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$226+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YXU
Mar 4 — Mar 111
Wed 3/4
Wed 3/11
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 February 2, 2026.

This oojo deal was found by Cheapflights users on 1/31. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/255:30 pm
ORD
-
YXU
1 stop10h 55m
WestJet
Thu 5/286:15 am
YXU
-
ORD
1 stop11h 25m
WestJet
Deal found 1/31$330
This oojo deal was found by Cheapflights users on 1/31. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/235:30 pm
ORD
-
YXU
1 stop10h 55m
WestJet
Tue 5/265:55 pm
YXU
-
ORD
1 stop23h 45m
WestJet
Deal found 1/31$430
This Air Canada deal was found by Cheapflights users on 2/1. 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 3/161:55 pm
ORD
-
YXU
1 stop6h 26m
Air Canada
Fri 3/209:40 am
YXU
-
ORD
1 stop6h 30m
Air Canada
Deal found 2/1$681
This Air Canada deal was found by Cheapflights users on 2/1. 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.
Wed 3/1810:00 am
ORD
-
YXU
1 stop6h 05m
Air Canada
Wed 3/259:40 am
YXU
-
ORD
1 stop6h 30m
Air Canada
Deal found 2/1$683
This Air Canada deal was found by Cheapflights users on 2/1. 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.
Thu 3/191:55 pm
ORD
-
YXU
1 stop6h 26m
Air Canada
Sat 3/215:10 am
YXU
-
ORD
2 stops7h 08m
Air Canada
Deal found 2/1$692
This Air Canada deal was found by Cheapflights users on 1/31. 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.
Sat 5/238:45 am
ORD
-
YXU
2 stops7h 48m
Air Canada
Tue 5/2612:20 pm
YXU
-
ORD
2 stops8h 48m
Air Canada
Deal found 1/31$698

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 February 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$330
(oojo)

One-way from

$226
(Kiwi.com)
Provider with most accurate pricing for Chicago (CHI)-London flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-London flights.
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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 February 2, 2026.
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

Sat 5/23

5:30 pm-5:25 am

1 stop10h 55m

London

Tue 5/26

5:55 pm-4:40 pm

1 stop23h 45m

$430

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 3/16

1:55 pm-9:21 pm

1 stop6h 26m

London

Fri 3/20

9:40 am-3:10 pm

1 stop6h 30m

$681

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Wed 3/18

10:00 am-5:05 pm

1 stop6h 05m

London

Wed 3/25

9:40 am-3:10 pm

1 stop6h 30m

$683

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 3/19

1:55 pm-9:21 pm

1 stop6h 26m

London

Sat 3/21

5:10 am-9:13 am

1 stop5h 03m

$683

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sat 5/23

8:45 am-5:33 pm

2 stops7h 48m

London

Tue 5/26

12:20 pm-8:08 pm

2 stops8h 48m

$698

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Tue 2/24

2:00 pm-9:21 pm

1 stop6h 21m

London

Wed 2/25

5:10 am-9:13 am

1 stop5h 03m

$738

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Tue 3/17

9:28 am-6:35 am

2 stops20h 07m

$226

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Tue 3/17

10:00 am-5:05 pm

1 stop6h 05m

$312

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sun 3/15

10:00 am-5:05 pm

1 stop6h 05m

$320

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 5/22

5:30 pm-5:25 am

1 stop10h 55m

$330

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/31

Showing 1-10 of 12 results
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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 July is currently the most expensive (average of $187). 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 6h 26m. Airlines will cover a distance of 351 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 July is currently the most expensive (average of $187). 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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Alternative routes for Illinois to London

See prices for flight routes from nearby airports that may be better suited for you.
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