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Cheap flights from the United Kingdom to Illinois from £289

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 13/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
17 Jan — 24 Jan1
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 18 December 2025.

Wed 24/1207:50LHR - ORD
1 stop12h 10mAer Lingus
Sun 22/316:50ORD - LHR
1 stop12h 20mAer Lingus
Deal found 17/12£467
Wed 24/1219:50LHR - ORD
2 stops26h 55mScandinavian Airlines
Sun 22/320:20ORD - LHR
2 stops17h 30mScandinavian Airlines
Deal found 17/12£502
Fri 26/1208:50LHR - ORD
1 stop11h 10mAer Lingus
Thu 22/121:00ORD - LHR
1 stop12h 35mAer Lingus
Deal found 18/12£503
Tue 23/1217:25LHR - ORD
1 stop27h 30mIberia
Thu 15/118:25ORD - LHR
Nonstop7h 50mIberia
Deal found 17/12£505
Thu 25/1214:10LHR - ORD
Nonstop8h 50mBritish Airways
Thu 15/121:00ORD - LHR
1 stop11h 25mBritish Airways
Deal found 17/12£506
Fri 26/1214:10LHR - ORD
Nonstop8h 50mBritish Airways
Thu 22/121:45ORD - LHR
Nonstop7h 50mBritish Airways
Deal found 18/12£507
Wed 24/1214:10LHR - ORD
Nonstop8h 50mBritish Airways
Sun 22/319:45ORD - LHR
Nonstop7h 50mBritish Airways
Deal found 17/12£508
Thu 25/1218:20MAN - ORD
2 stops27h 05mMultiple Airlines
Wed 31/1218:30ORD - MAN
1 stop10h 15mMultiple Airlines
Deal found 17/12£525
Thu 25/1210:00LGW - ORD
2 stops35h 25mMultiple Airlines
Fri 6/212:44ORD - LGW
1 stop15h 16mMultiple Airlines
Deal found 15/12£529
Fri 26/1206:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Thu 22/119:20ORD - LHR
1 stop20h 20mScandinavian Airlines
Deal found 16/12£535
Thu 25/1218:30LHR - ORD
1 stop26h 55mTAP AIR PORTUGAL
Wed 31/1219:10ORD - LHR
1 stop16h 20mTAP AIR PORTUGAL
Deal found 17/12£538
Sun 28/1211:55LGW - ORD
1 stop11h 25mIcelandair
Mon 12/118:30ORD - LGW
1 stop10h 25mIcelandair
Deal found 17/12£552

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 18 December 2025.

Round-trip from

£384

One-way from

£289

Popular in

July

Cheapest in

February

Average price

£597

Good round-trip deal

£546 or less

Good one-way deal

£449 or less
British Airways
  • British Airways
  • 27/1-3/2
  • 2 total stops
  • 27h 55m total
  • United Kingdom to Illinois
Search Deals
13/2
  • 13/2
  • 2 total stops
  • 15h 35m total
  • United Kingdom to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£61 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 18 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

Sat 31/1

12:55-16:55

2 stops34h 00m

Chicago O'Hare Intl

Sat 7/2

19:20-12:15

2 stops34h 55m

£399

ManchesterChicago

MAN - ORD

MANORD

Manchester

Sun 15/3

19:15-17:45

1 stop27h 30m

Chicago O'Hare Intl

Wed 18/3

20:20-09:30

1 stop32h 10m

£413

ManchesterChicago

MAN - ORD

MANORD

Manchester

Thu 12/3

10:10-17:45

1 stop12h 35m

Chicago O'Hare Intl

Mon 16/3

20:20-18:35

1 stop17h 15m

£413

ManchesterChicago

MAN - ORD

MANORD

Manchester

Fri 13/3

10:10-17:55

1 stop12h 45m

Chicago O'Hare Intl

Wed 18/3

20:20-18:35

1 stop17h 15m

£413

ManchesterChicago

MAN - ORD

MANORD

Manchester

Tue 10/3

19:15-17:45

1 stop27h 30m

Chicago O'Hare Intl

Wed 18/3

20:20-18:35

1 stop17h 15m

£413

LondonChicago

STN - ORD

STNORD

London Stansted

Fri 30/1

13:50-17:20

2 stops33h 30m

Chicago O'Hare Intl

Fri 6/2

18:30-21:35

2 stops21h 05m

£449

EdinburghChicago

EDI - ORD

EDIORD

Edinburgh Turnhouse

Fri 30/1

06:45-17:20

2 stops16h 35m

Chicago O'Hare Intl

Fri 6/2

18:30-21:05

2 stops20h 35m

£452

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 22/1

16:00-23:59

1 stop13h 59m

Lambert-St Louis

Mon 26/1

11:22-08:25

1 stop15h 03m

£455

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 8/1

09:20-17:43

1 stop14h 23m

Chicago O'Hare Intl

Wed 18/2

10:00-06:55

1 stop14h 55m

£456

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Mon 12/1

14:00-23:09

1 stop15h 09m

Chicago Midway

Fri 6/2

13:00-10:00

1 stop15h 00m

£456

Flights are sorted by cheapest return flights first.

Deals found on 15/12

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 £468). 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 18 December 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 15% on flights from United Kingdom to Illinois by exploring options for tickets at midday.

What is the cheapest day to fly from United Kingdom to Illinois?

Use this chart to determine the cheapest time to fly return from United Kingdom to Illinois. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their United Kingdom to Illinois flight should consider departing on Thursday afternoons when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 18 December 2025.

The most flights from GB0 to USIL are scheduled on a Wednesday (51 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (35 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 18 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
9,092 reviews
Check prices

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

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
9,092 reviews
United Airlines
7.4
Good
9,092 reviews
Check prices

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

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
1,395 reviews
United Airlines
7.4
Good
9,092 reviews
Check prices

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

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
591 reviews
United Airlines
7.4
Good
9,092 reviews
Check prices

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

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
7,634 reviews
United Airlines
7.4
Good
9,092 reviews
Check prices

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

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
7,583 reviews
United Airlines
7.4
Good
9,092 reviews
Check prices

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

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 13h 59m. Scandinavian Airlines provides one of the quickest options available for as low as £455. The distance between United Kingdom and Illinois is about 4186 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?

    £246 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 £286 and £293, 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 £468). 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 18 December 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£287Average£560FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£346Average£585FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£361Average£468FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£367Average£713FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£371Average£613FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
British AirwaysCheapest£380Average£551FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Brussels AirlinesCheapest£387Average£545FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£396Average£626FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£406Average£609FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£411Average£659FlexibilityNo 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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