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$531+ 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 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
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 November 21, 2024.

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 November 21, 2024.

This Gotogate deal was found by Cheapflights users on 11/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/58:50 amLHR - ORD
1 stop11h 10mAer Lingus
Sun 12/153:55 pmORD - LHR
1 stop10h 10mAer Lingus
Deal found 11/20$574
This Cheapflightsfares deal was found by Cheapflights users on 11/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/116:00 amLHR - ORD
1 stop15h 30mTAP AIR PORTUGAL
Wed 1/157:15 pmORD - LHR
1 stop21h 25mTAP AIR PORTUGAL
Deal found 11/20$587
This Scandinavian Airlines deal was found by Cheapflights users on 11/20. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/76:40 amLHR - ORD
2 stops21h 03mScandinavian Airlines
Sat 12/147:10 pmORD - LHR
1 stop14h 50mScandinavian Airlines
Deal found 11/20$599
This Gotogate deal was found by Cheapflights users on 11/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/118:40 pmLHR - ORD
1 stop26h 40mIcelandair
Tue 12/176:30 pmORD - LHR
1 stop19h 00mIcelandair
Deal found 11/20$603
This American Airlines deal was found by Cheapflights users on 11/20. 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.
Mon 12/309:30 amLHR - ORD
1 stop16h 14mAmerican Airlines
Wed 1/293:00 pmORD - LHR
1 stop13h 15mAmerican Airlines
Deal found 11/20$608
This The Travel House deal was found by Cheapflights users on 11/20. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/266:50 amLHR - ORD
1 stop11h 25mLufthansa
Sat 11/308:25 pmORD - LHR
1 stop28h 05mLufthansa
Deal found 11/20$612
This Mytrip deal was found by Cheapflights users on 11/19. 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.
Tue 12/39:55 amLHR - ORD
2 stops34h 10mMultiple Airlines
Tue 12/103:35 pmORD - LHR
2 stops22h 30mMultiple Airlines
Deal found 11/19$613
This Delta deal was found by Cheapflights users on 11/20. 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.
Wed 12/118:40 amLHR - MDW
2 stops15h 52mDelta
Wed 1/1510:57 amMDW - LHR
1 stop13h 23mDelta
Deal found 11/20$614
This United Airlines deal was found by Cheapflights users on 11/19. 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.
Sat 11/232:30 pmLHR - ORD
1 stop26h 24mUnited Airlines
Mon 11/2510:51 amORD - LHR
1 stop13h 29mUnited Airlines
Deal found 11/19$626
This The Travel House deal was found by Cheapflights users on 11/20. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/254:00 pmLHR - ORD
1 stop21h 55mFinnair
Thu 1/163:00 pmORD - LHR
1 stop13h 15mFinnair
Deal found 11/20$649
This Delta deal was found by Cheapflights users on 11/20. 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.
Wed 12/116:30 amLHR - ORD
2 stops16h 36mDelta
Wed 12/1811:59 amORD - LHR
1 stop12h 21mDelta
Deal found 11/20$650
This Expedia deal was found by Cheapflights users on 11/19. 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 12/37:25 pmLHR - ORD
1 stop24h 40mAustrian Airlines
Tue 12/109:10 pmORD - LHR
Nonstop8h 05mAustrian Airlines
Deal found 11/19$670

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 2,629,791 searches. Data last updated November 21, 2024.

Fly from

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Fly to

Any airport

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 1/13

6:40 am-3:50 pm

1 stop15h 10m

Chicago O'Hare Intl

Mon 1/27

7:10 pm-5:00 pm

2 stops15h 50m

$563

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 3/18

6:10 am-3:30 pm

1 stop14h 20m

Chicago O'Hare Intl

Mon 3/24

3:00 pm-10:15 am

1 stop14h 15m

$570

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 12/5

8:50 am-2:00 pm

1 stop11h 10m

Chicago O'Hare Intl

Sun 12/15

3:55 pm-8:05 am

1 stop10h 10m

$574

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 2/17

6:30 am-6:14 pm

2 stops17h 44m

Chicago Midway

Thu 2/27

2:08 pm-6:50 am

1 stop10h 42m

$574

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/23

6:00 am-4:10 pm

1 stop16h 10m

Chicago O'Hare Intl

Wed 4/30

6:00 pm-10:00 pm

1 stop22h 00m

$585

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 2/12

11:45 am-7:20 pm

1 stop13h 35m

Chicago O'Hare Intl

Tue 2/18

6:25 pm-8:15 am

Nonstop7h 50m

$596

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 12/11

8:40 pm-5:20 pm

1 stop26h 40m

Chicago O'Hare Intl

Tue 12/17

6:30 pm-7:30 pm

1 stop19h 00m

$603

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 12/5

3:45 pm-6:45 pm

Nonstop9h 00m

Chicago O'Hare Intl

Sun 12/8

1:15 pm-6:20 am

1 stop35h 05m

$606

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 2/16

6:30 am-4:13 pm

2 stops15h 43m

Chicago O'Hare Intl

Wed 2/26

2:03 pm-6:25 am

1 stop10h 22m

$612

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 2/12

11:00 am-1:55 pm

Nonstop8h 55m

Chicago O'Hare Intl

Tue 2/18

5:00 pm-6:50 am

Nonstop7h 50m

$616

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 56 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 November 21, 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 November 21, 2024.

The most flights from LHR to USIL are scheduled on a Monday (36 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (30 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 November 21, 2024.
To help decide which airline to fly from London to Illinois, see what other customers have to say about Scandinavian Airlines, Aer Lingus and Finnair. 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
8,759 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

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
8,759 reviews
Delta
8.0
Very good
8,759 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

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
1,350 reviews
Delta
8.0
Very good
8,759 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

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
1,300 reviews
Delta
8.0
Very good
8,759 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

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
805 reviews
Delta
8.0
Very good
8,759 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 10

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

SWISS
7.6
Good
1,637 reviews
Delta
8.0
Very good
8,759 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

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 TAP AIR PORTUGAL ($541), Aer Lingus ($554), and Virgin Atlantic ($558).

  • 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 Malaysia Airlines (89%), Air Canada (84%) or Austrian Airlines (84%) 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 $1,396, our data indicates the cheapest price to be $623. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around $467.

  • 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
Gatwick to John F Kennedy Intl flights
London City to John F Kennedy Intl flights
Heathrow to LaGuardia flights
Gatwick to Newark flights
London City to Newark flights
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London City to Las Vegas flights
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Heathrow to Philadelphia flights
London City to San Francisco flights
Gatwick to Stewart flights
Gatwick to Dulles Intl flights
Gatwick to O'Hare Intl flights
London City to Dulles Intl flights
Heathrow to Santa Ana flights
Heathrow to Charlotte 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 2,629,791 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$449Average$601FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$483Average$729FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$501Average$676FlexibilityNo cancel feeOn-time76%
FinnairCheapest$535Average$662FlexibilityNo cancel feeOn-time76%
IberiaCheapest$555Average$770FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$556Average$778FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$557Average$1,010FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$561Average$796FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$578Average$733FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$646Average$1,058FlexibilityNo cancel feeOn-time76%
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