How long is the flight from London Heathrow Airport to Chicago?

There are many flights that can get you from London Heathrow Airport to Chicago in 14h 50m. Fly via United Airlines, Scandinavian Airlines, or Virgin Atlantic to get the fastest option. London Heathrow Airport and Chicago are separated by a distance of 3939 mi. This flight may include one or multiple stops.

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

Currently priced at £341, Icelandair will fly you from London Heathrow Airport to Chicago and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Scandinavian Airlines and TAP AIR PORTUGAL - these airlines can fly you to your destination from £351 and £365, respectively. These flights start at 34% 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 Delta, which is currently one of the cheapest options available, starting at £401. TAP AIR PORTUGAL flights start at £406 while deals on Austrian Airlines start at £408 one-way.

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.

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).

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 £1,443, our data indicates the cheapest price to be £421. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £321.

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 (75%), Austrian Airlines (75%), United Airlines( 75%).

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, Finnair or British Airways 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 56 days early can save you up to 35% on average compared to booking a flight this week. If booking 56 days before your flight isn’t an option for you, users have found flights from London Heathrow Airport to Chicago for as little as £489 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 £659 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 £510 per person but you can even find prices for as low as £313. The most expensive prices can be found in the month of July. Opting for a February flight can save you 25% on your journey compared to booking in July

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.

£395+ Cheap 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 45 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Cheap flight deals from Heathrow to Chicago

Round-trip from	£396
Popular in	July
Cheapest in	February
Average price	£449
Good round-trip deal	£498 or less
Good one-way deal	£495 or less

Lufthansa
26/9-29/9
Nonstop
17h 25m total
London to Chicago

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (£50 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 September 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 14 September 2025.

Thu 18/906:50LHR - ORD

1 stop11h 15mMultiple Airlines

Sun 21/921:50ORD - LHR

Nonstop7h 55mMultiple Airlines

Deal found 12/9£395

Fri 19/906:50LHR - ORD

1 stop11h 15mUnited Airlines

Fri 26/914:39ORD - LHR

1 stop10h 16mUnited Airlines

Deal found 12/9£396

Thu 2/1014:10LHR - ORD

Nonstop9h 10mLufthansa

Wed 8/1014:20ORD - LHR

1 stop10h 55mLufthansa

Deal found 13/9£397

Thu 9/1007:45LHR - ORD

2 stops14h 50mUnited Airlines

Wed 15/1013:55ORD - LHR

1 stop12h 40mUnited Airlines

Deal found 12/9£397

Thu 6/1114:10LHR - ORD

Nonstop8h 50mBritish Airways

Wed 12/1118:30ORD - LHR

Nonstop7h 45mBritish Airways

Deal found 12/9£398

Thu 25/909:15LHR - ORD

Nonstop8h 35mBritish Airways

Mon 29/920:40ORD - LHR

Nonstop7h 50mBritish Airways

Deal found 14/9£399

Fri 26/911:05LHR - ORD

Nonstop9h 05mBrussels Airlines

Mon 29/921:25ORD - LHR

Nonstop8h 20mBrussels Airlines

Deal found 12/9£400

Wed 24/911:05LHR - ORD

Nonstop9h 05mMultiple Airlines

Sat 4/1016:00ORD - LHR

Nonstop8h 20mMultiple Airlines

Deal found 14/9£400

Mon 29/1220:35LHR - ORD

1 stop26h 45mIcelandair

Sun 11/118:30ORD - LHR

1 stop10h 20mIcelandair

Deal found 13/9£401

Thu 9/1007:45LHR - ORD

2 stops14h 50mUnited Airlines

Mon 13/1018:00ORD - LHR

1 stop15h 40mUnited Airlines

Deal found 12/9£402

Thu 25/913:05LHR - MDW

1 stop14h 31mVirgin Atlantic

Sun 28/912:43MDW - LHR

1 stop12h 32mVirgin Atlantic

Deal found 13/9£402

Thu 9/1009:15LHR - ORD

1 stop12h 50mBritish Airways

Thu 16/1017:40ORD - LHR

Nonstop7h 40mBritish Airways

Deal found 13/9£403

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 14 September 2025.

Wed 1/1007:45LHR - ORD

2 stops14h 50mUnited Airlines

Tue 21/1013:17ORD - LHR

1 stop11h 58mUnited Airlines

Deal found 13/9£397

Thu 30/1006:40LHR - ORD

1 stop17h 05mScandinavian Airlines

Sun 2/1119:20ORD - LHR

2 stops17h 30mScandinavian Airlines

Deal found 12/9£402

Tue 28/1007:40LHR - ORD

Nonstop9h 20mAustrian Airlines

Tue 4/1115:45ORD - LHR

Nonstop8h 10mAustrian Airlines

Deal found 13/9£414

Sat 6/1210:25LHR - ORD

Nonstop9h 20mBrussels Airlines

Sun 7/1217:50ORD - LHR

Nonstop8h 05mBrussels Airlines

Deal found 13/9£414

Fri 28/1106:30LHR - MDW

2 stops17h 48mDelta

Sun 30/1113:47MDW - LHR

1 stop11h 18mDelta

Deal found 12/9£422

Sat 6/1212:35LHR - ORD

Nonstop8h 50mBritish Airways

Sun 7/1217:04ORD - LHR

1 stop10h 26mBritish Airways

Deal found 13/9£422

Fri 14/1106:30LHR - MDW

2 stops17h 48mVirgin Atlantic

Sat 22/1113:47MDW - LHR

1 stop11h 18mVirgin Atlantic

Deal found 13/9£422

Thu 9/1007:45LHR - ORD

2 stops14h 50mUnited Airlines

Mon 13/1005:01ORD - LHR

1 stop22h 39mUnited Airlines

Deal found 14/9£397

Tue 23/1219:30LHR - ORD

1 stop27h 15mScandinavian Airlines

Thu 1/119:20ORD - LHR

1 stop32h 00mScandinavian Airlines

Deal found 13/9£422

Sat 6/1206:30LHR - MDW

2 stops17h 48mDelta

Sun 7/1218:40MDW - LHR

2 stops34h 10mDelta

Deal found 13/9£422

Fri 16/106:30LHR - MDW

2 stops18h 04mVirgin Atlantic

Tue 20/113:00MDW - LHR

2 stops12h 50mVirgin Atlantic

Deal found 11/9£428

Wed 8/1007:45LHR - ORD

2 stops14h 50mUnited Airlines

Sun 19/1014:08ORD - LHR

1 stop10h 22mUnited Airlines

Deal found 13/9£397

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 14 September 2025.

Fri 26/911:05LHR - ORD

Nonstop9h 05mLufthansa

Mon 29/916:00ORD - LHR

Nonstop8h 20mLufthansa

Deal found 12/9£396

Thu 6/1114:10LHR - ORD

Nonstop8h 50mBritish Airways

Wed 12/1118:30ORD - LHR

Nonstop7h 45mBritish Airways

Deal found 12/9£398

Thu 25/909:15LHR - ORD

Nonstop8h 35mBritish Airways

Mon 29/920:40ORD - LHR

Nonstop7h 50mBritish Airways

Deal found 14/9£399

Fri 26/911:05LHR - ORD

Nonstop9h 05mBrussels Airlines

Mon 29/921:25ORD - LHR

Nonstop8h 20mBrussels Airlines

Deal found 12/9£400

Wed 24/911:05LHR - ORD

Nonstop9h 05mMultiple Airlines

Sat 4/1016:00ORD - LHR

Nonstop8h 20mMultiple Airlines

Deal found 14/9£400

Sat 8/1111:00LHR - ORD

Nonstop8h 50mBritish Airways

Sat 8/1117:10ORD - LHR

Nonstop7h 45mBritish Airways

Deal found 12/9£403

Tue 7/1008:30LHR - ORD

Nonstop9h 00mAustrian Airlines

Wed 15/1021:25ORD - LHR

Nonstop8h 20mAustrian Airlines

Deal found 12/9£405

Mon 6/1008:30LHR - ORD

Nonstop9h 00mAustrian Airlines

Sun 12/1021:25ORD - LHR

Nonstop8h 20mAustrian Airlines

Deal found 13/9£408

Tue 7/1011:05LHR - ORD

Nonstop9h 05mLufthansa

Wed 15/1016:00ORD - LHR

Nonstop8h 20mLufthansa

Deal found 12/9£408

Fri 3/1014:25LHR - ORD

Nonstop8h 35mBritish Airways

Mon 6/1022:35ORD - LHR

Nonstop7h 40mBritish Airways

Deal found 12/9£409

Thu 20/1111:00LHR - ORD

Nonstop8h 50mBritish Airways

Mon 24/1120:40ORD - LHR

Nonstop7h 45mBritish Airways

Deal found 12/9£410

Last-minute flights from Heathrow to Chicago
Discover last-minute flight deals from Heathrow to Chicago. Data last updated 14 September 2025 and is based on user searches.

Thu 18/906:50LHR - ORD

1 stop11h 15mMultiple Airlines

Sun 21/921:50ORD - LHR

Nonstop7h 55mMultiple Airlines

Deal found 12/9£395

Fri 19/906:50LHR - ORD

1 stop11h 15mUnited Airlines

Fri 26/914:39ORD - LHR

1 stop10h 16mUnited Airlines

Deal found 12/9£396

Sat 20/906:50LHR - ORD

1 stop11h 15mMultiple Airlines

Sat 27/916:00ORD - LHR

Nonstop8h 20mMultiple Airlines

Deal found 12/9£403

Sat 20/906:50LHR - ORD

1 stop11h 15mUnited Airlines

Fri 3/1018:00ORD - LHR

Nonstop8h 20mUnited Airlines

Deal found 13/9£404

Tue 23/909:15LHR - ORD

Nonstop8h 35mBritish Airways

Sun 5/1022:35ORD - LHR

Nonstop7h 40mBritish Airways

Deal found 12/9£398

Thu 25/913:05LHR - MDW

1 stop14h 31mVirgin Atlantic

Sun 28/912:43MDW - LHR

1 stop12h 32mVirgin Atlantic

Deal found 13/9£402

Fri 26/911:05LHR - ORD

Nonstop9h 05mBrussels Airlines

Mon 29/921:25ORD - LHR

Nonstop8h 20mBrussels Airlines

Deal found 12/9£400

Thu 2/1014:10LHR - ORD

Nonstop9h 10mLufthansa

Wed 8/1014:20ORD - LHR

1 stop10h 55mLufthansa

Deal found 13/9£397

Thu 9/1007:45LHR - ORD

2 stops14h 50mUnited Airlines

Wed 15/1013:55ORD - LHR

1 stop12h 40mUnited Airlines

Deal found 12/9£397

Thu 9/1007:45LHR - ORD

2 stops14h 50mUnited Airlines

Mon 13/1018:00ORD - LHR

1 stop15h 40mUnited Airlines

Deal found 12/9£402

Thu 9/1009:15LHR - ORD

1 stop12h 50mBritish Airways

Wed 15/1020:40ORD - LHR

Nonstop7h 50mBritish Airways

Deal found 13/9£403

Thu 9/1009:40LHR - ORD

1 stop14h 30mVirgin Atlantic

Wed 15/1007:05ORD - LHR

1 stop17h 40mVirgin Atlantic

Deal found 11/9£405

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 14 September 2025.

Fri 13/309:35LHR - ORD

2 stops19h 38mAmerican Airlines

Deal found 12/9£401

Fri 13/208:55LHR - MDW

1 stop13h 30mDelta

Deal found 12/9£401

Thu 30/1019:55LHR - MDW

3 stops45h 42mMultiple Airlines

Deal found 13/9£403

Thu 16/1018:45LHR - ORD

1 stop27h 25mTAP AIR PORTUGAL

Deal found 12/9£403

Wed 26/1109:50LHR - MDW

3 stops30h 02mMultiple Airlines

Deal found 13/9£403

Fri 17/1014:10LHR - ORD

1 stop32h 33mWestJet

Deal found 12/9£404

Mon 1/1209:50LHR - ORD

3 stops16h 39mMultiple Airlines

Deal found 12/9£405

Fri 12/1219:30LHR - ORD

1 stop27h 15mScandinavian Airlines

Deal found 13/9£405

Mon 6/1014:20LHR - MDW

3 stops39h 05mMultiple Airlines

Deal found 12/9£405

Fri 3/1006:00LHR - ORD

1 stop16h 30mTAP AIR PORTUGAL

Deal found 14/9£406

Wed 8/1015:10LHR - MDW

3 stops50h 17mMultiple Airlines

Deal found 12/9£407

Fri 3/1014:10LHR - ORD

Nonstop9h 10mAustrian Airlines

Deal found 13/9£408

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 1/10

07:45-16:35

2 stops14h 50m

Chicago O'Hare Intl

Tue 21/10

13:17-07:15

1 stop11h 58m

£397

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 9/10

07:45-16:35

2 stops14h 50m

Chicago O'Hare Intl

Mon 13/10

05:01-09:40

1 stop22h 39m

£397

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 8/10

07:45-16:35

2 stops14h 50m

Chicago O'Hare Intl

Sun 19/10

14:08-06:30

1 stop10h 22m

£397

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 30/10

06:40-18:45

1 stop17h 05m

Chicago O'Hare Intl

Sun 2/11

19:20-18:50

2 stops17h 30m

£402

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 27/9

11:05-14:10

Nonstop9h 05m

Chicago O'Hare Intl

Mon 6/10

18:00-08:20

Nonstop8h 20m

£414

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 28/10

07:40-12:00

Nonstop9h 20m

Chicago O'Hare Intl

Tue 4/11

15:45-05:55

Nonstop8h 10m

£414

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 6/12

10:25-13:45

Nonstop9h 20m

Chicago O'Hare Intl

Sun 7/12

17:50-07:55

Nonstop8h 05m

£414

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Fri 28/11

06:30-18:18

2 stops17h 48m

Chicago Midway

Sun 30/11

13:47-07:05

1 stop11h 18m

£422

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 23/12

19:30-16:45

1 stop27h 15m

Chicago O'Hare Intl

Thu 1/1

19:20-09:20

1 stop32h 00m

£422

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 6/12

12:35-15:25

Nonstop8h 50m

Chicago O'Hare Intl

Sun 7/12

17:04-09:30

1 stop10h 26m

£422

Flights are sorted by cheapest return flights first.

Deals found on 12/9

Showing 1-10 of 44 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 45 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 17% 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 (42 on average).

What’s the top stopover airport for flights from London Heathrow Airport to Chicago?

Dublin (DUB) – chosen by Cheapflights users on 29% of one-stop itineraries from London Heathrow Airport to Chicago on Cheapflights.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Chicago?

Frankfurt am Main (FRA) is the most affordable one-stop option, with an average return flight price of £368.

What’s the fastest stopover option from London Heathrow Airport to Chicago?

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 11h 48m.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Chicago?

Flights via Atlanta (ATL) offer the fastest connection on this route, with an average stopover time of 1h 21m.

Reviews of airlines servicing Chicago

See what other customers who have flown with Finnair, Aer Lingus, andIcelandair from London Heathrow Airport to Chicago have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Finnair

7.6

Good

1,323 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Aer Lingus

7.2

Good

1,271 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Icelandair

7.0

Good

546 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Lufthansa

6.8

Okay

7,409 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

British Airways

6.7

Okay

7,361 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Related info for your journey

How long is the flight from London Heathrow Airport to Chicago?
There are many flights that can get you from London Heathrow Airport to Chicago in 14h 50m. Fly via United Airlines, Scandinavian Airlines, or Virgin Atlantic to get the fastest option. London Heathrow Airport and Chicago are separated by a distance of 3939 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from London Heathrow Airport to Chicago round-trip?
Currently priced at £341, Icelandair will fly you from London Heathrow Airport to Chicago and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Scandinavian Airlines and TAP AIR PORTUGAL - these airlines can fly you to your destination from £351 and £365, respectively. These flights start at 34% 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 Delta, which is currently one of the cheapest options available, starting at £401. TAP AIR PORTUGAL flights start at £406 while deals on Austrian Airlines start at £408 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 (75%), Austrian Airlines (75%), United Airlines( 75%).
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 £1,443, our data indicates the cheapest price to be £421. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £321.
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 Las Vegas flights

Chicago O'Hare Intl Airport to Atlanta flights

Chicago O'Hare Intl Airport to Denver flights

Chicago O'Hare Intl Airport to Dallas/Fort Worth Airport flights

Chicago O'Hare Intl Airport to Miami flights

Chicago O'Hare Intl Airport to Minneapolis flights

Chicago O'Hare Intl Airport to San Francisco flights

Chicago O'Hare Intl Airport to Boston flights

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Chicago O'Hare Intl Airport to St. Louis flights

Chicago O'Hare Intl Airport to Boston flights

Chicago O'Hare Intl Airport to Los Angeles flights

Chicago O'Hare Intl Airport to Toronto Pearson Intl Airport flights

Chicago O'Hare Intl Airport to Atlanta flights

Top 10 airlines flying from Heathrow to Chicago

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£341	Average£452	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Scandinavian Airlines	Cheapest£351	Average£479	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£365	Average£608	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Aer Lingus	Cheapest£365	Average£570	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Virgin Atlantic	Cheapest£377	Average£534	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Brussels Airlines	Cheapest£390	Average£548	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Lufthansa	Cheapest£393	Average£574	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Austrian Airlines	Cheapest£397	Average£565	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
British Airways	Cheapest£403	Average£556	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£405	Average£539	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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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 £395

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/9. 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 45 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

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 14 September 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 14 September 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 12 September 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 14 September 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 14 September 2025.

What’s the top stopover airport for flights from London Heathrow Airport to Chicago?

Share of one-stop return flights from London Heathrow Airport to Chicago chosen by Cheapflights users in the past 12 months, using the same stopover each way.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Chicago?

Average return fare for one-stop flights from London Heathrow Airport to Chicago, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

What’s the fastest stopover option from London Heathrow Airport to Chicago?

Shortest average travel time for one-stop one-way flights from London Heathrow Airport to Chicago, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Chicago?

Average stopover duration for one-stop one-way flights from London Heathrow Airport to Chicago, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Chicago

See what other customers who have flown with Finnair, Aer Lingus, andIcelandair from London Heathrow Airport to Chicago have to say. You can also see how each airline compares 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.

How long is the flight from London Heathrow Airport to Chicago?

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 14 September 2025.

Top 10 airlines flying from Heathrow to Chicago

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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 Heathrow to Chicago?

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

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

Can Cheapflights notify me if prices for flights from Heathrow to Chicago become cheaper?

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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 14 September 2025.