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

Currently priced at £413, United Airlines will fly you from London Heathrow Airport to Chicago and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from SWISS and Lufthansa - these airlines can fly you to your destination from £416 and £416, respectively. These flights start at 24% lower than the current average price 3 months from now.

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

To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at £378. Aer Lingus flights start at £382 while deals on WestJet start at £384 one-way.

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

Looking for the cheapest flight from London Heathrow Airport to Chicago? While on average our users pay £1,504, our data indicates the cheapest price to be £423. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £397.

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

Before booking your flight to Chicago from London Heathrow Airport, check out the most reliable airlines to get you to your destination on time: United Airlines (95%), Austrian Airlines (93%), Brussels Airlines( 93%).

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

When booking a flight from London Heathrow Airport to Chicago, you may want to consider flying on American Airlines, Air Canada or Finnair as they are the most popular for this route.

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

It’s generally more expensive to depart on a Tuesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

Users have found that booking a flight from London Heathrow Airport to Chicago at least 45 days early can save you up to 15% on average compared to booking a flight this week. If booking 45 days before your flight isn’t an option for you, users have found flights from London Heathrow Airport to Chicago for as little as £533 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as £622 for flights departing within the next 3 days.

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

February is one of the best times of the year to fly to Chicago from London Heathrow Airport. Prices for February average £539 per person but you can even find prices for as low as £325. The most expensive prices can be found in the month of August. Opting for a February flight can save you 27% on your journey compared to booking in August

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

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

How can I find direct flights from Heathrow to Chicago?

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

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

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

£375+ Flights from London Heathrow Airport to Chicago

Cheapflights Tip: The best prices from London Heathrow to Chicago are usually found in February or March, booked 47 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Heathrow to Chicago

Round-trip from	£413
One-way from	£375
Popular in	August
Cheapest in	February
Average price	£516
Good round-trip deal	£544 or less
Good one-way deal	£547 or less

United Airlines
1/5-5/5
2 total stops
25h 30m total
London to Chicago

Search Deals

24/4
3 total stops
51h 47m total
London to Chicago

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£48 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

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

Search Deals

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

Search Deals

Find flight deals from Heathrow to Chicago

Cheapest flights from Heathrow to Chicago
Explore the most affordable flight options available from Heathrow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.

Thu 1/508:40LHR - ORD

1 stop13h 15mUnited Airlines

Wed 7/513:00ORD - LHR

2 stops15h 00mUnited Airlines

Deal found 13/4£413

Tue 22/406:00LHR - ORD

1 stop12h 10mMultiple Airlines

Mon 28/418:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 15/4£414

Sat 10/506:00LHR - ORD

1 stop13h 20mAustrian Airlines

Mon 12/518:05ORD - LHR

Nonstop8h 15mAustrian Airlines

Deal found 14/4£416

Wed 7/506:55LHR - ORD

1 stop13h 00mLufthansa

Mon 12/518:05ORD - LHR

Nonstop8h 15mLufthansa

Deal found 14/4£416

Wed 17/906:50LHR - ORD

2 stops14h 00mAir Canada

Wed 24/915:40ORD - LHR

1 stop12h 20mAir Canada

Deal found 14/4£419

Thu 24/412:15LHR - ORD

Nonstop8h 30mBritish Airways

Fri 2/517:45ORD - LHR

Nonstop7h 35mBritish Airways

Deal found 14/4£421

Tue 6/513:05LHR - ORD

1 stop11h 10mIcelandair

Wed 14/519:25ORD - LHR

1 stop10h 30mIcelandair

Deal found 14/4£424

Mon 21/408:40LHR - ORD

1 stop11h 30mVirgin Atlantic

Sun 4/516:15ORD - LHR

1 stop14h 55mVirgin Atlantic

Deal found 14/4£425

Wed 30/407:00LHR - ORD

2 stops14h 55mSWISS

Thu 8/518:35ORD - LHR

1 stop12h 25mSWISS

Deal found 14/4£441

Thu 11/911:45LHR - MDW

1 stop12h 51mAir France

Tue 23/918:50MDW - LHR

1 stop12h 40mAir France

Deal found 14/4£441

Thu 24/411:45LHR - MDW

1 stop12h 35mVirgin Atlantic

Fri 2/519:00MDW - LHR

1 stop12h 10mVirgin Atlantic

Deal found 14/4£441

Wed 7/508:40LHR - ORD

1 stop12h 00mDelta

Thu 15/507:00ORD - LHR

1 stop18h 15mDelta

Deal found 14/4£444

Best flights from Heathrow to Chicago
Discover carefully curated flight deals from Heathrow to Chicago that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 April 2025.

Thu 1/508:40LHR - ORD

1 stop13h 15mUnited Airlines

Mon 5/516:25ORD - LHR

1 stop12h 15mUnited Airlines

Deal found 14/4£413

Sat 10/506:00LHR - ORD

1 stop12h 45mSWISS

Sun 11/514:20ORD - LHR

1 stop11h 35mSWISS

Deal found 14/4£416

Wed 7/506:55LHR - ORD

1 stop13h 00mLufthansa

Mon 12/518:05ORD - LHR

Nonstop8h 15mLufthansa

Deal found 14/4£416

Sat 26/409:00LHR - ORD

1 stop15h 15mMultiple Airlines

Wed 30/407:20ORD - LHR

1 stop20h 40mMultiple Airlines

Deal found 14/4£417

Wed 17/906:50LHR - ORD

2 stops14h 00mAir Canada

Wed 24/915:40ORD - LHR

1 stop12h 20mAir Canada

Deal found 14/4£419

Thu 8/512:15LHR - ORD

Nonstop8h 25mBritish Airways

Mon 12/520:30ORD - LHR

Nonstop8h 00mBritish Airways

Deal found 14/4£420

Tue 6/513:05LHR - ORD

1 stop11h 10mIcelandair

Wed 14/519:25ORD - LHR

1 stop10h 30mIcelandair

Deal found 14/4£424

Tue 6/506:00LHR - ORD

1 stop13h 20mAustrian Airlines

Thu 15/516:05ORD - LHR

Nonstop8h 15mAustrian Airlines

Deal found 14/4£438

Thu 11/911:45LHR - MDW

1 stop12h 51mAir France

Tue 23/918:50MDW - LHR

1 stop12h 40mAir France

Deal found 14/4£441

Thu 24/411:45LHR - MDW

1 stop12h 35mVirgin Atlantic

Fri 2/519:00MDW - LHR

1 stop12h 10mVirgin Atlantic

Deal found 14/4£441

Wed 7/508:40LHR - ORD

1 stop12h 00mDelta

Thu 15/507:00ORD - LHR

1 stop18h 15mDelta

Deal found 14/4£444

Mon 12/509:45LHR - ORD

1 stop13h 49mAmerican Airlines

Mon 19/515:20ORD - LHR

1 stop10h 30mAmerican Airlines

Deal found 14/4£445

Direct flights from Heathrow to Chicago
Explore direct flight options from Heathrow to Chicago based on user searches, and compare prices and availability for your desired travel dates. Data last updated 15 April 2025.

Thu 18/915:30LHR - ORD

Nonstop8h 45mBritish Airways

Mon 29/917:45ORD - LHR

Nonstop7h 35mBritish Airways

Deal found 13/4£418

Fri 25/414:10LHR - ORD

Nonstop9h 05mLufthansa

Sun 4/521:20ORD - LHR

Nonstop8h 25mLufthansa

Deal found 14/4£430

Thu 8/514:25LHR - ORD

Nonstop8h 35mMultiple Airlines

Mon 12/521:15ORD - LHR

Nonstop7h 45mMultiple Airlines

Deal found 14/4£434

Sat 10/508:30LHR - ORD

Nonstop9h 05mUnited Airlines

Mon 12/518:05ORD - LHR

Nonstop8h 15mUnited Airlines

Deal found 14/4£439

Thu 1/509:15LHR - ORD

Nonstop8h 30mFinnair

Sun 11/522:25ORD - LHR

Nonstop7h 50mFinnair

Deal found 13/4£451

Thu 8/509:15LHR - ORD

Nonstop8h 30mIberia

Wed 14/522:25ORD - LHR

Nonstop7h 50mIberia

Deal found 14/4£457

Fri 5/908:30LHR - ORD

Nonstop9h 00mAustrian Airlines

Mon 15/916:00ORD - LHR

Nonstop8h 20mAustrian Airlines

Deal found 14/4£499

Wed 21/511:05LHR - ORD

Nonstop9h 05mBrussels Airlines

Sat 14/616:05ORD - LHR

Nonstop8h 15mBrussels Airlines

Deal found 14/4£549

Tue 13/509:15LHR - ORD

Nonstop8h 30mAmerican Airlines

Tue 20/521:15ORD - LHR

Nonstop7h 45mAmerican Airlines

Deal found 15/4£554

Last-minute flights from Heathrow to Chicago
Discover last-minute flight deals from Heathrow to Chicago. Data last updated 15 April 2025 and is based on user searches.

Sun 20/421:25LHR - ORD

1 stop26h 50mIcelandair

Wed 2/719:25ORD - LHR

1 stop10h 30mIcelandair

Deal found 14/4£451

Sun 20/406:00LHR - ORD

1 stop12h 10mMultiple Airlines

Sat 3/518:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 13/4£413

Sun 20/408:40LHR - ORD

1 stop11h 30mVirgin Atlantic

Sat 3/518:59ORD - LHR

1 stop12h 11mVirgin Atlantic

Deal found 13/4£415

Sun 20/419:30LHR - ORD

1 stop23h 50mAustrian Airlines

Sat 3/511:14ORD - LHR

1 stop17h 26mAustrian Airlines

Deal found 13/4£416

Sun 20/406:00LHR - ORD

2 stops19h 30mAir Canada

Sat 3/515:35ORD - LHR

1 stop12h 25mAir Canada

Deal found 13/4£417

Mon 21/408:40LHR - ORD

1 stop13h 15mSWISS

Sun 4/518:35ORD - LHR

1 stop12h 25mSWISS

Deal found 14/4£416

Mon 21/408:30LHR - ORD

Nonstop9h 05mLufthansa

Sun 4/518:05ORD - LHR

Nonstop8h 15mLufthansa

Deal found 14/4£416

Mon 21/408:40LHR - ORD

1 stop11h 30mVirgin Atlantic

Sun 4/516:15ORD - LHR

1 stop14h 55mVirgin Atlantic

Deal found 14/4£425

Mon 21/408:40LHR - ORD

2 stops16h 09mDelta

Sun 4/510:25ORD - LHR

1 stop15h 40mDelta

Deal found 14/4£448

Mon 21/408:40LHR - MDW

2 stops15h 40mDelta

Sun 4/519:00MDW - LHR

1 stop12h 10mDelta

Deal found 14/4£448

Tue 22/406:00LHR - ORD

1 stop12h 10mMultiple Airlines

Mon 28/418:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 15/4£414

Thu 24/408:40LHR - ORD

1 stop13h 15mUnited Airlines

Mon 28/410:37ORD - LHR

1 stop18h 58mUnited Airlines

Deal found 14/4£413

One-way flights from Heathrow to Chicago
Search for one-way flight options from Heathrow to Chicago. Find affordable one-way fares based on user searches. Data last updated 15 April 2025.

Thu 24/421:05LHR - ORD

3 stops51h 47mMultiple Airlines

Deal found 14/4£375

Mon 26/506:20LHR - MDW

3 stops32h 25mMultiple Airlines

Deal found 14/4£378

Tue 13/518:45LHR - ORD

1 stop27h 25mTAP AIR PORTUGAL

Deal found 14/4£378

Tue 6/507:40LHR - ORD

1 stop12h 20mAer Lingus

Deal found 14/4£382

Fri 9/514:10LHR - ORD

1 stop32h 34mWestJet

Deal found 14/4£384

Tue 22/413:30LHR - ORD

1 stop12h 25mLufthansa

Deal found 14/4£401

Wed 30/414:10LHR - ORD

Nonstop9h 05mAustrian Airlines

Deal found 14/4£462

Wed 10/913:10LHR - ORD

Nonstop8h 45mBritish Airways

Deal found 14/4£466

Sat 23/813:05LHR - ORD

1 stop11h 10mIcelandair

Deal found 14/4£471

Fri 30/512:15LHR - ORD

Nonstop8h 25mFinnair

Deal found 14/4£504

Sun 18/508:30LHR - ORD

Nonstop9h 05mBrussels Airlines

Deal found 14/4£514

Tue 6/509:15LHR - ORD

Nonstop8h 30mIberia

Deal found 14/4£546

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 1/5

08:40-15:55

1 stop13h 15m

Chicago O'Hare Intl

Wed 7/5

13:00-10:00

2 stops15h 00m

£413

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 10/5

06:00-12:45

1 stop12h 45m

Chicago O'Hare Intl

Sun 11/5

14:20-07:55

1 stop11h 35m

£416

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 7/5

06:55-13:55

1 stop13h 00m

Chicago O'Hare Intl

Mon 12/5

18:05-08:20

Nonstop8h 15m

£416

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 26/4

09:00-18:15

1 stop15h 15m

Chicago O'Hare Intl

Wed 30/4

07:20-10:00

1 stop20h 40m

£417

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 17/9

06:50-14:50

2 stops14h 00m

Chicago O'Hare Intl

Wed 24/9

15:40-10:00

1 stop12h 20m

£419

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 8/5

12:15-14:40

Nonstop8h 25m

Chicago O'Hare Intl

Mon 12/5

20:30-10:30

Nonstop8h 00m

£420

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 6/5

13:05-18:15

1 stop11h 10m

Chicago O'Hare Intl

Wed 14/5

19:25-11:55

1 stop10h 30m

£424

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 6/5

06:00-13:20

1 stop13h 20m

Chicago O'Hare Intl

Thu 15/5

16:05-06:20

Nonstop8h 15m

£438

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Thu 11/9

11:45-18:36

1 stop12h 51m

Chicago Midway

Tue 23/9

18:50-13:30

1 stop12h 40m

£441

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Thu 24/4

11:45-18:20

1 stop12h 35m

Chicago Midway

Fri 2/5

19:00-13:10

1 stop12h 10m

£441

Flights are sorted by cheapest return flights first.

Deals found on 14/4

Showing 1-10 of 35 results

Best time to book a flight from Heathrow to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Heathrow 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.

Cheapflights Insights

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

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

Booking 47 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Chicago. 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 London Heathrow Airport to Chicago?

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of £595). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of £843). 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 LHR to CHI?

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Chicago in the evening. If you’re flexible enough to do this you can expect to save up to 15% on your trip compared to booking a flight in the afternoon.

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

Travellers seeking maximum savings on their London Heathrow Airport to Chicago flight should consider departing on Wednesday evenings 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.

Weekly flight availability from London Heathrow Airport to Chicago

The most flights from LHR to CHI are scheduled on a Saturday (54 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (44 on average).

Rainfall in Chicago by month

In terms of precipitation, rainfall in Chicago ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Chicago when rainfall is around 43.0 mm.

Temperature in Chicago by month

If weather is an important factor for your trip to Chicago, 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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

Reviews of airlines servicing Chicago

Peruse reviews from past customers who have flown with Delta, KLM and Finnair from London to Chicago to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very Good

7,917 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,323 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,269 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines

7.6

Good

775 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France

7.5

Good

1,435 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What are the cheapest airlines flying from London Heathrow Airport to Chicago round-trip?
Currently priced at £413, United Airlines will fly you from London Heathrow Airport to Chicago and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from SWISS and Lufthansa - these airlines can fly you to your destination from £416 and £416, respectively. These flights start at 24% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from London Heathrow Airport to Chicago one-way?
To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at £378. Aer Lingus flights start at £382 while deals on WestJet start at £384 one-way.
What are the most reliable airlines from London Heathrow Airport to Chicago?
Before booking your flight to Chicago from London Heathrow Airport, check out the most reliable airlines to get you to your destination on time: United Airlines (95%), Austrian Airlines (93%), Brussels Airlines( 93%).
What are the cheapest flights from London Heathrow Airport to Chicago?
Looking for the cheapest flight from London Heathrow Airport to Chicago? While on average our users pay £1,504, our data indicates the cheapest price to be £423. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £397.
Can I find deals for flights from Heathrow to Chicago that include hotel bookings?
Yes. In addition to deals on Heathrow to Chicago flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Chicago?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Chicago.
Can I find deals for business class flights from Heathrow to Chicago?
Yes. Cheapflights offers flight deals from Heathrow to Chicago 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 London Heathrow Airport to Chicago?
Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of £595). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of £843). 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

Fly from Heathrow to Chicago on these airlines

British Airways flights from London Heathrow to Chicago

Finnair flights from London Heathrow to Chicago

Lufthansa flights from London Heathrow to Chicago

Alternative routes for Heathrow to Chicago

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Top 10 airlines flying from Heathrow to Chicago

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£352	Average£497	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Scandinavian Airlines	Cheapest£361	Average£507	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£375	Average£601	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Austrian Airlines	Cheapest£415	Average£568	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
United Airlines	Cheapest£417	Average£588	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Atlantic	Cheapest£421	Average£602	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Lufthansa	Cheapest£422	Average£576	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£426	Average£580	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Brussels Airlines	Cheapest£430	Average£665	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Aer Lingus	Cheapest£437	Average£585	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

Fly with Cheapflights

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

Cheapflights makes it easy to find Heathrow to Chicago flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights helps you find that perfect flight to Chicago from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Certainly. Search results for flights to Chicago from Heathrow 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 Heathrow to Chicago become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Chicago flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from London Heathrow Airport to Chicago from £375

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 24/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London Heathrow to Chicago are usually found in February or March, booked 47 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Heathrow to Chicago

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Find flight deals from Heathrow to Chicago

Cheapest flights from Heathrow to ChicagoExplore the most affordable flight options available from Heathrow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.

Explore the most affordable flight options available from Heathrow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Heathrow to Chicago

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Chicago. Price data was last updated on 11 April 2025.

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

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

Find hourly flight availability from Heathrow to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 April 2025.

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

Use this chart to determine the cheapest time to fly return from Heathrow to Chicago. Price data was last updated on 16 December 2024.

Weekly flight availability from London Heathrow Airport to Chicago

Explore weekly flight availability from Heathrow to Chicago. 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 15 April 2025.

Rainfall in Chicago by month

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

Temperature in Chicago by month

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

Reviews of airlines servicing Chicago

Peruse reviews from past customers who have flown with Delta, KLM and Finnair from London to Chicago to help guide your decision. You can also see how each airline stacks up 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 Heathrow to Chicago. 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 London Heathrow Airport to Chicago round-trip?

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

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

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

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

How can I find direct flights from Heathrow to Chicago?

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

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

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.

Fly from Heathrow to Chicago on these airlines

Choose from the following airlines for your flight from Heathrow to Chicago. Flights are based on user searches made on Cheapflights and were last updated on 15 April 2025.

Top 10 airlines flying from Heathrow to Chicago

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Cheapest flights from Heathrow to Chicago
Explore the most affordable flight options available from Heathrow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.