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Cheap flights from Illinois to London, ON from C$ 348

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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YXU
19 Feb — 26 Feb1
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 20 January 2026.

Mon 25/55:30 p.m.
ORD
-
YXU
1 stop10h 42m
WestJet
Thu 28/58:00 p.m.
YXU
-
ORD
1 stop21h 43m
WestJet
Deal found 19/1C$ 666
Mon 16/22:20 p.m.
ORD
-
YXU
1 stop15h 15m
WestJet
Thu 26/28:10 p.m.
YXU
-
ORD
1 stop18h 25m
WestJet
Deal found 18/1C$ 711
Mon 16/22:20 p.m.
ORD
-
YXU
1 stop15h 15m
Multiple Airlines
Mon 2/38:10 p.m.
YXU
-
ORD
2 stops21h 42m
Multiple Airlines
Deal found 18/1C$ 773
Wed 18/26:02 p.m.
ORD
-
YXU
2 stops35h 33m
Multiple Airlines
Thu 26/28:10 p.m.
YXU
-
ORD
1 stop18h 25m
Multiple Airlines
Deal found 18/1C$ 779
Mon 16/24:42 p.m.
ORD
-
YXU
2 stops36h 53m
Multiple Airlines
Thu 26/28:10 p.m.
YXU
-
ORD
1 stop18h 25m
Multiple Airlines
Deal found 18/1C$ 788
Mon 16/22:20 p.m.
ORD
-
YXU
1 stop15h 15m
Multiple Airlines
Fri 27/27:30 a.m.
YXU
-
ORD
2 stops17h 26m
Multiple Airlines
Deal found 18/1C$ 804
Tue 17/23:55 p.m.
ORD
-
YXU
1 stop4h 26m
Air Canada
Wed 25/25:10 a.m.
YXU
-
ORD
1 stop5h 03m
Air Canada
Deal found 18/1C$ 812
Mon 16/22:20 p.m.
ORD
-
YXU
1 stop15h 15m
WestJet
Sun 1/38:10 p.m.
YXU
-
ORD
1 stop18h 25m
WestJet
Deal found 18/1C$ 813
Thu 5/36:00 a.m.
ORD
-
YXU
2 stops23h 35m
Multiple Airlines
Thu 12/38:10 p.m.
YXU
-
ORD
1 stop18h 25m
Multiple Airlines
Deal found 19/1C$ 826
Tue 17/27:15 a.m.
ORD
-
YXU
2 stops8h 50m
Air Canada
Mon 2/35:10 a.m.
YXU
-
ORD
2 stops10h 45m
Air Canada
Deal found 18/1C$ 836
Wed 4/38:30 a.m.
STL
-
YXU
2 stops11h 51m
United Airlines
Wed 11/39:25 a.m.
YXU
-
STL
2 stops13h 17m
United Airlines
Deal found 18/1C$ 1,322
Mon 2/34:05 p.m.
STL
-
YXU
1 stop4h 16m
Air Canada
Wed 4/39:25 a.m.
YXU
-
STL
1 stop7h 04m
Air Canada
Deal found 17/1C$ 1,344

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 20 January 2026.

Round-trip from

C$ 666

One-way from

C$ 348
WestJet
  • WestJet
  • 25/5-28/5
  • 2 total stops
  • 32h 25m total
  • Illinois to London
Search Deals
10/2
  • 10/2
  • 2 total stops
  • 21h 35m 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 20 January 2026.
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 16/2

2:20 p.m.-6:35 a.m.

1 stop15h 15m

London

Thu 26/2

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

1 stop18h 25m

C$ 711

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 16/2

2:20 p.m.-6:35 a.m.

1 stop15h 15m

London

Mon 2/3

8:10 p.m.-4:52 p.m.

2 stops21h 42m

C$ 773

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 16/2

4:42 p.m.-6:35 a.m.

2 stops36h 53m

London

Thu 26/2

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

1 stop18h 25m

C$ 788

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 16/2

2:20 p.m.-6:35 a.m.

1 stop15h 15m

London

Fri 27/2

7:30 a.m.-11:56 p.m.

2 stops17h 26m

C$ 804

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 20/2

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

1 stop6h 05m

London

Tue 24/2

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

1 stop4h 36m

C$ 812

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sat 21/2

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

1 stop6h 21m

London

Fri 27/2

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

1 stop4h 36m

C$ 812

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Wed 18/2

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

1 stop6h 21m

London

Tue 24/2

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

1 stop5h 03m

C$ 812

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 19/2

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

1 stop4h 26m

London

Sun 1/3

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

1 stop6h 45m

C$ 812

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 20/2

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

1 stop6h 05m

London

Mon 2/3

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

1 stop5h 03m

C$ 812

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Tue 24/2

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

1 stop6h 05m

London

Wed 25/2

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

1 stop4h 36m

C$ 812

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/1

Showing 1-10 of 18 results
1
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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$ 118). Flying from Illinois to London, Ontario in December is currently the most expensive (average of C$ 293). 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 WestJet, Air Canada, and United Airlines fly from Illinois to London, Ontario in about 6h 05m. The time it takes to get you to your destination can typically vary by up to 9h 10m. 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$ 118). Flying from Illinois to London, Ontario in December is currently the most expensive (average of C$ 293). 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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How does Cheapflights help users find flights from Illinois to London?

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Can Cheapflights find flights from Illinois to London with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Illinois to London flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Illinois to London become cheaper?

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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