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

Iberia, at £477, was found to be the cheapest airline from Chicago to London Heathrow Airport.Alternate airlines flying return to your destination include Scandinavian Airlines and Icelandair. Iberia 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 £205 on Icelandair. Other airlines that offer cheap prices include JetBlue from £223 and SWISS from £255 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. Sunday afternoons 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 £3,408, our data shows the cheapest flight currently is £317. When looking at the most popular route, (Chicago O'Hare Intl - London Heathrow), you can expect to pay £375 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 (70%), Iberia (68%) and American Airlines (66%).

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 18% 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 £595.

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 £617. Cheapflights users have found deals in the month of February for as cheap as £355. 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.

£202+ 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	£477
One-way from	£202
Popular in	June
Cheapest in	February
Average price	£559
Good round-trip deal	£557 or less
Good one-way deal	£393 or less

Iberia
26/2-25/3
1 total stop
18h 52m total
Chicago to London

Search Deals

1/3
2 total stops
38h 29m total
Chicago to London

Search Deals

Highest demand for flights based on searches. 19% potential increase in price (£131 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£20 potential savings vs. average return price).

Search Deals

Average for round-trip flights in January 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 January 2025.

Wed 26/217:18ORD - LHR

1 stop10h 02mIberia

Wed 26/313:50LHR - ORD

Nonstop8h 50mIberia

Deal found 21/1£477

Sat 1/219:40ORD - LHR

2 stops14h 45mScandinavian Airlines

Sun 9/221:05LHR - ORD

2 stops26h 45mScandinavian Airlines

Deal found 21/1£481

Wed 22/119:15ORD - LHR

1 stop17h 40mTAP AIR PORTUGAL

Fri 31/106:00LHR - ORD

1 stop15h 30mTAP AIR PORTUGAL

Deal found 21/1£481

Fri 4/419:30ORD - LHR

1 stop10h 25mIcelandair

Tue 8/421:25LHR - ORD

1 stop26h 55mIcelandair

Deal found 21/1£485

Wed 23/417:50ORD - LHR

Nonstop7h 30mFinnair

Thu 1/509:30LHR - ORD

1 stop14h 20mFinnair

Deal found 21/1£486

Mon 24/311:42ORD - LHR

1 stop14h 08mBritish Airways

Mon 31/320:15LHR - ORD

1 stop24h 15mBritish Airways

Deal found 21/1£508

Tue 4/305:15ORD - LHR

2 stops23h 35mMultiple Airlines

Tue 18/312:15LHR - ORD

2 stops24h 29mMultiple Airlines

Deal found 21/1£508

Wed 5/321:10ORD - LHR

Nonstop8h 05mUnited Airlines

Mon 10/313:45LHR - ORD

1 stop32h 30mUnited Airlines

Deal found 21/1£510

Tue 4/314:08MDW - LHR

1 stop10h 42mAir France

Wed 12/309:10LHR - MDW

1 stop14h 08mAir France

Deal found 21/1£510

Tue 28/111:35ORD - LHR

2 stops14h 55mAir Canada

Thu 6/206:50LHR - ORD

2 stops13h 55mAir Canada

Deal found 21/1£511

Sat 1/207:00ORD - LHR

1 stop16h 55mJetBlue

Sat 8/208:25LHR - ORD

1 stop15h 30mJetBlue

Deal found 21/1£512

Mon 24/314:30ORD - LHR

1 stop15h 05mDelta

Wed 2/408:40LHR - ORD

1 stop11h 30mDelta

Deal found 21/1£515

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 January 2025.

Wed 26/217:18ORD - LHR

1 stop10h 02mIberia

Tue 25/311:55LHR - ORD

Nonstop8h 50mIberia

Deal found 21/1£477

Sat 1/219:40ORD - LHR

2 stops14h 45mScandinavian Airlines

Sun 9/221:05LHR - ORD

2 stops26h 45mScandinavian Airlines

Deal found 21/1£481

Fri 7/218:30ORD - LHR

1 stop10h 20mIcelandair

Wed 12/220:40LHR - ORD

1 stop26h 40mIcelandair

Deal found 20/1£496

Fri 7/220:20ORD - LHR

1 stop15h 10mTAP AIR PORTUGAL

Wed 12/206:00LHR - ORD

1 stop15h 30mTAP AIR PORTUGAL

Deal found 21/1£501

Tue 4/211:35ORD - LHR

2 stops18h 15mAir Canada

Tue 18/206:50LHR - ORD

2 stops19h 05mAir Canada

Deal found 20/1£503

Tue 4/314:08MDW - LHR

1 stop10h 42mAir France

Wed 12/309:10LHR - MDW

1 stop14h 08mAir France

Deal found 19/1£503

Sun 2/217:00ORD - LHR

Nonstop7h 50mFinnair

Tue 11/215:45LHR - ORD

Nonstop9h 00mFinnair

Deal found 21/1£503

Tue 4/314:08MDW - LHR

1 stop10h 42mVirgin Atlantic

Tue 11/309:10LHR - MDW

1 stop14h 08mVirgin Atlantic

Deal found 20/1£507

Tue 11/307:20ORD - LHR

2 stops20h 10mMultiple Airlines

Tue 18/319:25LHR - ORD

1 stop24h 40mMultiple Airlines

Deal found 20/1£509

Sat 1/207:00ORD - LHR

1 stop16h 55mJetBlue

Wed 12/208:25LHR - ORD

1 stop15h 30mJetBlue

Deal found 21/1£512

Tue 4/318:30ORD - LHR

1 stop10h 40mDelta

Wed 12/306:30LHR - ORD

2 stops14h 45mDelta

Deal found 21/1£516

Mon 17/214:08MDW - LHR

1 stop10h 42mKLM

Wed 5/312:20LHR - MDW

1 stop11h 51mKLM

Deal found 21/1£521

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 January 2025.

Tue 11/218:35ORD - LHR

Nonstop7h 40mIberia

Tue 18/211:55LHR - ORD

Nonstop8h 50mIberia

Deal found 21/1£478

Tue 4/317:00ORD - LHR

Nonstop7h 50mBritish Airways

Wed 12/315:45LHR - ORD

Nonstop9h 00mBritish Airways

Deal found 19/1£486

Sun 2/217:00ORD - LHR

Nonstop7h 50mFinnair

Tue 11/215:45LHR - ORD

Nonstop9h 00mFinnair

Deal found 21/1£503

Wed 5/321:10ORD - LHR

Nonstop8h 05mUnited Airlines

Wed 12/313:35LHR - ORD

Nonstop9h 25mUnited Airlines

Deal found 21/1£538

Fri 7/321:10ORD - LHR

Nonstop8h 05mLufthansa

Fri 14/310:25LHR - ORD

Nonstop9h 25mLufthansa

Deal found 20/1£634

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

Wed 22/119:15ORD - LHR

1 stop17h 40mTAP AIR PORTUGAL

Fri 31/106:00LHR - ORD

1 stop15h 30mTAP AIR PORTUGAL

Deal found 21/1£481

Sun 26/120:25ORD - LHR

1 stop15h 05mTAP AIR PORTUGAL

Fri 31/106:00LHR - ORD

1 stop15h 30mTAP AIR PORTUGAL

Deal found 21/1£488

Sun 26/107:00ORD - LHR

1 stop16h 55mJetBlue

Tue 4/208:25LHR - ORD

1 stop15h 30mJetBlue

Deal found 20/1£505

Mon 27/117:20ORD - LHR

1 stop10h 00mIberia

Tue 4/211:55LHR - ORD

Nonstop8h 50mIberia

Deal found 20/1£489

Mon 27/118:30ORD - LHR

1 stop19h 00mIcelandair

Fri 31/120:40LHR - ORD

1 stop26h 40mIcelandair

Deal found 21/1£497

Mon 27/117:00ORD - LHR

Nonstop7h 50mFinnair

Tue 4/211:00LHR - ORD

Nonstop8h 55mFinnair

Deal found 20/1£501

Mon 27/114:08MDW - LHR

1 stop10h 42mVirgin Atlantic

Tue 4/212:20LHR - MDW

1 stop11h 51mVirgin Atlantic

Deal found 20/1£504

Mon 27/117:00ORD - LHR

Nonstop7h 50mAmerican Airlines

Tue 4/211:00LHR - ORD

Nonstop8h 55mAmerican Airlines

Deal found 20/1£514

Mon 27/112:44MDW - LHR

1 stop13h 11mAir France

Tue 4/212:20LHR - MDW

1 stop11h 51mAir France

Deal found 20/1£519

Tue 28/108:00ORD - LHR

3 stops27h 30mMultiple Airlines

Tue 11/208:15LHR - ORD

2 stops32h 50mMultiple Airlines

Deal found 19/1£508

Tue 28/114:03ORD - LHR

1 stop10h 22mDelta

Tue 4/208:40LHR - ORD

2 stops18h 06mDelta

Deal found 21/1£516

Tue 28/117:07MDW - LHR

1 stop12h 33mDelta

Tue 18/208:40LHR - MDW

2 stops15h 31mDelta

Deal found 21/1£516

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 January 2025.

Sat 1/316:21ORD - LHR

2 stops38h 29mMultiple Airlines

Deal found 20/1£202

Sun 23/218:30ORD - LHR

1 stop10h 20mIcelandair

Deal found 20/1£205

Sat 15/220:44MDW - LHR

2 stops58h 06mMultiple Airlines

Deal found 20/1£209

Wed 12/207:00ORD - LHR

1 stop16h 55mJetBlue

Deal found 21/1£223

Tue 18/219:05ORD - LHR

1 stop11h 55mSWISS

Deal found 19/1£255

Mon 24/316:45ORD - LHR

1 stop15h 05mWestJet

Deal found 20/1£268

Sun 20/416:00ORD - LHR

1 stop16h 40mLufthansa

Deal found 20/1£273

Sun 23/220:25ORD - LHR

1 stop19h 10mTAP AIR PORTUGAL

Deal found 21/1£284

Tue 1/419:15ORD - LHR

2 stops15h 10mScandinavian Airlines

Deal found 20/1£294

Mon 24/320:40ORD - LHR

1 stop9h 45mAer Lingus

Deal found 21/1£295

Sat 1/316:00ORD - LHR

1 stop32h 30mAir Canada

Deal found 20/1£304

Wed 23/417:50ORD - LHR

Nonstop7h 30mIberia

Deal found 20/1£315

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

Wed 26/2

17:18-09:20

1 stop10h 02m

London Heathrow

Tue 25/3

11:55-15:45

Nonstop8h 50m

£477

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 1/2

19:40-16:25

2 stops14h 45m

London Heathrow

Sun 9/2

21:05-17:50

2 stops26h 45m

£481

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 7/2

18:30-10:50

1 stop10h 20m

London Heathrow

Wed 12/2

20:40-17:20

1 stop26h 40m

£496

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 7/2

20:20-17:30

1 stop15h 10m

London Heathrow

Wed 12/2

06:00-15:30

1 stop15h 30m

£501

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 4/2

11:35-11:50

2 stops18h 15m

London Heathrow

Tue 18/2

06:50-19:55

2 stops19h 05m

£503

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Tue 4/3

14:08-06:50

1 stop10h 42m

London Heathrow

Wed 12/3

09:10-18:18

1 stop14h 08m

£503

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 2/2

17:00-06:50

Nonstop7h 50m

London Heathrow

Tue 11/2

15:45-18:45

Nonstop9h 00m

£503

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Tue 4/3

14:08-06:50

1 stop10h 42m

London Heathrow

Tue 11/3

09:10-18:18

1 stop14h 08m

£507

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 11/3

07:20-08:30

2 stops20h 10m

London Heathrow

Tue 18/3

19:25-15:05

1 stop24h 40m

£509

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 1/2

07:00-05:55

1 stop16h 55m

London Heathrow

Fri 7/2

08:25-17:55

1 stop15h 30m

£512

Flights are sorted by cheapest return flights first.

Deals found on 20/1

Showing 1-10 of 42 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 £161). 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 (38 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (26 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 TAP AIR PORTUGAL, SWISS and Icelandair 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

8,521 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

8,521 reviews

Delta

8.0

Very Good

8,521 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

1,341 reviews

Delta

8.0

Very Good

8,521 reviews

Check prices

Reviews

1 / 10

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

Finnair

7.6

Good

1,286 reviews

Delta

8.0

Very Good

8,521 reviews

Check prices

Reviews

1 / 10

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

Austrian Airlines

7.6

Good

786 reviews

Delta

8.0

Very Good

8,521 reviews

Check prices

Reviews

1 / 10

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

SWISS

7.5

Good

1,600 reviews

Delta

8.0

Very Good

8,521 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?
Iberia, at £477, was found to be the cheapest airline from Chicago to London Heathrow Airport.Alternate airlines flying return to your destination include Scandinavian Airlines and Icelandair. Iberia 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 £205 on Icelandair. Other airlines that offer cheap prices include JetBlue from £223 and SWISS from £255 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 (70%), Iberia (68%) and American Airlines (66%).
What are the cheapest flights from Chicago to London Heathrow Airport?
While on average a flight from Chicago to London Heathrow Airport is generally £3,408, our data shows the cheapest flight currently is £317. When looking at the most popular route, (Chicago O'Hare Intl - London Heathrow), you can expect to pay £375 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 £161). 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

Gatwick

Croydon

Milton Keynes

Slough

Luton

Ilford

Hayes

Eastbourne

Northampton

Swindon

Maidstone

Crawley

Winchester

Southend-on-Sea

Wembley

Ipswich

Watford

Southall

Browse thousands of different options on Cheapflights for your next trip

Top 7 airlines flying from Chicago to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest£331	Average£881	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Finnair	Cheapest£388	Average£754	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£417	Average£817	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Aer Lingus	Cheapest£483	Average£705	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
British Airways	Cheapest£507	Average£707	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Iberia	Cheapest£536	Average£718	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
United Airlines	Cheapest£541	Average£718	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 £202

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 1/3. 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

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 January 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 January 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 17 January 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 January 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 January 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 TAP AIR PORTUGAL, SWISS and Icelandair 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?

Travelling to a place near Chicago?

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Alternative routes for Chicago to Heathrow

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

Top 7 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 January 2025.