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Cheap flights from London, ON to Illinois from C$ 338

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 8/8. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
1 Jul — 8 Jul1
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 26 June 2025.

Round-trip from

C$ 600

One-way from

C$ 338
Air Canada
  • Air Canada
  • 10/8-17/8
  • 2 total stops
  • 10h 06m total
  • London to Illinois
Search Deals
8/8
  • 8/8
  • 3 total stops
  • 25h 03m 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 26 June 2025.

Sun 10/86:15 a.m.YXU - ORD
1 stop3h 54mAir Canada
Sun 17/89:55 a.m.ORD - YXU
1 stop6h 12mAir Canada
Deal found 26/6C$ 600
Fri 8/86:00 a.m.YXU - ORD
3 stops25h 03mMultiple Airlines
Fri 15/86:00 a.m.ORD - YXU
3 stops22h 14mMultiple Airlines
Deal found 24/6C$ 701
Fri 8/86:15 a.m.YXU - ORD
1 stop3h 54mUnited Airlines
Fri 15/87:00 a.m.ORD - YXU
2 stops9h 07mUnited Airlines
Deal found 24/6C$ 738
Fri 8/86:00 a.m.YXU - MDW
2 stops12h 39mWestJet
Fri 15/89:15 a.m.MDW - YXU
3 stops18h 59mWestJet
Deal found 24/6C$ 1,884

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 26 June 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

Sun 10/8

6:15 a.m.-9:09 a.m.

1 stop3h 54m

Chicago O'Hare Intl

Sun 17/8

9:55 a.m.-5:07 p.m.

1 stop6h 12m

C$ 600

LondonChicago

YXU - ORD

YXUORD

London

Fri 8/8

6:00 a.m.-6:03 a.m.

3 stops25h 03m

Chicago O'Hare Intl

Fri 15/8

6:00 a.m.-5:14 a.m.

3 stops22h 14m

C$ 701

LondonChicago

YXU - ORD

YXUORD

London

Fri 8/8

6:15 a.m.-9:09 a.m.

1 stop3h 54m

Chicago O'Hare Intl

Fri 15/8

7:00 a.m.-5:07 p.m.

2 stops9h 07m

C$ 738

LondonChicago

YXU - MDW

YXUMDW

London

Fri 8/8

6:00 a.m.-5:39 p.m.

2 stops12h 39m

Chicago Midway

Fri 15/8

9:15 a.m.-5:14 a.m.

3 stops18h 59m

C$ 1,884

LondonChicago

YXU - ORD

YXUORD

London

Fri 8/8

6:00 a.m.-6:03 a.m.

3 stops25h 03m

C$ 338

LondonChicago

YXU - ORD

YXUORD

London

Fri 8/8

3:40 p.m.-7:29 p.m.

1 stop4h 49m

C$ 345

LondonChicago

YXU - ORD

YXUORD

London

Fri 8/8

9:55 a.m.-2:01 p.m.

1 stop5h 06m

C$ 396

LondonChicago

YXU - MDW

YXUMDW

London

Sun 10/8

6:00 a.m.-7:41 p.m.

2 stops14h 41m

C$ 459

LondonChicago

YXU - MDW

YXUMDW

London

Fri 8/8

6:00 a.m.-1:06 p.m.

3 stops32h 06m

C$ 819

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/6

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$ 351). 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 26 June 2025.
Read reviews from past customers who have flown United Airlines,WestJet, andAir Canada from London to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,838 reviews
Check prices

Boarding

7.7

Entertainment

7.0

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,838 reviews
United Airlines
7.4
Good
8,838 reviews
Check prices

Boarding

7.7

Entertainment

7.0

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
WestJet
7.2
Good
2,893 reviews
United Airlines
7.4
Good
8,838 reviews
Check prices

Boarding

7.7

Entertainment

7.0

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
Air Canada
7.1
Good
9,633 reviews
United Airlines
7.4
Good
8,838 reviews
Check prices

Boarding

7.7

Entertainment

7.0

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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.

  • 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$ 345. Users have also found prices from C$ 396 and C$ 819 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, 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$ 351). 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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