HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$472+ 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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ORD
Dec 27 — Jan 31
Fri 12/27
Fri 1/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from London to Illinois with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from London to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 22, 2024.

Round-trip from

$575
(oojo)

One-way from

$472
(Kiwi.com)
From London (LON) to Illinois
Search Deals
One-way flight from London (LON) to Illinois
Search Deals

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 December 22, 2024.

This United Airlines deal was found by Cheapflights users on 12/21. 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.
Sun 12/291:35 pmLHR - ORD
Nonstop9h 25mUnited Airlines
Mon 1/135:50 pmORD - LHR
Nonstop8h 05mUnited Airlines
Deal found 12/21$578
This OneTravel deal was found by Cheapflights users on 12/21. 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 OneTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/292:30 pmLHR - ORD
1 stop24h 27mAir Canada
Mon 1/139:50 amORD - LHR
2 stops15h 20mAir Canada
Deal found 12/21$607
This StudentUniverse deal was found by Cheapflights users on 12/21. 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.
Mon 12/3011:55 amLHR - ORD
Nonstop8h 50mFinnair
Thu 5/228:30 pmORD - LHR
Nonstop7h 50mFinnair
Deal found 12/21$621
This Ticket deal was found by Cheapflights users on 12/21. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/306:40 amLHR - ORD
1 stop15h 10mScandinavian Airlines
Mon 1/137:10 pmORD - LHR
2 stops17h 40mScandinavian Airlines
Deal found 12/21$637
This Gotogate deal was found by Cheapflights users on 12/21. 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.
Tue 12/3110:25 amLHR - ORD
Nonstop9h 25mBrussels Airlines
Tue 1/74:08 pmORD - LHR
1 stop35h 32mBrussels Airlines
Deal found 12/21$644
This Kiwi.com deal was found by Cheapflights users on 12/21. 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.
Sun 12/297:40 pmLHR - ORD
1 stop24h 50mMultiple Airlines
Tue 1/74:22 pmORD - LHR
1 stop23h 48mMultiple Airlines
Deal found 12/21$652
This Delta deal was found by Cheapflights users on 12/21. 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 12/314:10 pmLHR - ORD
1 stop13h 46mDelta
Tue 1/75:55 pmORD - LHR
2 stops13h 55mDelta
Deal found 12/21$659
This Ticket deal was found by Cheapflights users on 12/21. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/307:45 amLCY - ORD
1 stop12h 45mKLM
Mon 1/134:25 pmORD - LCY
1 stop11h 05mKLM
Deal found 12/21$663
This Kiwi.com deal was found by Cheapflights users on 12/21. 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.
Tue 12/246:30 pmLHR - ORD
1 stop27h 00mTAP AIR PORTUGAL
Fri 1/108:20 pmORD - LHR
1 stop16h 35mTAP AIR PORTUGAL
Deal found 12/21$715
This TravelJunction deal was found by Cheapflights users on 12/21. 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 TravelJunction is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/306:15 pmLCY - ORD
1 stop27h 00mLufthansa
Mon 1/138:50 amORD - LCY
2 stops22h 00mLufthansa
Deal found 12/21$721
This TAP AIR PORTUGAL deal was found by Cheapflights users on 12/21. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/244:35 pmLGW - ORD
1 stop28h 55mTAP AIR PORTUGAL
Fri 1/108:20 pmORD - LGW
1 stop13h 25mTAP AIR PORTUGAL
Deal found 12/21$726
This SWISS deal was found by Cheapflights users on 12/21. 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.
Mon 12/307:00 amLHR - ORD
2 stops15h 15mSWISS
Mon 1/137:05 pmORD - LHR
2 stops15h 35mSWISS
Deal found 12/21$745

Find flights from London to Illinois within your budget

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 December 22, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 1/17

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Fri 1/24

6:30 pm-10:55 am

1 stop10h 25m

$575

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 1/21

11:55 am-2:45 pm

Nonstop8h 50m

Chicago O'Hare Intl

Thu 5/15

9:30 pm-5:05 pm

1 stop13h 35m

$575

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 1/27

3:00 pm-10:54 am

1 stop25h 54m

Chicago O'Hare Intl

Wed 2/19

11:35 am-7:10 am

1 stop13h 35m

$576

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sat 1/11

6:45 pm-1:40 pm

2 stops48h 55m

Chicago O'Hare Intl

Mon 1/20

7:05 pm-5:50 pm

1 stop16h 45m

$577

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 1/7

12:05 pm-9:43 pm

2 stops15h 38m

Chicago O'Hare Intl

Sun 1/12

6:08 pm-6:40 am

1 stop30h 32m

$577

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 4/4

6:40 am-4:10 pm

1 stop15h 30m

Chicago O'Hare Intl

Thu 4/17

7:15 pm-4:00 pm

1 stop14h 45m

$578

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 1/13

8:40 am-6:14 pm

2 stops15h 34m

Chicago Midway

Mon 1/27

12:44 pm-10:35 am

1 stop15h 51m

$578

LondonChicago

LCY - ORD

LCYORD

London City

Wed 2/12

9:20 am-2:30 pm

1 stop11h 10m

Chicago O'Hare Intl

Wed 2/19

6:15 am-8:10 am

2 stops19h 55m

$579

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 1/2

6:50 am-12:15 pm

1 stop11h 25m

Chicago O'Hare Intl

Mon 1/20

4:20 pm-10:25 am

1 stop12h 05m

$580

LondonChicago

LCY - ORD

LCYORD

London City

Mon 1/20

7:10 pm-12:15 pm

2 stops23h 05m

Chicago O'Hare Intl

Mon 1/27

7:05 pm-8:45 am

1 stop31h 40m

$580

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 60 results
1
2
3
...
6

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.

Travel insights for flights from London to Illinois

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

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 $317). 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 December 22, 2024.

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 December 22, 2024.

The most flights from LON 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 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 22, 2024.
Peruse reviews from past customers who have flown with Air Canada, SWISS and Scandinavian Airlines 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
8,594 reviews

Food

7.3

Boarding

8.2

Crew

8.6

Comfort

8.0

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
8,594 reviews
Delta
8.0
Very good
8,594 reviews

Food

7.3

Boarding

8.2

Crew

8.6

Comfort

8.0

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
1,342 reviews
Delta
8.0
Very good
8,594 reviews

Food

7.3

Boarding

8.2

Crew

8.6

Comfort

8.0

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
1,283 reviews
Delta
8.0
Very good
8,594 reviews

Food

7.3

Boarding

8.2

Crew

8.6

Comfort

8.0

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

LOT
7.6
Good
1,127 reviews
Delta
8.0
Very good
8,594 reviews

Food

7.3

Boarding

8.2

Crew

8.6

Comfort

8.0

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
785 reviews
Delta
8.0
Very good
8,594 reviews

Food

7.3

Boarding

8.2

Crew

8.6

Comfort

8.0

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 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 Icelandair, which is currently one of the cheapest options available, starting at $475. Aer Lingus flights start at $483 while deals on WestJet start at $502 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 City - Chicago O'Hare Intl.

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

    Consider SWISS (89%), Air Canada (86%) or Austrian Airlines (86%) 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 $623. On average you can expect to pay $1,532. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for $455.

  • 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 $317). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London 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
London City to Newark flights
Gatwick to Newark flights
Heathrow to Los Angeles flights
Heathrow to Miami flights
Luton to Newark flights
Heathrow to Boston flights
Luton to John F Kennedy Intl flights
Heathrow to Orlando flights
Gatwick to LaGuardia flights
Heathrow to Las Vegas flights
Heathrow to San Francisco flights
Heathrow to Dulles Intl flights
Manchester to John F Kennedy Intl flights
Heathrow to Dallas/Fort Worth flights
Gatwick to Orlando flights
Heathrow to Seattle flights
Heathrow to O'Hare Intl flights
London City to Miami flights
Luton to Stewart flights
Gatwick to Los Angeles flights
Stansted to John F Kennedy Intl flights
London City to Los Angeles flights
Manchester to Orlando flights
Gatwick to Miami flights
Gatwick to Boston flights
Stansted to Newark flights
Heathrow to Baltimore flights
Heathrow to Ontario flights
London City to Boston flights
Heathrow to Denver flights
Heathrow to Tampa flights
Heathrow to Hobby flights
Stansted to Boston flights
Gatwick to San Francisco flights
Heathrow to Atlanta flights
Manchester to Newark flights
Heathrow to Charlotte flights
Heathrow to Nashville flights
Heathrow to Philadelphia flights
London City to Las Vegas flights
Gatwick to Dulles Intl flights
London City to San Francisco flights
Stansted to Miami flights

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 December 22, 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%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.