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$285+ Cheap flights from Illinois to London, ON (YXU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/30. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YXU
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Illinois to London

Cheapest flights from Illinois to London
Explore the most affordable flight options available from Illinois to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Air Canada deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2910:00 amORD - YXU
1 stop6h 05mAir Canada
Sat 1/39:25 amYXU - ORD
1 stop6h 45mAir Canada
Deal found 12/16$963
This United Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/291:24 pmORD - YXU
2 stops6h 57mUnited Airlines
Sat 1/35:10 amYXU - ORD
2 stops10h 05mUnited Airlines
Deal found 12/16$988

Find flight deals from Illinois to London

Keep the following information in mind while searching for Illinois to London flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$314
(Kiwi.com)

One-way from

$285
(Air Canada)
Provider with most accurate pricing for Chicago (CHI)-London flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-London flights.
Search Deals
From Illinois to London
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One-way flight from Illinois to London
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to London 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, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Illinois to London that are best for you.

Fly from

Illinois

Fly to

London

Route

Depart

Return

Price

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 1/12

2:20 pm-6:34 am

1 stop15h 14m

London

Thu 1/15

8:10 pm-1:35 pm

1 stop18h 25m

$314

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 1/12

2:20 pm-6:34 am

1 stop15h 14m

London

Thu 1/15

8:10 pm-6:43 pm

2 stops23h 33m

$434

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 1/29

9:00 am-6:34 am

2 stops20h 34m

London

Thu 2/5

8:10 pm-1:35 pm

1 stop18h 25m

$449

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 1/30

3:55 pm-9:20 pm

1 stop4h 25m

London

Fri 2/6

5:10 am-10:06 am

1 stop5h 56m

$621

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 1/22

3:55 pm-9:21 pm

1 stop4h 26m

London

Mon 1/26

9:50 am-1:01 pm

1 stop4h 11m

$622

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 1/30

3:55 pm-9:20 pm

1 stop4h 25m

London

Fri 2/6

5:10 am-11:06 am

2 stops6h 56m

$631

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 1/30

3:55 pm-9:20 pm

1 stop4h 25m

$285

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 1/30

12:00 pm-9:20 pm

2 stops8h 20m

$338

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 1/30

3:22 pm-7:13 pm

3 stops50h 51m

$381

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Best time to book a flight from Illinois to London

Have a flexible travel schedule? Discover the best time to fly to London from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to London

What is the cheapest month to book a flight from Illinois to London, Ontario?

Currently, October is the cheapest month in which you can book a flight from Illinois to London, Ontario (average of $85). Flying from Illinois to London, Ontario in December is currently the most expensive (average of $211). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Illinois to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to London from Illinois?

    London (YXU), located 5.3 mi from the city center, is the airport you fly into when you book flights from Illinois to London.

  • How long is the flight from Illinois to London, Ontario?

    Departing from Illinois to London, Ontario will take you 15h 14m. Airlines will cover a distance of 351 mi.

  • Can I find deals for flights from Illinois to London that include hotel bookings?

    Yes. In addition to deals on Illinois to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to London.

  • Can I find deals for business class flights from Illinois to London?

    Yes. Cheapflights offers flight deals from Illinois to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to London, Ontario?

    Currently, October is the cheapest month in which you can book a flight from Illinois to London, Ontario (average of $85). Flying from Illinois to London, Ontario in December is currently the most expensive (average of $211). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Grand Bend

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