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Cheap flights from the United Kingdom to Illinois from £225

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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
8 Feb — 15 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap 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 9 January 2026.

Round-trip from

£393

One-way from

£225

Popular in

July

Cheapest in

February

Average price

£462

Good round-trip deal

£519 or less

Good one-way deal

£445 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 12/3-16/3
  • 4 total stops
  • 49h 35m total
  • United Kingdom to Illinois
Search Deals
5/2
  • 5/2
  • 3 total stops
  • 50h 56m total
  • United Kingdom to Illinois
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£65 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 January 2026
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

Find 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 9 January 2026.

Thu 12/313:55MAN - ORD
2 stops33h 00mScandinavian Airlines
Mon 16/320:20ORD - MAN
2 stops16h 35mScandinavian Airlines
Deal found 7/1£393
Mon 23/220:45MAN - ORD
2 stops50h 00mScandinavian Airlines
Thu 26/219:20ORD - MAN
2 stops34h 55mScandinavian Airlines
Deal found 8/1£394
Mon 26/110:10MAN - ORD
1 stop12h 35mScandinavian Airlines
Mon 9/219:20ORD - MAN
1 stop17h 15mScandinavian Airlines
Deal found 8/1£396
Thu 5/219:15MAN - ORD
1 stop27h 30mScandinavian Airlines
Wed 11/219:20ORD - MAN
1 stop17h 15mScandinavian Airlines
Deal found 8/1£397
Thu 5/219:15MAN - ORD
1 stop27h 30mScandinavian Airlines
Mon 9/219:20ORD - MAN
1 stop17h 15mScandinavian Airlines
Deal found 5/1£398
Wed 4/210:10MAN - ORD
1 stop12h 35mScandinavian Airlines
Sun 8/219:10ORD - MAN
1 stop32h 20mScandinavian Airlines
Deal found 6/1£399
Mon 12/120:35LHR - ORD
1 stop26h 45mIcelandair
Mon 19/118:30ORD - LHR
1 stop19h 00mIcelandair
Deal found 7/1£399
Sat 17/106:00LHR - ORD
1 stop12h 45mMultiple Airlines
Sat 24/121:05ORD - LHR
Nonstop8h 10mMultiple Airlines
Deal found 7/1£400
Fri 16/106:00LHR - ORD
1 stop12h 45mMultiple Airlines
Thu 29/115:45ORD - LHR
Nonstop8h 10mMultiple Airlines
Deal found 8/1£401
Sun 1/210:10MAN - ORD
1 stop12h 45mScandinavian Airlines
Sun 8/219:10ORD - MAN
2 stops18h 55mScandinavian Airlines
Deal found 7/1£401
Sat 7/207:40LHR - ORD
1 stop12h 30mMultiple Airlines
Sun 22/221:15ORD - LHR
Nonstop8h 00mMultiple Airlines
Deal found 7/1£402
Fri 30/110:10MAN - ORD
1 stop12h 45mScandinavian Airlines
Sun 8/219:10ORD - MAN
1 stop17h 25mScandinavian Airlines
Deal found 8/1£402

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 9 January 2026.
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 21/2

10:10-16:45

1 stop12h 35m

Chicago O'Hare Intl

Wed 25/2

19:20-18:35

1 stop17h 15m

£398

ManchesterChicago

MAN - ORD

MANORD

Manchester

Fri 20/2

19:15-16:45

1 stop27h 30m

Chicago O'Hare Intl

Thu 26/2

19:20-09:30

1 stop32h 10m

£398

ManchesterChicago

MAN - ORD

MANORD

Manchester

Thu 19/2

19:15-16:45

1 stop27h 30m

Chicago O'Hare Intl

Mon 2/3

19:20-09:30

1 stop32h 10m

£398

ManchesterChicago

MAN - ORD

MANORD

Manchester

Wed 4/2

10:10-16:45

1 stop12h 35m

Chicago O'Hare Intl

Sun 8/2

19:10-09:30

1 stop32h 20m

£399

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 21/2

12:50-19:15

1 stop12h 25m

Chicago O'Hare Intl

Sat 28/2

20:35-10:25

Nonstop7h 50m

£401

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 25/1

13:45-16:20

1 stop32h 35m

Chicago O'Hare Intl

Mon 9/2

17:50-07:55

Nonstop8h 05m

£402

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/3

07:50-14:00

1 stop12h 10m

Chicago O'Hare Intl

Tue 31/3

22:25-12:15

Nonstop7h 50m

£402

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 5/2

13:45-16:20

1 stop32h 35m

Chicago O'Hare Intl

Thu 12/2

17:50-07:55

Nonstop8h 05m

£402

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/3

07:50-14:00

1 stop12h 10m

Chicago O'Hare Intl

Tue 10/3

19:40-08:35

Nonstop7h 55m

£402

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 13/2

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

Sun 22/2

21:15-11:15

Nonstop8h 00m

£405

Flights are sorted by cheapest return flights first.

Deals found on 8/1

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 9 January 2026.

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 9 January 2026.

The most flights from GB0 to USIL are scheduled on a Wednesday (36 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (28 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 9 January 2026.
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
9,143 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Comfort

7.3

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
9,143 reviews
United Airlines
7.4
Good
9,143 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Comfort

7.3

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
1,429 reviews
United Airlines
7.4
Good
9,143 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Comfort

7.3

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
7.1
Good
593 reviews
United Airlines
7.4
Good
9,143 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Comfort

7.3

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
7,698 reviews
United Airlines
7.4
Good
9,143 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Comfort

7.3

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
7,659 reviews
United Airlines
7.4
Good
9,143 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Comfort

7.3

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 25m. Scandinavian Airlines provides one of the quickest options available for as low as £401. The distance between United Kingdom and Illinois is about 3939 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?

    £260 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 £285 and £292, 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 9 January 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£286Average£558FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£344Average£582FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£355Average£467FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£365Average£712FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£378Average£552FlexibilityNo cancel feeOn-time70%
Search British Airways flights
TAP AIR PORTUGALCheapest£385Average£610FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£385Average£539FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£393Average£624FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£402Average£611FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£408Average£655FlexibilityNo 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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