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Cheap flights from Illinois to London, ON from C$ 361

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 16/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YXU
1 Jan — 8 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to London

Enter your travel dates to find the best prices.

Cheapest flights from Illinois to London
Explore the most affordable flight options available from Illinois to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 December 2025.

Tue 30/123:55 p.m.ORD - YXU
1 stop4h 26mAir Canada
Tue 6/19:50 a.m.YXU - ORD
1 stop4h 11mAir Canada
Deal found 1/12C$ 893
Tue 30/121:24 p.m.ORD - YXU
2 stops6h 57mUnited Airlines
Tue 6/19:25 a.m.YXU - ORD
2 stops10h 12mUnited Airlines
Deal found 1/12C$ 1,215
Tue 30/126:44 p.m.ORD - YXU
3 stops34h 50mMultiple Airlines
Tue 6/18:10 p.m.YXU - ORD
3 stops24h 54mMultiple Airlines
Deal found 1/12C$ 1,781

Find flight deals from Illinois to London

Keep the following information in mind while searching for Illinois to London flight deals. Data was last updated 2 December 2025.

Round-trip from

C$ 400

One-way from

C$ 361
WestJet
  • WestJet
  • 30/5-4/6
  • 2 total stops
  • 22h 25m total
  • Illinois to London
Search Deals
15/1
  • 15/1
  • 3 total stops
  • 20h 34m total
  • Illinois to London
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to London 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 2 December 2025.
Use the filters below to find and compare flights from Illinois to London that are best for you.

Fly from

Illinois

Fly to

London

Route

Depart

Return

Price

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 12/1

4:49 p.m.-6:34 a.m.

2 stops36h 45m

London

Sun 18/1

8:10 p.m.-1:35 p.m.

1 stop18h 25m

C$ 596

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 15/1

5:15 a.m.-6:34 a.m.

3 stops24h 19m

London

Thu 22/1

8:10 p.m.-1:35 p.m.

1 stop18h 25m

C$ 674

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Wed 14/1

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

1 stop6h 21m

London

Wed 21/1

5:10 a.m.-9:13 a.m.

1 stop5h 03m

C$ 761

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sun 18/1

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

1 stop6h 05m

London

Thu 22/1

5:10 a.m.-9:13 a.m.

1 stop5h 03m

C$ 761

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 15/1

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

1 stop6h 21m

London

Thu 22/1

5:10 a.m.-9:13 a.m.

1 stop5h 03m

C$ 761

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Mon 12/1

4:05 p.m.-9:20 p.m.

1 stop4h 15m

London

Wed 14/1

9:50 a.m.-3:29 p.m.

1 stop6h 39m

C$ 1,155

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Mon 12/1

4:15 p.m.-9:21 p.m.

2 stops28h 06m

London

Wed 14/1

5:10 a.m.-8:58 p.m.

2 stops16h 48m

C$ 1,204

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Thu 15/1

12:44 p.m.-5:05 p.m.

2 stops27h 21m

London

Thu 22/1

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

2 stops25h 01m

C$ 1,249

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 16/1

6:06 p.m.-7:12 p.m.

3 stops48h 06m

C$ 361

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 15/1

9:00 a.m.-6:34 a.m.

3 stops20h 34m

C$ 361

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/12

Showing 1-10 of 12 results
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Best time to book a flight from Illinois to London

Have a flexible travel schedule? Discover the best time to fly to London from Illinois 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 Illinois to London

What is the cheapest month to book a flight from Illinois to London, Ontario?

Currently, October is the cheapest month in which you can book a flight from Illinois to London, Ontario (average of C$ 119). Flying from Illinois to London, Ontario in July is currently the most expensive (average of C$ 261). 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.

Related info for your journey

Find useful and relevant information for your journey from Illinois to London. 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 into for flights to London from Illinois?

    If you book a flight to London from Illinois, you will be flying to 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 Illinois to London, Ontario?

    Airlines like Air Canada and United Airlines fly from Illinois to London, Ontario in about 6h 21m. The time it takes to get you to your destination can typically vary by up to 21h 45m. Airlines will cover a distance of 565 km. This flight may include one or multiple stops.

  • Can I find deals for flights from Illinois to London that include hotel bookings?

    Yes. In addition to deals on Illinois to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to London.

  • Can I find deals for business class flights from Illinois to London?

    Yes. Cheapflights offers flight deals from Illinois to London 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 Illinois to London, Ontario?

    Currently, October is the cheapest month in which you can book a flight from Illinois to London, Ontario (average of C$ 119). Flying from Illinois to London, Ontario in July is currently the most expensive (average of C$ 261). 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Port Stanley
Grand Bend

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Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to London from Illinois today and book when prices fit your budget.

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