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Cheap flights from London, ON to Illinois from C$ 370

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 27/12. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
13 Dec — 20 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from London to Illinois

Enter your travel dates to find the best prices.

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 13 November 2025.

Thu 25/125:10 a.m.YXU - ORD
1 stop5h 03mAir Canada
Sat 27/1210:00 a.m.ORD - YXU
1 stop6h 05mAir Canada
Deal found 11/11C$ 710
Sun 28/129:25 a.m.YXU - ORD
1 stop4h 36mAir Canada
Sun 4/18:15 p.m.ORD - YXU
1 stop11h 31mAir Canada
Deal found 13/11C$ 778
Wed 10/125:40 p.m.YXU - ORD
2 stops7h 03mAir Canada
Wed 17/123:55 p.m.ORD - YXU
1 stop4h 26mAir Canada
Deal found 12/11C$ 792
Wed 10/125:10 a.m.YXU - ORD
2 stops11h 14mUnited Airlines
Wed 17/126:00 a.m.ORD - YXU
2 stops10h 05mUnited Airlines
Deal found 12/11C$ 820
Thu 25/125:10 a.m.YXU - ORD
2 stops14h 09mMultiple Airlines
Sat 27/123:35 p.m.ORD - YXU
2 stops16h 11mMultiple Airlines
Deal found 11/11C$ 841
Sun 28/125:10 a.m.YXU - ORD
2 stops15h 07mUnited Airlines
Sun 4/18:15 p.m.ORD - YXU
1 stop11h 31mUnited Airlines
Deal found 13/11C$ 906
Wed 10/128:10 p.m.YXU - ORD
2 stops24h 59mMultiple Airlines
Wed 17/121:34 p.m.ORD - YXU
3 stops28h 38mMultiple Airlines
Deal found 12/11C$ 944
Sat 27/129:25 a.m.YXU - ORD
1 stop4h 36mUnited Airlines
Sat 3/13:55 p.m.ORD - YXU
1 stop4h 26mUnited Airlines
Deal found 12/11C$ 1,030
Sat 27/125:10 a.m.YXU - ORD
2 stops7h 08mAir Canada
Sat 3/12:00 p.m.ORD - YXU
1 stop6h 21mAir Canada
Deal found 12/11C$ 1,094
Wed 10/128:10 p.m.YXU - MDW
3 stops20h 10mMultiple Airlines
Wed 17/121:50 p.m.MDW - YXU
3 stops28h 22mMultiple Airlines
Deal found 12/11C$ 1,468
Thu 25/128:10 p.m.YXU - MDW
3 stops20h 10mMultiple Airlines
Sat 27/125:59 p.m.MDW - YXU
3 stops35h 35mMultiple Airlines
Deal found 11/11C$ 1,925
Wed 10/128:10 p.m.YXU - MDW
2 stops23h 08mWestJet
Wed 17/121:50 p.m.MDW - YXU
2 stops28h 22mWestJet
Deal found 12/11C$ 2,272

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 13 November 2025.

Round-trip from

C$ 682

One-way from

C$ 370
Air Canada
  • Air Canada
  • 28/4-29/4
  • 2 total stops
  • 11h 13m total
  • London to Illinois
Search Deals
Air Canada
  • Air Canada
  • 27/12
  • 1 total stop
  • 4h 36m total
  • 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 629,999 searches. Data last updated 13 November 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

Sun 5/4

9:25 a.m.-1:00 p.m.

1 stop4h 35m

Chicago O'Hare Intl

Wed 8/4

9:50 a.m.-5:03 p.m.

1 stop6h 13m

C$ 682

LondonChicago

YXU - ORD

YXUORD

London

Tue 28/4

5:10 a.m.-9:10 a.m.

1 stop5h 00m

Chicago O'Hare Intl

Wed 29/4

9:50 a.m.-5:03 p.m.

1 stop6h 13m

C$ 682

LondonChicago

YXU - ORD

YXUORD

London

Thu 25/12

5:10 a.m.-9:13 a.m.

1 stop5h 03m

Chicago O'Hare Intl

Sat 27/12

10:00 a.m.-5:05 p.m.

1 stop6h 05m

C$ 710

LondonChicago

YXU - ORD

YXUORD

London

Wed 10/12

5:10 a.m.-9:13 a.m.

1 stop5h 03m

Chicago O'Hare Intl

Wed 17/12

3:55 p.m.-9:21 p.m.

1 stop4h 26m

C$ 710

LondonChicago

YXU - ORD

YXUORD

London

Sun 5/4

8:10 p.m.-1:35 p.m.

1 stop18h 25m

Chicago O'Hare Intl

Wed 8/4

7:05 a.m.-6:35 a.m.

3 stops22h 30m

C$ 720

LondonChicago

YXU - ORD

YXUORD

London

Sun 28/12

9:25 a.m.-1:01 p.m.

1 stop4h 36m

Chicago O'Hare Intl

Sun 4/1

8:15 p.m.-8:46 a.m.

1 stop11h 31m

C$ 778

LondonChicago

YXU - ORD

YXUORD

London

Wed 10/12

5:10 a.m.-3:24 p.m.

2 stops11h 14m

Chicago O'Hare Intl

Wed 17/12

6:00 a.m.-5:05 p.m.

2 stops10h 05m

C$ 820

LondonChicago

YXU - ORD

YXUORD

London

Thu 25/12

5:10 a.m.-6:19 p.m.

2 stops14h 09m

Chicago O'Hare Intl

Sat 27/12

3:35 p.m.-8:46 a.m.

2 stops16h 11m

C$ 841

LondonChicago

YXU - MDW

YXUMDW

London

Sun 5/4

8:10 p.m.-3:20 p.m.

3 stops20h 10m

Chicago Midway

Wed 8/4

11:00 a.m.-6:35 a.m.

3 stops18h 35m

C$ 969

LondonChicago

YXU - MDW

YXUMDW

London

Sun 5/4

8:10 p.m.-1:08 p.m.

2 stops17h 58m

Chicago Midway

Wed 8/4

9:20 a.m.-6:35 a.m.

2 stops20h 15m

C$ 1,321

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 19 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 C$ 118). Flying from London, Ontario to Illinois in December is currently the most expensive (average of C$ 269). 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.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 13 November 2025.
Read reviews from past customers who have flown Air Canada from London to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,448 reviews
Check prices

Food

6.3

Overall

7.1

Boarding

7.3

Comfort

7.1

Crew

7.8

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.
Air Canada
7.1
Good
10,448 reviews
Air Canada
7.1
Good
10,448 reviews
Check prices

Food

6.3

Overall

7.1

Boarding

7.3

Comfort

7.1

Crew

7.8

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.

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?

    If you book a flight to Illinois from London, you will be flying from London, which is the city’s only airport. London (YXU) is located 8.6 km from the centre of London.

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

    There are many flights that can get you from London, Ontario to Illinois in 4h 35m. Fly via Air Canada or WestJet to get the fastest option. Airlines will cover a distance of 565 km. Both multi-stop and direct flights can be found to your destination and back.

  • 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 C$ 118). Flying from London, Ontario to Illinois in December is currently the most expensive (average of C$ 269). 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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Fly with Cheapflights

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How does Cheapflights help users find flights from London to Illinois?

Cheapflights makes it easy to find London to Illinois flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from London to Illinois?

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Can Cheapflights find flights from London to Illinois with no change fees?

Yes! Cheapflights helps users easily find flights from London to Illinois with no change fees.

Can Cheapflights notify me if prices for flights from London to Illinois become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Illinois from London today and book when prices fit your budget.

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