Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Illinois to the United Kingdom from £128

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 23/1. 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

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Illinois to the United Kingdom

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
18:30 - 18:25ORD-EDI
17h 55m2 stops
Multiple Airlines Logo
08:40 - 17:20EDI-ORD
14h 40m2 stops
£380Multiple Airlines
Find Deal
Tue, 2 Dec - Tue, 9 Dec
Multiple Airlines Logo
18:30 - 18:25ORD-EDI
17h 55m2 stops
Multiple Airlines Logo
08:20 - 17:20EDI-ORD
15h 00m2 stops
£385Multiple Airlines
Find Deal
Tue, 2 Dec - Wed, 10 Dec
Aer Lingus Logo
19:40 - 19:50ORD-EDI
18h 10m1 stop
Aer Lingus Logo
09:35 - 17:55EDI-ORD
14h 20m1 stop
£409Aer Lingus
Find Deal
Wed, 3 Dec - Wed, 10 Dec
Scandinavian Airlines Logo
19:20 - 17:40ORD-LHR
16h 20m1 stop
Scandinavian Airlines Logo
10:20 - 16:45LHR-ORD
12h 25m1 stop
£415Scandinavian Airlines
Find Deal
Mon, 2 Mar - Thu, 5 Mar
Icelandair Logo
18:30 - 19:30ORD-LHR
19h 00m1 stop
Icelandair Logo
12:15 - 17:20LHR-ORD
11h 05m1 stop
£415Icelandair
Find Deal
Sun, 30 Nov - Sat, 6 Dec
Scandinavian Airlines Logo
19:20 - 16:25ORD-LHR
15h 05m2 stops
Scandinavian Airlines Logo
06:40 - 16:45LHR-ORD
16h 05m2 stops
£416Scandinavian Airlines
Find Deal
Mon, 12 Jan - Sat, 17 Jan
Icelandair Logo
18:30 - 10:55ORD-LGW
10h 25m1 stop
Icelandair Logo
11:55 - 17:20LGW-ORD
11h 25m1 stop
£416Icelandair
Find Deal
Wed, 31 Dec - Sun, 11 Jan
TAP AIR PORTUGAL Logo
20:25 - 15:45ORD-LGW
13h 20m1 stop
TAP AIR PORTUGAL Logo
16:35 - 14:45LGW-ORD
28h 10m1 stop
£417TAP AIR PORTUGAL
Find Deal
Sun, 30 Nov - Sat, 6 Dec
TAP AIR PORTUGAL Logo
20:25 - 15:45ORD-LGW
13h 20m1 stop
TAP AIR PORTUGAL Logo
10:35 - 16:00LGW-ORD
35h 25m1 stop
£422TAP AIR PORTUGAL
Find Deal
Sun, 1 Mar - Tue, 31 Mar
Aer Lingus Logo
19:40 - 13:25ORD-LHR
11h 45m1 stop
Aer Lingus Logo
07:50 - 14:00LHR-ORD
12h 10m1 stop
£422Aer Lingus
Find Deal
Mon, 24 Nov - Thu, 27 Nov

Scandinavian Airlines flights from Illinois to United Kingdom

Our best Scandinavian Airlines deals on Illinois to United Kingdom flight tickets
Scandinavian Airlines
2 Mar
ORD19:20Chicago O'Hare Intl
16h 20m
1 stop
LHR17:40London Heathrow
5 Mar
LHR10:20London Heathrow
12h 25m
1 stop
ORD16:45Chicago O'Hare Intl
£415
Find similar
Scandinavian Airlines
12 Jan
ORD19:20Chicago O'Hare Intl
15h 05m
2 stops
LHR16:25London Heathrow
17 Jan
LHR06:40London Heathrow
16h 05m
2 stops
ORD16:45Chicago O'Hare Intl
£416
Find similar
Scandinavian Airlines
17 Jan
ORD19:20Chicago O'Hare Intl
15h 05m
2 stops
LHR16:25London Heathrow
24 Jan
LHR15:35London Heathrow
31h 20m
2 stops
ORD16:55Chicago O'Hare Intl
£417
Find similar

Icelandair flights from Illinois to United Kingdom

Our best Icelandair deals on Illinois to United Kingdom flight tickets
Icelandair
30 Nov
ORD18:30Chicago O'Hare Intl
19h 00m
1 stop
LHR19:30London Heathrow
6 Dec
LHR12:15London Heathrow
11h 05m
1 stop
ORD17:20Chicago O'Hare Intl
£415
Find similar
Icelandair
11 Nov
ORD18:30Chicago O'Hare Intl
19h 00m
1 stop
LHR19:30London Heathrow
20 Nov
LHR20:35London Heathrow
26h 45m
1 stop
ORD17:20Chicago O'Hare Intl
£416
Find similar
Icelandair
12 Nov
ORD18:30Chicago O'Hare Intl
19h 00m
1 stop
LHR19:30London Heathrow
19 Nov
LHR20:35London Heathrow
26h 45m
1 stop
ORD17:20Chicago O'Hare Intl
£417
Find similar

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 7 November 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

ChicagoEdinburgh

ORD - EDI

ORDEDI

Chicago O'Hare Intl

Tue 2/12

18:30-18:25

2 stops17h 55m

Edinburgh Turnhouse

Tue 9/12

08:40-17:20

2 stops14h 40m

£380

ChicagoEdinburgh

ORD - EDI

ORDEDI

Chicago O'Hare Intl

Tue 2/12

18:30-18:25

2 stops17h 55m

Edinburgh Turnhouse

Wed 10/12

08:20-17:20

2 stops15h 00m

£385

ChicagoEdinburgh

ORD - EDI

ORDEDI

Chicago O'Hare Intl

Wed 3/12

19:40-19:50

1 stop18h 10m

Edinburgh Turnhouse

Wed 10/12

09:35-17:55

1 stop14h 20m

£409

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 2/3

19:20-17:40

1 stop16h 20m

London Heathrow

Thu 5/3

10:20-16:45

1 stop12h 25m

£415

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 30/11

18:30-19:30

1 stop19h 00m

London Heathrow

Sat 6/12

12:15-17:20

1 stop11h 05m

£415

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 12/1

19:20-16:25

2 stops15h 05m

London Heathrow

Sat 17/1

06:40-16:45

2 stops16h 05m

£416

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 31/12

18:30-10:55

1 stop10h 25m

London Gatwick

Sun 11/1

11:55-17:20

1 stop11h 25m

£416

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 30/11

20:25-15:45

1 stop13h 20m

London Gatwick

Sat 6/12

16:35-14:45

1 stop28h 10m

£417

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 1/3

20:25-15:45

1 stop13h 20m

London Gatwick

Tue 31/3

10:35-16:00

1 stop35h 25m

£422

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 24/11

19:40-13:25

1 stop11h 45m

London Heathrow

Thu 27/11

07:50-14:00

1 stop12h 10m

£422

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

The cheapest month to fly to United Kingdom from Illinois is in February. Flight prices, which tend to average around £498, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of February, then departing from Illinois during the month September is also very affordable. Most momondo users find prices during this month for around £501.

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 Sunday. Travellers who choose to depart for United Kingdom on a Sunday will often find tickets for as low as £522. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to United Kingdom for around £715.

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

The cheapest time of day to fly to United Kingdom is in the afternoon when flights can be purchased for as low as £575. Try not to purchase tickets at midday because they tend to be around £713. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 £607 when searching weeks before you fly. 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 £532 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 37% 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

£304

Fastest flight time

7h 40m

Direct flights

Every day

Airports in United Kingdom

2 airports
The best one-way flight to United Kingdom from Illinois in the past 72 hours is £304. The best return flight deal from Illinois to United Kingdom found on momondo in the last 72 hours is £500.
The fastest flight from Illinois to United Kingdom takes 7h 40m
Direct flights go from Illinois to United Kingdom every day.
There are 2 airports near United Kingdom: 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 refreshed on a daily basis.

  • 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
IcelandairPriceFrom £348Free CancellationRating
7.1
572 reviews
Search Icelandair flights
LufthansaPriceFrom £367Free CancellationRating
6.8
7,558 reviews
Search Lufthansa flights
British AirwaysPriceFrom £394Free CancellationRating
6.7
7,500 reviews
Search British Airways flights
American AirlinesPriceFrom £395Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights
FinnairPriceFrom £425Free CancellationRating
7.6
1,335 reviews
Search Finnair flights
Aer LingusPriceFrom £432Free CancellationRating
7.2
1,365 reviews
Search Aer Lingus flights
IberiaPriceFrom £458Free CancellationRating
7.0
3,007 reviews
Search Iberia flights
United AirlinesPriceFrom £474Free CancellationRating
7.4
9,009 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom £499Free CancellationRating
7.5
672 reviews
Search Virgin Atlantic flights

Why use momondo?

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

Finding the right flight to United Kingdom from Illinois 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 United Kingdom quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to United Kingdom from Illinois which offer a flexible booking policy as well as other useful filters and features.

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

momondo helps you find the best flight between Illinois and United Kingdom 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 Illinois to United Kingdom right now. Can momondo alert me if prices change?

If you are simply researching potential flights to United Kingdom, momondo offers a useful price alert feature which will track prices for flights to United Kingdom from Illinois and alert you when they change.

An easier way to manage your United Kingdom trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 7/12
Sun 14/12
By creating a price alert you accept our terms of use and privacy policy.

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 £31
Flights to Manchesterfrom £34
Flights to Birminghamfrom £34
Flights to Edinburghfrom £34
Flights to Belfastfrom £31
Flights to Glasgowfrom £31
Flights to Bristolfrom £31
Flights to Newcastle upon Tynefrom £31
Flights to Aberdeenfrom £49
Flights to Liverpoolfrom £31
Flights to Leedsfrom £52
Flights to Invernessfrom £37