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$466+ Cheap flights from Heathrow (LHR) to Illinois

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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
Dec 24 — Dec 311
Tue 12/24
Tue 12/31
1 adult, Economy
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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 December 19, 2024.

Round-trip from

$580
(SmartFares)

One-way from

$466
(Kiwi.com)
From London Heathrow to Illinois
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One-way flight from London Heathrow to Illinois
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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 December 19, 2024.

This FlightHub deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/296:40 pmLHR - ORD
1 stop27h 10mScandinavian Airlines
Sun 1/197:10 pmORD - LHR
1 stop20h 30mScandinavian Airlines
Deal found 12/17$637
This Expedia deal was found by Cheapflights users on 12/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3112:25 pmLHR - ORD
1 stop27h 45mIberia
Mon 1/63:59 pmORD - LHR
1 stop24h 11mIberia
Deal found 12/18$652
This Expedia deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/256:00 amLHR - ORD
1 stop15h 30mTAP AIR PORTUGAL
Wed 1/87:15 pmORD - LHR
1 stop14h 15mTAP AIR PORTUGAL
Deal found 12/17$668
This Delta deal was found by Cheapflights users on 12/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/289:10 amLHR - MDW
1 stop14h 34mDelta
Thu 5/82:00 pmMDW - LHR
1 stop16h 15mDelta
Deal found 12/18$686
This StudentUniverse deal was found by Cheapflights users on 12/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3111:55 amLHR - ORD
Nonstop8h 50mFinnair
Mon 1/64:43 pmORD - LHR
1 stop23h 27mFinnair
Deal found 12/18$703
This Delta deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/319:10 amLHR - ORD
1 stop13h 59mDelta
Thu 5/221:50 pmORD - LHR
1 stop10h 55mDelta
Deal found 12/17$710
This American Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/311:10 pmLHR - ORD
1 stop12h 57mAmerican Airlines
Fri 5/2310:55 pmORD - LHR
Nonstop7h 50mAmerican Airlines
Deal found 12/17$748
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/312:30 pmLHR - ORD
1 stop13h 43mUnited Airlines
Tue 5/279:25 pmORD - LHR
Nonstop8h 20mUnited Airlines
Deal found 12/17$753
This KAYAK deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/311:10 pmLHR - ORD
1 stop12h 52mBritish Airways
Thu 5/225:00 pmORD - LHR
Nonstop7h 55mBritish Airways
Deal found 12/17$773
This Austrian Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3110:25 amLHR - ORD
Nonstop9h 25mAustrian Airlines
Tue 5/279:25 pmORD - LHR
Nonstop8h 20mAustrian Airlines
Deal found 12/17$783
This Mytrip deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/256:40 amLHR - ORD
2 stops17h 45mMultiple Airlines
Wed 1/87:05 pmORD - LHR
3 stops20h 35mMultiple Airlines
Deal found 12/17$889
This Expedia deal was found by Cheapflights users on 12/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/319:10 amLHR - MDW
1 stop14h 01mVirgin Atlantic
Mon 1/65:07 pmMDW - LHR
1 stop31h 13mVirgin Atlantic
Deal found 12/18$901

Find flights from Heathrow to Illinois within your budget

Customize 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 2,558,603 searches. Data last updated December 19, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 1/16

1:55 pm-3:50 pm

2 stops31h 55m

Chicago O'Hare Intl

Fri 1/31

7:40 pm-6:30 pm

2 stops16h 50m

$580

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 2/3

9:10 am-5:43 pm

1 stop14h 33m

Chicago Midway

Mon 2/17

2:08 pm-6:50 am

1 stop10h 42m

$581

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Tue 1/21

12:20 pm-6:14 pm

1 stop11h 54m

Chicago Midway

Tue 1/28

2:08 pm-6:50 am

1 stop10h 42m

$583

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 1/14

7:30 am-3:15 pm

1 stop13h 45m

Chicago O'Hare Intl

Sat 1/18

8:40 pm-6:30 am

1 stop27h 50m

$584

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 1/15

9:55 am-3:05 pm

2 stops35h 10m

Chicago O'Hare Intl

Wed 1/22

4:25 pm-8:05 pm

2 stops21h 40m

$588

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 3/25

10:15 am-2:05 pm

Nonstop8h 50m

Chicago O'Hare Intl

Fri 3/28

6:30 pm-12:00 pm

1 stop12h 30m

$592

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 1/16

12:15 pm-5:20 pm

1 stop11h 05m

Chicago O'Hare Intl

Wed 1/29

6:30 pm-7:30 pm

1 stop19h 00m

$594

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Tue 1/14

9:10 am-5:47 pm

1 stop14h 37m

Chicago Midway

Sun 1/19

9:34 am-6:50 am

1 stop15h 16m

$600

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 1/28

11:55 am-2:45 pm

Nonstop8h 50m

Chicago O'Hare Intl

Sun 2/9

6:35 pm-8:15 am

Nonstop7h 40m

$601

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 1/10

8:40 am-4:52 pm

1 stop14h 12m

Chicago O'Hare Intl

Mon 1/13

6:35 pm-8:15 am

Nonstop7h 40m

$614

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/19

Showing 1-10 of 57 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 round-trip 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Illinois (average of $232). Flying from London Heathrow Airport to Illinois in June is currently the most expensive (average of $308). 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 December 19, 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 December 19, 2024.

The most flights from LHR to USIL are scheduled on a Monday (38 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (33 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 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 December 19, 2024.
To help decide which airline to fly from London to Illinois, see what other customers have to say about United Airlines, Austrian Airlines and Air Canada. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,600 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

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
8,600 reviews
Delta
8.0
Very good
8,600 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

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
1,349 reviews
Delta
8.0
Very good
8,600 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

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
1,285 reviews
Delta
8.0
Very good
8,600 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

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
8,600 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Reviews

1 / 10

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

Virgin Atlantic
7.5
Good
668 reviews
Delta
8.0
Very good
8,600 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

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?

    The cheapest airlines for a one-way flight from London Heathrow Airport to Illinois are Aer Lingus ($482), Icelandair ($489), and TAP AIR PORTUGAL ($498).

  • 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?

    No one likes to see their flight delayed. When booking a flight from London Heathrow Airport to Illinois consider choosing SWISS (89%), Air Canada (86%) or Austrian Airlines (86%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from London Heathrow Airport to Illinois? While on average our users pay $1,532, our data indicates the cheapest price to be $623. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around $483.

  • 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 vacation 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Illinois (average of $232). Flying from London Heathrow Airport to Illinois in June is currently the most expensive (average of $308). 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.

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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.
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
London City to John F Kennedy Intl flights
Gatwick to John F Kennedy Intl flights
Heathrow to LaGuardia flights
Gatwick to Newark flights
London City to Newark flights
Heathrow to Los Angeles flights
Luton to John F Kennedy Intl flights
Luton to Newark flights
Heathrow to Miami flights
Stansted to John F Kennedy Intl flights
Heathrow to Boston flights
Gatwick to LaGuardia flights
Heathrow to Orlando flights
Heathrow to Dulles Intl flights
Stansted to Newark flights
Heathrow to Las Vegas flights
Heathrow to Dallas/Fort Worth flights
Heathrow to San Francisco flights
Gatwick to Orlando flights
Heathrow to O'Hare Intl flights
Heathrow to Seattle flights
London City to Los Angeles flights
Luton to Stewart flights
Heathrow to Baltimore flights
Gatwick to Los Angeles flights
Heathrow to Hobby flights
London City to Miami flights
Gatwick to Boston flights
Heathrow to Ontario flights
London City to Boston flights
Heathrow to Atlanta flights
Heathrow to Tampa flights
Heathrow to George Bush Intcntl flights
Heathrow to Nashville flights
Stansted to Boston flights
Gatwick to Miami flights
Gatwick to Dulles Intl flights
London City to Dulles Intl flights
Gatwick to San Francisco flights
Heathrow to Austin flights
Heathrow to Denver flights
London City to Las Vegas flights
Heathrow to Charlotte flights
Gatwick to O'Hare Intl flights
Heathrow to Reagan-National flights
Heathrow to Philadelphia 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 2,558,603 searches. Data last updated December 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$462Average$645FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$483Average$729FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$501Average$672FlexibilityNo cancel feeOn-time76%
FinnairCheapest$535Average$809FlexibilityNo cancel feeOn-time76%
IberiaCheapest$555Average$775FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$556Average$773FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$558Average$798FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$579Average$734FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$584Average$1,162FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$646Average$1,069FlexibilityNo cancel feeOn-time76%
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