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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 9/10. 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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Find the cheapest flights from the United Kingdom to Illinois

Recent round-trip flight deals from the United Kingdom to Illinois

Logo
2:00 pm - 4:12 pmLGW-ORD
32h 12m1 stop
Logo
5:17 pm - 10:00 amORD-LGW
34h 43m1 stop
$408
Find Deal
Wed, Sep 10 - Sun, Sep 21
Logo
2:00 pm - 4:12 pmLGW-ORD
32h 12m1 stop
Logo
6:30 am - 10:00 amORD-LGW
21h 30m1 stop
$409
Find Deal
Thu, Sep 11 - Mon, Sep 22
Icelandair Logo
3:35 pm - 9:15 pmLGW-ORD
11h 40m1 stop
Icelandair Logo
7:25 pm - 11:45 amORD-LGW
10h 20m1 stop
$463Icelandair
Find Deal
Wed, Aug 27 - Mon, Sep 8
Icelandair Logo
3:40 pm - 9:15 pmLGW-ORD
11h 35m1 stop
Icelandair Logo
7:25 pm - 11:45 amORD-LGW
10h 20m1 stop
$464Icelandair
Find Deal
Mon, Aug 25 - Sat, Sep 6
Aer Lingus Logo
8:50 am - 2:00 pmLHR-ORD
11h 10m1 stop
Aer Lingus Logo
9:15 pm - 1:55 pmORD-LHR
10h 40m1 stop
$486Aer Lingus
Find Deal
Sat, Sep 6 - Wed, Sep 10
Aer Lingus Logo
8:50 am - 2:00 pmLHR-ORD
11h 10m1 stop
Aer Lingus Logo
9:15 pm - 1:55 pmORD-LHR
10h 40m1 stop
$487Aer Lingus
Find Deal
Thu, Sep 18 - Sat, Oct 4
British Airways Logo
9:05 am - 3:45 pmLCY-ORD
12h 40m1 stop
British Airways Logo
10:15 pm - 9:40 pmORD-LCY
17h 25m1 stop
$601British Airways
Find Deal
Wed, Aug 20 - Sun, Sep 14
British Airways Logo
9:05 am - 3:45 pmLCY-ORD
12h 40m1 stop
British Airways Logo
10:15 pm - 6:25 pmORD-LCY
14h 10m1 stop
$604British Airways
Find Deal
Wed, Sep 3 - Sun, Sep 21
American Airlines Logo
8:55 am - 2:40 pmEDI-ORD
11h 45m1 stop
American Airlines Logo
5:40 pm - 10:40 amORD-EDI
11h 00m1 stop
$683American Airlines
Find Deal
Mon, Aug 25 - Mon, Sep 15
American Airlines Logo
8:55 am - 2:50 pmEDI-ORD
11h 55m1 stop
American Airlines Logo
5:40 pm - 10:40 amORD-EDI
11h 00m1 stop
$686American Airlines
Find Deal
Mon, Sep 22 - Mon, Oct 20

Icelandair flights from United Kingdom to Illinois

Our best Icelandair deals on United Kingdom to Illinois flight tickets
Icelandair
Aug 27
LGW3:35 pmLondon Gatwick
11h 40m
1 stop
ORD9:15 pmChicago O'Hare Intl
Sep 8
ORD7:25 pmChicago O'Hare Intl
10h 20m
1 stop
LGW11:45 amLondon Gatwick
$463
Find similar
Icelandair
Aug 25
LGW3:40 pmLondon Gatwick
11h 35m
1 stop
ORD9:15 pmChicago O'Hare Intl
Sep 6
ORD7:25 pmChicago O'Hare Intl
10h 20m
1 stop
LGW11:45 amLondon Gatwick
$464
Find similar
Icelandair
Aug 26
LGW1:00 pmLondon Gatwick
14h 15m
1 stop
ORD9:15 pmChicago O'Hare Intl
Sep 4
ORD10:15 pmChicago O'Hare Intl
31h 30m
1 stop
LGW11:45 amLondon Gatwick
$465
Find similar

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
Nov 6
LHR7:55 pmLondon Heathrow
25h 20m
1 stop
ORD3:15 pmChicago O'Hare Intl
Nov 12
ORD7:10 pmChicago O'Hare Intl
14h 20m
1 stop
LHR3:30 pmLondon Heathrow
$510
Find similar
TAP AIR PORTUGAL
Sep 17
LHR1:45 pmLondon Heathrow
27h 10m
1 stop
ORD10:55 amChicago O'Hare Intl
Sep 28
ORD6:00 pmChicago O'Hare Intl
22h 00m
1 stop
LHR10:00 pmLondon Heathrow
$519
Find similar

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 July 31, 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

LGW - ORD

LGWORD

London Gatwick

Wed 9/10

2:00 pm-4:12 pm

1 stop32h 12m

Chicago O'Hare Intl

Sun 9/21

5:17 pm-10:00 am

1 stop34h 43m

$408

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 9/11

2:00 pm-4:12 pm

1 stop32h 12m

Chicago O'Hare Intl

Mon 9/22

6:30 am-10:00 am

1 stop21h 30m

$409

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 8/27

3:35 pm-9:15 pm

1 stop11h 40m

Chicago O'Hare Intl

Mon 9/8

7:25 pm-11:45 am

1 stop10h 20m

$463

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Mon 8/25

3:40 pm-9:15 pm

1 stop11h 35m

Chicago O'Hare Intl

Sat 9/6

7:25 pm-11:45 am

1 stop10h 20m

$464

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 9/6

8:50 am-2:00 pm

1 stop11h 10m

Chicago O'Hare Intl

Wed 9/10

9:15 pm-1:55 pm

1 stop10h 40m

$486

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 9/18

8:50 am-2:00 pm

1 stop11h 10m

Chicago O'Hare Intl

Sat 10/4

9:15 pm-1:55 pm

1 stop10h 40m

$487

LondonChicago

LCY - ORD

LCYORD

London City

Wed 8/20

9:05 am-3:45 pm

1 stop12h 40m

Chicago O'Hare Intl

Sun 9/14

10:15 pm-9:40 pm

1 stop17h 25m

$601

LondonChicago

LCY - ORD

LCYORD

London City

Wed 9/3

9:05 am-3:45 pm

1 stop12h 40m

Chicago O'Hare Intl

Sun 9/21

10:15 pm-6:25 pm

1 stop14h 10m

$604

EdinburghChicago

EDI - ORD

EDIORD

Edinburgh Turnhouse

Mon 8/25

8:55 am-2:40 pm

1 stop11h 45m

Chicago O'Hare Intl

Mon 9/15

5:40 pm-10:40 am

1 stop11h 00m

$683

EdinburghChicago

EDI - ORD

EDIORD

Edinburgh Turnhouse

Mon 9/22

8:55 am-2:50 pm

1 stop11h 55m

Chicago O'Hare Intl

Mon 10/20

5:40 pm-10:40 am

1 stop11h 00m

$686

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 February. Flight prices, which tend to average around $580, 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 February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $607.

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 Wednesday when prices can be found for as low as $789. Flights from United Kingdom to Illinois on a Sunday will generally be more expensive and average around $938. 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 evening. Flights from United Kingdom to Illinois during this time can be as low as $620. Flights in the afternoon are often more expensive with an average ticket price of $954.

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 $738 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 $694 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 5% 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

$248

Fastest flight time

10h 00m

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 $248. The best round-trip flight deal from United Kingdom to Illinois found on momondo in the last 72 hours is $408.
The fastest flight from United Kingdom to Illinois takes 10h 00m
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 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
IcelandairPriceFrom $390Free CancellationRating
7.0
520 reviews
Search Icelandair flights
Scandinavian AirlinesPriceFrom $462Free CancellationRating
7.3
1,457 reviews
Search Scandinavian Airlines flights
United AirlinesPriceFrom $485Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
Aer LingusPriceFrom $504Free CancellationRating
7.1
1,192 reviews
Search Aer Lingus flights
British AirwaysPriceFrom $552Free CancellationRating
6.6
7,222 reviews
Search British Airways flights
TAP AIR PORTUGALPriceFrom $558Free CancellationRating
7.1
1,933 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $582Free CancellationRating
7.0
2,859 reviews
Search Iberia flights
American AirlinesPriceFrom $583Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Austrian AirlinesPriceFrom $586Free CancellationRating
7.6
823 reviews
Search Austrian Airlines flights
FinnairPriceFrom $607Free CancellationRating
7.6
1,316 reviews
Search Finnair 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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