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$206+ 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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
Mar 22 — Mar 291
Sun 3/22
Sun 3/29
1 adult, Economy
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Cheap 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 February 20, 2026.

This oojo deal was found by Cheapflights users on 2/17. 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.
Wed 4/295:55 pm
YXU
-
ORD
1 stop23h 45m
WestJet
Sun 5/35:30 pm
ORD
-
YXU
1 stop10h 50m
WestJet
Deal found 2/17$387
This Booking.com deal was found by Cheapflights users on 2/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/209:40 am
YXU
-
ORD
1 stop6h 30m
Air Canada
Thu 3/261:55 pm
ORD
-
YXU
1 stop6h 26m
Air Canada
Deal found 2/18$446
This Air Canada deal was found by Cheapflights users on 2/17. 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.
Fri 4/245:10 am
YXU
-
ORD
1 stop5h 00m
Air Canada
Fri 5/13:50 pm
ORD
-
YXU
1 stop4h 48m
Air Canada
Deal found 2/17$466
This Kiwi.com deal was found by Cheapflights users on 2/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/295:55 pm
YXU
-
ORD
2 stops21h 25m
Multiple Airlines
Sun 5/35:30 pm
ORD
-
YXU
1 stop10h 50m
Multiple Airlines
Deal found 2/17$470
This Air Canada deal was found by Cheapflights users on 2/17. 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.
Tue 3/179:40 am
YXU
-
ORD
1 stop6h 30m
Air Canada
Tue 3/241:55 pm
ORD
-
YXU
1 stop6h 26m
Air Canada
Deal found 2/17$490
This Kiwi.com deal was found by Cheapflights users on 2/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/247:30 am
YXU
-
ORD
2 stops31h 52m
Multiple Airlines
Fri 5/15:30 pm
ORD
-
YXU
1 stop10h 50m
Multiple Airlines
Deal found 2/17$508
This United Airlines deal was found by Cheapflights users on 2/18. 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 4/45:10 am
YXU
-
ORD
1 stop5h 40m
United Airlines
Sat 4/119:50 am
ORD
-
YXU
1 stop6h 13m
United Airlines
Deal found 2/18$520
This United Airlines deal was found by Cheapflights users on 2/17. 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.
Tue 3/175:10 am
YXU
-
ORD
1 stop5h 40m
United Airlines
Tue 3/249:15 am
ORD
-
YXU
2 stops11h 06m
United Airlines
Deal found 2/17$544
This Mytrip deal was found by Cheapflights users on 2/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/178:10 pm
YXU
-
MDW
3 stops23h 30m
WestJet
Tue 3/246:34 pm
MDW
-
YXU
3 stops35h 01m
WestJet
Deal found 2/17$971
This Mytrip deal was found by Cheapflights users on 2/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/67:30 am
YXU
-
MDW
3 stops35h 04m
Multiple Airlines
Tue 3/109:35 am
MDW
-
YXU
3 stops32h 28m
Multiple Airlines
Deal found 2/16$1,144
This Mytrip deal was found by Cheapflights users on 2/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:10 pm
YXU
-
MDW
3 stops17h 36m
WestJet
Wed 3/186:34 pm
MDW
-
YXU
3 stops35h 01m
WestJet
Deal found 2/16$1,338
This WestJet deal was found by Cheapflights users on 2/18. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/28:10 pm
YXU
-
MDW
2 stops14h 44m
WestJet
Wed 3/410:49 am
MDW
-
YXU
2 stops18h 46m
WestJet
Deal found 2/18$1,653

Find flight deals from London to Illinois

Keep the following information in mind while searching for London to Illinois flight deals. Data was last updated February 20, 2026.

Round-trip from

$387
(oojo)

One-way from

$206
(Trip.com)
From London to Illinois
Search Deals
One-way flight from London to Illinois
Search Deals

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 February 20, 2026.
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

Wed 4/29

5:55 pm-4:40 pm

1 stop23h 45m

Chicago O'Hare Intl

Sun 5/3

5:30 pm-5:20 am

1 stop10h 50m

$387

LondonChicago

YXU - ORD

YXUORD

London

Fri 3/20

9:40 am-3:10 pm

1 stop6h 30m

Chicago O'Hare Intl

Thu 3/26

1:55 pm-9:21 pm

1 stop6h 26m

$446

LondonChicago

YXU - ORD

YXUORD

London

Fri 4/24

5:10 am-9:10 am

1 stop5h 00m

Chicago O'Hare Intl

Fri 5/1

3:50 pm-9:38 pm

1 stop4h 48m

$466

LondonChicago

YXU - ORD

YXUORD

London

Tue 3/17

9:40 am-3:10 pm

1 stop6h 30m

Chicago O'Hare Intl

Tue 3/24

1:55 pm-9:21 pm

1 stop6h 26m

$490

LondonChicago

YXU - ORD

YXUORD

London

Fri 4/24

7:30 am-2:22 pm

2 stops31h 52m

Chicago O'Hare Intl

Fri 5/1

5:30 pm-5:20 am

1 stop10h 50m

$508

LondonChicago

YXU - ORD

YXUORD

London

Sat 4/4

5:10 am-9:50 am

1 stop5h 40m

Chicago O'Hare Intl

Sat 4/11

9:50 am-5:03 pm

1 stop6h 13m

$520

LondonChicago

YXU - ORD

YXUORD

London

Wed 4/29

5:10 am-2:40 pm

2 stops10h 30m

Chicago O'Hare Intl

Sun 5/3

6:00 am-5:33 pm

2 stops10h 33m

$526

LondonChicago

YXU - ORD

YXUORD

London

Tue 3/17

5:10 am-9:50 am

1 stop5h 40m

Chicago O'Hare Intl

Tue 3/24

9:15 am-9:21 pm

2 stops11h 06m

$544

LondonChicago

YXU - MDW

YXUMDW

London

Tue 3/17

8:10 pm-6:40 pm

3 stops23h 30m

Chicago Midway

Tue 3/24

6:34 pm-6:35 am

3 stops35h 01m

$971

LondonChicago

YXU - MDW

YXUMDW

London

Fri 3/6

7:30 am-5:34 pm

3 stops35h 04m

Chicago Midway

Tue 3/10

9:35 am-7:03 pm

3 stops32h 28m

$1,144

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 22 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 $80). Flying from London, Ontario to Illinois in March 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 $446, WestJet can have you in Illinois from London, Ontario in 6h 30m. 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 $80). Flying from London, Ontario to Illinois in March 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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