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Cheap flights from the United Kingdom to Illinois from £244

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 27/5. 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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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
13:50 - 17:50
MAN
-
ORD
34h 00m
2 stops
Multiple Airlines Logo
19:25 - 11:40
ORD
-
MAN
10h 15m
1 stop
£488Multiple Airlines
Tue, 2 Jun - Thu, 17 Sep
Multiple Airlines Logo
21:25 - 18:15
MAN
-
ORD
26h 50m
2 stops
Multiple Airlines Logo
22:25 - 12:05
ORD
-
MAN
31h 40m
3 stops
£494Multiple Airlines
Wed, 27 May - Wed, 3 Jun
Icelandair Logo
15:40 - 21:25
LGW
-
ORD
11h 45m
1 stop
Icelandair Logo
19:25 - 14:40
ORD
-
LGW
13h 15m
1 stop
£495Icelandair
Wed, 16 Sep - Wed, 14 Oct
Icelandair Logo
15:40 - 21:25
LGW
-
ORD
11h 45m
1 stop
Icelandair Logo
22:25 - 14:40
ORD
-
LGW
10h 15m
1 stop
£497Icelandair
Wed, 13 May - Tue, 7 Jul
British Airways Logo
11:10 - 13:50
LHR
-
ORD
8h 40mdirect
British Airways Logo
19:05 - 09:05
ORD
-
LHR
8h 00mdirect
£511British Airways
Thu, 14 May - Tue, 26 May
Lufthansa Logo
09:15 - 19:55
LCY
-
ORD
16h 40m
1 stop
Lufthansa Logo
22:30 - 17:55
ORD
-
LCY
13h 25m
1 stop
£580Lufthansa
Wed, 2 Sep - Wed, 16 Sep
Lufthansa Logo
09:15 - 19:55
LCY
-
ORD
16h 40m
1 stop
Lufthansa Logo
22:30 - 17:55
ORD
-
LCY
13h 25m
1 stop
£588Lufthansa
Tue, 22 Sep - Tue, 29 Sep
British Airways Logo
12:55 - 20:26
LHR
-
STL
13h 31m
1 stop
British Airways Logo
12:47 - 06:55
STL
-
LHR
12h 08m
1 stop
£613British Airways
Wed, 2 Sep - Wed, 23 Sep
Virgin Atlantic Logo
06:30 - 18:31
LHR
-
MDW
18h 01m
2 stops
Virgin Atlantic Logo
13:05 - 07:15
MDW
-
LHR
12h 10m
1 stop
£626Virgin Atlantic
Wed, 9 Sep - Wed, 21 Oct
Virgin Atlantic Logo
10:45 - 18:33
LHR
-
MDW
13h 48m
1 stop
Virgin Atlantic Logo
19:13 - 13:05
MDW
-
LHR
11h 52m
1 stop
£629Virgin Atlantic
Wed, 13 May - Mon, 18 May

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Scandinavian Airlines flights from United Kingdom to Illinois

Our best Scandinavian Airlines deals on United Kingdom to Illinois flight tickets
Scandinavian Airlines
27 Apr
LHR06:40London Heathrow
15h 30m
1 stop
ORD16:10Chicago O'Hare Intl
1 May
ORD19:15Chicago O'Hare Intl
14h 45m
1 stop
LHR16:00London Heathrow
£530
Scandinavian Airlines
13 May
LHR06:40London Heathrow
15h 30m
1 stop
ORD16:10Chicago O'Hare Intl
3 Jun
ORD06:07Chicago O'Hare Intl
21h 28m
2 stops
LHR09:35London Heathrow
£534
Scandinavian Airlines
15 May
MAN09:35Manchester
12h 35m
1 stop
ORD16:10Chicago O'Hare Intl
24 May
ORD06:07Chicago O'Hare Intl
23h 58m
2 stops
MAN12:05Manchester
£562

JetBlue flights from United Kingdom to Illinois

Our best JetBlue deals on United Kingdom to Illinois flight tickets
JetBlue
2 May
LHR08:40London Heathrow
18h 56m
1 stop
ORD21:36Chicago O'Hare Intl
3 May
ORD06:00Chicago O'Hare Intl
18h 30m
1 stop
LHR06:30London Heathrow
£518
JetBlue
6 May
LHR08:40London Heathrow
18h 13m
1 stop
ORD20:53Chicago O'Hare Intl
11 May
ORD07:20Chicago O'Hare Intl
17h 10m
1 stop
LHR06:30London Heathrow
£519
JetBlue
29 Apr
LHR11:55London Heathrow
25h 46m
1 stop
ORD07:41Chicago O'Hare Intl
4 May
ORD06:00Chicago O'Hare Intl
18h 30m
1 stop
LHR06:30London Heathrow
£532

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 15 April 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

Tue 2/6

13:50-17:50

2 stops34h 00m

Chicago O'Hare Intl

Thu 17/9

19:25-11:40

1 stop10h 15m

£488

ManchesterChicago

MAN - ORD

MANORD

Manchester

Wed 27/5

21:25-18:15

2 stops26h 50m

Chicago O'Hare Intl

Wed 3/6

22:25-12:05

3 stops31h 40m

£494

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 16/9

15:40-21:25

1 stop11h 45m

Chicago O'Hare Intl

Wed 14/10

19:25-14:40

1 stop13h 15m

£495

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 13/5

15:40-21:25

1 stop11h 45m

Chicago O'Hare Intl

Tue 7/7

22:25-14:40

1 stop10h 15m

£497
Fastest return journey

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 14/5

11:10-13:50

Nonstop8h 40m

Chicago O'Hare Intl

Tue 26/5

19:05-09:05

Nonstop8h 00m

£511

LondonChicago

LCY - ORD

LCYORD

London City

Wed 2/9

09:15-19:55

1 stop16h 40m

Chicago O'Hare Intl

Wed 16/9

22:30-17:55

1 stop13h 25m

£580

LondonChicago

LCY - ORD

LCYORD

London City

Tue 22/9

09:15-19:55

1 stop16h 40m

Chicago O'Hare Intl

Tue 29/9

22:30-17:55

1 stop13h 25m

£588

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 2/9

12:55-20:26

1 stop13h 31m

Lambert-St Louis

Wed 23/9

12:47-06:55

1 stop12h 08m

£613

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Wed 9/9

06:30-18:31

2 stops18h 01m

Chicago Midway

Wed 21/10

13:05-07:15

1 stop12h 10m

£626

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Wed 13/5

10:45-18:33

1 stop13h 48m

Chicago Midway

Mon 18/5

19:13-13:05

1 stop11h 52m

£629

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 September is, on average, the cheapest month to fly to Illinois from United Kingdom, with most prices found around £427. If you aren’t able to travel to Illinois during the month of September, then flying in February is also cheap. Prices for this month can be found on momondo for an average of £428.

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 £632. 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 £664. 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 £636. In the afternoon is when there is more demand to fly to Illinois, so prices are often more expensive at around £658 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 £564 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 £441 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

£518

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 £518. The best return flight deal from United Kingdom to Illinois found on momondo in the last 72 hours is £620.
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
5,336 reviews
Search Ryanair flights
IcelandairPriceFrom £284Free CancellationRating
7.0
634 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom £342Free CancellationRating
7.5
687 reviews
Search Virgin Atlantic flights
Aer LingusPriceFrom £360Free CancellationRating
7.2
1,509 reviews
Search Aer Lingus flights
Scandinavian AirlinesPriceFrom £366Free CancellationRating
7.3
1,750 reviews
Search Scandinavian Airlines flights
TAP AIR PORTUGALPriceFrom £382Free CancellationRating
7.1
2,205 reviews
Search TAP AIR PORTUGAL flights
Brussels AirlinesPriceFrom £391Free CancellationRating
7.2
401 reviews
Search Brussels Airlines flights
British AirwaysPriceFrom £391Free CancellationRating
6.7
7,885 reviews
Search British Airways flights
LufthansaPriceFrom £393Free CancellationRating
6.8
7,927 reviews
Search Lufthansa flights
Austrian AirlinesPriceFrom £400Free CancellationRating
7.6
904 reviews
Search Austrian 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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