How does KAYAK find such low prices on flights from Illinois to London?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to London. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to London?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Illinois is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Illinois to London?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Illinois with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to London?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$251 CHEAP FLIGHTS from Illinois to London

YXU

KAYAK searches hundreds of travel sites at once for deals on flights to London

...and more

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41,299,237 searches in the past 7 days on KAYAK

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$419

WestJet

Mon 5/25Thu 5/28

ORD - YXU • 1 stop

Cheapest one-way

$251

Multiple Airlines

Tue 2/10

ORD - YXU • 2 stops

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to London!

Flight Deals

Cheap Flights from Illinois to London

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Illinois to London

Mon, May 25 - Thu, May 28

5:30 pm - 5:12 am

ORD

YXU

10h 42m

1 stop

8:00 pm - 4:43 pm

YXU

ORD

21h 43m

1 stop

$419WestJet

Mon, Mar 2 - Mon, Mar 9

2:00 pm - 6:35 am

ORD

YXU

15h 35m

2 stops

8:10 pm - 3:10 pm

YXU

ORD

20h 00m

2 stops

$456Multiple Airlines

Mon, May 25 - Thu, May 28

5:30 pm - 5:12 am

ORD

YXU

10h 42m

1 stop

8:00 pm - 4:43 pm

YXU

ORD

21h 43m

1 stop

$492WestJet

Mon, Feb 16 - Thu, Feb 26

2:20 pm - 6:35 am

ORD

YXU

15h 15m

1 stop

8:10 pm - 1:35 pm

YXU

ORD

18h 25m

1 stop

$512WestJet

Mon, Mar 2 - Mon, Mar 9

8:16 pm - 9:21 pm

ORD

YXU

24h 05m

3 stops

8:10 pm - 3:10 pm

YXU

ORD

20h 00m

2 stops

$526Multiple Airlines

Mon, Mar 2 - Mon, Mar 9

2:00 pm - 6:35 am

ORD

YXU

15h 35m

2 stops

9:25 am - 1:01 pm

YXU

ORD

4h 36m

1 stop

$530Multiple Airlines

Mon, Mar 2 - Mon, Mar 9

2:20 pm - 6:35 am

ORD

YXU

15h 15m

1 stop

8:10 pm - 10:52 am

YXU

ORD

15h 42m

2 stops

$542Multiple Airlines

Mon, Feb 16 - Tue, Feb 24

2:20 pm - 6:35 am

ORD

YXU

15h 15m

1 stop

8:10 pm - 10:51 am

YXU

ORD

15h 41m

2 stops

$557Multiple Airlines

Wed, Feb 18 - Thu, Feb 26

6:02 pm - 6:35 am

ORD

YXU

35h 33m

2 stops

8:10 pm - 1:35 pm

YXU

ORD

18h 25m

1 stop

$561Multiple Airlines

Mon, Mar 2 - Mon, Mar 9

2:00 pm - 9:21 pm

ORD

YXU

6h 21m

1 stop

9:25 am - 1:01 pm

YXU

ORD

4h 36m

1 stop

$562Air Canada

Useful Info

Cheapest flight	$251

Flight from Chicago to London

How does KAYAK find such low prices on flights from Illinois to London?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to London.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to London?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to London?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to London?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Grand Bend

Everything you need to know for your flight to London

Airports

Cabin class

Complete your trip

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in London

London (YXU)

YXU

$229 Find Cheap Flights from Illinois to London

KAYAK searches hundreds of travel sites at once for deals on flights to London

Everything you should know

Cheap Flights from Illinois to London

Recent round-trip flight deals from Illinois to London

Recent one-way flight deals from Illinois to London

Recent last minute flight deals from Illinois to London

Good to know

FAQs for booking flights from Illinois to London

How does KAYAK find such low prices on flights from Illinois to London?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to London.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to London?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Illinois to London?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to London?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near London?

Everything you need to know for your flight to London

Information on the airport you'll fly into in London

Cabin class types available on flights to Illinois

Complete your trip to London with a hotel stay or car rental

Flights to other popular destinations

Flights from domestic origins to London

Choose which airport to fly into in London

Find deals for your return flight