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$335+ Cheap flights from London, ON (YXU) to Illinois

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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Find flight deals from London to Illinois

Cheapest flights from London to Illinois
Explore the most affordable flight options available from London to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2025.

This United Airlines deal was found by Cheapflights users on 11/5. 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.
Sat 12/209:25 amYXU - ORD
1 stop6h 45mUnited Airlines
Sat 12/272:00 pmORD - YXU
1 stop6h 21mUnited Airlines
Deal found 11/5$733

Cheap flight deals from London to Illinois

Keep the following information in mind while searching for London to Illinois flight deals. Data was last updated November 6, 2025.

Round-trip from

$483
(Air Canada)

One-way from

$335
(Air Canada)
From London to Illinois
Search Deals
One-way flight from London to Illinois
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Cheapflights Fare Finder

 
Customize your flight search to find flights from London to Illinois 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 November 6, 2025.
Use the filters below to find and compare flights from London to Illinois that are best for you.

Fly from

London

Fly to

Illinois

Route

Depart

Return

Price

LondonChicago

YXU - ORD

YXUORD

London

Tue 4/28

5:10 am-9:10 am

1 stop5h 00m

Chicago O'Hare Intl

Wed 4/29

9:50 am-5:03 pm

1 stop6h 13m

$483

LondonChicago

YXU - ORD

YXUORD

London

Sat 12/20

9:25 am-3:10 pm

1 stop6h 45m

Chicago O'Hare Intl

Sat 12/27

2:00 pm-9:21 pm

1 stop6h 21m

$733

LondonChicago

YXU - MDW

YXUMDW

London

Tue 4/14

8:00 am-9:51 am

2 stops26h 51m

Chicago Midway

Thu 4/16

10:35 am-6:35 am

2 stops19h 00m

$1,385

LondonChicago

YXU - ORD

YXUORD

London

Thu 11/20

9:25 am-1:01 pm

1 stop4h 36m

$335

LondonChicago

YXU - ORD

YXUORD

London

Sun 12/21

9:25 am-3:10 pm

1 stop6h 45m

$399

LondonChicago

YXU - ORD

YXUORD

London

Sun 12/21

5:10 am-11:44 pm

2 stops19h 34m

$443

LondonChicago

YXU - MDW

YXUMDW

London

Thu 11/20

8:10 pm-10:43 pm

3 stops27h 33m

$522

LondonChicago

YXU - ORD

YXUORD

London

Wed 11/12

9:25 am-3:10 pm

1 stop6h 45m

$535

LondonChicago

YXU - ORD

YXUORD

London

Thu 11/20

8:10 pm-12:08 am

3 stops28h 58m

$575

LondonChicago

YXU - MDW

YXUMDW

London

Sun 12/21

8:10 pm-10:19 am

3 stops39h 09m

$607

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

Showing 1-10 of 13 results
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Best time to book a flight from London to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from London 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 London to Illinois

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

Currently, April is the cheapest month in which you can book a flight from London, Ontario to Illinois (average of $84). Flying from London, Ontario to Illinois in February is currently the most expensive (average of $190). 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 London to Illinois. 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 from for flights from London to Illinois?

    London (YXU) is the airport you will fly out of if you book a flight from London to Illinois. It is only a 5.3 mi journey to London (YXU) from London’s city center.

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

    For as low as $483, Air Canada can have you in Illinois from London, Ontario in 5h. The distance between London, Ontario and Illinois is about 351 mi. This flight may include one or multiple stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London to Illinois 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 London, Ontario to Illinois?

    Currently, April is the cheapest month in which you can book a flight from London, Ontario to Illinois (average of $84). Flying from London, Ontario to Illinois in February is currently the most expensive (average of $190). 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

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