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Cheap flights from Illinois to London, ON from C$ 438

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 21/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YXU
24 May — 31 May1
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 24 April 2026.

Sat 23/55:30 p.m.
ORD
-
YXU
1 stop10h 50m
WestJet
Tue 26/55:55 p.m.
YXU
-
ORD
1 stop23h 45m
WestJet
Deal found 24/4C$ 621
Fri 5/69:55 a.m.
ORD
-
YXU
1 stop4h 03m
Air Canada
Mon 8/69:30 a.m.
YXU
-
ORD
1 stop6h 25m
Air Canada
Deal found 19/4C$ 854
Mon 25/53:50 p.m.
ORD
-
YXU
1 stop4h 48m
Air Canada
Thu 28/59:30 a.m.
YXU
-
ORD
1 stop4h 55m
Air Canada
Deal found 23/4C$ 855
Sat 23/52:15 p.m.
ORD
-
YXU
1 stop6h 23m
Air Canada
Tue 26/512:20 p.m.
YXU
-
ORD
2 stops8h 48m
Air Canada
Deal found 20/4C$ 866
Mon 21/92:40 p.m.
STL
-
YXU
1 stop6h 00m
Air Canada
Mon 28/910:05 a.m.
YXU
-
STL
1 stop4h 55m
Air Canada
Deal found 24/4C$ 889
Thu 9/78:55 a.m.
STL
-
YXU
1 stop5h 00m
Air Canada
Sun 12/79:30 a.m.
YXU
-
STL
1 stop5h 32m
Air Canada
Deal found 21/4C$ 933
Thu 4/62:15 p.m.
STL
-
YXU
1 stop6h 23m
Air Canada
Mon 8/63:30 p.m.
YXU
-
STL
1 stop5h 39m
Air Canada
Deal found 22/4C$ 934
Sun 7/65:30 p.m.
ORD
-
YXU
1 stop10h 50m
Multiple Airlines
Sun 14/66:10 a.m.
YXU
-
ORD
2 stops25h 09m
Multiple Airlines
Deal found 24/4C$ 944
Fri 15/52:15 p.m.
STL
-
YXU
1 stop6h 23m
Air Canada
Tue 19/55:10 a.m.
YXU
-
STL
1 stop7h 56m
Air Canada
Deal found 24/4C$ 967
Mon 18/59:55 a.m.
ORD
-
YXU
1 stop6h 38m
Air Canada
Sat 23/55:10 a.m.
YXU
-
ORD
1 stop4h 50m
Air Canada
Deal found 20/4C$ 971
Mon 25/510:43 a.m.
ORD
-
YXU
1 stop5h 50m
United Airlines
Thu 28/55:10 a.m.
YXU
-
ORD
2 stops6h 40m
United Airlines
Deal found 22/4C$ 993
Thu 9/76:00 a.m.
STL
-
YXU
2 stops7h 55m
United Airlines
Sun 12/79:30 a.m.
YXU
-
STL
2 stops12h 56m
United Airlines
Deal found 21/4C$ 1,086

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 24 April 2026.

Round-trip from

C$ 621

One-way from

C$ 438
WestJet
  • WestJet
  • 23/5-26/5
  • 2 total stops
  • 34h 35m total
  • Illinois to London
Search Deals
Air Canada
  • Air Canada
  • 21/6
  • 1 total stop
  • 6h 22m 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 24 April 2026.
Use the filters below to find and compare flights from Illinois to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sat 23/5

5:30 p.m.-5:20 a.m.

1 stop10h 50m

London

Tue 26/5

5:55 p.m.-4:40 p.m.

1 stop23h 45m

C$ 621

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 4/6

9:55 a.m.-2:58 p.m.

1 stop4h 03m

London

Thu 11/6

9:30 a.m.-2:55 p.m.

1 stop6h 25m

C$ 854

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 5/6

9:55 a.m.-2:58 p.m.

1 stop4h 03m

London

Mon 8/6

9:30 a.m.-2:55 p.m.

1 stop6h 25m

C$ 854
Quickest round-trip

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 25/5

3:50 p.m.-9:38 p.m.

1 stop4h 48m

London

Thu 28/5

5:10 a.m.-9:00 a.m.

1 stop4h 50m

C$ 854

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sat 23/5

3:50 p.m.-9:38 p.m.

1 stop4h 48m

London

Tue 26/5

12:20 p.m.-8:08 p.m.

2 stops8h 48m

C$ 866

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Mon 21/9

2:40 p.m.-9:40 p.m.

1 stop6h 00m

London

Mon 28/9

10:05 a.m.-2:00 p.m.

1 stop4h 55m

C$ 889

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Thu 4/6

2:15 p.m.-9:38 p.m.

1 stop6h 23m

London

Mon 8/6

3:30 p.m.-8:09 p.m.

1 stop5h 39m

C$ 934

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Fri 15/5

2:15 p.m.-9:38 p.m.

1 stop6h 23m

London

Tue 19/5

12:20 p.m.-8:25 p.m.

2 stops9h 05m

C$ 945

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Thu 9/7

6:00 a.m.-2:55 p.m.

2 stops7h 55m

London

Sun 12/7

9:30 a.m.-2:02 p.m.

1 stop5h 32m

C$ 1,064

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Thu 9/7

6:00 a.m.-2:55 p.m.

2 stops7h 55m

London

Sun 12/7

9:30 a.m.-9:26 p.m.

2 stops12h 56m

C$ 1,086

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/4

Showing 1-10 of 13 resultsSorted by cheapest first
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
No data available for this route at this time. Please check back soon.

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 and Air Canada fly from Illinois to London, Ontario in about 4h 03m. The time it takes to get you to your destination can typically vary by up to 6h 47m. 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.

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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Alternative routes for Illinois to London

See prices for flight routes from nearby airports that may be better suited for you.
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How does Cheapflights help users find flights from Illinois to London?

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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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