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Cheap flights from the United Kingdom to Illinois from £260

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to Illinois departing on 22/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from the United Kingdom to Illinois

Recent return flight deals from the United Kingdom to Illinois

Air Canada Logo
06:50 - 18:45LHR-ORD
16h 55m2 stops
Air Canada Logo
12:50 - 07:10ORD-LHR
12h 20m1 stop
£393Air Canada
Find Deal
Sat, 1 Nov - Sat, 15 Nov
Multiple Airlines Logo
09:50 - 07:13LGW-ORD
27h 23m2 stops
Multiple Airlines Logo
10:15 - 06:00ORD-LGW
13h 45m1 stop
£394Multiple Airlines
Find Deal
Tue, 27 Jan - Mon, 2 Feb
United Airlines Logo
06:50 - 12:10LHR-ORD
11h 20m1 stop
United Airlines Logo
17:50 - 07:55ORD-LHR
8h 05mdirect
£394United Airlines
Find Deal
Sun, 15 Feb - Sun, 22 Feb
Icelandair Logo
11:55 - 18:20LGW-ORD
11h 25m1 stop
Icelandair Logo
18:30 - 10:55ORD-LGW
10h 25m1 stop
£395Icelandair
Find Deal
Wed, 29 Oct - Thu, 20 Nov
British Airways Logo
10:40 - 20:00LGW-ORD
15h 20m1 stop
British Airways Logo
13:43 - 08:10ORD-LGW
12h 27m1 stop
£400British Airways
Find Deal
Wed, 8 Oct - Wed, 15 Oct
British Airways Logo
10:40 - 20:00LGW-ORD
15h 20m1 stop
British Airways Logo
13:40 - 08:10ORD-LGW
12h 30m1 stop
£401British Airways
Find Deal
Tue, 7 Oct - Sat, 18 Oct
Icelandair Logo
15:40 - 21:15LGW-ORD
11h 35m1 stop
Icelandair Logo
19:25 - 14:40ORD-LGW
13h 15m1 stop
£405Icelandair
Find Deal
Wed, 15 Oct - Tue, 21 Oct
Lufthansa Logo
09:55 - 21:05LCY-ORD
16h 10m1 stop
Lufthansa Logo
22:35 - 16:40ORD-LCY
12h 05m1 stop
£405Lufthansa
Find Deal
Fri, 31 Oct - Mon, 3 Nov
Lufthansa Logo
09:40 - 20:05LCY-ORD
16h 25m1 stop
Lufthansa Logo
22:35 - 16:40ORD-LCY
12h 05m1 stop
£406Lufthansa
Find Deal
Thu, 6 Nov - Mon, 10 Nov
Aer Lingus Logo
08:10 - 14:00MAN-ORD
11h 50m1 stop
Aer Lingus Logo
15:45 - 07:35ORD-MAN
9h 50m1 stop
£482Aer Lingus
Find Deal
Tue, 14 Oct - Tue, 21 Oct

Air Canada flights from United Kingdom to Illinois

Our best Air Canada deals on United Kingdom to Illinois flight tickets
Air Canada
1 Nov
LHR06:50London Heathrow
16h 55m
2 stops
ORD18:45Chicago O'Hare Intl
15 Nov
ORD12:50Chicago O'Hare Intl
12h 20m
1 stop
LHR07:10London Heathrow
£393
Find similar
Air Canada
6 Nov
LHR06:50London Heathrow
14h 05m
2 stops
ORD14:55Chicago O'Hare Intl
25 Nov
ORD10:00Chicago O'Hare Intl
15h 10m
2 stops
LHR07:10London Heathrow
£397
Find similar
Air Canada
30 Sept
LHR09:30London Heathrow
15h 59m
2 stops
ORD19:29Chicago O'Hare Intl
14 Oct
ORD10:40Chicago O'Hare Intl
13h 50m
1 stop
LHR06:30London Heathrow
£418
Find similar

United Airlines flights from United Kingdom to Illinois

Our best United Airlines deals on United Kingdom to Illinois flight tickets
United Airlines
15 Feb
LHR06:50London Heathrow
11h 20m
1 stop
ORD12:10Chicago O'Hare Intl
22 Feb
ORD17:50Chicago O'Hare Intl
8h 05m
LHR07:55London Heathrow
£394
Find similar
United Airlines
31 Oct
LHR13:30London Heathrow
15h 13m
2 stops
ORD23:43Chicago O'Hare Intl
2 Nov
ORD21:10Chicago O'Hare Intl
27h 30m
1 stop
LHR06:40London Heathrow
£395
Find similar
United Airlines
30 Oct
LHR11:30London Heathrow
17h 13m
2 stops
ORD23:43Chicago O'Hare Intl
2 Nov
ORD21:30Chicago O'Hare Intl
30h 10m
1 stop
LHR09:40London Heathrow
£397
Find similar

momondo 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, momondo users made 279,928 searches. Data last updated 24 September 2025.
Use the filters below to find and compare flights from the United Kingdom to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 1/11

06:50-18:45

2 stops16h 55m

Chicago O'Hare Intl

Sat 15/11

12:50-07:10

1 stop12h 20m

£393

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Tue 27/1

09:50-07:13

2 stops27h 23m

Chicago O'Hare Intl

Mon 2/2

10:15-06:00

1 stop13h 45m

£394

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 15/2

06:50-12:10

1 stop11h 20m

Chicago O'Hare Intl

Sun 22/2

17:50-07:55

Nonstop8h 05m

£394

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 29/10

11:55-18:20

1 stop11h 25m

Chicago O'Hare Intl

Thu 20/11

18:30-10:55

1 stop10h 25m

£395

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 8/10

10:40-20:00

1 stop15h 20m

Chicago O'Hare Intl

Wed 15/10

13:43-08:10

1 stop12h 27m

£400

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Tue 7/10

10:40-20:00

1 stop15h 20m

Chicago O'Hare Intl

Sat 18/10

13:40-08:10

1 stop12h 30m

£401

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 15/10

15:40-21:15

1 stop11h 35m

Chicago O'Hare Intl

Tue 21/10

19:25-14:40

1 stop13h 15m

£405

LondonChicago

LCY - ORD

LCYORD

London City

Fri 31/10

09:55-21:05

1 stop16h 10m

Chicago O'Hare Intl

Mon 3/11

22:35-16:40

1 stop12h 05m

£405

LondonChicago

LCY - ORD

LCYORD

London City

Thu 6/11

09:40-20:05

1 stop16h 25m

Chicago O'Hare Intl

Mon 10/11

22:35-16:40

1 stop12h 05m

£406

ManchesterChicago

MAN - ORD

MANORD

Manchester

Tue 14/10

08:10-14:00

1 stop11h 50m

Chicago O'Hare Intl

Tue 21/10

15:45-07:35

1 stop9h 50m

£482

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from United Kingdom to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

The month of February is, on average, the cheapest month to fly to Illinois from United Kingdom, with most prices found around £428. If you aren’t able to travel to Illinois during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of £439.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart on your flight to Illinois is on a Wednesday when prices can be found for as low as £603. This is often the case because there is less demand to fly during this day of the week. Flights from United Kingdom to Illinois on a Saturday will generally be more expensive and average around £660. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our data shows that the cheapest United Kingdom to Illinois flights are usually those with departure times in the evening. Our users have found flights to Illinois in the evening for as low as £553. In the afternoon is when there is more demand to fly to Illinois, so prices are often more expensive at around £661 per ticket.

What is the cheapest United Kingdom to Illinois flight route?

Fly from London Heathrow to Chicago O'Hare Intl for the best United Kingdom - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around £535 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from United Kingdom for as low as £512 on momondo.

What cabin class options are available on United Kingdom to Illinois flights?

There are 4 cabin classes available to choose from on United Kingdom to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on United Kingdom to Illinois flights?

You could potentially save up to 7% on your flight if you consider stops on a United Kingdom to Illinois flight.

Cheap United Kingdom to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United Kingdom to Illinois

Best price found

£487

Fastest flight time

8h 25m

Direct flights

Every day

Airports in Illinois

1 airport
The best one-way flight to Illinois from United Kingdom in the past 72 hours is £487. The best return flight deal from United Kingdom to Illinois found on momondo in the last 72 hours is £491.
The fastest flight from United Kingdom to Illinois takes 8h 25m
Direct flights go from United Kingdom to Illinois every day.
There is 1 airport near Illinois: Chicago O'Hare Intl (ORD)
Search flight deals

  • When did momondo last update prices for flights from United Kingdom to Illinois?

    Prices for flights from United Kingdom to Illinois are updated daily.

  • How many operators does momondo search for flights from United Kingdom to Illinois?

  • How old do you have to be to fly from United Kingdom to Illinois?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United Kingdom to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from United Kingdom to Illinois?

Best airlines flying from United Kingdom to Illinois

Compare and see reviews for airlines that fly from United Kingdom to Illinois with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom £310Free CancellationRating
7.0
545 reviews
Search Icelandair flights
Aer LingusPriceFrom £325Free CancellationRating
7.2
1,296 reviews
Search Aer Lingus flights
Scandinavian AirlinesPriceFrom £352Free CancellationRating
7.4
1,492 reviews
Search Scandinavian Airlines flights
Virgin AtlanticPriceFrom £359Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
TAP AIR PORTUGALPriceFrom £366Free CancellationRating
7.1
1,988 reviews
Search TAP AIR PORTUGAL flights
British AirwaysPriceFrom £376Free CancellationRating
6.7
7,394 reviews
Search British Airways flights
Brussels AirlinesPriceFrom £391Free CancellationRating
7.2
361 reviews
Search Brussels Airlines flights
LufthansaPriceFrom £393Free CancellationRating
6.8
7,423 reviews
Search Lufthansa flights
Austrian AirlinesPriceFrom £399Free CancellationRating
7.6
853 reviews
Search Austrian Airlines flights
United AirlinesPriceFrom £404Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from United Kingdom to Illinois?

Finding the right flight to Illinois from United Kingdom is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

Can I find flights from United Kingdom to Illinois with flexible booking policies on momondo?

Flights from United Kingdom to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from United Kingdom to Illinois?

Once you have performed a search for United Kingdom to Illinois flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from United Kingdom to Illinois right now. Can momondo alert me if prices change?

If you are not ready to book a flight from United Kingdom to Illinois now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Illinois and let you know when they change.

An easier way to manage your Illinois trip

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