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Cheap flights from Chicago to London Heathrow Airport from £159

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.
CHI — LHR
25 Nov — 2 Dec1
1 adult

The best prices from Chicago to London Heathrow are usually found in February or November, booked 75 days in advance, depart on a Monday or Thursday and return on a Wednesday

Cheap flight deals from Chicago to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 20 November 2024.

Round-trip from

£470

One-way from

£159

Popular in

June

Cheapest in

February
20/1-27/1
  • 20/1-27/1
  • 2 total stops
  • 28h 45m total
  • Chicago to London
Search Deals
Icelandair
  • Icelandair
  • 28/1
  • 1 total stop
  • 19h 00m total
  • Chicago to London
Search Deals
High demand for flights, 29% potential price rise
Search Deals
Best time to find cheap flights, 20% potential price drop
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 November 2024.

Wed 4/1210:43ORD - LHR
2 stops19h 07mMultiple Airlines
Tue 10/1212:05LHR - ORD
2 stops18h 29mMultiple Airlines
Deal found 19/11£473
Sun 8/1220:25ORD - LHR
1 stop19h 10mTAP AIR PORTUGAL
Tue 10/1208:15LHR - ORD
2 stops31h 03mTAP AIR PORTUGAL
Deal found 18/11£474
Wed 4/1211:35ORD - LHR
1 stop13h 35mAir Canada
Tue 10/1206:50LHR - ORD
2 stops13h 55mAir Canada
Deal found 19/11£479
Tue 31/1218:30ORD - LHR
1 stop10h 20mIcelandair
Tue 14/112:15LHR - ORD
1 stop11h 05mIcelandair
Deal found 19/11£481
Mon 2/1211:35ORD - LHR
1 stop13h 35mUnited Airlines
Tue 10/1208:30LHR - ORD
1 stop12h 45mUnited Airlines
Deal found 18/11£489
Mon 30/1214:55ORD - LHR
1 stop11h 00mDelta
Wed 15/108:40LHR - ORD
1 stop11h 50mDelta
Deal found 19/11£496
Wed 4/1217:00ORD - LHR
Nonstop7h 50mBritish Airways
Tue 10/1215:45LHR - ORD
Nonstop9h 00mBritish Airways
Deal found 19/11£498
Wed 4/1218:35ORD - LHR
Nonstop7h 40mIberia
Thu 12/1215:45LHR - ORD
Nonstop9h 00mIberia
Deal found 19/11£500
Tue 19/1113:21ORD - LHR
2 stops18h 44mAustrian Airlines
Tue 26/1119:25LHR - ORD
1 stop24h 40mAustrian Airlines
Deal found 19/11£501
Tue 31/1222:00ORD - LHR
Nonstop7h 40mFinnair
Wed 15/111:55LHR - ORD
Nonstop8h 50mFinnair
Deal found 19/11£503
Wed 4/1210:41MDW - LHR
1 stop13h 39mDelta
Wed 11/1208:40LHR - MDW
2 stops15h 52mDelta
Deal found 20/11£503
Wed 4/1213:30MDW - LHR
1 stop11h 20mVirgin Atlantic
Tue 10/1214:30LHR - MDW
1 stop13h 36mVirgin Atlantic
Deal found 19/11£505

Find flights from Chicago to Heathrow within your budget

Customise your flight search to find flights from Chicago to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 953,013 searches. Data last updated 20 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 20/1

19:10-15:10

1 stop14h 00m

London Heathrow

Mon 27/1

07:05-15:50

1 stop14h 45m

£470

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 21/1

18:30-10:50

1 stop10h 20m

London Heathrow

Tue 22/4

13:05-18:20

1 stop11h 15m

£471

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 6/3

19:10-16:00

1 stop14h 50m

London Heathrow

Wed 12/3

19:30-16:50

1 stop26h 20m

£471

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 8/12

20:25-21:35

1 stop19h 10m

London Heathrow

Tue 10/12

08:15-09:18

2 stops31h 03m

£474

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 22/1

22:00-11:40

Nonstop7h 40m

London Heathrow

Wed 29/1

06:15-14:30

1 stop14h 15m

£475

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 19/1

18:35-08:15

Nonstop7h 40m

London Heathrow

Tue 22/4

10:20-17:25

1 stop13h 05m

£480

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 30/12

21:10-11:15

Nonstop8h 05m

London Heathrow

Tue 14/1

08:30-15:15

1 stop12h 45m

£492

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 26/3

22:45-11:30

Nonstop7h 45m

London Heathrow

Wed 2/4

13:10-15:50

Nonstop8h 40m

£493

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 31/12

14:05-06:30

1 stop10h 25m

London Heathrow

Tue 14/1

06:50-14:45

2 stops13h 55m

£499

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Wed 4/12

10:41-06:20

1 stop13h 39m

London Heathrow

Wed 11/12

08:40-18:32

2 stops15h 52m

£503

Flights are sorted by cheapest return flights first.

Deals found on 19/11

Showing 1-10 of 38 results
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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?

Use this chart to determine the optimal time to book a return flight from Chicago to Heathrow. Price data was last updated on 15 November 2024.

Booking 75 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?

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 November 2024.

It’s typically best to fly out from Chicago to London Heathrow Airport in the morning. Doing so could potentially save you 20% on the flight price compared to flying at midday, which is usually more expensive.

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 November 2024.

The most flights from CHI to LHR are scheduled on a Monday (38 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (33 on average).

Rainfall in Heathrow by month

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

Plan your trip to Heathrow by taking into account the average temperature totals 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 insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 20 November 2024.
Get a feel of what it's like to fly with Iberia, United Airlines and British Airways 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
8,758 reviews
Check prices

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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
8,758 reviews
Delta
8.0
Very Good
8,758 reviews
Check prices

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

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

KLM
7.8
Good
1,350 reviews
Delta
8.0
Very Good
8,758 reviews
Check prices

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

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

Finnair
7.7
Good
1,300 reviews
Delta
8.0
Very Good
8,758 reviews
Check prices

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

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

SWISS
7.6
Good
1,637 reviews
Delta
8.0
Very Good
8,758 reviews
Check prices

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

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

Virgin Atlantic
7.5
Good
663 reviews
Delta
8.0
Very Good
8,758 reviews
Check prices

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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

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?

    Icelandair, at £471, 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 £159 on Icelandair. Other airlines that offer cheap prices include WestJet from £215 and TAP AIR PORTUGAL from £242 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 Brussels Airlines (75%), 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 £3,224, our data shows the cheapest flight currently is £294. 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 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

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Top 8 airlines flying from Chicago to Heathrow

Discover the top 8 airlines that operate flights from Chicago to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 953,013 searches. Data last updated 20 November 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£321Average£785FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Scandinavian AirlinesCheapest£343Average£404FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
FinnairCheapest£377Average£744FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£405Average£748FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Aer LingusCheapest£469Average£679FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£492Average£688FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IberiaCheapest£495Average£675FlexibilityNo cancel feeOn-time77%
Search Iberia flights
United AirlinesCheapest£534Average£744FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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