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Cheap flights from the United Kingdom to Illinois from £267

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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
26 Jan — 2 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to Illinois

Enter your travel dates to find the best prices.

Cheapest flights from United Kingdom to Illinois
Explore the most affordable flight options available from United Kingdom to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 December 2025.

Wed 31/1216:20LHR - ORD
1 stop32h 32mAustrian Airlines
Wed 7/121:05ORD - LHR
Nonstop8h 10mAustrian Airlines
Deal found 26/12£485
Tue 30/1207:50STN - ORD
1 stop12h 10mMultiple Airlines
Tue 6/121:00ORD - STN
1 stop18h 20mMultiple Airlines
Deal found 26/12£613
Tue 30/1208:50LGW - ORD
1 stop11h 10mMultiple Airlines
Tue 6/121:00ORD - LGW
1 stop11h 00mMultiple Airlines
Deal found 26/12£639
Fri 26/1212:15LHR - ORD
1 stop11h 05mIcelandair
Thu 22/118:30ORD - LHR
1 stop10h 20mIcelandair
Deal found 26/12£687
Tue 30/1206:00STN - ORD
1 stop14h 00mMultiple Airlines
Mon 5/121:00ORD - STN
1 stop18h 20mMultiple Airlines
Deal found 26/12£691
Fri 26/1208:05LHR - ORD
1 stop19h 59mJetBlue
Thu 22/107:45ORD - LHR
1 stop17h 10mJetBlue
Deal found 25/12£697
Tue 30/1208:50LGW - ORD
1 stop11h 10mMultiple Airlines
Mon 5/121:00ORD - LGW
1 stop18h 00mMultiple Airlines
Deal found 26/12£716
Fri 26/1213:55LHR - ORD
2 stops33h 10mMultiple Airlines
Sat 31/110:00ORD - LHR
2 stops20h 50mMultiple Airlines
Deal found 26/12£728
Wed 31/1207:50LHR - ORD
2 stops33h 10mAer Lingus
Wed 7/121:00ORD - LHR
1 stop12h 35mAer Lingus
Deal found 26/12£753
Fri 26/1221:25LGW - ORD
2 stops47h 20mMultiple Airlines
Sat 31/117:53ORD - LGW
1 stop30h 07mMultiple Airlines
Deal found 26/12£756
Tue 30/1209:00LTN - ORD
1 stop11h 00mMultiple Airlines
Tue 6/121:00ORD - LTN
1 stop17h 05mMultiple Airlines
Deal found 26/12£761
Tue 30/1206:00STN - ORD
1 stop14h 00mMultiple Airlines
Sun 4/121:52ORD - STN
2 stops38h 28mMultiple Airlines
Deal found 25/12£763

Find flight deals from United Kingdom to Illinois

Keep the following information in mind while searching for United Kingdom to Illinois flight deals. Data was last updated 27 December 2025.

Round-trip from

£393

One-way from

£267

Popular in

July

Cheapest in

February

Average price

£592

Good round-trip deal

£542 or less

Good one-way deal

£445 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 1/2-8/2
  • 3 total stops
  • 31h 40m total
  • United Kingdom to Illinois
Search Deals
11/3
  • 11/3
  • 2 total stops
  • 15h 05m total
  • United Kingdom to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£59 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from United Kingdom to Illinois.
Search Deals
Price to beat on a one-way flight from United Kingdom to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from United Kingdom 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 858,174 searches. Data last updated 27 December 2025.
Use the filters below to find and compare flights from the United Kingdom to Illinois that are best for you.

Fly from

United Kingdom

Fly to

Illinois

Route

Depart

Return

Price

ManchesterChicago

MAN - ORD

MANORD

Manchester

Sun 1/2

10:10-16:55

1 stop12h 45m

Chicago O'Hare Intl

Sun 8/2

19:10-20:05

2 stops18h 55m

£406

ManchesterChicago

MAN - ORD

MANORD

Manchester

Fri 6/2

20:55-16:45

2 stops25h 50m

Chicago O'Hare Intl

Wed 11/2

19:20-12:15

2 stops34h 55m

£409

ManchesterChicago

MAN - ORD

MANORD

Manchester

Thu 12/2

19:15-16:45

1 stop27h 30m

Chicago O'Hare Intl

Mon 23/3

20:20-18:35

1 stop17h 15m

£412

ManchesterChicago

MAN - ORD

MANORD

Manchester

Thu 5/2

10:10-16:45

1 stop12h 35m

Chicago O'Hare Intl

Mon 9/2

19:20-18:35

1 stop17h 15m

£413

LondonChicago

LCY - ORD

LCYORD

London City

Thu 19/2

06:50-12:33

2 stops35h 43m

Chicago O'Hare Intl

Mon 23/2

21:00-18:35

1 stop15h 35m

£416

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 22/1

12:35-15:25

Nonstop8h 50m

Chicago O'Hare Intl

Sun 25/1

18:25-08:15

Nonstop7h 50m

£416

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 19/3

09:00-17:20

1 stop13h 20m

Chicago O'Hare Intl

Sat 28/3

16:25-05:45

Nonstop8h 20m

£417

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 21/2

12:35-15:25

Nonstop8h 50m

Chicago O'Hare Intl

Sat 28/2

17:10-06:55

Nonstop7h 45m

£417

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 22/1

12:30-09:05

1 stop26h 35m

Chicago O'Hare Intl

Sun 25/1

13:25-09:00

1 stop13h 35m

£418

LondonChicago

LCY - ORD

LCYORD

London City

Mon 16/2

09:15-16:20

1 stop13h 05m

Chicago O'Hare Intl

Mon 23/2

18:50-17:05

1 stop16h 15m

£425

Flights are sorted by cheapest return flights first.

Deals found on 25/12

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

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

Cheapflights Insights

Everything you need to know about your flight from the United Kingdom to Illinois

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

Currently, January is the cheapest month in which you can book a flight from United Kingdom to Illinois (average of £38). Flying from United Kingdom to Illinois in July is currently the most expensive (average of £464). 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 GB to IL?

Find hourly flight availability from United Kingdom 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 27 December 2025.

When flying from United Kingdom 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 United Kingdom to Illinois

Explore weekly flight availability from United Kingdom 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 27 December 2025.

The most flights from GB0 to USIL are scheduled on a Saturday (44 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (30 on average).

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 27 December 2025.
Read through reviews of airlines operating flights from the United Kingdom to Illinois, such as United Airlines, Aer Lingus, andIcelandair. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,116 reviews
Check prices

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
9,116 reviews
United Airlines
7.4
Good
9,116 reviews
Check prices

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Aer Lingus
7.2
Good
1,412 reviews
United Airlines
7.4
Good
9,116 reviews
Check prices

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Icelandair
7.0
Good
592 reviews
United Airlines
7.4
Good
9,116 reviews
Check prices

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Lufthansa
6.8
Okay
7,653 reviews
United Airlines
7.4
Good
9,116 reviews
Check prices

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
British Airways
6.7
Okay
7,614 reviews
United Airlines
7.4
Good
9,116 reviews
Check prices

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

Related info for your journey

Find useful and relevant information for your journey from United Kingdom to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from United Kingdom to Illinois?

    A quick flight from United Kingdom to Illinois can take about 12h 45m. Scandinavian Airlines provides one of the quickest options available for as low as £406. The distance between United Kingdom and Illinois is about 3812 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines to fly from United Kingdom to Illinois one-way?

    £243 is the cheapest one-way deal found within the past few days, from Scandinavian Airlines. You may also be able to find cheap deals on Icelandair and TAP AIR PORTUGAL, with prices starting from £284 and £291, respectively.

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

    Yes. In addition to deals on United Kingdom to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from United Kingdom to Illinois?

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

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

    Yes. Cheapflights offers flight deals from United Kingdom 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 United Kingdom to Illinois?

    Currently, January is the cheapest month in which you can book a flight from United Kingdom to Illinois (average of £38). Flying from United Kingdom to Illinois in July is currently the most expensive (average of £464). 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 United Kingdom 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 United Kingdom to Illinois

Discover the top 10 airlines that operate flights from United Kingdom 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 858,174 searches. Data last updated 27 December 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£285Average£556FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£343Average£579FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£354Average£462FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£363Average£707FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£377Average£546FlexibilityNo cancel feeOn-time70%
Search British Airways flights
TAP AIR PORTUGALCheapest£381Average£603FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£384Average£539FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£392Average£619FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£402Average£607FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£407Average£653FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from United Kingdom to Illinois?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Illinois from United Kingdom today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Illinois?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Illinois from United Kingdom.

Can Cheapflights find flights from United Kingdom to Illinois with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from United Kingdom to Illinois, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from United Kingdom to Illinois become cheaper?

Yes, Cheapflights offers price alerts on United Kingdom to Illinois flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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