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Cheap flights from London Heathrow Airport to Illinois from £368

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 28/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
4 Jan — 11 Jan1
1 adult

Cheap flight deals from Heathrow to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 30 December 2024.

Round-trip from

£454

One-way from

£368
Scandinavian Airlines
  • Scandinavian Airlines
  • 27/1-10/2
  • 4 total stops
  • 50h 03m total
  • London to Illinois
Search Deals
28/1
  • 28/1
  • 3 total stops
  • 39h 27m total
  • London to Illinois
Search Deals

Find flight deals from Heathrow to Illinois

Cheapest flights from Heathrow to Illinois
Explore the most affordable flight options available from Heathrow to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 December 2024.

Mon 30/1206:40LHR - ORD
2 stops15h 10mScandinavian Airlines
Sat 18/119:10ORD - LHR
1 stop14h 50mScandinavian Airlines
Deal found 29/12£579
Tue 31/1213:55LHR - ORD
2 stops33h 25mMultiple Airlines
Tue 14/118:30ORD - LHR
1 stop10h 20mMultiple Airlines
Deal found 29/12£767
Tue 31/1212:05LHR - ORD
1 stop32h 00mAustrian Airlines
Tue 14/121:10ORD - LHR
Nonstop8h 05mAustrian Airlines
Deal found 29/12£782
Tue 31/1208:55LHR - ORD
2 stops17h 00mAir Canada
Tue 14/111:20ORD - LHR
2 stops13h 50mAir Canada
Deal found 29/12£836
Mon 30/1209:10LHR - ORD
1 stop13h 59mVirgin Atlantic
Sat 18/117:20ORD - LHR
1 stop17h 15mVirgin Atlantic
Deal found 29/12£843
Tue 31/1211:45LHR - ORD
1 stop13h 35mFinnair
Fri 3/122:00ORD - LHR
Nonstop7h 40mFinnair
Deal found 29/12£855
Tue 31/1214:30LHR - MDW
1 stop13h 36mDelta
Tue 7/113:26MDW - LHR
1 stop11h 39mDelta
Deal found 30/12£914
Sun 29/1206:00LHR - ORD
1 stop15h 30mTAP AIR PORTUGAL
Thu 2/108:42ORD - LHR
2 stops21h 58mTAP AIR PORTUGAL
Deal found 28/12£970
Tue 31/1209:10LHR - MDW
1 stop14h 01mKLM
Mon 6/114:08MDW - LHR
1 stop10h 42mKLM
Deal found 30/12£1,162
Tue 31/1210:25LHR - ORD
Nonstop9h 25mLufthansa
Fri 3/121:10ORD - LHR
Nonstop8h 05mLufthansa
Deal found 29/12£1,223
Sun 29/1213:35LHR - ORD
Nonstop9h 25mUnited Airlines
Sat 4/118:28ORD - LHR
1 stop30h 02mUnited Airlines
Deal found 29/12£1,225
Mon 30/1222:35LHR - ORD
1 stop26h 00mTurkish Airlines
Fri 3/117:50ORD - LHR
Nonstop8h 05mTurkish Airlines
Deal found 30/12£1,322

Find flights from Heathrow to Illinois within your budget

Customise your flight search to find flights from Heathrow to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 30 December 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 27/1

19:30-22:23

2 stops32h 53m

Chicago O'Hare Intl

Mon 10/2

19:40-18:50

2 stops17h 10m

£454

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 2/2

10:25-13:50

Nonstop9h 25m

Chicago O'Hare Intl

Mon 17/2

17:50-07:55

Nonstop8h 05m

£455

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 20/4

20:05-12:10

1 stop22h 05m

Chicago O'Hare Intl

Mon 28/4

18:35-16:25

1 stop15h 50m

£456

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 20/1

06:30-14:30

1 stop14h 00m

Chicago O'Hare Intl

Wed 29/1

18:35-08:15

Nonstop7h 40m

£457

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 18/2

08:50-19:15

1 stop16h 25m

Chicago O'Hare Intl

Thu 20/2

21:00-13:25

1 stop10h 25m

£458

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 20/1

11:55-14:45

Nonstop8h 50m

Chicago O'Hare Intl

Mon 3/2

16:22-08:35

1 stop10h 13m

£459

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 10/1

11:10-19:37

1 stop14h 27m

Chicago O'Hare Intl

Wed 22/1

18:08-11:05

1 stop10h 57m

£460

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 20/1

09:10-17:47

1 stop14h 37m

Chicago Midway

Mon 3/2

14:08-06:50

1 stop10h 42m

£460

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 27/1

15:00-10:54

1 stop25h 54m

Chicago O'Hare Intl

Tue 11/2

14:01-07:10

1 stop11h 09m

£461

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Tue 14/1

06:30-16:21

2 stops15h 51m

Chicago Midway

Wed 29/1

10:57-06:50

2 stops13h 53m

£462

Flights are sorted by cheapest return flights first.

Deals found on 30/12

Showing 1-10 of 58 results
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Best time to book a flight from Heathrow to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois 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 Illinois

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

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

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Illinois (average of £595). Flying from London Heathrow Airport to Illinois 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 IL?

Find hourly flight availability from Heathrow to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 December 2024.

When flying from London Heathrow Airport to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from London Heathrow Airport to Illinois

Explore weekly flight availability from Heathrow to Illinois. 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 30 December 2024.

The most flights from LHR to USIL are scheduled on a Saturday (39 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (38 on average).

Rainfall in Illinois by month

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

In terms of precipitation, rainfall in Illinois 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 Illinois when rainfall is around 43.0 mm.

Temperature in Illinois by month

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

If weather is an important factor for your trip to Illinois, 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 Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 30 December 2024.
Read reviews from past customers who have flown Delta, United Airlines and TAP AIR PORTUGAL from London to Illinois. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
8,540 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Food

7.3

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

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

Delta
8.0
Very Good
8,540 reviews
Delta
8.0
Very Good
8,540 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Food

7.3

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

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

KLM
7.8
Good
1,339 reviews
Delta
8.0
Very Good
8,540 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Food

7.3

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

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

Finnair
7.7
Good
1,282 reviews
Delta
8.0
Very Good
8,540 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Food

7.3

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

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

Austrian Airlines
7.6
Good
788 reviews
Delta
8.0
Very Good
8,540 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Food

7.3

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

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

SWISS
7.5
Good
1,595 reviews
Delta
8.0
Very Good
8,540 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.6

Food

7.3

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

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

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Illinois. 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 to fly from London Heathrow Airport to Illinois one-way?

    One-way options have recently been found by users for as low as £375 on Icelandair. Other airlines that offer cheap prices include Aer Lingus from £395 and WestJet from £403 one-way.

  • What are the most popular routes from London Heathrow Airport to Illinois?

    The most popular flight routes from London Heathrow Airport to Illinois are London Heathrow - Chicago O'Hare Intl, London Heathrow - Chicago Midway and London Heathrow - Lambert-St Louis.

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

    Before booking your flight to Illinois from London Heathrow Airport, check out the most reliable airlines to get you to your destination on time: SWISS (89%), Air Canada (86%), Austrian Airlines( 86%).

  • What are the cheapest flights from London Heathrow Airport to Illinois?

    Looking at all options, your cheapest flight can be booked for £469. While the most popular route (London Heathrow - Chicago O'Hare Intl) can be booked for £326 on average our data indicates £1,402 when flying from London Heathrow Airport to Illinois.

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

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

  • How can I find direct flights from Heathrow to Illinois?

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

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

    Yes. Cheapflights offers flight deals from Heathrow to Illinois 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 Illinois?

    Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Illinois (average of £595). Flying from London Heathrow Airport to Illinois 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

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Alternative routes for Heathrow to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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London City to Las Vegas flights
London City to Orlando flights
Heathrow to Charlotte flights
Gatwick to San Francisco flights
Gatwick to Miami flights
London City to San Francisco flights
Heathrow to Atlanta flights
Gatwick to Dulles Intl flights
Heathrow to Denver flights
Heathrow to Austin flights
Gatwick to Seattle flights
London City to Dulles Intl flights
Gatwick to Boston flights
Gatwick to Stewart flights
Heathrow to Philadelphia flights
Heathrow to Reagan-National flights

Top 10 airlines flying from Heathrow to Illinois

Discover the top 10 airlines that operate flights from Heathrow to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 30 December 2024.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£382Average£530FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£385Average£549FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£387Average£563FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£409Average£612FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£433Average£770FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£443Average£586FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Aer LingusCheapest£452Average£600FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
FinnairCheapest£472Average£709FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£477Average£648FlexibilityNo cancel feeOn-time77%
Search Iberia flights
American AirlinesCheapest£480Average£652FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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

Cheapflights helps you search for flights from Heathrow to Illinois via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Heathrow to Illinois for you. Better yet — we are completely free to use.

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

Yes! Cheapflights helps users easily find flights from Heathrow to Illinois with no change fees.

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

Of course! You can now track prices for flights from Heathrow to Illinois and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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