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Cheap flights from London, ON to Illinois from C$ 233

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 29/9. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
21 Aug — 28 Aug1
1 adult

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 16 August 2025.

Round-trip from

C$ 649

One-way from

C$ 233
Air Canada
  • Air Canada
  • 5/12-31/12
  • 3 total stops
  • 16h 31m total
  • London to Illinois
Search Deals
WestJet
  • WestJet
  • 29/9
  • 1 total stop
  • 11h 43m total
  • London to Illinois
Search Deals

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 16 August 2025.

Thu 4/129:25 a.m.YXU - ORD
1 stop6h 45mAir Canada
Wed 31/127:15 a.m.ORD - YXU
2 stops8h 51mAir Canada
Deal found 16/8C$ 649
Tue 9/125:45 a.m.YXU - ORD
2 stops10h 10mAir Canada
Fri 2/17:15 a.m.ORD - YXU
2 stops8h 51mAir Canada
Deal found 14/8C$ 650
Sun 7/125:45 a.m.YXU - ORD
2 stops10h 10mAir Canada
Thu 1/17:15 a.m.ORD - YXU
2 stops8h 51mAir Canada
Deal found 14/8C$ 679
Mon 8/129:25 a.m.YXU - ORD
1 stop11h 05mAir Canada
Wed 31/122:00 p.m.ORD - YXU
1 stop6h 21mAir Canada
Deal found 16/8C$ 699
Sun 7/129:25 a.m.YXU - ORD
1 stop4h 36mAir Canada
Sat 3/13:55 p.m.ORD - YXU
1 stop4h 26mAir Canada
Deal found 14/8C$ 715
Sun 7/125:40 p.m.YXU - ORD
2 stops7h 03mUnited Airlines
Wed 31/1211:07 a.m.ORD - YXU
2 stops9h 14mUnited Airlines
Deal found 16/8C$ 751
Sat 30/86:15 a.m.YXU - ORD
1 stop3h 54mAir Canada
Sun 31/89:55 a.m.ORD - YXU
1 stop4h 07mAir Canada
Deal found 15/8C$ 856
Sat 30/86:15 a.m.YXU - ORD
2 stops18h 44mUnited Airlines
Sun 31/89:55 a.m.ORD - YXU
1 stop4h 07mUnited Airlines
Deal found 15/8C$ 929
Thu 21/83:40 p.m.YXU - ORD
1 stop4h 49mUnited Airlines
Sun 24/87:00 a.m.ORD - YXU
2 stops7h 02mUnited Airlines
Deal found 14/8C$ 1,155
Thu 11/128:00 p.m.YXU - ORD
1 stop18h 35mMultiple Airlines
Sat 3/18:30 p.m.ORD - YXU
2 stops21h 42mMultiple Airlines
Deal found 14/8C$ 1,236
Thu 21/88:00 p.m.YXU - MDW
2 stops14h 36mWestJet
Sun 24/812:43 p.m.MDW - YXU
2 stops15h 31mWestJet
Deal found 14/8C$ 2,728
Tue 19/88:00 p.m.YXU - MDW
2 stops14h 36mWestJet
Thu 21/812:43 p.m.MDW - YXU
2 stops15h 31mWestJet
Deal found 15/8C$ 3,200

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 16 August 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

Fri 5/12

5:45 a.m.-2:55 p.m.

2 stops10h 10m

Chicago O'Hare Intl

Wed 31/12

2:00 p.m.-9:21 p.m.

1 stop6h 21m

C$ 649

LondonChicago

YXU - ORD

YXUORD

London

Thu 4/12

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

1 stop6h 45m

Chicago O'Hare Intl

Wed 31/12

7:15 a.m.-5:06 p.m.

2 stops8h 51m

C$ 649

LondonChicago

YXU - ORD

YXUORD

London

Sat 6/12

5:45 a.m.-2:55 p.m.

2 stops10h 10m

Chicago O'Hare Intl

Wed 31/12

2:00 p.m.-9:21 p.m.

1 stop6h 21m

C$ 649

LondonChicago

YXU - ORD

YXUORD

London

Wed 10/12

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

1 stop6h 45m

Chicago O'Hare Intl

Wed 31/12

7:15 a.m.-5:06 p.m.

2 stops8h 51m

C$ 649

LondonChicago

YXU - ORD

YXUORD

London

Tue 9/12

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

1 stop4h 36m

Chicago O'Hare Intl

Wed 31/12

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

1 stop4h 26m

C$ 649

LondonChicago

YXU - ORD

YXUORD

London

Sun 7/12

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

1 stop6h 45m

Chicago O'Hare Intl

Wed 31/12

2:00 p.m.-9:21 p.m.

1 stop6h 21m

C$ 649

LondonChicago

YXU - ORD

YXUORD

London

Mon 29/9

6:00 a.m.-4:43 p.m.

1 stop11h 43m

C$ 233

LondonChicago

YXU - MDW

YXUMDW

London

Mon 29/9

8:00 p.m.-3:58 p.m.

2 stops20h 58m

C$ 315

LondonChicago

YXU - ORD

YXUORD

London

Mon 29/9

8:00 p.m.-5:39 p.m.

2 stops22h 39m

C$ 315

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/8

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$ 261). Flying from London, Ontario to Illinois in March is currently the most expensive (average of C$ 352). 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 16 August 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
9,966 reviews
Check prices

Crew

7.8

Comfort

7.1

Overall

7.1

Entertainment

6.8

Boarding

7.3

Food

6.3

Reviews

1 / 20
8.0
Excellent

Jadi-Ann,Jun 2025

YYZ - KIN

The flight was smooth with minor turbulence. The staff was courteous. Since I have an aeroplan account I was able to use the inflight wifi. I wanted extra space and the window seat and I had to pay for that. At first, I was okay with that, however, I felt that it was the same distance between for everyone. Maybe I could be wrong.
Air Canada
7.1
Good
9,966 reviews
Air Canada
7.1
Good
9,966 reviews
Check prices

Crew

7.8

Comfort

7.1

Overall

7.1

Entertainment

6.8

Boarding

7.3

Food

6.3

Reviews

1 / 20
8.0
Excellent

Jadi-Ann,Jun 2025

YYZ - KIN

The flight was smooth with minor turbulence. The staff was courteous. Since I have an aeroplan account I was able to use the inflight wifi. I wanted extra space and the window seat and I had to pay for that. At first, I was okay with that, however, I felt that it was the same distance between for everyone. Maybe I could be wrong.

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.

  • 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$ 261). Flying from London, Ontario to Illinois in March is currently the most expensive (average of C$ 352). 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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