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$259+ 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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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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 September 17, 2025.

Round-trip from

$372
(Kiwi.com)

One-way from

$259
(Air Canada)
From London to Illinois
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One-way flight from London to Illinois
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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 September 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/228:00 pmYXU - ORD
1 stop21h 43mWestJet
Sat 10/255:30 pmORD - YXU
1 stop24h 42mWestJet
Deal found 9/16$372
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/226:00 amYXU - ORD
2 stops18h 59mMultiple Airlines
Sat 10/255:30 pmORD - YXU
1 stop24h 42mMultiple Airlines
Deal found 9/16$434
This Air Canada deal was found by Cheapflights users on 9/15. 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.
Sun 11/29:25 amYXU - ORD
1 stop6h 45mAir Canada
Sun 11/92:00 pmORD - YXU
1 stop6h 21mAir Canada
Deal found 9/15$468
This Air Canada deal was found by Cheapflights users on 9/15. 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 11/85:15 amYXU - ORD
2 stops7h 03mAir Canada
Mon 11/1010:00 amORD - YXU
1 stop6h 05mAir Canada
Deal found 9/15$477
This Air Canada deal was found by Cheapflights users on 9/16. 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.
Wed 12/35:15 amYXU - ORD
1 stop4h 58mAir Canada
Sat 12/62:00 pmORD - YXU
1 stop6h 21mAir Canada
Deal found 9/16$478
This Air Canada deal was found by Cheapflights users on 9/16. 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.
Wed 10/229:55 amYXU - ORD
2 stops11h 22mAir Canada
Sat 10/2510:40 amORD - YXU
2 stops9h 47mAir Canada
Deal found 9/16$488
This Air Canada deal was found by Cheapflights users on 9/16. 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.
Fri 11/79:25 amYXU - ORD
1 stop6h 45mAir Canada
Mon 11/107:15 amORD - YXU
2 stops8h 50mAir Canada
Deal found 9/16$498
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sun 11/25:40 pmYXU - ORD
2 stops15h 01mUnited Airlines
Sun 11/910:00 amORD - YXU
1 stop6h 05mUnited Airlines
Deal found 9/15$528
This United deal was found by Cheapflights users on 9/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/85:45 amYXU - ORD
2 stops9h 54mMultiple Airlines
Mon 11/107:15 amORD - YXU
2 stops8h 50mMultiple Airlines
Deal found 9/15$535
This Mytrip deal was found by Cheapflights users on 9/16. 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 10/228:00 pmYXU - MDW
2 stops21h 24mMultiple Airlines
Sat 10/259:20 amMDW - YXU
3 stops32h 52mMultiple Airlines
Deal found 9/16$684
This Mytrip deal was found by Cheapflights users on 9/16. 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 12/38:10 pmYXU - MDW
3 stops20h 10mMultiple Airlines
Sat 12/61:50 pmMDW - YXU
3 stops28h 22mMultiple Airlines
Deal found 9/16$752
This Mytrip deal was found by Cheapflights users on 9/16. 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 10/226:00 amYXU - MDW
3 stops32h 08mWestJet
Sat 10/259:20 amMDW - YXU
3 stops32h 52mWestJet
Deal found 9/16$756

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 September 17, 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

Wed 10/22

8:00 pm-4:43 pm

1 stop21h 43m

Chicago O'Hare Intl

Sat 10/25

5:30 pm-7:12 pm

1 stop24h 42m

$372

LondonChicago

YXU - ORD

YXUORD

London

Wed 10/22

6:00 am-11:59 pm

2 stops18h 59m

Chicago O'Hare Intl

Sat 10/25

5:30 pm-7:12 pm

1 stop24h 42m

$434

LondonChicago

YXU - ORD

YXUORD

London

Sun 11/2

9:25 am-3:10 pm

1 stop6h 45m

Chicago O'Hare Intl

Sun 11/9

2:00 pm-9:21 pm

1 stop6h 21m

$468

LondonChicago

YXU - ORD

YXUORD

London

Sat 11/8

5:15 am-11:18 am

2 stops7h 03m

Chicago O'Hare Intl

Mon 11/10

10:00 am-5:05 pm

1 stop6h 05m

$477

LondonChicago

YXU - ORD

YXUORD

London

Wed 12/3

5:15 am-9:13 am

1 stop4h 58m

Chicago O'Hare Intl

Sat 12/6

2:00 pm-9:21 pm

1 stop6h 21m

$478

LondonChicago

YXU - ORD

YXUORD

London

Wed 10/22

9:55 am-8:17 pm

2 stops11h 22m

Chicago O'Hare Intl

Sat 10/25

10:40 am-9:27 pm

2 stops9h 47m

$488

LondonChicago

YXU - ORD

YXUORD

London

Fri 11/7

9:25 am-3:10 pm

1 stop6h 45m

Chicago O'Hare Intl

Mon 11/10

7:15 am-5:05 pm

2 stops8h 50m

$498

LondonChicago

YXU - ORD

YXUORD

London

Sun 11/2

5:40 pm-7:41 am

2 stops15h 01m

Chicago O'Hare Intl

Sun 11/9

10:00 am-5:05 pm

1 stop6h 05m

$528

LondonChicago

YXU - MDW

YXUMDW

London

Wed 10/22

8:00 pm-4:24 pm

2 stops21h 24m

Chicago Midway

Sat 10/25

9:20 am-7:12 pm

3 stops32h 52m

$684

LondonChicago

YXU - MDW

YXUMDW

London

Wed 12/3

8:10 pm-3:20 pm

3 stops20h 10m

Chicago Midway

Sat 12/6

1:50 pm-7:12 pm

3 stops28h 22m

$752

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

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, August is the cheapest month in which you can book a flight from London, Ontario to Illinois (average of $245). Flying from London, Ontario to Illinois in March is currently the most expensive (average of $321). 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 $468, WestJet can have you in Illinois from London, Ontario in 6h 45m. 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, August is the cheapest month in which you can book a flight from London, Ontario to Illinois (average of $245). Flying from London, Ontario to Illinois in March is currently the most expensive (average of $321). 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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