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Cheap flights from Illinois to the United Kingdom from $188

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 1/26. 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
0 bags

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Find the cheapest flights from Illinois to the United Kingdom

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
6:30 pm - 9:55 am
ORD
-
GLA
9h 25m1 stop
Icelandair Logo
12:35 pm - 5:20 pm
GLA
-
ORD
10h 45m1 stop
$476Icelandair
Sun, Jan 18 - Mon, Jan 26
Icelandair Logo
6:30 pm - 9:55 am
ORD
-
GLA
9h 25m1 stop
Icelandair Logo
12:35 pm - 5:20 pm
GLA
-
ORD
10h 45m1 stop
$492Icelandair
Tue, Jan 13 - Wed, Jan 28
Multiple Airlines Logo
6:30 pm - 10:50 pm
ORD
-
EDI
22h 20m2 stops
Multiple Airlines Logo
6:00 am - 5:20 pm
EDI
-
ORD
17h 20m2 stops
$492Multiple Airlines
Fri, Jan 23 - Fri, Jan 30
Multiple Airlines Logo
7:10 pm - 11:10 pm
ORD
-
GLA
22h 00m2 stops
Multiple Airlines Logo
7:25 am - 4:55 pm
GLA
-
ORD
15h 30m2 stops
$507Multiple Airlines
Sun, Jan 25 - Sun, Feb 1
Scandinavian Airlines Logo
7:10 pm - 4:25 pm
ORD
-
LHR
15h 15m2 stops
Scandinavian Airlines Logo
6:40 am - 4:45 pm
LHR
-
ORD
16h 05m1 stop
$545Scandinavian Airlines
Sun, Jan 18 - Sat, Jan 24
Scandinavian Airlines Logo
7:20 pm - 6:30 pm
ORD
-
LHR
17h 10m1 stop
Scandinavian Airlines Logo
6:40 am - 4:45 pm
LHR
-
ORD
16h 05m1 stop
$547Scandinavian Airlines
Mon, Jan 12 - Thu, Jan 15
TAP AIR PORTUGAL Logo
8:15 pm - 4:15 pm
ORD
-
MAN
14h 00m1 stop
TAP AIR PORTUGAL Logo
5:15 pm - 3:00 pm
MAN
-
ORD
27h 45m1 stop
$555TAP AIR PORTUGAL
Fri, Jan 9 - Tue, Jan 13
TAP AIR PORTUGAL Logo
8:25 pm - 4:15 pm
ORD
-
MAN
13h 50m1 stop
TAP AIR PORTUGAL Logo
5:15 pm - 3:00 pm
MAN
-
ORD
27h 45m1 stop
$563TAP AIR PORTUGAL
Sun, Jan 25 - Tue, Feb 10
SWISS Logo
6:50 pm - 12:55 pm
ORD
-
LCY
12h 05m1 stop
SWISS Logo
9:15 am - 4:20 pm
LCY
-
ORD
13h 05m1 stop
$621SWISS
Sun, Jan 11 - Tue, Jan 20
SWISS Logo
5:10 pm - 12:55 pm
ORD
-
LCY
14h 45m1 stop
SWISS Logo
9:15 am - 3:55 pm
LCY
-
ORD
12h 40m1 stop
$626SWISS
Tue, Mar 17 - Tue, Mar 31

TAP AIR PORTUGAL flights from Illinois to United Kingdom

Our best TAP AIR PORTUGAL deals on Illinois to United Kingdom flight tickets
TAP AIR PORTUGAL
Jan 9
ORD8:15 pmChicago O'Hare Intl
14h 00m
1 stop
MAN4:15 pmManchester
Jan 13
MAN5:15 pmManchester
27h 45m
1 stop
ORD3:00 pmChicago O'Hare Intl
$555
Find similar
TAP AIR PORTUGAL
Jan 14
ORD7:10 pmChicago O'Hare Intl
34h 15m
1 stop
LHR11:25 amLondon Heathrow
Jan 18
LHR6:00 amLondon Heathrow
14h 45m
1 stop
ORD2:45 pmChicago O'Hare Intl
$576
Find similar
TAP AIR PORTUGAL
Feb 1
ORD8:25 pmChicago O'Hare Intl
18h 10m
2 stops
LGW8:35 pmLondon Gatwick
Feb 10
LGW4:35 pmLondon Gatwick
28h 25m
1 stop
ORD3:00 pmChicago O'Hare Intl
$580
Find similar

United Airlines flights from Illinois to United Kingdom

Our best United Airlines deals on Illinois to United Kingdom flight tickets
United Airlines
Dec 30
ORD5:50 pmChicago O'Hare Intl
8h 05m
LHR7:55 amLondon Heathrow
Jan 29
LHR11:10 amLondon Heathrow
13h 15m
1 stop
ORD6:25 pmChicago O'Hare Intl
$616
Find similar
United Airlines
Dec 29
ORD2:30 pmChicago O'Hare Intl
10h 10m
1 stop
LHR6:40 amLondon Heathrow
Jan 12
LHR1:45 pmLondon Heathrow
32h 35m
1 stop
ORD4:20 pmChicago O'Hare Intl
$621
Find similar
United Airlines
Jan 11
ORD3:45 pmChicago O'Hare Intl
8h 10m
LHR5:55 amLondon Heathrow
Jan 21
LHR6:35 amLondon Heathrow
13h 35m
1 stop
ORD2:10 pmChicago O'Hare Intl
$622
Find similar

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 December 28, 2025.
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

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

Sun 1/18

6:30 pm-9:55 am

1 stop9h 25m

Glasgow Intl

Mon 1/26

12:35 pm-5:20 pm

1 stop10h 45m

$476

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

Tue 1/13

6:30 pm-9:55 am

1 stop9h 25m

Glasgow Intl

Wed 1/28

12:35 pm-5:20 pm

1 stop10h 45m

$492

ChicagoEdinburgh

ORD - EDI

ORDEDI

Chicago O'Hare Intl

Fri 1/23

6:30 pm-10:50 pm

2 stops22h 20m

Edinburgh Turnhouse

Fri 1/30

6:00 am-5:20 pm

2 stops17h 20m

$492

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

Sun 1/25

7:10 pm-11:10 pm

2 stops22h 00m

Glasgow Intl

Sun 2/1

7:25 am-4:55 pm

2 stops15h 30m

$507

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 1/18

7:10 pm-4:25 pm

2 stops15h 15m

London Heathrow

Sat 1/24

6:40 am-4:45 pm

1 stop16h 05m

$545

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 1/12

7:20 pm-6:30 pm

1 stop17h 10m

London Heathrow

Thu 1/15

6:40 am-4:45 pm

1 stop16h 05m

$547

ChicagoManchester

ORD - MAN

ORDMAN

Chicago O'Hare Intl

Fri 1/9

8:15 pm-4:15 pm

1 stop14h 00m

Manchester

Tue 1/13

5:15 pm-3:00 pm

1 stop27h 45m

$555

ChicagoManchester

ORD - MAN

ORDMAN

Chicago O'Hare Intl

Sun 1/25

8:25 pm-4:15 pm

1 stop13h 50m

Manchester

Tue 2/10

5:15 pm-3:00 pm

1 stop27h 45m

$563

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Sun 1/11

6:50 pm-12:55 pm

1 stop12h 05m

London City

Tue 1/20

9:15 am-4:20 pm

1 stop13h 05m

$621

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Tue 3/17

5:10 pm-12:55 pm

1 stop14h 45m

London City

Tue 3/31

9:15 am-3:55 pm

1 stop12h 40m

$626

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 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, September 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 $654. If you aren’t able to travel to United Kingdom during the month of September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $661.

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 $768. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $920.

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 evening. momondo users have found flights departing from Illinois to United Kingdom in the evening for as low as $805. 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 afternoon, with an average ticket price of $831. Departure times in the afternoon 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 to United Kingdom?

You are more likely to see cheaper flights to United Kingdom from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $795 when searching weeks 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 $702 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 61% 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

$417

Fastest flight time

7h 40m

Direct flights

Every day

Airports in United Kingdom

1,286 airports
The best one-way flight to United Kingdom from Illinois in the past 72 hours is $417. The best round-trip flight deal from Illinois to United Kingdom found on momondo in the last 72 hours is $668.
The fastest flight from Illinois to United Kingdom takes 7h 40m
Direct flights go from Illinois to United Kingdom every day.
There are 1,286 airports in United Kingdom. From Illinois there are direct flights to London Heathrow (LHR), Edinburgh Turnhouse (EDI).
Search flight deals

  • 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
7.2
2,901 reviews
Search JetBlue flights
SWISSPriceFrom $257Free CancellationRating
7.5
1,829 reviews
Search SWISS flights
Scandinavian AirlinesPriceFrom $331Free CancellationRating
7.4
1,630 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $345Free CancellationRating
7.9
8,017 reviews
Search Delta flights
TAP AIR PORTUGALPriceFrom $428Free CancellationRating
7.2
2,098 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $437Free CancellationRating
7.0
592 reviews
Search Icelandair flights
LufthansaPriceFrom $480Free CancellationRating
6.8
7,658 reviews
Search Lufthansa flights
Aer LingusPriceFrom $495Free CancellationRating
7.2
1,412 reviews
Search Aer Lingus flights
British AirwaysPriceFrom $502Free CancellationRating
6.7
7,616 reviews
Search British Airways flights
FinnairPriceFrom $517Free CancellationRating
7.6
1,339 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.

An easier way to manage your United Kingdom trip

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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 $344
Flights to Manchesterfrom $388
Flights to Edinburghfrom $389
Flights to Birminghamfrom $389
Flights to Glasgowfrom $411
Flights to Newcastle upon Tynefrom $462
Flights to Belfastfrom $455
Flights to Bristolfrom $450
Flights to Invernessfrom $401
Flights to Liverpoolfrom $444
Flights to Aberdeenfrom $496
Flights to Leedsfrom $459