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Cheap flights from the United Kingdom to Illinois from £215

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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
27 Dec — 3 Jan1
1 adult
1 adult, Economy, 0 bags

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 27 November 2025.

Tue 9/1212:15LHR - ORD
1 stop11h 05mIcelandair
Tue 16/1218:30ORD - LHR
1 stop19h 00mIcelandair
Deal found 23/11£427
Tue 9/1209:00LTN - ORD
2 stops14h 20mMultiple Airlines
Tue 16/1218:30ORD - LTN
2 stops19h 35mMultiple Airlines
Deal found 23/11£433
Mon 15/1221:30MAN - ORD
2 stops25h 50mMultiple Airlines
Thu 8/118:30ORD - MAN
1 stop10h 15mMultiple Airlines
Deal found 26/11£434
Sun 7/1219:15MAN - ORD
1 stop27h 30mScandinavian Airlines
Wed 21/119:20ORD - MAN
1 stop17h 15mScandinavian Airlines
Deal found 25/11£436
Tue 2/1212:10LHR - ORD
1 stop11h 45mBritish Airways
Mon 8/1218:35ORD - LHR
Nonstop7h 40mBritish Airways
Deal found 25/11£436
Tue 16/1220:35LHR - ORD
1 stop26h 45mIcelandair
Tue 6/118:30ORD - LHR
1 stop10h 20mIcelandair
Deal found 24/11£438
Fri 5/1211:55LGW - ORD
1 stop11h 25mIcelandair
Mon 8/1218:30ORD - LGW
1 stop10h 25mIcelandair
Deal found 25/11£439
Thu 4/1206:30LHR - ORD
1 stop13h 30mBritish Airways
Tue 9/1218:35ORD - LHR
Nonstop7h 40mBritish Airways
Deal found 24/11£439
Thu 4/1212:15LHR - ORD
1 stop11h 05mIcelandair
Tue 9/1218:30ORD - LHR
1 stop10h 20mIcelandair
Deal found 24/11£441
Sat 6/1211:55LGW - ORD
1 stop11h 25mIcelandair
Tue 9/1218:30ORD - LGW
1 stop10h 25mIcelandair
Deal found 26/11£442
Sat 6/1207:50LHR - ORD
1 stop12h 10mAer Lingus
Wed 17/1215:50ORD - LHR
1 stop10h 15mAer Lingus
Deal found 26/11£442
Thu 4/1206:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Mon 8/1219:20ORD - LHR
1 stop17h 10mScandinavian Airlines
Deal found 26/11£442

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 27 November 2025.

Round-trip from

£424

One-way from

£215

Popular in

July

Cheapest in

February

Average price

£476

Good round-trip deal

£554 or less

Good one-way deal

£469 or less
Icelandair
  • Icelandair
  • 4/3-10/3
  • 2 total stops
  • 21h 50m total
  • United Kingdom to Illinois
Search Deals
2/3
  • 2/3
  • 3 total stops
  • 40h 03m total
  • United Kingdom to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£60 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 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 November 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

LondonChicago

LTN - ORD

LTNORD

London Luton

Sat 7/2

21:00-16:55

2 stops25h 55m

Chicago O'Hare Intl

Sun 15/2

19:10-22:00

2 stops20h 50m

£431

ManchesterChicago

MAN - ORD

MANORD

Manchester

Mon 15/12

21:30-17:20

2 stops25h 50m

Chicago O'Hare Intl

Thu 8/1

18:30-10:45

1 stop10h 15m

£434

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 25/12

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Fri 16/1

19:20-09:20

1 stop32h 00m

£439

LondonChicago

STN - ORD

STNORD

London Stansted

Mon 26/1

11:30-19:15

1 stop13h 45m

Chicago O'Hare Intl

Fri 30/1

21:00-16:35

1 stop13h 35m

£451

LondonChicago

LTN - ORD

LTNORD

London Luton

Mon 26/1

13:50-19:15

1 stop11h 25m

Chicago O'Hare Intl

Fri 30/1

21:00-16:15

1 stop13h 15m

£461

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 29/4

08:50-14:00

1 stop11h 10m

Chicago O'Hare Intl

Thu 21/5

20:30-10:30

Nonstop8h 00m

£462

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 4/2

11:20-16:21

1 stop35h 01m

Chicago O'Hare Intl

Sun 8/2

18:00-07:30

1 stop31h 30m

£464

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 7/5

21:05-16:10

2 stops25h 05m

Chicago O'Hare Intl

Tue 12/5

07:30-09:35

2 stops20h 05m

£466

ManchesterChicago

MAN - ORD

MANORD

Manchester

Thu 5/2

12:55-16:45

2 stops33h 50m

Chicago O'Hare Intl

Tue 10/2

10:40-09:30

2 stops16h 50m

£467

ManchesterChicago

MAN - ORD

MANORD

Manchester

Thu 25/12

10:10-16:45

1 stop12h 35m

Chicago O'Hare Intl

Wed 7/1

19:20-18:35

1 stop17h 15m

£473

Flights are sorted by cheapest return flights first.

Deals found on 26/11

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 £39). Flying from United Kingdom to Illinois in July is currently the most expensive (average of £474). 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 November 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 27 November 2025.

The most flights from GB0 to USIL are scheduled on a Monday (43 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (24 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 November 2025.
Read through reviews of airlines operating flights from the United Kingdom to Illinois, such as Finnair, Aer Lingus, andIcelandair. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,334 reviews
Check prices

Crew

8.1

Entertainment

6.9

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,334 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Crew

8.1

Entertainment

6.9

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Aer Lingus
7.2
Good
1,382 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Crew

8.1

Entertainment

6.9

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Icelandair
7.0
Good
581 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Crew

8.1

Entertainment

6.9

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Lufthansa
6.8
Okay
7,594 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Crew

8.1

Entertainment

6.9

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
British Airways
6.7
Okay
7,539 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Crew

8.1

Entertainment

6.9

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

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 11h 10m. Scandinavian Airlines provides one of the quickest options available for as low as £462. 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?

    £319 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Lufthansa and Finnair, with prices starting from £357 and £359, 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 £39). Flying from United Kingdom to Illinois in July is currently the most expensive (average of £474). 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 November 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£291Average£565FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£351Average£610FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£366Average£481FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£372Average£711FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£375Average£625FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
British AirwaysCheapest£385Average£558FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Brussels AirlinesCheapest£392Average£552FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£402Average£634FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£411Average£611FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£416Average£665FlexibilityNo 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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