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Cheap flights from the United Kingdom to Illinois from £248

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 21/9. 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

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:00 - 19:52
MAN
-
ORD
19h 52m
2 stops
Multiple Airlines Logo
22:25 - 11:40
ORD
-
MAN
31h 15m
1 stop
£490Multiple Airlines
Thu, 9 Jul - Sat, 25 Jul
Multiple Airlines Logo
06:55 - 17:50
MAN
-
ORD
16h 55m
2 stops
Multiple Airlines Logo
19:25 - 11:40
ORD
-
MAN
10h 15m
1 stop
£490Multiple Airlines
Thu, 10 Sep - Tue, 22 Sep
Multiple Airlines Logo
06:55 - 17:50
MAN
-
ORD
16h 55m
2 stops
Multiple Airlines Logo
19:25 - 11:40
ORD
-
MAN
10h 15m
1 stop
£500Multiple Airlines
Thu, 24 Sep - Sun, 11 Oct
Scandinavian Airlines Logo
10:10 - 16:45
MAN
-
ORD
12h 35m
1 stop
Scandinavian Airlines Logo
19:15 - 18:35
ORD
-
MAN
17h 20m
1 stop
£515Scandinavian Airlines
Mon, 23 Nov - Tue, 1 Dec
Scandinavian Airlines Logo
09:35 - 16:10
MAN
-
ORD
12h 35m
1 stop
Scandinavian Airlines Logo
19:15 - 20:30
ORD
-
MAN
19h 15m
2 stops
£518Scandinavian Airlines
Wed, 7 Oct - Wed, 14 Oct
Icelandair Logo
13:05 - 18:15
LHR
-
ORD
11h 10m
1 stop
Icelandair Logo
19:25 - 20:20
ORD
-
LHR
18h 55m
1 stop
£522Icelandair
Thu, 10 Sep - Thu, 24 Sep
Virgin Atlantic Logo
15:15 - 22:36
LHR
-
MDW
13h 21m
1 stop
Virgin Atlantic Logo
13:00 - 07:15
MDW
-
LHR
12h 15m
1 stop
£612Virgin Atlantic
Tue, 1 Sep - Tue, 15 Sep
Virgin Atlantic Logo
09:20 - 16:11
LHR
-
MDW
12h 51m
1 stop
Virgin Atlantic Logo
13:05 - 06:25
MDW
-
LHR
11h 20m
1 stop
£613Virgin Atlantic
Wed, 30 Sep - Wed, 7 Oct
British Airways Logo
12:00 - 18:59
LHR
-
STL
12h 59m
1 stop
British Airways Logo
15:35 - 06:20
STL
-
LHR
32h 45m
1 stop
£727British Airways
Wed, 2 Sep - Sun, 6 Sep
British Airways Logo
16:25 - 19:30
LHR
-
STL
9h 05mdirect
British Airways Logo
21:35 - 11:35
STL
-
LHR
8h 00mdirect
£738British Airways
Wed, 16 Sep - Wed, 23 Sep

KLM flights from United Kingdom to Illinois

Our best KLM deals on United Kingdom to Illinois flight tickets
KLM
7 Oct
LHR09:20London Heathrow
13h 05m
1 stop
MDW16:25Chicago Midway
13 Oct
MDW13:05Chicago Midway
11h 20m
1 stop
LHR06:25London Heathrow
£620
KLM
7 Oct
LHR10:45London Heathrow
13h 52m
1 stop
MDW18:37Chicago Midway
21 Oct
MDW13:05Chicago Midway
11h 20m
1 stop
LHR06:25London Heathrow
£640
KLM
1 Sept
LHR10:45London Heathrow
12h 14m
1 stop
MDW16:59Chicago Midway
14 Sept
MDW13:00Chicago Midway
11h 25m
1 stop
LHR06:25London Heathrow
£646

TAP AIR PORTUGAL flights from United Kingdom to Illinois

Our best TAP AIR PORTUGAL deals on United Kingdom to Illinois flight tickets
TAP AIR PORTUGAL
14 Oct
LGW16:25London Gatwick
26h 15m
1 stop
ORD12:40Chicago O'Hare Intl
21 Oct
ORD18:00Chicago O'Hare Intl
35h 20m
2 stops
LGW11:20London Gatwick
£523
TAP AIR PORTUGAL
14 Oct
LGW16:25London Gatwick
26h 15m
1 stop
ORD12:40Chicago O'Hare Intl
21 Oct
ORD18:00Chicago O'Hare Intl
20h 30m
2 stops
LGW20:30London Gatwick
£524
TAP AIR PORTUGAL
10 Oct
LGW16:30London Gatwick
29h 30m
1 stop
ORD16:00Chicago O'Hare Intl
17 Oct
ORD18:05Chicago O'Hare Intl
20h 20m
2 stops
LGW20:25London Gatwick
£525

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 28 May 2026.
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

Cheapest return flight

ManchesterChicago

MAN - ORD

MANORD

Manchester

Thu 9/7

06:00-19:52

2 stops19h 52m

Chicago O'Hare Intl

Sat 25/7

22:25-11:40

1 stop31h 15m

£490

ManchesterChicago

MAN - ORD

MANORD

Manchester

Thu 10/9

06:55-17:50

2 stops16h 55m

Chicago O'Hare Intl

Tue 22/9

19:25-11:40

1 stop10h 15m

£490

ManchesterChicago

MAN - ORD

MANORD

Manchester

Thu 24/9

06:55-17:50

2 stops16h 55m

Chicago O'Hare Intl

Sun 11/10

19:25-11:40

1 stop10h 15m

£500

ManchesterChicago

MAN - ORD

MANORD

Manchester

Mon 23/11

10:10-16:45

1 stop12h 35m

Chicago O'Hare Intl

Tue 1/12

19:15-18:35

1 stop17h 20m

£515

ManchesterChicago

MAN - ORD

MANORD

Manchester

Wed 7/10

09:35-16:10

1 stop12h 35m

Chicago O'Hare Intl

Wed 14/10

19:15-20:30

2 stops19h 15m

£518

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 10/9

13:05-18:15

1 stop11h 10m

Chicago O'Hare Intl

Thu 24/9

19:25-20:20

1 stop18h 55m

£522

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Tue 1/9

15:15-22:36

1 stop13h 21m

Chicago Midway

Tue 15/9

13:00-07:15

1 stop12h 15m

£612

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Wed 30/9

09:20-16:11

1 stop12h 51m

Chicago Midway

Wed 7/10

13:05-06:25

1 stop11h 20m

£613

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 2/9

12:00-18:59

1 stop12h 59m

Lambert-St Louis

Sun 6/9

15:35-06:20

1 stop32h 45m

£727
Fastest return journey

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 16/9

16:25-19:30

Nonstop9h 05m

Lambert-St Louis

Wed 23/9

21:35-11:35

Nonstop8h 00m

£738

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 November is, on average, the cheapest month to fly to Illinois from United Kingdom, with most prices found around £440. If you aren’t able to travel to Illinois during the month of November, then flying in February is also cheap. Prices for this month can be found on momondo for an average of £470.

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 £655. 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 Sunday will generally be more expensive and average around £679. 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 at midday. Our users have found flights to Illinois at midday for as low as £653. In the afternoon is when there is more demand to fly to Illinois, so prices are often more expensive at around £680 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 £582 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 £476 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?

No. A direct flight is the cheapest option for a flight between United Kingdom to Illinois.

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

£579

Fastest flight time

8h 30m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from United Kingdom in the past 72 hours is £579. The best return flight deal from United Kingdom to Illinois found on momondo in the last 72 hours is £701.
The fastest flight from United Kingdom to Illinois takes 8h 30m
Direct flights go from United Kingdom to Illinois every day.
There are 98 airports in Illinois. From United Kingdom there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

Frequently asked questions about flying from the United Kingdom to Illinois

  • 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
RyanairPriceFrom £37Free CancellationRating
6.9
5,381 reviews
Search Ryanair flights
IcelandairPriceFrom £286Free CancellationRating
7.0
661 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom £345Free CancellationRating
7.5
689 reviews
Search Virgin Atlantic flights
Turkish AirlinesPriceFrom £348Free CancellationRating
7.4
4,398 reviews
Search Turkish Airlines flights
Aer LingusPriceFrom £364Free CancellationRating
7.3
1,587 reviews
Search Aer Lingus flights
Scandinavian AirlinesPriceFrom £376Free CancellationRating
7.4
1,796 reviews
Search Scandinavian Airlines flights
TAP AIR PORTUGALPriceFrom £386Free CancellationRating
7.2
2,262 reviews
Search TAP AIR PORTUGAL flights
Brussels AirlinesPriceFrom £395Free CancellationRating
7.2
408 reviews
Search Brussels Airlines flights
British AirwaysPriceFrom £395Free CancellationRating
6.7
8,008 reviews
Search British Airways flights
LufthansaPriceFrom £399Free CancellationRating
6.8
8,032 reviews
Search Lufthansa 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

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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