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 15h 40m. Fly via Scandinavian Airlines, Delta, 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 £343, 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 Virgin Atlantic and Scandinavian Airlines - these airlines can fly you to your destination from £348 and £360, respectively. These flights start at 35% 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 £391. Delta flights start at £391 while deals on British Airways start at £393 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 £1,271, our data indicates the cheapest price to be £404. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £376.

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: Malaysia Airlines (80%), Air Canada (79%), Austrian Airlines( 79%).

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 British Airways, Lufthansa or Finnair as they are the most popular for this route.

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.

£391+ Cheap Flights from London Heathrow Airport to Chicago

Cheapflights Tip: The best prices from London Heathrow to Chicago are usually found in February or September, booked 56 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Find flight deals from Heathrow to Chicago

Enter your travel dates to find the best prices.

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 October 2025.

Fri 7/1107:05LHR - ORD

2 stops15h 40mScandinavian Airlines

Fri 28/1119:20ORD - LHR

2 stops17h 10mScandinavian Airlines

Deal found 13/10£398

Mon 17/1110:20LHR - ORD

1 stop12h 25mScandinavian Airlines

Mon 1/1219:20ORD - LHR

1 stop16h 20mScandinavian Airlines

Deal found 13/10£399

Thu 30/1006:40LHR - ORD

1 stop17h 05mScandinavian Airlines

Mon 10/1119:20ORD - LHR

1 stop20h 20mScandinavian Airlines

Deal found 13/10£400

Fri 31/1019:30LHR - ORD

1 stop27h 15mScandinavian Airlines

Fri 7/1119:20ORD - LHR

1 stop14h 40mScandinavian Airlines

Deal found 13/10£401

Fri 7/1110:20LHR - ORD

1 stop12h 25mScandinavian Airlines

Sat 15/1119:20ORD - LHR

1 stop17h 10mScandinavian Airlines

Deal found 14/10£402

Thu 6/1118:30LHR - ORD

1 stop26h 55mTAP AIR PORTUGAL

Wed 12/1119:10ORD - LHR

1 stop16h 20mTAP AIR PORTUGAL

Deal found 14/10£403

Mon 3/1106:40LHR - ORD

1 stop16h 05mScandinavian Airlines

Sun 9/1119:20ORD - LHR

1 stop20h 20mScandinavian Airlines

Deal found 14/10£403

Mon 3/1106:40LHR - ORD

1 stop16h 05mScandinavian Airlines

Fri 7/1119:20ORD - LHR

1 stop14h 40mScandinavian Airlines

Deal found 13/10£404

Wed 12/1119:30LHR - ORD

1 stop27h 15mScandinavian Airlines

Wed 19/1119:20ORD - LHR

2 stops15h 05mScandinavian Airlines

Deal found 14/10£406

Thu 30/1007:05LHR - ORD

2 stops16h 40mScandinavian Airlines

Thu 6/1119:20ORD - LHR

1 stop20h 20mScandinavian Airlines

Deal found 14/10£406

Tue 25/1111:45LHR - MDW

2 stops17h 55mVirgin Atlantic

Wed 3/1209:34MDW - LHR

2 stops16h 16mVirgin Atlantic

Deal found 14/10£498

Mon 17/1106:30LHR - MDW

2 stops17h 38mDelta

Mon 1/1210:47MDW - LHR

1 stop13h 38mDelta

Deal found 15/10£518

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 October 2025.

Thu 27/1107:05LHR - ORD

2 stops15h 40mScandinavian Airlines

Sat 6/1219:20ORD - LHR

2 stops17h 30mScandinavian Airlines

Deal found 13/10£422

Sat 6/1218:00LHR - ORD

1 stop25h 01mUnited Airlines

Sun 7/1215:45ORD - LHR

Nonstop8h 10mUnited Airlines

Deal found 14/10£442

Mon 24/1120:35LHR - ORD

1 stop26h 45mIcelandair

Mon 1/1218:30ORD - LHR

1 stop10h 20mIcelandair

Deal found 13/10£452

Tue 25/1106:30LHR - MDW

2 stops16h 08mDelta

Wed 10/1213:50MDW - LHR

1 stop11h 15mDelta

Deal found 14/10£518

Mon 10/1110:00LHR - MDW

2 stops19h 40mVirgin Atlantic

Mon 24/1109:34MDW - LHR

2 stops15h 16mVirgin Atlantic

Deal found 13/10£521

Mon 10/1107:05LHR - ORD

2 stops15h 40mScandinavian Airlines

Mon 24/1119:20ORD - LHR

2 stops17h 30mScandinavian Airlines

Deal found 13/10£422

Mon 17/1109:00LHR - ORD

1 stop13h 20mUnited Airlines

Mon 1/1217:50ORD - LHR

Nonstop8h 05mUnited Airlines

Deal found 14/10£461

Thu 27/1107:05LHR - ORD

2 stops15h 40mScandinavian Airlines

Thu 4/1219:20ORD - LHR

2 stops17h 30mScandinavian Airlines

Deal found 13/10£423

Mon 10/1109:00LHR - ORD

1 stop13h 20mUnited Airlines

Mon 24/1117:50ORD - LHR

Nonstop8h 05mUnited Airlines

Deal found 13/10£464

Fri 31/1007:05LHR - ORD

2 stops15h 40mScandinavian Airlines

Fri 7/1119:20ORD - LHR

2 stops17h 10mScandinavian Airlines

Deal found 14/10£424

Tue 25/1108:40LHR - MDW

2 stops15h 38mDelta

Wed 3/1213:14MDW - LHR

2 stops14h 06mDelta

Deal found 13/10£521

Mon 10/1111:45LHR - MDW

2 stops17h 55mVirgin Atlantic

Mon 17/1113:15MDW - LHR

2 stops14h 05mVirgin Atlantic

Deal found 13/10£521

Sat 6/1210:20LHR - ORD

1 stop12h 25mScandinavian Airlines

Sun 7/1219:20ORD - LHR

1 stop17h 10mScandinavian Airlines

Deal found 14/10£425

Tue 18/1108:40LHR - MDW

2 stops15h 38mDelta

Wed 26/1112:47MDW - LHR

1 stop11h 38mDelta

Deal found 13/10£521

Mon 12/108:55LHR - MDW

2 stops18h 51mVirgin Atlantic

Tue 27/113:00MDW - LHR

2 stops12h 50mVirgin Atlantic

Deal found 14/10£529

Tue 20/108:40LHR - MDW

2 stops15h 28mDelta

Wed 4/214:00MDW - LHR

1 stop11h 05mDelta

Deal found 14/10£524

Tue 25/1119:50LHR - ORD

2 stops26h 55mScandinavian Airlines

Wed 3/1219:20ORD - LHR

2 stops17h 30mScandinavian Airlines

Deal found 13/10£438

Wed 31/1209:40LHR - MDW

2 stops18h 42mVirgin Atlantic

Thu 15/114:00MDW - LHR

1 stop11h 05mVirgin Atlantic

Deal found 14/10£532

Mon 17/1113:05LHR - MDW

2 stops16h 35mVirgin Atlantic

Mon 1/1209:34MDW - LHR

2 stops15h 16mVirgin Atlantic

Deal found 14/10£533

Thu 30/1010:20LHR - ORD

1 stop13h 25mScandinavian Airlines

Sun 2/1119:20ORD - LHR

1 stop16h 20mScandinavian Airlines

Deal found 14/10£462

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 October 2025.

Wed 12/1107:40LHR - ORD

Nonstop9h 20mLufthansa

Wed 3/1215:45ORD - LHR

Nonstop8h 10mLufthansa

Deal found 13/10£467

Wed 31/1213:35LHR - ORD

Nonstop9h 25mBrussels Airlines

Thu 15/115:45ORD - LHR

Nonstop8h 10mBrussels Airlines

Deal found 13/10£470

Tue 11/1110:25LHR - ORD

Nonstop9h 20mAustrian Airlines

Mon 17/1121:05ORD - LHR

Nonstop8h 10mAustrian Airlines

Deal found 13/10£472

Mon 17/1107:55LHR - ORD

Nonstop9h 20mLufthansa

Mon 1/1215:45ORD - LHR

Nonstop8h 10mLufthansa

Deal found 14/10£476

Mon 10/1110:25LHR - ORD

Nonstop9h 20mAustrian Airlines

Mon 24/1121:05ORD - LHR

Nonstop8h 10mAustrian Airlines

Deal found 12/10£476

Mon 17/1113:35LHR - ORD

Nonstop9h 25mAustrian Airlines

Mon 1/1217:50ORD - LHR

Nonstop8h 05mAustrian Airlines

Deal found 14/10£478

Mon 10/1113:35LHR - ORD

Nonstop9h 25mAustrian Airlines

Mon 17/1117:50ORD - LHR

Nonstop8h 05mAustrian Airlines

Deal found 13/10£479

Wed 19/1110:25LHR - ORD

Nonstop9h 20mAustrian Airlines

Tue 2/1221:05ORD - LHR

Nonstop8h 10mAustrian Airlines

Deal found 13/10£479

Mon 17/1110:25LHR - ORD

Nonstop9h 20mAustrian Airlines

Wed 3/1217:50ORD - LHR

Nonstop8h 05mAustrian Airlines

Deal found 13/10£480

Wed 19/1110:25LHR - ORD

Nonstop9h 20mMultiple Airlines

Mon 1/1217:50ORD - LHR

Nonstop8h 05mMultiple Airlines

Deal found 13/10£482

Mon 12/110:25LHR - ORD

Nonstop9h 20mAustrian Airlines

Mon 19/117:50ORD - LHR

Nonstop8h 05mAustrian Airlines

Deal found 12/10£482

Tue 25/1112:35LHR - ORD

Nonstop8h 50mBritish Airways

Tue 2/1217:10ORD - LHR

Nonstop7h 45mBritish Airways

Deal found 14/10£483

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

Mon 20/1007:05LHR - ORD

2 stops15h 05mScandinavian Airlines

Wed 29/1023:10ORD - LHR

1 stop14h 20mScandinavian Airlines

Deal found 14/10£567

Thu 23/1007:40LHR - ORD

1 stop12h 20mAer Lingus

Thu 20/1115:50ORD - LHR

1 stop11h 15mAer Lingus

Deal found 14/10£544

Sat 25/1007:40LHR - ORD

1 stop17h 19mAer Lingus

Thu 30/1016:50ORD - LHR

1 stop20h 00mAer Lingus

Deal found 14/10£574

Mon 10/1108:40LHR - MDW

2 stops15h 38mDelta

Mon 24/1112:47MDW - LHR

1 stop11h 38mDelta

Deal found 13/10£521

Mon 10/1111:05LHR - MDW

1 stop13h 13mKLM

Mon 17/1113:47MDW - LHR

1 stop11h 18mKLM

Deal found 13/10£534

Mon 10/1111:05LHR - MDW

1 stop13h 13mKLM

Mon 24/1113:47MDW - LHR

1 stop11h 18mKLM

Deal found 13/10£535

Tue 11/1111:05LHR - MDW

1 stop13h 13mVirgin Atlantic

Tue 18/1112:47MDW - LHR

1 stop11h 38mVirgin Atlantic

Deal found 12/10£510

Mon 17/1106:30LHR - MDW

2 stops17h 38mDelta

Mon 1/1212:47MDW - LHR

1 stop14h 13mDelta

Deal found 14/10£520

Mon 17/1111:05LHR - MDW

1 stop13h 13mKLM

Mon 1/1213:47MDW - LHR

1 stop11h 18mKLM

Deal found 14/10£533

Tue 25/1111:45LHR - MDW

2 stops17h 55mVirgin Atlantic

Wed 3/1209:34MDW - LHR

2 stops16h 16mVirgin Atlantic

Deal found 14/10£498

Wed 26/1110:00LHR - MDW

2 stops19h 40mVirgin Atlantic

Wed 3/1213:14MDW - LHR

2 stops12h 26mVirgin Atlantic

Deal found 12/10£514

Thu 27/1110:00LHR - MDW

2 stops19h 40mVirgin Atlantic

Thu 4/1209:59MDW - LHR

1 stop15h 06mVirgin Atlantic

Deal found 12/10£529

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 October 2025.

Fri 13/206:30LHR - ORD

2 stops16h 07mDelta

Deal found 13/10£391

Fri 13/208:40LHR - MDW

2 stops15h 28mDelta

Deal found 13/10£391

Sun 23/1112:25LHR - ORD

2 stops28h 10mMultiple Airlines

Deal found 13/10£392

Thu 11/1214:10LHR - ORD

Nonstop8h 50mBritish Airways

Deal found 14/10£393

Sun 22/206:20LHR - MDW

2 stops18h 14mDelta

Deal found 14/10£394

Sun 22/206:20LHR - ORD

2 stops17h 50mDelta

Deal found 13/10£394

Wed 12/1108:50LHR - ORD

1 stop15h 05mAer Lingus

Deal found 13/10£395

Fri 16/115:45LHR - ORD

Nonstop9h 00mIberia

Deal found 14/10£396

Mon 15/1211:05LHR - MDW

1 stop13h 13mVirgin Atlantic

Deal found 13/10£396

Sat 11/415:30LHR - ORD

Nonstop8h 45mFinnair

Deal found 12/10£397

Sat 15/1106:00LHR - ORD

3 stops23h 29mMultiple Airlines

Deal found 14/10£397

Wed 12/1108:15LHR - ORD

3 stops35h 11mMultiple Airlines

Deal found 13/10£398

Cheap flight deals from Heathrow to Chicago

Round-trip from	£397
One-way from	£391
Popular in	July
Cheapest in	February
Average price	£570
Good round-trip deal	£497 or less
Good one-way deal	£472 or less

Scandinavian Airlines
7/11-28/11
4 total stops
70h 15m total
London to Chicago

Search Deals

Delta
13/2
2 total stops
16h 07m total
London to Chicago

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (£49 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 October 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

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 27/11

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Sat 6/12

19:20-18:50

2 stops17h 30m

£422

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 10/11

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Mon 24/11

19:20-18:50

2 stops17h 30m

£422

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 27/11

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Thu 4/12

19:20-18:50

2 stops17h 30m

£423

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 31/10

07:05-17:45

2 stops15h 40m

Chicago O'Hare Intl

Fri 7/11

19:20-18:30

2 stops17h 10m

£424

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 6/12

10:20-16:45

1 stop12h 25m

Chicago O'Hare Intl

Sun 7/12

19:20-18:30

1 stop17h 10m

£425

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 25/11

19:50-16:45

2 stops26h 55m

Chicago O'Hare Intl

Wed 3/12

19:20-18:50

2 stops17h 30m

£438

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 6/12

18:00-13:01

1 stop25h 01m

Chicago O'Hare Intl

Sun 7/12

15:45-05:55

Nonstop8h 10m

£442

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 24/11

20:35-17:20

1 stop26h 45m

Chicago O'Hare Intl

Mon 1/12

18:30-10:50

1 stop10h 20m

£452

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 17/11

09:00-16:20

1 stop13h 20m

Chicago O'Hare Intl

Mon 1/12

17:50-07:55

Nonstop8h 05m

£461

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 30/10

10:20-18:45

1 stop13h 25m

Chicago O'Hare Intl

Sun 2/11

19:20-17:40

1 stop16h 20m

£462

Flights are sorted by cheapest return flights first.

Deals found on 14/10

Showing 1-10 of 38 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of £359). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of £506). 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 afternoon. If you’re flexible enough to do this you can expect to save up to 12% on your trip compared to booking a flight at midday.

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 afternoons 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 Wednesday, which is when the least amount of flights are scheduled (47 on average).

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

Reykjavik (KEF) – chosen by Cheapflights users on 31% 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 £375.

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 40m.

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

1,332 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

1,332 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Aer Lingus

7.2

Good

1,337 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Icelandair

7.0

Good

556 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Lufthansa

6.8

Okay

7,489 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

British Airways

6.7

Okay

7,457 reviews

Finnair

7.6

Good

1,332 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 15h 40m. Fly via Scandinavian Airlines, Delta, 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 £343, 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 Virgin Atlantic and Scandinavian Airlines - these airlines can fly you to your destination from £348 and £360, respectively. These flights start at 35% 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 £391. Delta flights start at £391 while deals on British Airways start at £393 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: Malaysia Airlines (80%), Air Canada (79%), Austrian Airlines( 79%).
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 £1,271, our data indicates the cheapest price to be £404. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £376.
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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of £359). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of £506). 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

Other flights to Chicago

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Chicago O'Hare Intl Airport to New York John F Kennedy Intl Airport flights

Chicago O'Hare Intl Airport to Atlanta flights

Chicago O'Hare Intl Airport to Newark Airport flights

Chicago O'Hare Intl Airport to Las Vegas flights

Chicago O'Hare Intl Airport to St. Louis flights

Chicago O'Hare Intl Airport to Miami flights

Chicago O'Hare Intl Airport to Minneapolis flights

Chicago O'Hare Intl Airport to Miami flights

Chicago O'Hare Intl Airport to Los Angeles flights

Chicago O'Hare Intl Airport to Seattle flights

Chicago O'Hare Intl Airport to Boston flights

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

Chicago O'Hare Intl Airport to San Francisco flights

Chicago O'Hare Intl Airport to Lisbon flights

Chicago O'Hare Intl Airport to Minneapolis flights

Top 10 airlines flying from Heathrow to Chicago

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£343	Average£457	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Virgin Atlantic	Cheapest£348	Average£555	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Scandinavian Airlines	Cheapest£360	Average£501	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Aer Lingus	Cheapest£371	Average£581	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
TAP AIR PORTUGAL	Cheapest£372	Average£618	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Brussels Airlines	Cheapest£389	Average£546	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Lufthansa	Cheapest£400	Average£580	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Austrian Airlines	Cheapest£405	Average£594	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
British Airways	Cheapest£408	Average£573	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£412	Average£546	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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Cheap flights from London Heathrow Airport to Chicago from £391

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 13/2. 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 September, booked 56 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

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 October 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 October 2025.

Cheap flight deals from Heathrow to Chicago

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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 10 October 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 October 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 October 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?

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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 15 October 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 15 October 2025.