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Cheap flights from London Heathrow Airport to Illinois from £419

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 14/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
26 Nov — 3 Dec1
1 adult

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 939,815 searches. Data last updated 21 November 2024.

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Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 13/1

06:40-15:50

1 stop15h 10m

Chicago O'Hare Intl

Mon 27/1

19:10-17:00

2 stops15h 50m

£444

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 18/3

06:10-15:30

1 stop14h 20m

Chicago O'Hare Intl

Mon 24/3

15:00-10:15

1 stop14h 15m

£450

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 5/12

08:50-14:00

1 stop11h 10m

Chicago O'Hare Intl

Sun 15/12

15:55-08:05

1 stop10h 10m

£453

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 17/2

06:30-18:14

2 stops17h 44m

Chicago Midway

Thu 27/2

14:08-06:50

1 stop10h 42m

£453

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 23/4

06:00-16:10

1 stop16h 10m

Chicago O'Hare Intl

Wed 30/4

18:00-22:00

1 stop22h 00m

£462

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 12/2

11:45-19:20

1 stop13h 35m

Chicago O'Hare Intl

Tue 18/2

18:25-08:15

Nonstop7h 50m

£470

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 11/12

20:40-17:20

1 stop26h 40m

Chicago O'Hare Intl

Tue 17/12

18:30-19:30

1 stop19h 00m

£476

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 5/12

15:45-18:45

Nonstop9h 00m

Chicago O'Hare Intl

Sun 8/12

13:15-06:20

1 stop35h 05m

£478

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 16/2

06:30-16:13

2 stops15h 43m

Chicago O'Hare Intl

Wed 26/2

14:03-06:25

1 stop10h 22m

£483

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 12/2

11:00-13:55

Nonstop8h 55m

Chicago O'Hare Intl

Tue 18/2

17:00-06:50

Nonstop7h 50m

£486

Flights are sorted by cheapest return flights first.

Deals found on 19/11

Showing 1-10 of 58 results
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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 21 November 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 21 November 2024.

Thu 5/1208:50LHR - ORD
1 stop11h 10mAer Lingus
Sun 15/1215:55ORD - LHR
1 stop10h 10mAer Lingus
Deal found 20/11£453
Wed 11/1206:00LHR - ORD
1 stop15h 30mTAP AIR PORTUGAL
Wed 15/119:15ORD - LHR
1 stop21h 25mTAP AIR PORTUGAL
Deal found 20/11£463
Sat 7/1206:40LHR - ORD
2 stops21h 03mScandinavian Airlines
Sat 14/1219:10ORD - LHR
1 stop14h 50mScandinavian Airlines
Deal found 20/11£473
Wed 11/1220:40LHR - ORD
1 stop26h 40mIcelandair
Tue 17/1218:30ORD - LHR
1 stop19h 00mIcelandair
Deal found 20/11£476
Mon 30/1209:30LHR - ORD
1 stop16h 14mAmerican Airlines
Wed 29/115:00ORD - LHR
1 stop13h 15mAmerican Airlines
Deal found 20/11£480
Tue 26/1106:50LHR - ORD
1 stop11h 25mLufthansa
Sat 30/1120:25ORD - LHR
1 stop28h 05mLufthansa
Deal found 20/11£483
Tue 3/1209:55LHR - ORD
2 stops34h 10mMultiple Airlines
Tue 10/1215:35ORD - LHR
2 stops22h 30mMultiple Airlines
Deal found 19/11£484
Wed 11/1208:40LHR - MDW
2 stops15h 52mDelta
Wed 15/110:57MDW - LHR
1 stop13h 23mDelta
Deal found 20/11£485
Sat 23/1114:30LHR - ORD
1 stop26h 24mUnited Airlines
Mon 25/1110:51ORD - LHR
1 stop13h 29mUnited Airlines
Deal found 19/11£494
Thu 5/1212:00LHR - ORD
2 stops32h 30mFinnair
Thu 12/1213:15ORD - LHR
1 stop13h 00mFinnair
Deal found 20/11£508
Wed 11/1206:30LHR - ORD
2 stops16h 36mDelta
Wed 18/1211:59ORD - LHR
1 stop12h 21mDelta
Deal found 20/11£513
Tue 3/1219:25LHR - ORD
1 stop24h 40mAustrian Airlines
Tue 10/1221:10ORD - LHR
Nonstop8h 05mAustrian Airlines
Deal found 19/11£529

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 £598). Flying from London Heathrow Airport to Illinois in July is currently the most expensive (average of £774). 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 21 November 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 21 November 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 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 21 November 2024.
Read reviews from past customers who have flown Delta, Scandinavian Airlines and Finnair 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
8,756 reviews
Check prices

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

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
8,756 reviews
Delta
8.0
Very Good
8,756 reviews
Check prices

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

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
8,756 reviews
Check prices

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

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
8,756 reviews
Check prices

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

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
8,756 reviews
Check prices

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

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
8,756 reviews
Check prices

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

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 £427 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Aer Lingus from £437 and Virgin Atlantic from £440 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: Malaysia Airlines (89%), Air Canada (84%), Austrian Airlines( 84%).

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

    Looking at all options, your cheapest flight can be booked for £512. While the most popular route (London Heathrow - Chicago O'Hare Intl) can be booked for £369 on average our data indicates £1,407 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 £598). Flying from London Heathrow Airport to Illinois in July is currently the most expensive (average of £774). 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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Heathrow to Newark flights
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Stansted to Stewart flights
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London City to Los Angeles flights
Luton to Stewart flights
Gatwick to LaGuardia flights
Stansted to Newark flights
Heathrow to Seattle flights
Luton to Newark flights
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Gatwick to Orlando flights
Heathrow to Austin flights
London City to Las Vegas flights
London City to Orlando flights
Gatwick to Boston flights
Heathrow to Ontario flights
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Heathrow to Raleigh flights
Heathrow to George Bush Intcntl flights
London City to Boston flights
Gatwick to Stewart flights
Heathrow to Denver flights
London City to Dulles Intl flights
Stansted to Boston flights
Gatwick to San Francisco flights
Heathrow to Nashville flights
Gatwick to O'Hare Intl flights
Gatwick to Dulles Intl flights
Heathrow to Atlanta 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 939,815 searches. Data last updated 21 November 2024.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£375Average£509FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£386Average£554FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapest£389Average£532FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£396Average£565FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£426Average£739FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£429Average£572FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
KLMCheapest£437Average£744FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£449Average£618FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Aer LingusCheapest£450Average£595FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Austrian AirlinesCheapest£455Average£599FlexibilityNo cancel feeOn-time78%
Search Austrian 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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