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

Currently priced at £411, Delta will fly you from London Heathrow Airport to Chicago and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and KLM - these airlines can fly you to your destination from £412 and £413, respectively. These flights start at 22% 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 Aer Lingus, which is currently one of the cheapest options available, starting at £381. TAP AIR PORTUGAL flights start at £386 while deals on Scandinavian Airlines start at £400 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 £1,784, our data indicates the cheapest price to be £373. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £325.

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: Air Canada (92%), Austrian Airlines (92%), United Airlines( 92%).

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 25% 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 £520 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 £612 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 £520 per person but you can even find prices for as low as £316. 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.

£381+ 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 70 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Heathrow to Chicago

Round-trip from	£411
One-way from	£381
Popular in	August
Cheapest in	February
Average price	£548
Good round-trip deal	£472 or less
Good one-way deal	£449 or less

Delta
9/9-18/9
2 total stops
28h 15m total
London to Chicago

Search Deals

Aer Lingus
1/9
1 total stop
11h 10m total
London to Chicago

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£43 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).

Search Deals

Average for round-trip flights in June 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 13 June 2025.

Wed 10/913:30LHR - ORD

1 stop12h 25mLufthansa

Sat 20/922:30ORD - LHR

1 stop13h 10mLufthansa

Deal found 12/6£412

Mon 8/906:30LHR - ORD

1 stop14h 10mKLM

Wed 17/913:16ORD - LHR

1 stop11h 29mKLM

Deal found 10/6£413

Wed 10/908:40LHR - ORD

2 stops17h 43mDelta

Wed 1/1010:10ORD - LHR

1 stop14h 35mDelta

Deal found 11/6£414

Mon 8/908:40LHR - MDW

2 stops15h 57mDelta

Thu 18/910:35MDW - LHR

1 stop14h 10mDelta

Deal found 10/6£414

Wed 27/809:30LHR - ORD

1 stop14h 20mFinnair

Wed 10/922:35ORD - LHR

Nonstop7h 40mFinnair

Deal found 11/6£414

Thu 30/1006:40LHR - ORD

1 stop16h 05mScandinavian Airlines

Sun 2/1119:20ORD - LHR

1 stop14h 40mScandinavian Airlines

Deal found 11/6£416

Thu 25/918:45LHR - ORD

1 stop27h 45mTAP AIR PORTUGAL

Sat 4/1018:15ORD - LHR

1 stop34h 05mTAP AIR PORTUGAL

Deal found 11/6£417

Tue 23/906:15LHR - MDW

2 stops16h 08mVirgin Atlantic

Thu 2/1010:35MDW - LHR

2 stops13h 45mVirgin Atlantic

Deal found 11/6£417

Tue 23/908:40LHR - ORD

1 stop11h 30mVirgin Atlantic

Fri 3/1018:10ORD - LHR

1 stop11h 15mVirgin Atlantic

Deal found 11/6£420

Thu 4/909:50LHR - ORD

1 stop11h 55mBritish Airways

Thu 11/917:00ORD - LHR

Nonstop7h 55mBritish Airways

Deal found 10/6£421

Tue 26/806:10LHR - ORD

1 stop18h 40mAmerican Airlines

Tue 2/913:20ORD - LHR

1 stop14h 30mAmerican Airlines

Deal found 12/6£425

Thu 4/908:40LHR - MDW

2 stops15h 57mKLM

Thu 11/910:35MDW - LHR

1 stop14h 10mKLM

Deal found 10/6£425

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 13 June 2025.

Tue 9/906:30LHR - ORD

1 stop13h 40mDelta

Thu 18/910:10ORD - LHR

1 stop14h 35mDelta

Deal found 12/6£411

Sat 27/914:10LHR - ORD

Nonstop9h 10mLufthansa

Tue 9/1222:35ORD - LHR

1 stop12h 15mLufthansa

Deal found 12/6£412

Mon 8/906:30LHR - ORD

1 stop14h 10mKLM

Wed 17/913:16ORD - LHR

1 stop11h 29mKLM

Deal found 10/6£413

Wed 27/809:30LHR - ORD

1 stop14h 20mFinnair

Wed 10/922:35ORD - LHR

Nonstop7h 40mFinnair

Deal found 11/6£414

Sat 27/912:05LHR - ORD

1 stop11h 28mAir Canada

Tue 9/1216:40ORD - LHR

1 stop12h 40mAir Canada

Deal found 12/6£416

Thu 25/918:45LHR - ORD

1 stop27h 45mTAP AIR PORTUGAL

Sat 4/1018:15ORD - LHR

1 stop34h 05mTAP AIR PORTUGAL

Deal found 11/6£417

Tue 23/908:40LHR - ORD

1 stop11h 30mVirgin Atlantic

Fri 3/1018:10ORD - LHR

1 stop11h 15mVirgin Atlantic

Deal found 11/6£420

Thu 4/909:50LHR - ORD

1 stop11h 55mBritish Airways

Thu 11/917:00ORD - LHR

Nonstop7h 55mBritish Airways

Deal found 10/6£421

Fri 3/1019:50LHR - ORD

2 stops26h 20mScandinavian Airlines

Mon 20/1019:15ORD - LHR

2 stops15h 10mScandinavian Airlines

Deal found 12/6£422

Tue 26/806:10LHR - ORD

1 stop18h 40mAmerican Airlines

Tue 2/913:20ORD - LHR

1 stop14h 30mAmerican Airlines

Deal found 12/6£425

Tue 2/1212:15LHR - ORD

1 stop11h 05mIcelandair

Tue 13/118:30ORD - LHR

1 stop10h 20mIcelandair

Deal found 11/6£428

Sun 7/906:00LHR - ORD

1 stop13h 20mAustrian Airlines

Tue 16/914:53ORD - LHR

1 stop12h 47mAustrian Airlines

Deal found 12/6£433

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 13 June 2025.

Wed 19/1114:10LHR - ORD

Nonstop8h 50mFinnair

Mon 24/1120:45ORD - LHR

Nonstop7h 40mFinnair

Deal found 12/6£414

Tue 23/913:10LHR - ORD

Nonstop8h 45mBritish Airways

Thu 2/1017:45ORD - LHR

Nonstop7h 35mBritish Airways

Deal found 11/6£419

Mon 17/1112:35LHR - ORD

Nonstop8h 50mMultiple Airlines

Sun 30/1120:45ORD - LHR

Nonstop7h 40mMultiple Airlines

Deal found 12/6£439

Mon 25/813:10LHR - ORD

Nonstop8h 45mAmerican Airlines

Thu 4/921:15ORD - LHR

Nonstop7h 40mAmerican Airlines

Deal found 12/6£470

Fri 5/908:30LHR - ORD

Nonstop9h 00mLufthansa

Mon 15/916:00ORD - LHR

Nonstop8h 20mLufthansa

Deal found 12/6£476

Tue 24/609:15LHR - ORD

Nonstop8h 40mIberia

Mon 30/620:30ORD - LHR

Nonstop8h 00mIberia

Deal found 11/6£520

Mon 1/1207:40LHR - ORD

Nonstop9h 20mAustrian Airlines

Sun 11/117:50ORD - LHR

Nonstop8h 05mAustrian Airlines

Deal found 11/6£570

Last-minute flights from Heathrow to Chicago
Discover last-minute flight deals from Heathrow to Chicago. Data last updated 13 June 2025 and is based on user searches.

Sat 14/608:45LHR - ORD

1 stop13h 10mUnited Airlines

Sat 14/620:25ORD - LHR

1 stop28h 10mUnited Airlines

Deal found 12/6£473

Wed 18/608:40LHR - ORD

1 stop11h 30mVirgin Atlantic

Wed 25/613:45ORD - LHR

1 stop15h 25mVirgin Atlantic

Deal found 11/6£436

Wed 18/614:25LHR - ORD

Nonstop8h 35mAmerican Airlines

Wed 25/620:30ORD - LHR

Nonstop8h 00mAmerican Airlines

Deal found 11/6£454

Wed 18/612:15LHR - ORD

Nonstop8h 30mBritish Airways

Thu 26/617:45ORD - LHR

Nonstop7h 35mBritish Airways

Deal found 11/6£456

Wed 18/606:30LHR - ORD

2 stops15h 48mDelta

Wed 25/609:49ORD - LHR

1 stop19h 21mDelta

Deal found 11/6£460

Wed 18/608:00LHR - ORD

1 stop14h 10mTAP AIR PORTUGAL

Sat 12/718:15ORD - LHR

1 stop18h 35mTAP AIR PORTUGAL

Deal found 12/6£530

Thu 19/609:15LHR - ORD

Nonstop8h 40mMultiple Airlines

Wed 2/714:50ORD - LHR

1 stop11h 05mMultiple Airlines

Deal found 11/6£481

Thu 19/609:15LHR - ORD

Nonstop8h 40mFinnair

Wed 2/722:30ORD - LHR

Nonstop7h 45mFinnair

Deal found 11/6£497

Thu 19/613:05LHR - MDW

1 stop14h 40mVirgin Atlantic

Thu 26/612:44MDW - LHR

1 stop12h 01mVirgin Atlantic

Deal found 12/6£525

Fri 20/608:40LHR - MDW

2 stops16h 01mDelta

Mon 7/718:47MDW - LHR

1 stop12h 43mDelta

Deal found 11/6£490

Sat 21/609:20LHR - ORD

1 stop13h 51mKLM

Tue 22/713:26ORD - LHR

1 stop11h 19mKLM

Deal found 11/6£552

Sun 22/608:25LHR - ORD

1 stop29h 30mIcelandair

Fri 27/606:15ORD - LHR

1 stop32h 30mIcelandair

Deal found 12/6£663

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 13 June 2025.

Mon 1/908:50LHR - ORD

1 stop11h 10mAer Lingus

Deal found 11/6£381

Sun 24/815:05LHR - ORD

2 stops34h 12mMultiple Airlines

Deal found 11/6£383

Sat 13/919:50LHR - ORD

1 stop26h 20mTAP AIR PORTUGAL

Deal found 11/6£386

Thu 19/620:55LHR - MDW

3 stops41h 50mMultiple Airlines

Deal found 9/6£394

Fri 5/1206:40LHR - ORD

1 stop16h 05mScandinavian Airlines

Deal found 11/6£400

Wed 20/813:10LHR - ORD

Nonstop8h 45mBritish Airways

Deal found 12/6£414

Mon 25/810:20LHR - ORD

1 stop13h 30mFinnair

Deal found 12/6£423

Thu 28/811:05LHR - ORD

Nonstop9h 05mLufthansa

Deal found 12/6£442

Tue 25/1112:15LHR - ORD

1 stop11h 05mIcelandair

Deal found 10/6£478

Tue 8/714:25LHR - ORD

Nonstop8h 35mIberia

Deal found 11/6£529

Mon 22/909:20LHR - MDW

1 stop18h 24mAir France

Deal found 10/6£567

Tue 7/1014:10LHR - MDW

2 stops37h 34mWestJet

Deal found 10/6£643

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

Wed 10/9

13:30-19:55

1 stop12h 25m

Chicago O'Hare Intl

Sat 20/9

22:30-17:40

1 stop13h 10m

£412

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 8/9

06:30-14:40

1 stop14h 10m

Chicago O'Hare Intl

Wed 17/9

13:16-06:45

1 stop11h 29m

£413

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 10/9

06:30-15:00

2 stops14h 30m

Chicago O'Hare Intl

Wed 17/9

09:30-06:45

1 stop15h 15m

£414

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 8/9

08:40-18:37

2 stops15h 57m

Chicago Midway

Thu 18/9

10:35-06:45

1 stop14h 10m

£414

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 27/8

09:30-17:50

1 stop14h 20m

Chicago O'Hare Intl

Wed 10/9

22:35-12:15

Nonstop7h 40m

£414

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 30/10

06:40-17:45

1 stop16h 05m

Chicago O'Hare Intl

Sun 2/11

19:20-16:00

1 stop14h 40m

£416

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 25/9

18:45-16:30

1 stop27h 45m

Chicago O'Hare Intl

Sat 4/10

18:15-10:20

1 stop34h 05m

£417

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Tue 23/9

06:15-16:23

2 stops16h 08m

Chicago Midway

Thu 2/10

10:35-06:20

2 stops13h 45m

£417

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 23/9

08:40-14:10

1 stop11h 30m

Chicago O'Hare Intl

Fri 3/10

18:10-11:25

1 stop11h 15m

£420

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 4/9

09:50-15:45

1 stop11h 55m

Chicago O'Hare Intl

Thu 11/9

17:00-06:55

Nonstop7h 55m

£421

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 34 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 70 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 18% 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 Monday (53 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (48 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 Austrian Airlines 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

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very Good

7,946 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,358 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Austrian Airlines

7.6

Good

802 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Finnair

7.6

Good

1,290 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Air France

7.5

Good

1,463 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from London Heathrow Airport to Chicago round-trip?
Currently priced at £411, Delta will fly you from London Heathrow Airport to Chicago and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and KLM - these airlines can fly you to your destination from £412 and £413, respectively. These flights start at 22% 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 Aer Lingus, which is currently one of the cheapest options available, starting at £381. TAP AIR PORTUGAL flights start at £386 while deals on Scandinavian Airlines start at £400 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: Air Canada (92%), Austrian Airlines (92%), United Airlines( 92%).
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 £1,784, our data indicates the cheapest price to be £373. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £325.
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

Lufthansa flights from London Heathrow to Chicago

Finnair flights from London Heathrow to Chicago

Alternative routes for Heathrow to Chicago

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Chicago O'Hare Intl Airport to Boston flights

Top 10 airlines flying from Heathrow to Chicago

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£340	Average£472	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Scandinavian Airlines	Cheapest£350	Average£496	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£363	Average£599	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Virgin Atlantic	Cheapest£381	Average£578	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Brussels Airlines	Cheapest£389	Average£629	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Austrian Airlines	Cheapest£397	Average£560	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
Lufthansa	Cheapest£397	Average£569	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£398	Average£566	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
American Airlines	Cheapest£400	Average£620	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
British Airways	Cheapest£404	Average£563	FlexibilityNo cancel fee	On-time70%	Search British Airways 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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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from London Heathrow Airport to Chicago from £381

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 1/9. 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 70 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Heathrow to Chicago

Round-trip from

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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 13 June 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 13 June 2025.

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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 9 June 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 13 June 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 13 June 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 Austrian Airlines 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 13 June 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 13 June 2025.