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Cheap flights from Illinois to London from £158

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 London departing on 26/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Illinois to London

Cheap return flights

These are some of the best return flight deals from Illinois to London that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Illinois to London.

Cheap last-minute flights

Planning a quick getaway from Illinois to London? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to London, so you can enjoy a seamless trip without stopovers.

Cheap bus & train deals from Illinois to London

Find recent round-trip train or bus tickets from Illinois to London.

All round-trip flight deals to London

The cheapest plane tickets to London found on KAYAK recently.
20:25 - 20:40ORD-LGW
18h 15m2 stops
16:35 - 15:30LGW-ORD
28h 55m1 stop
£324TAP AIR PORTUGAL
Find Deal
Sun, 8 Dec - Tue, 10 Dec
20:25 - 20:40ORD-LGW
18h 15m2 stops
16:35 - 15:30LGW-ORD
28h 55m1 stop
£327TAP AIR PORTUGAL
Find Deal
Sun, 19 Jan - Tue, 21 Jan
19:10 - 16:00ORD-LHR
14h 50m1 stop
06:40 - 15:50LHR-ORD
39h 10m2 stops
£381Scandinavian Airlines
Find Deal
Fri, 24 Jan - Sun, 26 Jan
20:20 - 19:25ORD-LGW
17h 05m2 stops
20:15 - 15:30LGW-ORD
25h 15m2 stops
Fri, 17 Jan - Sat, 25 Jan
19:10 - 16:00ORD-LHR
14h 50m1 stop
06:40 - 16:50LHR-ORD
15h 10m1 stop
£390Scandinavian Airlines
Find Deal
Fri, 7 Mar - Mon, 10 Mar
19:15 - 18:45ORD-LGW
17h 30m2 stops
13:10 - 15:30LGW-ORD
32h 20m2 stops
Wed, 15 Jan - Sat, 25 Jan
07:00 - 05:55ORD-LHR
16h 55m1 stop
07:25 - 15:44LHR-ORD
14h 19m1 stop
£403Icelandair
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Sat, 18 Jan - Sun, 2 Feb
07:00 - 05:55ORD-LHR
16h 55m1 stop
07:25 - 15:44LHR-ORD
14h 19m1 stop
£411JetBlue
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Sat, 18 Jan - Fri, 31 Jan
09:55 - 05:55ORD-LHR
14h 00m1 stop
08:25 - 17:53LHR-ORD
15h 28m1 stop
£413JetBlue
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Sat, 18 Jan - Sat, 25 Jan
18:30 - 10:55ORD-LGW
10h 25m1 stop
11:55 - 17:20LGW-ORD
11h 25m1 stop
£441Icelandair
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Mon, 27 Jan - Fri, 7 Mar
18:06 - 10:00ORD-LGW
33h 54m1 stop
Sun, 26 Jan
18:30 - 19:30ORD-LHR
19h 00m1 stop
£159Icelandair
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Tue, 21 Jan
16:45 - 12:50ORD-LHR
14h 05m1 stop
£220WestJet
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Thu, 20 Feb
20:25 - 17:30ORD-LHR
15h 05m1 stop
£232TAP AIR PORTUGAL
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Sun, 8 Dec
20:25 - 21:35ORD-LHR
19h 10m1 stop
£235TAP AIR PORTUGAL
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Sun, 1 Dec
11:01 - 09:30ORD-LHR
16h 29m1 stop
£272JetBlue
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Thu, 24 Apr
19:10 - 21:40ORD-LHR
20h 30m1 stop
£285Scandinavian Airlines
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Sun, 15 Dec
19:10 - 18:50ORD-LHR
17h 40m2 stops
£288Scandinavian Airlines
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Mon, 6 Jan
12:15 - 05:55ORD-LHR
11h 40m1 stop
£311JetBlue
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Wed, 27 Nov
16:45 - 12:50ORD-LHR
14h 05m1 stop
£312WestJet
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Mon, 14 Apr
07:20 - 07:10ORD-LHR
17h 50m1 stop
08:55 - 16:15LHR-ORD
13h 20m1 stop
Mon, 25 Nov - Wed, 4 Dec
19:05 - 16:20ORD-LHR
15h 15m1 stop
06:00 - 16:15LHR-ORD
16h 15m1 stop
£474SWISS
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Tue, 26 Nov - Wed, 4 Dec
11:35 - 07:10ORD-LHR
13h 35m1 stop
11:10 - 19:32LHR-ORD
14h 22m1 stop
£487Air Canada
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Mon, 25 Nov - Wed, 4 Dec
15:45 - 08:25ORD-LHR
10h 40m1 stop
09:30 - 20:05LHR-ORD
16h 35m1 stop
£489United Airlines
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Mon, 25 Nov - Wed, 4 Dec
17:50 - 07:55ORD-LHR
8h 05mdirect
08:30 - 15:15LHR-ORD
12h 45m1 stop
£490United Airlines
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Mon, 25 Nov - Wed, 4 Dec
18:05 - 09:00ORD-LGW
32h 55m1 stop
12:30 - 14:59LGW-ORD
32h 29m1 stop
£496British Airways
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Sat, 23 Nov - Thu, 5 Dec
11:35 - 07:10ORD-LHR
13h 35m1 stop
06:50 - 14:45LHR-ORD
13h 55m2 stops
£496Air Canada
Find Deal
Tue, 26 Nov - Thu, 5 Dec
18:30 - 08:15ORD-LHR
7h 45mdirect
15:45 - 18:45LHR-ORD
9h 00mdirect
£500Iberia
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Tue, 26 Nov - Thu, 5 Dec
16:45 - 10:15ORD-LGW
11h 30m1 stop
19:35 - 14:30LGW-ORD
24h 55m1 stop
£505Iberia
Find Deal
Tue, 26 Nov - Thu, 5 Dec
18:05 - 09:00ORD-LGW
32h 55m1 stop
13:40 - 14:30LGW-ORD
30h 50m2 stops
£530British Airways
Find Deal
Sat, 23 Nov - Thu, 5 Dec
17:00 - 06:50ORD-LHR
7h 50mdirect
15:45 - 18:45LHR-ORD
9h 00mdirect
£489Iberia
Find Deal
Wed, 15 Jan - Tue, 21 Jan
23:05 - 11:40ORD-LHR
7h 35mdirect
15:45 - 19:45LHR-ORD
9h 00mdirect
£492Iberia
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Wed, 19 Mar - Wed, 26 Mar
22:00 - 11:40ORD-LHR
7h 40mdirect
11:55 - 14:45LHR-ORD
8h 50mdirect
£493British Airways
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Sun, 12 Jan - Wed, 5 Feb
21:25 - 11:15ORD-LHR
7h 50mdirect
14:25 - 17:00LHR-ORD
8h 35mdirect
£494Iberia
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Tue, 22 Apr - Wed, 30 Apr
21:10 - 11:15ORD-LHR
8h 05mdirect
10:25 - 13:50LHR-ORD
9h 25mdirect
£495Lufthansa
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Sun, 8 Dec - Tue, 24 Dec
21:45 - 11:30ORD-LHR
7h 45mdirect
11:00 - 13:55LHR-ORD
8h 55mdirect
£497Finnair
Find Deal
Sun, 12 Jan - Tue, 28 Jan
21:45 - 11:30ORD-LHR
7h 45mdirect
11:00 - 14:55LHR-ORD
8h 55mdirect
£500British Airways
Find Deal
Wed, 5 Mar - Tue, 18 Mar
21:45 - 11:30ORD-LHR
7h 45mdirect
14:10 - 17:00LHR-ORD
8h 50mdirect
£502Finnair
Find Deal
Sun, 8 Dec - Tue, 24 Dec
18:50 - 07:55ORD-LHR
8h 05mdirect
10:25 - 14:50LHR-ORD
9h 25mdirect
£513United Airlines
Find Deal
Tue, 11 Mar - Wed, 19 Mar
22:10 - 11:15ORD-LHR
8h 05mdirect
11:05 - 14:10LHR-ORD
9h 05mdirect
£515United Airlines
Find Deal
Tue, 25 Mar - Thu, 3 Apr

Icelandair flights from Illinois to London

Our best Icelandair deals on Illinois to London flight tickets
Icelandair
18 Jan
ORD07:00Chicago O'Hare Intl
16h 55m
1 stop
LHR05:55London Heathrow
2 Feb
LHR07:25London Heathrow
14h 19m
1 stop
ORD15:44Chicago O'Hare Intl
Icelandair
27 Jan
ORD18:30Chicago O'Hare Intl
10h 25m
1 stop
LGW10:55London Gatwick
7 Mar
LGW11:55London Gatwick
11h 25m
1 stop
ORD17:20Chicago O'Hare Intl
Icelandair
8 Dec
ORD18:30Chicago O'Hare Intl
10h 25m
1 stop
LGW10:55London Gatwick
12 Dec
LGW11:55London Gatwick
11h 25m
1 stop
ORD17:20Chicago O'Hare Intl

United Airlines flights from Illinois to London

Our best United Airlines deals on Illinois to London flight tickets
United Airlines
25 Nov
ORD15:45Chicago O'Hare Intl
10h 40m
1 stop
LHR08:25London Heathrow
4 Dec
LHR09:30London Heathrow
16h 35m
1 stop
ORD20:05Chicago O'Hare Intl
United Airlines
25 Nov
ORD17:50Chicago O'Hare Intl
8h 05m
LHR07:55London Heathrow
4 Dec
LHR08:30London Heathrow
12h 45m
1 stop
ORD15:15Chicago O'Hare Intl
United Airlines
2 Dec
ORD07:20Chicago O'Hare Intl
17h 50m
1 stop
LHR07:10London Heathrow
11 Dec
LHR08:55London Heathrow
13h 20m
1 stop
ORD16:15Chicago O'Hare Intl

See travel insights to London from

How to get the cheapest flight ticket from Illinois to London

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 London?

The cheapest month to fly to London 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. The month of January is another great option to travel to London, with average flight prices from Illinois averaging around £512.

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

Our data shows that Saturday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £543. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to London for around £659.

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

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £548. Flights at midday are often more expensive, with an average ticket price of £666.

What is the cheapest Illinois to London flight route?

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

How far in advance should I book a flight to London?

In general, most travellers find the cheapest time to book a flight to London is about 59 days prior to their departure date, when tickets on average are £594. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Illinois for as low as £420 on momondo.

What cabin class options are available on Illinois to London flights?

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

You could potentially save up to 48% on your flight if you consider stops on a Illinois to London flight.

Cheap Illinois to London flight deals and tips

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

Best price found

£158

Fastest flight time

7h 35m

Direct flights

Every day

Airports in London

4 airports
The best one-way flight to London from Illinois in the past 72 hours is £158. The best return flight deal from Illinois to London found on momondo in the last 72 hours is £324.
The fastest flight from Illinois to London takes 7h 35m
Direct flights go from Illinois to London every day.
There are 4 airports near London: London City (LCY), London Heathrow (LHR), London Stansted (STN), London Gatwick (LGW)

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

    Prices for flights from Illinois to London refresh daily.

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

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

    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 London.

  • What documentation or ID do you need to fly to London?

    The travel and health documents required for your trip to London can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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


Best airlines flying from Illinois to London

Compare and see reviews for airlines that fly from Illinois to London with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom £322Free CancellationRating
6.8
7,146 reviews
Search Lufthansa flights
Scandinavian AirlinesPriceFrom £344Free CancellationRating
7.3
1,293 reviews
Search Scandinavian Airlines flights
FinnairPriceFrom £378Free CancellationRating
7.7
1,299 reviews
Search Finnair flights
American AirlinesPriceFrom £406Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Aer LingusPriceFrom £471Free CancellationRating
7.1
1,089 reviews
Search Aer Lingus flights
British AirwaysPriceFrom £494Free CancellationRating
6.6
6,831 reviews
Search British Airways flights
IberiaPriceFrom £497Free CancellationRating
7.0
2,665 reviews
Search Iberia flights
United AirlinesPriceFrom £535Free CancellationRating
7.4
9,171 reviews
Search United Airlines flights

Why use momondo?

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

It is quick and easy to find Illinois to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

All flight searches from Illinois to London on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Illinois to London?

Once you have performed a search for Illinois to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to London from Illinois. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.


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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London