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Cheap flights from the United Kingdom to Illinois from $331

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 5/27. 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 round-trip flight deals from the United Kingdom to Illinois

Enter your travel dates to find the best prices.
Multiple Airlines Logo
1:50 pm - 5:50 pm
MAN
-
ORD
34h 00m
2 stops
Multiple Airlines Logo
7:25 pm - 11:40 am
ORD
-
MAN
10h 15m
1 stop
$661Multiple Airlines
Tue, Jun 2 - Thu, Sep 17
Icelandair Logo
9:25 pm - 6:15 pm
LHR
-
ORD
26h 50m
1 stop
Icelandair Logo
7:25 pm - 11:55 am
ORD
-
LHR
10h 30m
1 stop
$670Icelandair
Fri, May 1 - Sun, May 10
Multiple Airlines Logo
9:25 pm - 6:15 pm
MAN
-
ORD
26h 50m
2 stops
Multiple Airlines Logo
10:25 pm - 12:05 pm
ORD
-
MAN
31h 40m
3 stops
$670Multiple Airlines
Wed, May 27 - Wed, Jun 3
Icelandair Logo
3:40 pm - 9:25 pm
LGW
-
ORD
11h 45m
1 stop
Icelandair Logo
10:25 pm - 2:40 pm
ORD
-
LGW
10h 15m
1 stop
$673Icelandair
Wed, May 13 - Tue, Jul 7
JetBlue Logo
11:30 am - 8:53 pm
EDI
-
ORD
15h 23m
1 stop
JetBlue Logo
9:49 am - 10:00 am
ORD
-
EDI
18h 11m
1 stop
$729JetBlue
Tue, May 12 - Tue, May 19
JetBlue Logo
12:10 pm - 7:44 am
EDI
-
ORD
25h 34m
1 stop
JetBlue Logo
8:30 pm - 10:00 am
ORD
-
EDI
31h 30m
1 stop
$730JetBlue
Sun, May 17 - Sun, May 31
SWISS Logo
9:15 am - 3:55 pm
LCY
-
ORD
12h 40m
1 stop
SWISS Logo
2:30 pm - 8:40 am
ORD
-
LCY
12h 10m
1 stop
$779SWISS
Wed, Oct 7 - Tue, Oct 13
SWISS Logo
9:15 am - 3:55 pm
LCY
-
ORD
12h 40m
1 stop
SWISS Logo
7:05 pm - 12:35 pm
ORD
-
LCY
11h 30m
1 stop
$787SWISS
Mon, Sep 7 - Tue, Sep 15
American Airlines Logo
9:45 am - 4:00 pm
LHR
-
STL
12h 15m
1 stop
American Airlines Logo
12:39 pm - 9:05 am
STL
-
LHR
14h 26m
1 stop
$825American Airlines
Thu, May 7 - Sat, May 23
American Airlines Logo
12:00 pm - 7:30 pm
LHR
-
STL
13h 30m
1 stop
American Airlines Logo
10:23 am - 6:55 am
STL
-
LHR
14h 32m
1 stop
$838American Airlines
Thu, May 7 - Tue, May 19

JetBlue flights from United Kingdom to Illinois

Our best JetBlue deals on United Kingdom to Illinois flight tickets
JetBlue
Apr 30
LHR8:40 amLondon Heathrow
18h 56m
1 stop
ORD9:36 pmChicago O'Hare Intl
May 5
ORD7:21 amChicago O'Hare Intl
17h 09m
1 stop
LHR6:30 amLondon Heathrow
$697
JetBlue
May 2
LHR8:40 amLondon Heathrow
18h 56m
1 stop
ORD9:36 pmChicago O'Hare Intl
May 3
ORD6:00 amChicago O'Hare Intl
18h 30m
1 stop
LHR6:30 amLondon Heathrow
$702
JetBlue
May 6
LHR8:40 amLondon Heathrow
18h 13m
1 stop
ORD8:53 pmChicago O'Hare Intl
May 11
ORD7:20 amChicago O'Hare Intl
17h 10m
1 stop
LHR6:30 amLondon Heathrow
$703

Icelandair flights from United Kingdom to Illinois

Our best Icelandair deals on United Kingdom to Illinois flight tickets
Icelandair
Apr 22
LHR9:25 pmLondon Heathrow
26h 50m
1 stop
ORD6:15 pmChicago O'Hare Intl
Apr 28
ORD7:25 pmChicago O'Hare Intl
18h 55m
1 stop
LHR8:20 pmLondon Heathrow
$669
Icelandair
May 1
LHR9:25 pmLondon Heathrow
26h 50m
1 stop
ORD6:15 pmChicago O'Hare Intl
May 10
ORD7:25 pmChicago O'Hare Intl
10h 30m
1 stop
LHR11:55 amLondon Heathrow
$670
Icelandair
Sep 16
LGW3:40 pmLondon Gatwick
11h 45m
1 stop
ORD9:25 pmChicago O'Hare Intl
Oct 14
ORD7:25 pmChicago O'Hare Intl
13h 15m
1 stop
LGW2:40 pmLondon Gatwick
$671

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated April 14, 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 round-trip

ManchesterChicago

MAN - ORD

MANORD

Manchester

Tue 6/2

1:50 pm-5:50 pm

2 stops34h 00m

Chicago O'Hare Intl

Thu 9/17

7:25 pm-11:40 am

1 stop10h 15m

$661

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 5/1

9:25 pm-6:15 pm

1 stop26h 50m

Chicago O'Hare Intl

Sun 5/10

7:25 pm-11:55 am

1 stop10h 30m

$670

ManchesterChicago

MAN - ORD

MANORD

Manchester

Wed 5/27

9:25 pm-6:15 pm

2 stops26h 50m

Chicago O'Hare Intl

Wed 6/3

10:25 pm-12:05 pm

3 stops31h 40m

$670
Quickest round-trip

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 5/13

3:40 pm-9:25 pm

1 stop11h 45m

Chicago O'Hare Intl

Tue 7/7

10:25 pm-2:40 pm

1 stop10h 15m

$673

EdinburghChicago

EDI - ORD

EDIORD

Edinburgh Turnhouse

Tue 5/12

11:30 am-8:53 pm

1 stop15h 23m

Chicago O'Hare Intl

Tue 5/19

9:49 am-10:00 am

1 stop18h 11m

$729

EdinburghChicago

EDI - ORD

EDIORD

Edinburgh Turnhouse

Sun 5/17

12:10 pm-7:44 am

1 stop25h 34m

Chicago O'Hare Intl

Sun 5/31

8:30 pm-10:00 am

1 stop31h 30m

$730

LondonChicago

LCY - ORD

LCYORD

London City

Wed 10/7

9:15 am-3:55 pm

1 stop12h 40m

Chicago O'Hare Intl

Tue 10/13

2:30 pm-8:40 am

1 stop12h 10m

$779

LondonChicago

LCY - ORD

LCYORD

London City

Mon 9/7

9:15 am-3:55 pm

1 stop12h 40m

Chicago O'Hare Intl

Tue 9/15

7:05 pm-12:35 pm

1 stop11h 30m

$787

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 5/7

9:45 am-4:00 pm

1 stop12h 15m

Lambert-St Louis

Sat 5/23

12:39 pm-9:05 am

1 stop14h 26m

$825

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 5/7

12:00 pm-7:30 pm

1 stop13h 30m

Lambert-St Louis

Tue 5/19

10:23 am-6:55 am

1 stop14h 32m

$838

Flights are sorted by cheapest round-trip 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 cheapest month to fly to Illinois from United Kingdom is in September. Flight prices, which tend to average around $579, are often lower during this time because this is during the off-season. 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 $580.

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

The cheapest day to depart from United Kingdom to Illinois is on a Friday when prices can be found for as low as $821. Flights from United Kingdom to Illinois on a Saturday will generally be more expensive and average around $928. 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 most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from United Kingdom to Illinois during this time can be as low as $863. Flights in the afternoon are often more expensive with an average ticket price of $955.

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 $764 when searching weeks out. 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 $598 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 23% 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

$690

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 $690. The best round-trip flight deal from United Kingdom to Illinois found on momondo in the last 72 hours is $900.
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 for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for 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
Aer LingusPriceFrom $446Free CancellationRating
7.2
1,507 reviews
Search Aer Lingus flights
Scandinavian AirlinesPriceFrom $468Free CancellationRating
7.3
1,749 reviews
Search Scandinavian Airlines flights
United AirlinesPriceFrom $485Free CancellationRating
7.4
9,581 reviews
Search United Airlines flights
IcelandairPriceFrom $494Free CancellationRating
7.0
632 reviews
Search Icelandair flights
Austrian AirlinesPriceFrom $530Free CancellationRating
7.6
904 reviews
Search Austrian Airlines flights
British AirwaysPriceFrom $531Free CancellationRating
6.7
7,882 reviews
Search British Airways flights
American AirlinesPriceFrom $583Free CancellationRating
7.1
11,571 reviews
Search American Airlines flights
IberiaPriceFrom $599Free CancellationRating
7.0
3,179 reviews
Search Iberia flights
LufthansaPriceFrom $618Free CancellationRating
6.8
7,920 reviews
Search Lufthansa flights
TAP AIR PORTUGALPriceFrom $653Free CancellationRating
7.1
2,203 reviews
Search TAP AIR PORTUGAL 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?

momondo helps you find the best flight between United Kingdom and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of United Kingdom to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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