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Cheap flights from London, ON to Illinois from C$ 282

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 19/4. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
21 Mar — 28 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap 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 19 February 2026.

Wed 29/45:55 p.m.
YXU
-
ORD
1 stop23h 45m
WestJet
Sun 3/55:30 p.m.
ORD
-
YXU
1 stop10h 50m
WestJet
Deal found 17/2C$ 529
Fri 10/49:25 a.m.
YXU
-
ORD
1 stop4h 40m
Air Canada
Mon 13/49:50 a.m.
ORD
-
YXU
1 stop6h 13m
Air Canada
Deal found 15/2C$ 583
Fri 20/39:40 a.m.
YXU
-
ORD
1 stop6h 30m
Air Canada
Thu 26/31:55 p.m.
ORD
-
YXU
1 stop6h 26m
Air Canada
Deal found 18/2C$ 609
Fri 10/47:30 a.m.
YXU
-
ORD
2 stops15h 28m
Multiple Airlines
Mon 13/42:20 p.m.
ORD
-
YXU
1 stop15h 15m
Multiple Airlines
Deal found 15/2C$ 629
Fri 24/45:10 a.m.
YXU
-
ORD
1 stop5h 00m
Air Canada
Fri 1/53:50 p.m.
ORD
-
YXU
1 stop4h 48m
Air Canada
Deal found 17/2C$ 637
Wed 29/45:55 p.m.
YXU
-
ORD
2 stops21h 25m
Multiple Airlines
Sun 3/55:30 p.m.
ORD
-
YXU
1 stop10h 50m
Multiple Airlines
Deal found 17/2C$ 642
Fri 10/45:40 p.m.
YXU
-
ORD
2 stops7h 03m
United Airlines
Mon 13/41:00 p.m.
ORD
-
YXU
2 stops7h 18m
United Airlines
Deal found 15/2C$ 665
Tue 17/39:40 a.m.
YXU
-
ORD
1 stop6h 30m
Air Canada
Tue 24/31:55 p.m.
ORD
-
YXU
1 stop6h 26m
Air Canada
Deal found 17/2C$ 670
Fri 24/47:30 a.m.
YXU
-
ORD
2 stops31h 52m
Multiple Airlines
Fri 1/55:30 p.m.
ORD
-
YXU
1 stop10h 50m
Multiple Airlines
Deal found 17/2C$ 694
Sat 4/45:10 a.m.
YXU
-
ORD
1 stop5h 40m
United Airlines
Sat 11/49:50 a.m.
ORD
-
YXU
1 stop6h 13m
United Airlines
Deal found 18/2C$ 711
Tue 17/38:10 p.m.
YXU
-
MDW
3 stops23h 30m
WestJet
Tue 24/36:34 p.m.
MDW
-
YXU
3 stops35h 01m
WestJet
Deal found 17/2C$ 1,327
Fri 6/37:30 a.m.
YXU
-
MDW
3 stops35h 04m
Multiple Airlines
Tue 10/39:35 a.m.
MDW
-
YXU
3 stops32h 28m
Multiple Airlines
Deal found 16/2C$ 1,563

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 19 February 2026.

Round-trip from

C$ 529

One-way from

C$ 282
WestJet
  • WestJet
  • 29/4-3/5
  • 2 total stops
  • 34h 35m total
  • London to Illinois
Search Deals
WestJet
  • WestJet
  • 19/4
  • 1 total stop
  • 18h 25m 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 19 February 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 29/4

5:55 p.m.-4:40 p.m.

1 stop23h 45m

Chicago O'Hare Intl

Sun 3/5

5:30 p.m.-5:20 a.m.

1 stop10h 50m

C$ 529

LondonChicago

YXU - ORD

YXUORD

London

Fri 10/4

9:25 a.m.-1:05 p.m.

1 stop4h 40m

Chicago O'Hare Intl

Mon 13/4

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

1 stop6h 13m

C$ 583

LondonChicago

YXU - ORD

YXUORD

London

Fri 20/3

9:40 a.m.-3:10 p.m.

1 stop6h 30m

Chicago O'Hare Intl

Thu 26/3

1:55 p.m.-9:21 p.m.

1 stop6h 26m

C$ 609

LondonChicago

YXU - ORD

YXUORD

London

Fri 10/4

7:30 a.m.-9:58 p.m.

2 stops15h 28m

Chicago O'Hare Intl

Mon 13/4

2:20 p.m.-6:35 a.m.

1 stop15h 15m

C$ 629

LondonChicago

YXU - ORD

YXUORD

London

Fri 24/4

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

1 stop5h 00m

Chicago O'Hare Intl

Fri 1/5

3:50 p.m.-9:38 p.m.

1 stop4h 48m

C$ 637

LondonChicago

YXU - ORD

YXUORD

London

Fri 10/4

5:40 p.m.-11:43 p.m.

2 stops7h 03m

Chicago O'Hare Intl

Mon 13/4

1:00 p.m.-9:18 p.m.

2 stops7h 18m

C$ 665

LondonChicago

YXU - ORD

YXUORD

London

Tue 17/3

9:40 a.m.-3:10 p.m.

1 stop6h 30m

Chicago O'Hare Intl

Tue 24/3

1:55 p.m.-9:21 p.m.

1 stop6h 26m

C$ 670

LondonChicago

YXU - ORD

YXUORD

London

Fri 24/4

7:30 a.m.-2:22 p.m.

2 stops31h 52m

Chicago O'Hare Intl

Fri 1/5

5:30 p.m.-5:20 a.m.

1 stop10h 50m

C$ 694

LondonChicago

YXU - ORD

YXUORD

London

Sat 4/4

5:10 a.m.-9:50 a.m.

1 stop5h 40m

Chicago O'Hare Intl

Sat 11/4

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

1 stop6h 13m

C$ 711

LondonChicago

YXU - MDW

YXUMDW

London

Tue 17/3

8:10 p.m.-6:40 p.m.

3 stops23h 30m

Chicago Midway

Tue 24/3

6:34 p.m.-6:35 a.m.

3 stops35h 01m

C$ 1,327

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/2

Showing 1-10 of 24 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$ 109). Flying from London, Ontario to Illinois in March is currently the most expensive (average of C$ 260). 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 19 February 2026.
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
10,733 reviews
Check prices

Entertainment

6.8

Comfort

7.1

Boarding

7.3

Crew

7.8

Overall

7.1

Food

6.3

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.
Air Canada
7.1
Good
10,733 reviews
Air Canada
7.1
Good
10,733 reviews
Check prices

Entertainment

6.8

Comfort

7.1

Boarding

7.3

Crew

7.8

Overall

7.1

Food

6.3

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.

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 40m. Fly via WestJet or Air Canada 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$ 109). Flying from London, Ontario to Illinois in March is currently the most expensive (average of C$ 260). 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

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from London to Illinois for you. Better yet — we are completely free to use.

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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