Airport is generally £2,784, our data shows the cheapest flight currently is £305. 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 Aer Lingus (80%), Air Canada (74%) and Austrian Airlines (74%).

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?

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.

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

Find a great deal and save up to 13% 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 £591.

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 £602. Cheapflights users have found deals in the month of February for as cheap as £375. 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.

£211+ Flights from Chicago to London Heathrow Airport

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

Cheap flight deals from Chicago to Heathrow

Round-trip from	£463
One-way from	£211
Popular in	June
Cheapest in	January
Average price	£532
Good round-trip deal	£492 or less
Good one-way deal	£322 or less

Finnair
1/4-29/4
1 total stop
21h 25m total
Chicago to London

Search Deals

23/4
2 total stops
32h 25m total
Chicago to London

Search Deals

Highest demand for flights based on searches. 20% potential increase in price (£130 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).

Search Deals

Average for round-trip flights in February 2025

Search Deals

Price to beat on a round-trip flight from Chicago (CHI) to London Heathrow.

Search Deals

Price to beat on a one-way flight from Chicago (CHI) to London Heathrow.

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 21 February 2025.

Tue 1/416:55ORD - LHR

Nonstop7h 55mFinnair

Tue 29/410:20LHR - ORD

1 stop13h 30mFinnair

Deal found 21/2£463

Tue 25/218:30ORD - LHR

1 stop10h 20mIcelandair

Tue 4/312:15LHR - ORD

1 stop11h 05mIcelandair

Deal found 21/2£464

Sun 9/320:55ORD - LHR

2 stops15h 05mScandinavian Airlines

Sun 16/321:05LHR - ORD

2 stops26h 45mScandinavian Airlines

Deal found 21/2£465

Tue 22/417:45ORD - LHR

Nonstop7h 35mIberia

Wed 30/410:00LHR - ORD

1 stop13h 39mIberia

Deal found 21/2£466

Tue 1/420:50ORD - LHR

1 stop10h 35mAer Lingus

Tue 29/412:00LHR - ORD

1 stop13h 00mAer Lingus

Deal found 21/2£467

Sun 9/310:25ORD - LHR

1 stop15h 25mVirgin Atlantic

Tue 18/309:00LHR - ORD

1 stop12h 05mVirgin Atlantic

Deal found 19/2£479

Sun 2/320:25ORD - LHR

1 stop19h 10mTAP AIR PORTUGAL

Tue 11/318:30LHR - ORD

1 stop27h 00mTAP AIR PORTUGAL

Deal found 21/2£480

Mon 7/418:05ORD - LHR

Nonstop8h 15mUnited Airlines

Mon 14/408:40LHR - ORD

1 stop13h 15mUnited Airlines

Deal found 21/2£488

Wed 5/314:00ORD - LHR

1 stop14h 30mDelta

Mon 10/306:30LHR - ORD

1 stop14h 00mDelta

Deal found 19/2£493

Thu 3/419:09MDW - LHR

1 stop12h 01mVirgin Atlantic

Thu 24/411:20LHR - MDW

1 stop12h 39mVirgin Atlantic

Deal found 20/2£493

Tue 1/414:55MDW - LHR

1 stop12h 00mAir France

Tue 8/415:15LHR - MDW

1 stop13h 06mAir France

Deal found 20/2£497

Sun 6/418:35ORD - LHR

1 stop12h 25mSWISS

Sun 13/420:05LHR - ORD

1 stop22h 05mSWISS

Deal found 21/2£497

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 21 February 2025.

Tue 1/416:55ORD - LHR

Nonstop7h 55mFinnair

Tue 29/410:20LHR - ORD

1 stop13h 30mFinnair

Deal found 21/2£463

Sun 9/320:55ORD - LHR

2 stops15h 05mScandinavian Airlines

Sun 16/321:05LHR - ORD

2 stops26h 45mScandinavian Airlines

Deal found 21/2£465

Tue 22/417:45ORD - LHR

Nonstop7h 35mIberia

Wed 30/410:00LHR - ORD

1 stop13h 39mIberia

Deal found 21/2£466

Thu 24/419:30ORD - LHR

1 stop10h 25mIcelandair

Tue 29/413:05LHR - ORD

1 stop11h 15mIcelandair

Deal found 21/2£467

Tue 1/420:50ORD - LHR

1 stop10h 35mAer Lingus

Tue 29/412:00LHR - ORD

1 stop13h 00mAer Lingus

Deal found 21/2£467

Sun 9/310:25ORD - LHR

1 stop15h 25mVirgin Atlantic

Tue 18/309:00LHR - ORD

1 stop12h 05mVirgin Atlantic

Deal found 19/2£479

Sun 9/321:25ORD - LHR

1 stop19h 10mTAP AIR PORTUGAL

Tue 18/318:30LHR - ORD

1 stop27h 00mTAP AIR PORTUGAL

Deal found 19/2£481

Mon 7/421:20ORD - LHR

Nonstop8h 25mUnited Airlines

Mon 14/408:40LHR - ORD

1 stop13h 15mUnited Airlines

Deal found 21/2£488

Wed 5/314:00ORD - LHR

1 stop12h 45mDelta

Sun 9/306:30LHR - ORD

1 stop14h 00mDelta

Deal found 20/2£493

Tue 1/414:55MDW - LHR

1 stop12h 00mAir France

Tue 8/415:15LHR - MDW

1 stop13h 06mAir France

Deal found 20/2£497

Sun 6/418:35ORD - LHR

1 stop12h 25mSWISS

Sun 13/420:05LHR - ORD

1 stop22h 05mSWISS

Deal found 21/2£497

Fri 25/415:35ORD - LHR

1 stop12h 25mAir Canada

Wed 30/406:50LHR - ORD

2 stops14h 05mAir Canada

Deal found 20/2£498

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 21 February 2025.

Sun 9/321:15ORD - LHR

Nonstop7h 45mIberia

Tue 18/313:50LHR - ORD

Nonstop8h 50mIberia

Deal found 19/2£464

Tue 1/416:55ORD - LHR

Nonstop7h 55mFinnair

Wed 9/411:05LHR - ORD

Nonstop8h 45mFinnair

Deal found 20/2£489

Sun 6/421:20ORD - LHR

Nonstop8h 25mAir Canada

Sun 13/408:30LHR - ORD

Nonstop9h 05mAir Canada

Deal found 20/2£494

Tue 22/418:05ORD - LHR

Nonstop8h 15mUnited Airlines

Sun 27/408:30LHR - ORD

Nonstop9h 05mUnited Airlines

Deal found 20/2£499

Wed 23/421:15ORD - LHR

Nonstop7h 45mBritish Airways

Wed 30/411:05LHR - ORD

Nonstop8h 45mBritish Airways

Deal found 20/2£515

Sun 9/319:30ORD - LHR

Nonstop7h 45mMultiple Airlines

Tue 18/311:00LHR - ORD

Nonstop8h 55mMultiple Airlines

Deal found 20/2£525

Sun 9/319:30ORD - LHR

Nonstop7h 45mAmerican Airlines

Tue 18/315:45LHR - ORD

Nonstop9h 00mAmerican Airlines

Deal found 19/2£536

Mon 7/416:05ORD - LHR

Nonstop8h 15mAustrian Airlines

Mon 14/414:10LHR - ORD

Nonstop9h 05mAustrian Airlines

Deal found 20/2£673

Tue 18/322:10ORD - LHR

Nonstop8h 05mBrussels Airlines

Tue 8/411:05LHR - ORD

Nonstop9h 05mBrussels Airlines

Deal found 20/2£674

Last-minute flights from Chicago to Heathrow
Discover last-minute flight deals from Chicago to Heathrow. Data last updated 21 February 2025 and is based on user searches.

Tue 25/218:30ORD - LHR

1 stop10h 20mIcelandair

Tue 4/312:15LHR - ORD

1 stop11h 05mIcelandair

Deal found 21/2£464

Wed 26/221:00ORD - LHR

1 stop10h 25mAer Lingus

Wed 5/308:50LHR - ORD

1 stop11h 10mAer Lingus

Deal found 20/2£495

Wed 26/218:26ORD - LHR

Nonstop7h 49mBritish Airways

Tue 25/315:45LHR - ORD

Nonstop9h 00mBritish Airways

Deal found 19/2£502

Wed 26/211:35ORD - LHR

2 stops18h 15mAir Canada

Tue 25/306:50LHR - ORD

2 stops18h 05mAir Canada

Deal found 19/2£507

Wed 26/221:10ORD - LHR

Nonstop8h 05mUnited Airlines

Tue 25/308:55LHR - ORD

1 stop13h 20mUnited Airlines

Deal found 20/2£517

Wed 26/212:15ORD - LHR

1 stop12h 50mDelta

Fri 7/308:40LHR - ORD

1 stop11h 50mDelta

Deal found 20/2£518

Wed 26/220:25ORD - LHR

Nonstop7h 35mFinnair

Tue 25/313:50LHR - ORD

Nonstop8h 50mFinnair

Deal found 20/2£523

Wed 26/210:57MDW - LHR

1 stop13h 23mDelta

Thu 6/308:40LHR - MDW

2 stops15h 03mDelta

Deal found 20/2£526

Thu 27/211:44ORD - LHR

1 stop15h 46mJetBlue

Mon 3/308:25LHR - ORD

1 stop14h 35mJetBlue

Deal found 21/2£504

Thu 27/211:55ORD - LHR

1 stop21h 00mTurkish Airlines

Wed 5/322:35LHR - ORD

1 stop17h 35mTurkish Airlines

Deal found 21/2£517

Fri 28/219:40ORD - LHR

1 stop14h 20mScandinavian Airlines

Sun 2/315:35LHR - ORD

2 stops32h 15mScandinavian Airlines

Deal found 20/2£474

Sun 2/320:25ORD - LHR

1 stop19h 10mTAP AIR PORTUGAL

Tue 11/318:30LHR - ORD

1 stop27h 00mTAP AIR PORTUGAL

Deal found 21/2£480

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 21 February 2025.

Wed 23/405:55ORD - LHR

2 stops32h 25mMultiple Airlines

Deal found 21/2£211

Sun 2/311:44ORD - LHR

1 stop15h 46mJetBlue

Deal found 20/2£213

Sun 27/422:15ORD - LHR

1 stop16h 05mIcelandair

Deal found 21/2£219

Sat 1/307:00MDW - LHR

2 stops47h 50mMultiple Airlines

Deal found 19/2£250

Sun 20/416:45ORD - LHR

1 stop37h 20mWestJet

Deal found 20/2£278

Wed 5/319:15ORD - LHR

1 stop17h 40mTAP AIR PORTUGAL

Deal found 20/2£279

Sun 2/319:40ORD - LHR

2 stops17h 10mScandinavian Airlines

Deal found 20/2£287

Sun 2/317:00ORD - LHR

Nonstop7h 50mBritish Airways

Deal found 20/2£289

Mon 24/320:40ORD - LHR

1 stop9h 45mAer Lingus

Deal found 20/2£303

Sun 2/312:44MDW - LHR

1 stop11h 36mVirgin Atlantic

Deal found 20/2£315

Wed 23/416:05ORD - LHR

Nonstop8h 15mUnited Airlines

Deal found 20/2£323

Wed 2/414:55MDW - LHR

1 stop12h 00mAir France

Deal found 20/2£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

Tue 1/4

16:55-06:50

Nonstop7h 55m

London Heathrow

Tue 29/4

10:20-17:50

1 stop13h 30m

£463

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/3

20:55-17:00

2 stops15h 05m

London Heathrow

Sun 16/3

21:05-18:50

2 stops26h 45m

£465

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 22/4

17:45-07:20

Nonstop7h 35m

London Heathrow

Wed 30/4

10:00-17:39

1 stop13h 39m

£466

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 24/4

19:30-11:55

1 stop10h 25m

London Heathrow

Tue 29/4

13:05-18:20

1 stop11h 15m

£467

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 1/4

20:50-13:25

1 stop10h 35m

London Heathrow

Tue 29/4

12:00-19:00

1 stop13h 00m

£467

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/3

10:25-06:50

1 stop15h 25m

London Heathrow

Tue 18/3

09:00-16:05

1 stop12h 05m

£479

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/3

21:25-21:35

1 stop19h 10m

London Heathrow

Tue 18/3

18:30-16:30

1 stop27h 00m

£481

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 7/4

18:05-08:20

Nonstop8h 15m

London Heathrow

Mon 14/4

08:40-15:55

1 stop13h 15m

£488

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 5/3

14:00-10:30

1 stop14h 30m

London Heathrow

Mon 10/3

06:30-15:30

1 stop14h 00m

£493

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Thu 3/4

19:09-13:10

1 stop12h 01m

London Heathrow

Thu 24/4

11:20-17:59

1 stop12h 39m

£493

Flights are sorted by cheapest return flights first.

Deals found on 21/2

Showing 1-10 of 39 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 August is currently the most expensive (average of £163). 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 10% 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 Wednesday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (33 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 Delta, KLM 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

8,213 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Delta

8.0

Very Good

8,213 reviews

Delta

8.0

Very Good

8,213 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

KLM

7.8

Good

1,331 reviews

Delta

8.0

Very Good

8,213 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Finnair

7.6

Good

1,273 reviews

Delta

8.0

Very Good

8,213 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

SWISS

7.5

Good

1,568 reviews

Delta

8.0

Very Good

8,213 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Virgin Atlantic

7.5

Good

654 reviews

Delta

8.0

Very Good

8,213 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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?
Finnair, at £463, was found to be the cheapest airline from Chicago to London Heathrow Airport.Alternate airlines flying return to your destination include Scandinavian Airlines and Iberia. Finnair is priced at 26% 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 £213 on JetBlue. Other airlines that offer cheap prices include Icelandair from £219 and WestJet from £278 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 Aer Lingus (80%), Air Canada (74%) and Austrian Airlines (74%).
What are the cheapest flights from Chicago to London Heathrow Airport?
While on average a flight from Chicago to London Heathrow Airport is generally £2,784, our data shows the cheapest flight currently is £305. 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 August is currently the most expensive (average of £163). 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

Deal

Hounslow

Milton Keynes

Croydon

Gatwick

Slough

Luton

Ilford

Hayes

Eastbourne

Swindon

Northampton

Wembley

Southend-on-Sea

Ipswich

Winchester

Maidstone

Crawley

Southall

Watford

Browse thousands of different options on Cheapflights for your next trip

Top 6 airlines flying from Chicago to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest£322	Average£858	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Finnair	Cheapest£378	Average£734	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£406	Average£832	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Iberia	Cheapest£475	Average£684	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£506	Average£693	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£527	Average£746	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 £211

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 23/4. 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 January or February, booked 56 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap flight deals from Chicago to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

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 21 February 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 21 February 2025.

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 14 February 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 21 February 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 21 February 2025.

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 Delta, KLM 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?

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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?

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Alternative routes for Chicago to Heathrow

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Top 6 airlines flying from Chicago to Heathrow

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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 21 February 2025.