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Cheap flights from London, ON to Illinois from C$ 333

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 17/2. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
5 Feb — 12 Feb1
1 adult
1 adult, Economy, 0 bags

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 6 January 2026.

Round-trip from

C$ 619

One-way from

C$ 333
Air Canada
  • Air Canada
  • 23/2-26/2
  • 2 total stops
  • 9h 02m total
  • London to Illinois
Search Deals
17/2
  • 17/2
  • 2 total stops
  • 42h 55m total
  • London to Illinois
Search Deals

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 6 January 2026.

Mon 23/29:25 a.m.YXU - ORD
1 stop4h 36mAir Canada
Thu 26/23:55 p.m.ORD - YXU
1 stop4h 26mAir Canada
Deal found 5/1C$ 619
Thu 19/25:40 p.m.YXU - ORD
1 stop5h 24mUnited Airlines
Thu 26/26:00 a.m.ORD - YXU
2 stops10h 05mUnited Airlines
Deal found 5/1C$ 694
Mon 23/25:10 a.m.YXU - ORD
2 stops11h 21mUnited Airlines
Thu 26/27:10 a.m.ORD - YXU
2 stops8h 55mUnited Airlines
Deal found 5/1C$ 699
Tue 3/25:10 a.m.YXU - ORD
1 stop5h 03mAir Canada
Tue 10/210:00 a.m.ORD - YXU
1 stop6h 05mAir Canada
Deal found 4/1C$ 713
Tue 3/25:40 p.m.YXU - ORD
2 stops6h 59mUnited Airlines
Tue 10/21:00 p.m.ORD - YXU
2 stops7h 21mUnited Airlines
Deal found 4/1C$ 790
Mon 23/28:10 p.m.YXU - MDW
2 stops14h 44mWestJet
Thu 26/29:50 a.m.MDW - YXU
2 stops19h 45mWestJet
Deal found 4/1C$ 1,802
Thu 19/28:10 p.m.YXU - MDW
2 stops23h 30mWestJet
Thu 26/29:50 a.m.MDW - YXU
2 stops19h 45mWestJet
Deal found 5/1C$ 2,105

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 6 January 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

Mon 23/2

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

1 stop4h 36m

Chicago O'Hare Intl

Thu 26/2

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

1 stop4h 26m

C$ 619

LondonChicago

YXU - ORD

YXUORD

London

Thu 19/2

5:40 p.m.-10:04 p.m.

1 stop5h 24m

Chicago O'Hare Intl

Thu 26/2

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

2 stops10h 05m

C$ 694

LondonChicago

YXU - ORD

YXUORD

London

Mon 23/2

5:10 a.m.-3:31 p.m.

2 stops11h 21m

Chicago O'Hare Intl

Thu 26/2

7:10 a.m.-5:05 p.m.

2 stops8h 55m

C$ 699

LondonChicago

YXU - ORD

YXUORD

London

Tue 3/2

5:10 a.m.-11:06 a.m.

2 stops6h 56m

Chicago O'Hare Intl

Tue 10/2

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

1 stop6h 05m

C$ 725

LondonChicago

YXU - MDW

YXUMDW

London

Mon 23/2

8:10 p.m.-9:54 a.m.

2 stops14h 44m

Chicago Midway

Thu 26/2

9:50 a.m.-6:35 a.m.

2 stops19h 45m

C$ 1,802

LondonChicago

YXU - MDW

YXUMDW

London

Thu 19/2

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

2 stops23h 30m

Chicago Midway

Thu 26/2

9:50 a.m.-6:35 a.m.

2 stops19h 45m

C$ 2,105

LondonChicago

YXU - ORD

YXUORD

London

Tue 17/2

8:10 p.m.-2:05 p.m.

2 stops42h 55m

C$ 333

LondonChicago

YXU - ORD

YXUORD

London

Fri 20/2

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

1 stop4h 36m

C$ 337

LondonChicago

YXU - ORD

YXUORD

London

Tue 17/2

9:25 a.m.-3:10 p.m.

1 stop6h 45m

C$ 339

LondonChicago

YXU - ORD

YXUORD

London

Thu 19/2

5:10 a.m.-11:06 a.m.

2 stops6h 56m

C$ 343

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/1

Showing 1-10 of 15 results
1
2

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$ 113). Flying from London, Ontario to Illinois in March is currently the most expensive (average of C$ 262). 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 6 January 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
10,599 reviews
Check prices

Overall

7.1

Entertainment

6.8

Comfort

7.1

Food

6.3

Boarding

7.3

Crew

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍
Air Canada
7.1
Good
10,599 reviews
Air Canada
7.1
Good
10,599 reviews
Check prices

Overall

7.1

Entertainment

6.8

Comfort

7.1

Food

6.3

Boarding

7.3

Crew

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍

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 36m. Fly via Air Canada, United Airlines, 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$ 113). Flying from London, Ontario to Illinois in March is currently the most expensive (average of C$ 262). 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?

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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