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Cheap flights from the United Kingdom to Illinois from £276

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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
7 Dec — 14 Dec1
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 7 November 2025.

Mon 24/1106:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Mon 8/1219:20ORD - LHR
1 stop16h 20mScandinavian Airlines
Deal found 6/11£409
Thu 4/1206:40LHR - ORD
2 stops16h 05mScandinavian Airlines
Wed 14/119:20ORD - LHR
2 stops17h 30mScandinavian Airlines
Deal found 6/11£410
Thu 20/1106:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Sun 23/1119:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 5/11£412
Wed 3/1206:00LHR - ORD
1 stop15h 00mTAP AIR PORTUGAL
Sun 7/1220:25ORD - LHR
1 stop19h 10mTAP AIR PORTUGAL
Deal found 6/11£412
Mon 24/1106:30STN - ORD
2 stops16h 50mMultiple Airlines
Mon 1/1218:30ORD - STN
2 stops20h 50mMultiple Airlines
Deal found 7/11£412
Fri 5/1214:00LGW - ORD
2 stops27h 08mMultiple Airlines
Mon 8/1208:36ORD - LGW
1 stop15h 24mMultiple Airlines
Deal found 6/11£413
Fri 21/1106:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Sat 29/1119:20ORD - LHR
1 stop20h 20mScandinavian Airlines
Deal found 5/11£415
Wed 26/1110:20LHR - ORD
1 stop12h 25mScandinavian Airlines
Sun 30/1119:20ORD - LHR
1 stop17h 10mScandinavian Airlines
Deal found 6/11£416
Fri 21/1105:50LTN - ORD
2 stops17h 30mMultiple Airlines
Fri 28/1118:30ORD - LTN
2 stops19h 40mMultiple Airlines
Deal found 6/11£416
Wed 3/1206:00LHR - ORD
1 stop15h 00mTAP AIR PORTUGAL
Wed 14/119:10ORD - LHR
1 stop14h 20mTAP AIR PORTUGAL
Deal found 6/11£417
Fri 5/1210:20LHR - ORD
1 stop12h 25mScandinavian Airlines
Thu 5/219:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 5/11£418
Fri 21/1106:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Mon 24/1119:20ORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 5/11£419

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 7 November 2025.

Round-trip from

£409

One-way from

£276

Popular in

July

Cheapest in

February

Average price

£492

Good round-trip deal

£582 or less

Good one-way deal

£460 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 24/11-8/12
  • 2 total stops
  • 32h 25m total
  • United Kingdom to Illinois
Search Deals
6/12
  • 6/12
  • 2 total stops
  • 32h 15m total
  • United Kingdom to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£62 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 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 7 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

LHR - ORD

LHRORD

London Heathrow

Mon 2/3

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Sun 8/3

20:20-18:50

2 stops17h 30m

£410

LondonChicago

STN - ORD

STNORD

London Stansted

Mon 24/11

06:30-17:20

2 stops16h 50m

Chicago O'Hare Intl

Mon 1/12

18:30-21:20

2 stops20h 50m

£412

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 7/2

17:30-16:55

2 stops29h 25m

Chicago O'Hare Intl

Sat 14/2

19:20-19:55

2 stops18h 35m

£412

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 1/5

18:45-16:15

1 stop27h 30m

Chicago O'Hare Intl

Sun 10/5

18:00-12:45

1 stop12h 45m

£415

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 23/11

06:40-16:45

2 stops16h 05m

Chicago O'Hare Intl

Sun 30/11

19:20-18:30

1 stop17h 10m

£419

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 20/3

07:05-17:45

2 stops15h 40m

Chicago O'Hare Intl

Sun 22/3

20:20-17:40

1 stop16h 20m

£421

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 20/11

21:05-16:45

2 stops25h 40m

Chicago O'Hare Intl

Mon 8/12

19:20-16:25

2 stops15h 05m

£425

LondonChicago

LTN - ORD

LTNORD

London Luton

Fri 5/12

05:50-17:55

1 stop18h 05m

Chicago O'Hare Intl

Fri 12/12

15:50-15:25

1 stop17h 35m

£427

LondonChicago

STN - ORD

STNORD

London Stansted

Wed 3/12

20:55-17:55

2 stops27h 00m

Chicago O'Hare Intl

Wed 10/12

15:50-18:00

2 stops20h 10m

£427

LondonChicago

STN - ORD

STNORD

London Stansted

Sun 23/11

06:30-17:55

1 stop17h 25m

Chicago O'Hare Intl

Sun 30/11

19:40-16:35

1 stop14h 55m

£428

Flights are sorted by cheapest return flights first.

Deals found on 5/11

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, September is the cheapest month in which you can book a flight from United Kingdom to Illinois (average of £156). Flying from United Kingdom to Illinois in July is currently the most expensive (average of £478). 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 7 November 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 14% 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 7 November 2025.

The most flights from GB0 to USIL are scheduled on a Friday (42 on average). You will have fewer flight options on Tuesday, 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 7 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
1,335 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Crew

8.1

Comfort

7.4

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
1,335 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Crew

8.1

Comfort

7.4

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
1,365 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Crew

8.1

Comfort

7.4

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
7.1
Good
572 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Crew

8.1

Comfort

7.4

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
7,558 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Crew

8.1

Comfort

7.4

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
7,500 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Crew

8.1

Comfort

7.4

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 25m. Scandinavian Airlines provides one of the quickest options available for as low as £445. The distance between United Kingdom and Illinois is about 3960 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?

    £331 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Air Canada and Iberia, with prices starting from £350 and £372, 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, September is the cheapest month in which you can book a flight from United Kingdom to Illinois (average of £156). Flying from United Kingdom to Illinois in July is currently the most expensive (average of £478). 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 7 November 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£322Average£570FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£354Average£617FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£369Average£479FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£378Average£631FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Aer LingusCheapest£379Average£701FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£388Average£563FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Brussels AirlinesCheapest£396Average£554FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£406Average£640FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£414Average£617FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£418Average£670FlexibilityNo 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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