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Cheap flights from London, ON to Illinois from C$ 305

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 30/4. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
20 Apr — 27 Apr1
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 21 March 2026.

Thu 21/55:55 p.m.
YXU
-
ORD
1 stop23h 45m
WestJet
Thu 28/55:30 p.m.
ORD
-
YXU
1 stop10h 50m
WestJet
Deal found 19/3C$ 681
Sun 19/45:40 p.m.
YXU
-
ORD
2 stops15h 06m
United Airlines
Thu 23/49:50 a.m.
ORD
-
YXU
1 stop6h 14m
United Airlines
Deal found 18/3C$ 694
Thu 30/49:25 a.m.
YXU
-
ORD
1 stop4h 40m
Air Canada
Mon 4/53:50 p.m.
ORD
-
YXU
1 stop4h 48m
Air Canada
Deal found 19/3C$ 700
Fri 11/125:45 a.m.
YXU
-
ORD
1 stop6h 13m
Air Canada
Sun 13/124:00 p.m.
ORD
-
YXU
1 stop4h 46m
Air Canada
Deal found 16/3C$ 701
Sat 16/512:20 p.m.
YXU
-
ORD
1 stop5h 39m
Air Canada
Sun 24/53:50 p.m.
ORD
-
YXU
1 stop4h 48m
Air Canada
Deal found 20/3C$ 731
Sat 16/512:20 p.m.
YXU
-
ORD
2 stops9h 19m
United Airlines
Sun 24/58:40 a.m.
ORD
-
YXU
2 stops7h 53m
United Airlines
Deal found 20/3C$ 790
Sat 16/56:10 a.m.
YXU
-
MDW
2 stops13h 23m
WestJet
Sun 24/51:22 p.m.
MDW
-
YXU
2 stops14h 58m
WestJet
Deal found 20/3C$ 1,448
Wed 15/48:10 p.m.
YXU
-
MDW
3 stops23h 26m
WestJet
Wed 22/49:27 a.m.
MDW
-
YXU
3 stops20h 08m
WestJet
Deal found 18/3C$ 1,767
Fri 31/76:10 a.m.
YXU
-
MDW
3 stops39h 13m
Multiple Airlines
Sun 2/89:30 a.m.
MDW
-
YXU
3 stops30h 15m
Multiple Airlines
Deal found 19/3C$ 2,193
Thu 30/46:10 a.m.
YXU
-
MDW
2 stops12h 48m
WestJet
Mon 4/59:29 a.m.
MDW
-
YXU
2 stops30h 16m
WestJet
Deal found 20/3C$ 2,235
Mon 13/48:10 p.m.
YXU
-
MDW
2 stops23h 26m
WestJet
Mon 20/410:41 a.m.
MDW
-
YXU
2 stops18h 54m
WestJet
Deal found 16/3C$ 2,288
Mon 20/76:10 a.m.
YXU
-
MDW
2 stops12h 55m
WestJet
Wed 22/79:20 a.m.
MDW
-
YXU
2 stops19h 00m
WestJet
Deal found 16/3C$ 2,327

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 21 March 2026.

Round-trip from

C$ 681

One-way from

C$ 305
WestJet
  • WestJet
  • 21/5-28/5
  • 2 total stops
  • 34h 35m total
  • London to Illinois
Search Deals
WestJet
  • WestJet
  • 30/4
  • 1 total stop
  • 11h 30m 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 21 March 2026.
Use the filters below to find and compare flights from London to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonChicago

YXU - ORD

YXUORD

London

Thu 21/5

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

1 stop23h 45m

Chicago O'Hare Intl

Thu 28/5

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

1 stop10h 50m

C$ 681

LondonChicago

YXU - ORD

YXUORD

London

Sun 19/4

5:40 p.m.-7:46 a.m.

2 stops15h 06m

Chicago O'Hare Intl

Thu 23/4

9:50 a.m.-5:04 p.m.

1 stop6h 14m

C$ 694
Quickest round-trip

LondonChicago

YXU - ORD

YXUORD

London

Thu 30/4

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

1 stop4h 40m

Chicago O'Hare Intl

Mon 4/5

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

1 stop4h 48m

C$ 700

LondonChicago

YXU - ORD

YXUORD

London

Sat 16/5

12:20 p.m.-6:58 p.m.

2 stops7h 38m

Chicago O'Hare Intl

Sun 24/5

10:43 a.m.-5:33 p.m.

1 stop5h 50m

C$ 784

LondonChicago

YXU - ORD

YXUORD

London

Fri 31/7

9:30 a.m.-1:22 p.m.

1 stop4h 52m

Chicago O'Hare Intl

Sun 2/8

6:00 a.m.-3:00 p.m.

2 stops8h 00m

C$ 785

LondonChicago

YXU - ORD

YXUORD

London

Sat 16/5

12:20 p.m.-8:39 p.m.

2 stops9h 19m

Chicago O'Hare Intl

Sun 24/5

8:40 a.m.-5:33 p.m.

2 stops7h 53m

C$ 790

LondonChicago

YXU - ORD

YXUORD

London

Thu 21/5

9:30 a.m.-5:02 p.m.

2 stops8h 32m

Chicago O'Hare Intl

Thu 28/5

8:40 a.m.-5:33 p.m.

2 stops7h 53m

C$ 792

LondonChicago

YXU - ORD

YXUORD

London

Thu 30/4

5:40 p.m.-11:44 p.m.

2 stops7h 04m

Chicago O'Hare Intl

Mon 4/5

12:55 p.m.-9:38 p.m.

2 stops7h 43m

C$ 822

LondonChicago

YXU - MDW

YXUMDW

London

Sat 16/5

6:10 a.m.-6:33 p.m.

2 stops13h 23m

Chicago Midway

Sun 24/5

1:22 p.m.-5:20 a.m.

2 stops14h 58m

C$ 1,448

LondonChicago

YXU - MDW

YXUMDW

London

Wed 15/4

8:10 p.m.-6:36 p.m.

3 stops23h 26m

Chicago Midway

Wed 22/4

9:27 a.m.-6:35 a.m.

3 stops20h 08m

C$ 1,767

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/3

Showing 1-10 of 28 resultsSorted by cheapest first
1
2
3

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, January is the cheapest month in which you can book a flight from London, Ontario to Illinois (average of C$ 176). Flying from London, Ontario to Illinois in April is currently the most expensive (average of C$ 291). 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 21 March 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
10,819 reviews
Check prices

Comfort

7.1

Entertainment

6.8

Crew

7.8

Food

6.3

Overall

7.1

Boarding

7.3

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
10,819 reviews
Air Canada
7.1
Good
10,819 reviews
Check prices

Comfort

7.1

Entertainment

6.8

Crew

7.8

Food

6.3

Overall

7.1

Boarding

7.3

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, January is the cheapest month in which you can book a flight from London, Ontario to Illinois (average of C$ 176). Flying from London, Ontario to Illinois in April is currently the most expensive (average of C$ 291). 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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