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

Currently priced at £418, 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 Austrian Airlines and Lufthansa - these airlines can fly you to your destination from £420 and £423, respectively. These flights start at 26% 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 WestJet, which is currently one of the cheapest options available, starting at £356. Icelandair flights start at £387 while deals on Aer Lingus start at £407 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 £1,146, our data indicates the cheapest price to be £438. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £350.

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 (91%), Austrian Airlines (91%), United Airlines( 91%).

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 Monday, 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 19% 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 £541 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 £643 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 £563 per person but you can even find prices for as low as £337. The most expensive prices can be found in the month of August. Opting for a February flight can save you 25% 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.

£318+ Flights from London Heathrow Airport to Chicago

The best prices from London Heathrow to Chicago are usually found in February or March, booked 77 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Heathrow to Chicago

Round-trip from	£417
One-way from	£318
Popular in	August
Cheapest in	February
Average price	£478
Good round-trip deal	£552 or less
Good one-way deal	£570 or less

Austrian Airlines
23/4-29/4
1 total stop
20h 25m total
London to Chicago

Search Deals

19/3
3 total stops
46h 14m total
London to Chicago

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£49 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in February 2025

Search Deals

Price to beat on a round-trip flight from 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 21 February 2025.

Wed 23/406:00LHR - ORD

1 stop12h 10mMultiple Airlines

Tue 29/416:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 20/2£417

Fri 7/307:40LHR - ORD

1 stop12h 30mUnited Airlines

Tue 18/314:16ORD - LHR

1 stop10h 39mUnited Airlines

Deal found 20/2£418

Tue 25/220:40LHR - ORD

1 stop26h 40mIcelandair

Mon 3/318:30ORD - LHR

1 stop19h 00mIcelandair

Deal found 20/2£421

Fri 21/206:00LHR - ORD

1 stop15h 30mTAP AIR PORTUGAL

Fri 28/220:20ORD - LHR

1 stop16h 35mTAP AIR PORTUGAL

Deal found 20/2£423

Thu 6/306:00LHR - ORD

1 stop12h 55mSWISS

Tue 18/320:05ORD - LHR

1 stop11h 55mSWISS

Deal found 20/2£425

Sat 1/314:10LHR - ORD

Nonstop8h 50mBritish Airways

Tue 18/321:15ORD - LHR

Nonstop7h 45mBritish Airways

Deal found 20/2£425

Thu 20/306:30LHR - MDW

2 stops16h 32mKLM

Thu 27/314:55MDW - LHR

1 stop10h 55mKLM

Deal found 20/2£429

Thu 27/214:30LHR - ORD

1 stop13h 36mLufthansa

Wed 2/421:20ORD - LHR

Nonstop8h 25mLufthansa

Deal found 20/2£430

Wed 26/211:55LHR - ORD

Nonstop8h 50mFinnair

Wed 5/316:16ORD - LHR

1 stop10h 19mFinnair

Deal found 19/2£431

Wed 23/414:10LHR - ORD

Nonstop9h 05mBrussels Airlines

Tue 29/421:20ORD - LHR

Nonstop8h 25mBrussels Airlines

Deal found 20/2£440

Fri 28/212:20LHR - MDW

1 stop11h 51mVirgin Atlantic

Thu 3/414:57MDW - LHR

1 stop11h 58mVirgin Atlantic

Deal found 20/2£443

Thu 20/306:20LHR - MDW

2 stops16h 42mAir France

Thu 27/312:51MDW - LHR

1 stop14h 04mAir France

Deal found 20/2£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 21 February 2025.

Wed 23/406:00LHR - ORD

1 stop12h 10mMultiple Airlines

Tue 29/416:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 20/2£417

Fri 14/307:40LHR - ORD

1 stop12h 30mUnited Airlines

Wed 19/310:00ORD - LHR

2 stops16h 10mUnited Airlines

Deal found 20/2£418

Wed 23/419:30LHR - ORD

1 stop23h 50mAustrian Airlines

Wed 30/411:15ORD - LHR

1 stop13h 40mAustrian Airlines

Deal found 20/2£420

Sat 8/307:40LHR - ORD

1 stop12h 30mLufthansa

Wed 12/316:15ORD - LHR

1 stop11h 30mLufthansa

Deal found 20/2£423

Tue 11/308:55LHR - ORD

2 stops15h 42mAir Canada

Tue 25/311:35ORD - LHR

2 stops15h 55mAir Canada

Deal found 19/2£425

Wed 26/311:55LHR - ORD

Nonstop8h 50mBritish Airways

Fri 4/417:45ORD - LHR

Nonstop7h 35mBritish Airways

Deal found 19/2£426

Tue 15/421:25LHR - ORD

1 stop29h 50mIcelandair

Tue 29/419:30ORD - LHR

1 stop10h 25mIcelandair

Deal found 19/2£427

Thu 20/306:30LHR - MDW

2 stops16h 32mKLM

Thu 27/314:55MDW - LHR

1 stop10h 55mKLM

Deal found 20/2£429

Wed 26/211:55LHR - ORD

Nonstop8h 50mFinnair

Wed 5/316:16ORD - LHR

1 stop10h 19mFinnair

Deal found 19/2£431

Tue 18/306:20LHR - ORD

2 stops20h 06mVirgin Atlantic

Mon 24/317:30ORD - LHR

1 stop12h 05mVirgin Atlantic

Deal found 19/2£432

Tue 18/309:10LHR - MDW

1 stop14h 08mAir France

Mon 24/313:16MDW - LHR

1 stop12h 49mAir France

Deal found 19/2£443

Sat 1/311:15LHR - ORD

2 stops16h 00mDelta

Tue 18/314:55ORD - LHR

1 stop12h 00mDelta

Deal found 20/2£447

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 21 February 2025.

Mon 10/310:25LHR - ORD

Nonstop9h 25mLufthansa

Sun 16/318:50ORD - LHR

Nonstop8h 05mLufthansa

Deal found 20/2£419

Sat 1/314:10LHR - ORD

Nonstop8h 50mBritish Airways

Tue 18/321:15ORD - LHR

Nonstop7h 45mBritish Airways

Deal found 20/2£425

Mon 24/313:35LHR - ORD

Nonstop9h 25mMultiple Airlines

Tue 1/418:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 20/2£433

Wed 23/411:05LHR - ORD

Nonstop9h 05mBrussels Airlines

Tue 29/416:05ORD - LHR

Nonstop8h 15mBrussels Airlines

Deal found 20/2£435

Sat 1/310:25LHR - ORD

Nonstop9h 25mUnited Airlines

Thu 27/318:50ORD - LHR

Nonstop8h 05mUnited Airlines

Deal found 20/2£443

Thu 24/408:30LHR - ORD

Nonstop9h 05mAustrian Airlines

Wed 30/416:05ORD - LHR

Nonstop8h 15mAustrian Airlines

Deal found 20/2£445

Sat 1/314:10LHR - ORD

Nonstop8h 50mFinnair

Mon 17/319:30ORD - LHR

Nonstop7h 45mFinnair

Deal found 20/2£449

Mon 3/315:45LHR - ORD

Nonstop9h 00mAmerican Airlines

Tue 25/321:15ORD - LHR

Nonstop7h 45mAmerican Airlines

Deal found 20/2£458

Wed 14/509:15LHR - ORD

Nonstop8h 30mIberia

Sat 17/516:55ORD - LHR

Nonstop7h 55mIberia

Deal found 19/2£674

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

Fri 21/206:00LHR - ORD

1 stop15h 30mTAP AIR PORTUGAL

Fri 28/220:20ORD - LHR

1 stop16h 35mTAP AIR PORTUGAL

Deal found 20/2£423

Tue 25/220:40LHR - ORD

1 stop26h 40mIcelandair

Mon 3/318:30ORD - LHR

1 stop19h 00mIcelandair

Deal found 20/2£421

Wed 26/211:55LHR - ORD

Nonstop8h 50mFinnair

Wed 5/316:16ORD - LHR

1 stop10h 19mFinnair

Deal found 19/2£431

Thu 27/219:55LHR - ORD

1 stop25h 35mTAP AIR PORTUGAL

Wed 2/418:00ORD - LHR

1 stop12h 45mTAP AIR PORTUGAL

Deal found 20/2£418

Fri 28/206:50LHR - ORD

1 stop11h 25mLufthansa

Thu 3/412:55ORD - LHR

1 stop11h 00mLufthansa

Deal found 20/2£417

Fri 28/212:20LHR - MDW

1 stop11h 51mVirgin Atlantic

Thu 3/414:57MDW - LHR

1 stop11h 58mVirgin Atlantic

Deal found 20/2£443

Sat 1/314:10LHR - ORD

Nonstop8h 50mBritish Airways

Tue 18/321:15ORD - LHR

Nonstop7h 45mBritish Airways

Deal found 20/2£425

Sat 1/310:25LHR - ORD

Nonstop9h 25mAustrian Airlines

Tue 18/313:00ORD - LHR

1 stop12h 40mAustrian Airlines

Deal found 20/2£433

Sat 1/309:10LHR - MDW

1 stop14h 33mKLM

Tue 18/314:55MDW - LHR

1 stop10h 55mKLM

Deal found 20/2£442

Sat 1/312:40LHR - ORD

1 stop14h 44mVirgin Atlantic

Mon 17/318:36ORD - LHR

1 stop10h 54mVirgin Atlantic

Deal found 20/2£444

Sat 1/311:15LHR - ORD

2 stops16h 00mDelta

Tue 18/314:55ORD - LHR

1 stop12h 00mDelta

Deal found 20/2£447

Sat 1/308:40LHR - MDW

2 stops15h 03mDelta

Mon 17/316:59MDW - LHR

1 stop13h 41mDelta

Deal found 20/2£447

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 21 February 2025.

Wed 19/315:15LHR - ORD

3 stops46h 14mMultiple Airlines

Deal found 20/2£318

Tue 18/320:50LHR - MDW

2 stops47h 23mMultiple Airlines

Deal found 19/2£320

Wed 5/314:50LHR - ORD

1 stop31h 06mWestJet

Deal found 20/2£356

Tue 22/421:25LHR - ORD

1 stop26h 55mIcelandair

Deal found 19/2£387

Sun 23/208:50LHR - ORD

1 stop16h 25mAer Lingus

Deal found 19/2£407

Sun 18/508:00LHR - ORD

1 stop14h 10mTAP AIR PORTUGAL

Deal found 19/2£434

Fri 7/311:55LHR - ORD

Nonstop8h 50mFinnair

Deal found 19/2£474

Fri 28/211:55LHR - ORD

Nonstop8h 50mBritish Airways

Deal found 19/2£477

Mon 3/310:25LHR - ORD

Nonstop9h 25mLufthansa

Deal found 20/2£497

Fri 28/313:35LHR - ORD

Nonstop9h 25mAustrian Airlines

Deal found 20/2£499

Wed 19/311:00LHR - ORD

Nonstop8h 55mIberia

Deal found 19/2£503

Tue 22/411:45LHR - MDW

1 stop12h 35mAir France

Deal found 19/2£516

Find flights from Heathrow to Chicago within your budget

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 23/4

06:00-12:10

1 stop12h 10m

Chicago O'Hare Intl

Tue 29/4

16:05-06:20

Nonstop8h 15m

£417

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 7/3

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

Tue 18/3

14:16-05:55

1 stop10h 39m

£418

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 8/3

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

Wed 12/3

16:15-08:45

1 stop11h 30m

£423

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 6/3

06:00-12:55

1 stop12h 55m

Chicago O'Hare Intl

Tue 18/3

20:05-13:00

1 stop11h 55m

£425

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 12/3

10:25-14:50

Nonstop9h 25m

Chicago O'Hare Intl

Wed 26/3

18:50-07:55

Nonstop8h 05m

£425

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 5/3

11:55-14:45

Nonstop8h 50m

Chicago O'Hare Intl

Sun 9/3

21:15-10:00

Nonstop7h 45m

£427

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Thu 20/3

06:30-18:02

2 stops16h 32m

Chicago Midway

Thu 27/3

12:51-07:55

1 stop14h 04m

£429

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 23/4

11:05-13:50

Nonstop8h 45m

Chicago O'Hare Intl

Tue 29/4

16:55-06:50

Nonstop7h 55m

£429

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 7/5

13:05-21:15

1 stop14h 10m

Chicago O'Hare Intl

Wed 8/10

19:25-11:55

1 stop10h 30m

£430

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 23/4

14:10-17:15

Nonstop9h 05m

Chicago O'Hare Intl

Tue 29/4

21:20-11:45

Nonstop8h 25m

£440

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 37 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.

Travel insights for flights from Heathrow to Chicago

Get recent, data-driven insights about flights from Heathrow to Chicago including ideal travel times, pricing trends, and more.

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 13% 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 Wednesday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (33 on average).

Rainfall in 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

8,217 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

8,217 reviews

Delta

8.0

Very Good

8,217 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

1,333 reviews

Delta

8.0

Very Good

8,217 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

1,273 reviews

Delta

8.0

Very Good

8,217 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

7.5

Good

771 reviews

Delta

8.0

Very Good

8,217 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

SWISS

7.5

Good

1,568 reviews

Delta

8.0

Very Good

8,217 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 £418, 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 Austrian Airlines and Lufthansa - these airlines can fly you to your destination from £420 and £423, respectively. These flights start at 26% 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 WestJet, which is currently one of the cheapest options available, starting at £356. Icelandair flights start at £387 while deals on Aer Lingus start at £407 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 (91%), Austrian Airlines (91%), United Airlines( 91%).
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 £1,146, our data indicates the cheapest price to be £438. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £350.
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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Chicago O'Hare Intl Airport to Dallas/Fort Worth Airport flights

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Chicago O'Hare Intl Airport to Reykjavik Keflavik Intl Airport flights

Top 10 airlines flying from Heathrow to Chicago

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£368	Average£541	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Scandinavian Airlines	Cheapest£376	Average£530	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£388	Average£585	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Virgin Atlantic	Cheapest£417	Average£627	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Austrian Airlines	Cheapest£434	Average£599	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
Lufthansa	Cheapest£437	Average£594	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£440	Average£624	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
British Airways	Cheapest£445	Average£604	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Aer Lingus	Cheapest£453	Average£595	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Finnair	Cheapest£473	Average£611	FlexibilityNo cancel fee	On-time76%	Search Finnair 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 £318

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 19/3. Fares are subject to change and may not be available on all flights or dates of travel.

The best prices from London Heathrow to Chicago are usually found in February or March, booked 77 days in advance, depart on a Tuesday or Wednesday 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 21 February 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 21 February 2025.

Find flights from Heathrow to Chicago within your budget

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.

Travel insights for flights from Heathrow to Chicago

Get recent, data-driven insights about flights from Heathrow to Chicago including ideal travel times, pricing trends, and more.

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 14 February 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 21 February 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 21 February 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

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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 21 February 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 21 February 2025.