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$314+ Cheap flights from London (LON) 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ORD
abr. 22 — abr. 291
mar. 4/22
mar. 4/29
1 adult, Economy
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Cheap flight deals from London to Illinois

Keep the following information in mind while searching for London to Illinois flight deals. Data was last updated abril 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$531
(Kiwi.com)

One-way from

$314
(Trip.com)

Popular in

August

Cheapest in

February

Average price

$676

Good round-trip deal

$645 or less

Good one-way deal

$671 or less
Provider with most accurate pricing for London (LON)-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for London (LON)-Chicago (CHI) flights.
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From London (LON) to Illinois
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One-way flight from London (LON) to Illinois
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Highest demand for flights based on searches. 13% potential increase in price ($105 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from London (LON) to Illinois.
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Price to beat on a one-way flight from London (LON) to Illinois.
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Find flight deals from London to Illinois

Cheapest flights from London to Illinois
Explore the most affordable flight options available from London to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/121:05 pmLGW - ORD
1 stop24h 22mMultiple Airlines
vie. 5/169:08 pmORD - LGW
1 stop27h 12mMultiple Airlines
Deal found 4/16$531
This TravelUp deal was found by Cheapflights users on 4/16. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/76:50 amLHR - ORD
1 stop11h 10mMultiple Airlines
dom. 5/186:30 pmORD - LHR
1 stop11h 20mMultiple Airlines
Deal found 4/16$546
This SWISS deal was found by Cheapflights users on 4/16. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/66:35 pmLGW - ORD
1 stop27h 20mSWISS
mar. 5/137:05 pmORD - LGW
1 stop16h 45mSWISS
Deal found 4/16$547
This United Airlines deal was found by Cheapflights users on 4/16. 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.
mié. 5/78:40 amLHR - ORD
1 stop13h 15mUnited Airlines
lun. 5/1210:40 amORD - LHR
1 stop17h 00mUnited Airlines
Deal found 4/16$548
This World Air Fares deal was found by Cheapflights users on 4/16. 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 World Air Fares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/212:20 pmLGW - ORD
2 stops17h 29mFinnair
sáb. 5/106:35 pmORD - LGW
2 stops30h 00mFinnair
Deal found 4/16$549
This Lufthansa deal was found by Cheapflights users on 4/16. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/248:30 amLHR - ORD
1 stop12h 15mLufthansa
mié. 5/79:20 pmORD - LHR
Nonstop8h 25mLufthansa
Deal found 4/16$550
This Austrian Airlines deal was found by Cheapflights users on 4/17. 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.
jue. 4/246:00 amLHR - ORD
1 stop13h 20mAustrian Airlines
lun. 5/54:05 pmORD - LHR
Nonstop8h 15mAustrian Airlines
Deal found 4/17$551
This Gotogate deal was found by Cheapflights users on 4/16. 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.
lun. 12/111:55 amLGW - ORD
1 stop11h 25mIcelandair
lun. 12/156:30 pmORD - LGW
1 stop10h 25mIcelandair
Deal found 4/16$554
This Air Canada deal was found by Cheapflights users on 4/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/248:40 amLHR - ORD
2 stops15h 42mAir Canada
lun. 5/56:30 pmORD - LHR
1 stop11h 20mAir Canada
Deal found 4/17$555
This American Airlines deal was found by Cheapflights users on 4/16. 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.
mié. 9/177:40 amLHR - ORD
1 stop14h 05mAmerican Airlines
mié. 9/243:14 pmORD - LHR
1 stop10h 36mAmerican Airlines
Deal found 4/16$557
This TravelUp deal was found by Cheapflights users on 4/16. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/249:15 amLHR - ORD
Nonstop8h 30mBritish Airways
mié. 5/75:40 pmORD - LHR
Nonstop7h 40mBritish Airways
Deal found 4/16$558
This The Travel House deal was found by Cheapflights users on 4/16. 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.
mar. 11/1112:15 pmLHR - ORD
1 stop11h 05mIcelandair
mar. 11/256:30 pmORD - LHR
1 stop19h 00mIcelandair
Deal found 4/16$561

Cheapflights Fare Finder

Customize your flight search to find flights from London 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 abril 17, 2025.
Use the filters below to find and compare flights from London to Illinois that are best for you.

Fly from

London

Fly to

Illinois

Route

Depart

Return

Price

LondonChicago

LGW - ORD

LGWORD

London Gatwick

lun. 5/12

1:05 pm-7:27 am

1 stop24h 22m

Chicago O'Hare Intl

vie. 5/16

9:08 pm-6:20 am

1 stop27h 12m

$531

LondonChicago

LHR - ORD

LHRORD

London Heathrow

mié. 5/7

6:50 am-12:00 pm

1 stop11h 10m

Chicago O'Hare Intl

dom. 5/18

6:30 pm-11:50 am

1 stop11h 20m

$546

LondonChicago

LGW - ORD

LGWORD

London Gatwick

mar. 5/6

6:35 pm-3:55 pm

1 stop27h 20m

Chicago O'Hare Intl

mar. 5/13

7:05 pm-5:50 pm

1 stop16h 45m

$547

LondonChicago

LHR - ORD

LHRORD

London Heathrow

jue. 5/1

8:40 am-3:55 pm

1 stop13h 15m

Chicago O'Hare Intl

lun. 5/5

6:35 pm-1:00 pm

1 stop12h 25m

$548

LondonChicago

LGW - ORD

LGWORD

London Gatwick

vie. 5/2

12:20 pm-11:49 pm

2 stops17h 29m

Chicago O'Hare Intl

sáb. 5/10

6:35 pm-6:35 am

2 stops30h 00m

$549

LondonChicago

LHR - ORD

LHRORD

London Heathrow

mié. 5/7

8:40 am-3:55 pm

1 stop13h 15m

Chicago O'Hare Intl

lun. 5/12

3:52 pm-11:35 am

1 stop13h 43m

$549

LondonChicago

LHR - ORD

LHRORD

London Heathrow

jue. 5/1

8:30 am-2:45 pm

1 stop12h 15m

Chicago O'Hare Intl

lun. 5/5

6:05 pm-8:20 am

Nonstop8h 15m

$551

LondonChicago

LHR - ORD

LHRORD

London Heathrow

dom. 4/27

6:00 am-1:20 pm

1 stop13h 20m

Chicago O'Hare Intl

dom. 5/4

4:05 pm-6:20 am

Nonstop8h 15m

$552

LondonChicago

LHR - ORD

LHRORD

London Heathrow

vie. 9/19

8:50 am-3:45 pm

1 stop12h 55m

Chicago O'Hare Intl

vie. 9/26

4:56 pm-11:05 am

1 stop12h 09m

$557

LondonChicago

LHR - ORD

LHRORD

London Heathrow

mié. 4/30

12:15 pm-2:45 pm

Nonstop8h 30m

Chicago O'Hare Intl

jue. 5/8

5:40 pm-7:20 am

Nonstop7h 40m

$558

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 60 results
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Best time to book a flight from London to Illinois

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

Cheapflights Insights

Everything you need to know about your flight from London to Illinois

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

Currently, August is the cheapest month in which you can book a flight from London to Illinois (average of $245). Flying from London to Illinois in March is currently the most expensive (average of $321). 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 LON to IL?

Find hourly flight availability from London 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 abril 17, 2025.

When flying from London 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 to Illinois

Explore weekly flight availability from London 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 abril 17, 2025.

The most flights from LON to USIL are scheduled on a Monday (53 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (45 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 abril 17, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and LOT from London to Illinois to help guide your decision. 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
7,916 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,916 reviews
Delta
8.0
Very good
7,916 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,327 reviews
Delta
8.0
Very good
7,916 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
LOT
7.6
Good
1,065 reviews
Delta
8.0
Very good
7,916 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,269 reviews
Delta
8.0
Very good
7,916 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.6
Good
775 reviews
Delta
8.0
Very good
7,916 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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 London 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 to Illinois one-way?

    To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at $503. WestJet flights start at $504 while deals on Aer Lingus start at $510 one-way.

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

    The most popular route from London to Illinois is London Heathrow - Chicago O'Hare Intl. You may also consider London Gatwick - Chicago O'Hare Intl or London Heathrow - Chicago Midway.

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

    Consider United Airlines (90%), SWISS (89%) or Air Canada (87%) when booking your flight. These represent the most reliable airlines when flying from London to Illinois.

  • What are the cheapest flights from London to Illinois?

    The cheapest flight price from London to Illinois is $550. On average you can expect to pay $2,246. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for $524.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London 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 to Illinois?

    Currently, August is the cheapest month in which you can book a flight from London to Illinois (average of $245). Flying from London to Illinois in March is currently the most expensive (average of $321). 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 London to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from London to Illinois

Discover the top 10 airlines that operate flights from London 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 abril 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$451Average$575FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$462Average$569FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$483Average$677FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$551Average$798FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$562Average$848FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$574Average$730FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$582Average$780FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$583Average$792FlexibilityNo cancel feeOn-time71%
FinnairCheapest$613Average$866FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$660Average$1,049FlexibilityNo cancel feeOn-time76%

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