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Cheap flights from London, ON to Illinois from C$ 369

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 19/12. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
4 Dec — 11 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 4 November 2025.

Thu 18/129:25 a.m.YXU - ORD
1 stop4h 36mAir Canada
Thu 25/123:55 p.m.ORD - YXU
1 stop4h 26mAir Canada
Deal found 3/11C$ 684
Thu 18/129:25 a.m.YXU - ORD
1 stop4h 36mUnited Airlines
Thu 25/128:50 a.m.ORD - YXU
2 stops7h 15mUnited Airlines
Deal found 4/11C$ 755
Fri 28/115:15 a.m.YXU - ORD
1 stop8h 46mAir Canada
Sat 29/1110:00 a.m.ORD - YXU
1 stop6h 05mAir Canada
Deal found 1/11C$ 790
Fri 28/115:40 p.m.YXU - ORD
2 stops7h 03mMultiple Airlines
Sat 29/117:05 a.m.ORD - YXU
2 stops9h 00mMultiple Airlines
Deal found 1/11C$ 814
Sat 22/115:15 a.m.YXU - ORD
1 stop4h 58mAir Canada
Fri 28/113:55 p.m.ORD - YXU
1 stop4h 26mAir Canada
Deal found 4/11C$ 827
Fri 19/129:25 a.m.YXU - ORD
1 stop6h 45mUnited Airlines
Fri 26/128:51 a.m.ORD - YXU
2 stops11h 30mUnited Airlines
Deal found 4/11C$ 859
Wed 17/129:25 a.m.YXU - ORD
1 stop4h 36mUnited Airlines
Wed 24/126:00 p.m.ORD - YXU
2 stops22h 05mUnited Airlines
Deal found 3/11C$ 886
Sat 22/119:25 a.m.YXU - ORD
2 stops10h 06mUnited Airlines
Fri 28/1110:00 a.m.ORD - YXU
2 stops10h 21mUnited Airlines
Deal found 4/11C$ 896
Wed 17/128:10 p.m.YXU - MDW
3 stops20h 10mMultiple Airlines
Wed 24/1211:00 a.m.MDW - YXU
3 stops18h 34mMultiple Airlines
Deal found 3/11C$ 1,791
Wed 17/128:10 p.m.YXU - MDW
2 stops23h 08mWestJet
Wed 24/129:50 a.m.MDW - YXU
2 stops19h 44mWestJet
Deal found 3/11C$ 2,325
Thu 18/128:10 p.m.YXU - MDW
2 stops14h 44mWestJet
Thu 25/1211:48 a.m.MDW - YXU
2 stops17h 46mWestJet
Deal found 3/11C$ 2,582
Mon 17/118:10 p.m.YXU - MDW
2 stops14h 42mWestJet
Tue 18/111:47 p.m.MDW - YXU
2 stops28h 25mWestJet
Deal found 3/11C$ 2,806

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 4 November 2025.

Round-trip from

C$ 682

One-way from

C$ 369
Air Canada
  • Air Canada
  • 28/4-29/4
  • 2 total stops
  • 10h 53m total
  • London to Illinois
Search Deals
Air Canada
  • Air Canada
  • 19/12
  • 1 total stop
  • 6h 45m 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 4 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

Tue 28/4

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

1 stop4h 35m

Chicago O'Hare Intl

Wed 29/4

2:00 p.m.-9:18 p.m.

1 stop6h 18m

C$ 682

LondonChicago

YXU - ORD

YXUORD

London

Thu 18/12

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

1 stop4h 36m

Chicago O'Hare Intl

Thu 25/12

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

1 stop4h 26m

C$ 684

LondonChicago

YXU - ORD

YXUORD

London

Thu 18/12

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

1 stop4h 36m

Chicago O'Hare Intl

Thu 25/12

8:50 a.m.-5:05 p.m.

2 stops7h 15m

C$ 755

LondonChicago

YXU - ORD

YXUORD

London

Fri 28/11

5:15 a.m.-1:01 p.m.

1 stop8h 46m

Chicago O'Hare Intl

Sat 29/11

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

2 stops9h 00m

C$ 790

LondonChicago

YXU - ORD

YXUORD

London

Fri 28/11

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

2 stops7h 03m

Chicago O'Hare Intl

Sat 29/11

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

2 stops9h 00m

C$ 814

LondonChicago

YXU - MDW

YXUMDW

London

Wed 17/12

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

3 stops20h 10m

Chicago Midway

Wed 24/12

11:00 a.m.-6:34 a.m.

3 stops18h 34m

C$ 1,791

LondonChicago

YXU - MDW

YXUMDW

London

Tue 14/4

8:00 a.m.-9:51 a.m.

2 stops26h 51m

Chicago Midway

Thu 16/4

10:35 a.m.-6:35 a.m.

2 stops19h 00m

C$ 1,955

LondonChicago

YXU - MDW

YXUMDW

London

Wed 17/12

8:10 p.m.-6:18 p.m.

2 stops23h 08m

Chicago Midway

Wed 24/12

9:50 a.m.-6:34 a.m.

2 stops19h 44m

C$ 2,325

LondonChicago

YXU - MDW

YXUMDW

London

Thu 18/12

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

2 stops14h 44m

Chicago Midway

Thu 25/12

11:48 a.m.-6:34 a.m.

2 stops17h 46m

C$ 2,582

LondonChicago

YXU - MDW

YXUMDW

London

Mon 17/11

8:10 p.m.-9:52 a.m.

2 stops14h 42m

Chicago Midway

Tue 18/11

1:47 p.m.-7:12 p.m.

2 stops28h 25m

C$ 2,806

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/11

Showing 1-10 of 23 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 February is currently the most expensive (average of C$ 267). 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 4 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
10,403 reviews
Check prices

Crew

7.8

Overall

7.1

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Food

6.3

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
10,403 reviews
Air Canada
7.1
Good
10,403 reviews
Check prices

Crew

7.8

Overall

7.1

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Food

6.3

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.

  • What are the cheapest airlines to fly from London, Ontario to Illinois one-way?

    For one-way options, check prices for Air Canada. According to our data, you can fly for as low as C$ 369. Users have also found prices from C$ 465 and C$ 825 on United Airlines and WestJet, respectively.

  • 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 February is currently the most expensive (average of C$ 267). 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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