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Cheap flights from Illinois to the United Kingdom from $219

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to the United Kingdom departing on 10/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to the United Kingdom

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:25 pm - 8:55 pm
ORD
-
LTN
16h 30m
2 stops
Multiple Airlines Logo
9:30 pm - 3:30 pm
LTN
-
ORD
24h 00m
2 stops
$693Multiple Airlines
Mon, Aug 24 - Tue, Nov 24
Multiple Airlines Logo
10:25 pm - 2:40 pm
ORD
-
LGW
10h 15m
1 stop
Multiple Airlines Logo
2:00 pm - 11:55 pm
LGW
-
ORD
15h 55m
1 stop
$694Multiple Airlines
Mon, Sep 7 - Wed, Sep 9
Scandinavian Airlines Logo
7:15 pm - 5:40 pm
ORD
-
LHR
16h 25m
1 stop
Scandinavian Airlines Logo
6:40 am - 4:10 pm
LHR
-
ORD
15h 30m
1 stop
$695Scandinavian Airlines
Mon, Sep 21 - Sat, Oct 3
Multiple Airlines Logo
7:25 pm - 12:20 am
ORD
-
STN
22h 55m
2 stops
Multiple Airlines Logo
6:30 am - 1:22 pm
STN
-
ORD
36h 52m
3 stops
$695Multiple Airlines
Mon, Aug 17 - Mon, Aug 24
Icelandair Logo
7:25 pm - 11:55 am
ORD
-
LHR
10h 30m
1 stop
Icelandair Logo
1:05 pm - 9:25 pm
LHR
-
ORD
14h 20m
1 stop
$697Icelandair
Sat, Oct 3 - Sun, Oct 11
Icelandair Logo
10:25 pm - 2:40 pm
ORD
-
LGW
10h 15m
1 stop
Icelandair Logo
3:40 pm - 9:25 pm
LGW
-
ORD
11h 45m
1 stop
$697Icelandair
Wed, Sep 30 - Wed, Oct 7
SWISS Logo
7:50 pm - 12:50 pm
ORD
-
LCY
12h 00m
1 stop
SWISS Logo
9:15 am - 4:20 pm
LCY
-
ORD
13h 05m
1 stop
$833SWISS
Wed, Oct 28 - Tue, Nov 3
SWISS Logo
2:20 pm - 8:40 am
ORD
-
LCY
12h 20m
1 stop
SWISS Logo
9:15 am - 5:20 pm
LCY
-
ORD
13h 05m
1 stop
$834SWISS
Wed, Oct 21 - Wed, Oct 28
Virgin Atlantic Logo
1:19 pm - 7:10 am
MDW
-
LHR
11h 51m
1 stop
Virgin Atlantic Logo
9:20 am - 4:15 pm
LHR
-
MDW
12h 55m
1 stop
$841Virgin Atlantic
Mon, Sep 28 - Sun, Oct 4
Virgin Atlantic Logo
1:19 pm - 7:10 am
MDW
-
LHR
11h 51m
1 stop
Virgin Atlantic Logo
9:20 am - 4:15 pm
LHR
-
MDW
12h 55m
1 stop
$843Virgin Atlantic
Mon, Sep 28 - Sun, Oct 4

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Delta flights from Illinois to United Kingdom

Our best Delta deals on Illinois to United Kingdom flight tickets
Delta
Oct 27
MDW5:15 pmChicago Midway
10h 45m
1 stop
LHR9:00 amLondon Heathrow
Nov 3
LHR6:30 amLondon Heathrow
16h 09m
2 stops
MDW4:39 pmChicago Midway
$865
Delta
Nov 2
MDW11:35 amChicago Midway
14h 15m
1 stop
LHR7:50 amLondon Heathrow
Nov 11
LHR6:30 amLondon Heathrow
16h 20m
2 stops
MDW4:50 pmChicago Midway
$866
Delta
Jul 29
STL9:24 amLambert-St Louis
15h 51m
1 stop
LHR7:15 amLondon Heathrow
Aug 26
LHR6:30 amLondon Heathrow
17h 57m
2 stops
STL6:27 pmLambert-St Louis
$1,045

Air France flights from Illinois to United Kingdom

Our best Air France deals on Illinois to United Kingdom flight tickets
Air France
Dec 1
MDW1:22 pmChicago Midway
12h 23m
1 stop
LHR7:45 amLondon Heathrow
Dec 4
LHR8:55 amLondon Heathrow
13h 19m
1 stop
MDW4:14 pmChicago Midway
$894
Air France
Sep 22
MDW1:00 pmChicago Midway
11h 25m
1 stop
LHR6:25 amLondon Heathrow
Oct 2
LHR9:20 amLondon Heathrow
12h 56m
1 stop
MDW4:16 pmChicago Midway
$903

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to United Kingdom 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 25, 2026.
Use the filters below to find and compare flights from Illinois to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Mon 8/24

10:25 pm-8:55 pm

2 stops16h 30m

London Luton

Tue 11/24

9:30 pm-3:30 pm

2 stops24h 00m

$693

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 9/7

10:25 pm-2:40 pm

1 stop10h 15m

London Gatwick

Wed 9/9

2:00 pm-11:55 pm

1 stop15h 55m

$694

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 9/21

7:15 pm-5:40 pm

1 stop16h 25m

London Heathrow

Sat 10/3

6:40 am-4:10 pm

1 stop15h 30m

$695

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Mon 8/17

7:25 pm-12:20 am

2 stops22h 55m

London Stansted

Mon 8/24

6:30 am-1:22 pm

3 stops36h 52m

$695

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 10/3

7:25 pm-11:55 am

1 stop10h 30m

London Heathrow

Sun 10/11

1:05 pm-9:25 pm

1 stop14h 20m

$697
Quickest round-trip

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 9/30

10:25 pm-2:40 pm

1 stop10h 15m

London Gatwick

Wed 10/7

3:40 pm-9:25 pm

1 stop11h 45m

$697

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Wed 10/28

7:50 pm-12:50 pm

1 stop12h 00m

London City

Tue 11/3

9:15 am-4:20 pm

1 stop13h 05m

$833

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Wed 10/21

2:20 pm-8:40 am

1 stop12h 20m

London City

Wed 10/28

9:15 am-5:20 pm

1 stop13h 05m

$834

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Mon 9/28

1:19 pm-7:10 am

1 stop11h 51m

London Heathrow

Sun 10/4

9:20 am-4:15 pm

1 stop12h 55m

$841

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Mon 9/28

1:19 pm-7:10 am

1 stop11h 51m

London Heathrow

Sun 10/4

9:20 am-4:15 pm

1 stop12h 55m

$843

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to the United Kingdom from

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

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 United Kingdom?

In general, January is the cheapest month to fly from Illinois to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $649. If you aren’t able to travel to United Kingdom during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $680.

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from Illinois to United Kingdom is on a Tuesday when prices can be found for as low as $825. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $1,047.

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

According to our data, the cheapest time of day to fly to United Kingdom is in the afternoon. momondo users have found flights departing from Illinois to United Kingdom in the afternoon for as low as $932. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to United Kingdom are more costly in the evening, with an average ticket price of $941. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Illinois to United Kingdom flight route?

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

How far in advance should I book a flight from Illinois to the United Kingdom?

You are more likely to see cheaper flights to United Kingdom from Illinois when booking week ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $835 when searching week out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from Illinois for as low as $793 on momondo.

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

There are 4 cabin classes available to choose from on Illinois to United Kingdom 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 Illinois to United Kingdom flights?

You could potentially save up to 41% on your flight if you consider stops on a Illinois to United Kingdom flight.

Cheap Illinois to United Kingdom flight deals and tips

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

Best Price Found

$381

Fastest flight time

7h 45m

Direct flights

Every day

Airports in United Kingdom

1,285 airports
The best one-way flight to United Kingdom from Illinois in the past 72 hours is $381. The best round-trip flight deal from Illinois to United Kingdom found on momondo in the last 72 hours is $1,018.
The fastest flight from Illinois to United Kingdom takes 7h 45m
Direct flights go from Illinois to United Kingdom every day.
There are 1,285 airports in United Kingdom. From Illinois there are direct flights to London Heathrow (LHR), Edinburgh Turnhouse (EDI).
Search flight deals

Frequently asked questions about flying from Illinois to the United Kingdom

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

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

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

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

    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 Illinois to United Kingdom.

  • What documentation or ID do you need to fly to United Kingdom?

    The required travel and health documents for your United Kingdom trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at United Kingdom. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

Best airlines flying from Illinois to United Kingdom

Compare and see reviews for airlines that fly from Illinois to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $51Free CancellationRating
7.1
3,024 reviews
Search JetBlue flights
Virgin AtlanticPriceFrom $144Free CancellationRating
7.5
695 reviews
Search Virgin Atlantic flights
Air CanadaPriceFrom $362Free CancellationRating
7.1
11,382 reviews
Search Air Canada flights
TAP AIR PORTUGALPriceFrom $428Free CancellationRating
7.2
2,345 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $430Free CancellationRating
7.0
716 reviews
Search Icelandair flights
SWISSPriceFrom $458Free CancellationRating
7.5
2,019 reviews
Search SWISS flights
DeltaPriceFrom $468Free CancellationRating
7.8
8,488 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom $476Free CancellationRating
7.4
1,900 reviews
Search Scandinavian Airlines flights
British AirwaysPriceFrom $513Free CancellationRating
6.7
8,132 reviews
Search British Airways flights
FinnairPriceFrom $516Free CancellationRating
7.6
1,423 reviews
Search Finnair flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to United Kingdom for you.

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

Yes. All flights to United Kingdom from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to United Kingdom from Illinois.

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

Price alerts on flights to United Kingdom from Illinois are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Find better results for your trip to the United Kingdom

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to Londonfrom $383
Flights to Manchesterfrom $471
Flights to Edinburghfrom $543
Flights to Glasgowfrom $502
Flights to Birminghamfrom $540
Flights to Newcastle upon Tynefrom $669
Flights to Belfastfrom $636
Flights to Bristolfrom $720
Flights to Invernessfrom $620
Flights to Liverpoolfrom $650
Flights to Aberdeenfrom $661
Flights to Leedsfrom $653