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Cheap flights from London, ON to Illinois from C$ 409

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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
2 Apr — 9 Apr1
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 28 March 2025.

Round-trip from

C$ 983

One-way from

C$ 409
Air Canada
  • Air Canada
  • 19/5-22/5
  • 2 total stops
  • 11h 14m total
  • London to Illinois
Search Deals
10/5
  • 10/5
  • 2 total stops
  • 18h 34m 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 28 March 2025.

Mon 19/56:15 a.m.YXU - ORD
1 stop4h 46mAir Canada
Thu 22/52:00 p.m.ORD - YXU
1 stop6h 28mAir Canada
Deal found 27/3C$ 983
Mon 19/59:55 a.m.YXU - ORD
2 stops9h 31mUnited Airlines
Thu 22/52:00 p.m.ORD - YXU
1 stop6h 28mUnited Airlines
Deal found 27/3C$ 992

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 28 March 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

Mon 19/5

6:15 a.m.-10:01 a.m.

1 stop4h 46m

Chicago O'Hare Intl

Thu 22/5

2:00 p.m.-9:28 p.m.

1 stop6h 28m

C$ 983

LondonChicago

YXU - ORD

YXUORD

London

Mon 19/5

9:55 a.m.-6:26 p.m.

2 stops9h 31m

Chicago O'Hare Intl

Thu 22/5

2:00 p.m.-9:28 p.m.

1 stop6h 28m

C$ 992

LondonChicago

YXU - MDW

YXUMDW

London

Sat 10/5

8:00 p.m.-1:34 p.m.

2 stops18h 34m

C$ 409

LondonChicago

YXU - ORD

YXUORD

London

Sat 10/5

8:00 p.m.-11:00 a.m.

2 stops16h 00m

C$ 409

LondonChicago

YXU - ORD

YXUORD

London

Mon 12/5

8:00 p.m.-4:44 p.m.

1 stop21h 44m

C$ 457

LondonChicago

YXU - ORD

YXUORD

London

Sat 26/4

3:25 p.m.-7:30 p.m.

1 stop5h 05m

C$ 520

LondonChicago

YXU - ORD

YXUORD

London

Sat 26/4

5:15 a.m.-6:55 p.m.

2 stops14h 40m

C$ 522

LondonChicago

YXU - MDW

YXUMDW

London

Mon 12/5

8:00 p.m.-9:28 p.m.

2 stops26h 28m

C$ 989

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/3

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$ 261). Flying from London, Ontario to Illinois in March is currently the most expensive (average of C$ 355). 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.

What is the cheapest time of day to fly from YXU to IL?

Find hourly flight availability from London to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 March 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London, Ontario to Illinois as you normally would.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 mm per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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 28 March 2025.
United Airlines
7.4
Good
8,603 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.0

Food

6.6

Crew

8.1

Boarding

7.7

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
8,603 reviews
United Airlines
7.4
Good
8,603 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.0

Food

6.6

Crew

8.1

Boarding

7.7

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
2,785 reviews
United Airlines
7.4
Good
8,603 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.0

Food

6.6

Crew

8.1

Boarding

7.7

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
7.0
Good
8,981 reviews
United Airlines
7.4
Good
8,603 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.0

Food

6.6

Crew

8.1

Boarding

7.7

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 WestJet. According to our data, you can fly for as low as C$ 457. Users have also found prices from C$ 520 and C$ 522 on Air Canada and United Airlines, 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$ 355). 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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