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Cheap flights from Illinois to London, ON from C$ 354

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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YXU
9 Sep — 16 Sep1
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 10 August 2026.

Sat 19/98:45 a.m. -
3 stops19h 35m
Sat 26/96:10 a.m. -
2 stops32h 11m
Deal found 5/8C$ 812
Tue 1/95:30 p.m. -
1 stop10h 50m
Sat 26/96:10 a.m. -
2 stops24h 28m
Deal found 6/8C$ 815
Thu 15/105:30 p.m. -
1 stop10h 50m
Mon 19/106:10 a.m. -
2 stops19h 23m
Deal found 6/8C$ 871
Thu 15/105:30 p.m. -
1 stop22h 15m
Mon 19/106:10 a.m. -
1 stop11h 30m
Deal found 6/8C$ 878
Mon 21/96:00 a.m. -
2 stops22h 20m
Mon 28/96:10 a.m. -
2 stops18h 06m
Deal found 9/8C$ 994
Mon 21/98:55 a.m. -
1 stop4h 55m
Mon 28/910:05 a.m. -
1 stop4h 55m
Deal found 7/8C$ 1,002
Sat 5/96:30 a.m. -
2 stops21h 50m
Fri 11/96:10 a.m. -
2 stops35h 22m
Deal found 6/8C$ 1,068
Sat 5/98:55 a.m. -
1 stop4h 55m
Fri 11/93:30 p.m. -
1 stop5h 50m
Deal found 6/8C$ 1,249
Tue 20/102:40 p.m. -
1 stop6h 00m
Sun 25/105:30 a.m. -
1 stop10h 56m
Deal found 6/8C$ 1,282
Wed 2/92:40 p.m. -
1 stop6h 00m
Sun 6/910:05 a.m. -
1 stop4h 57m
Deal found 6/8C$ 1,302

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 10 August 2026.

Round-trip from

C$ 812

One-way from

C$ 354
19/9-26/9
  • 19/9-26/9
  • 5 total stops
  • 51h 46m total
  • Illinois to London
Search Deals
WestJet
  • WestJet
  • 6/9
  • 1 total stop
  • 10h 50m 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 10 August 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 Chicago O'Hare Intl - YXU London

ORDYXU

Chicago O'Hare Intl

Tue 1/9

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

1 stop10h 50m

London

Sat 26/9

6:10 a.m.-5:38 a.m.

2 stops24h 28m

C$ 815

ChicagoLondon

ORD Chicago O'Hare Intl - YXU London

ORDYXU

Chicago O'Hare Intl

Sat 19/9

8:45 a.m.-5:20 a.m.

3 stops19h 35m

London

Sat 26/9

6:10 a.m.-9:00 a.m.

3 stops27h 50m

C$ 840

ChicagoLondon

ORD Chicago O'Hare Intl - YXU London

ORDYXU

Chicago O'Hare Intl

Sat 19/9

3:45 p.m.-9:40 p.m.

1 stop4h 55m

London

Sat 26/9

10:05 a.m.-2:55 p.m.

1 stop5h 50m

C$ 956
Quickest round-trip

ChicagoLondon

ORD Chicago O'Hare Intl - YXU London

ORDYXU

Chicago O'Hare Intl

Wed 7/10

3:45 p.m.-9:40 p.m.

1 stop4h 55m

London

Thu 8/10

3:30 p.m.-7:48 p.m.

1 stop5h 18m

C$ 977

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Mon 21/9

6:00 a.m.-5:20 a.m.

2 stops22h 20m

London

Mon 28/9

6:10 a.m.-11:16 p.m.

2 stops18h 06m

C$ 994

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Mon 21/9

12:10 p.m.-9:40 p.m.

2 stops8h 30m

London

Mon 28/9

3:30 p.m.-8:20 p.m.

1 stop5h 50m

C$ 1,008

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Sat 5/9

6:30 a.m.-5:20 a.m.

2 stops21h 50m

London

Fri 11/9

6:10 a.m.-4:32 p.m.

2 stops35h 22m

C$ 1,068

ChicagoLondon

ORD Chicago O'Hare Intl - YXU London

ORDYXU

Chicago O'Hare Intl

Wed 23/9

11:05 a.m.-9:40 p.m.

2 stops9h 35m

London

Sun 27/9

3:30 p.m.-7:48 p.m.

1 stop5h 18m

C$ 1,171

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Sat 5/9

12:10 p.m.-9:40 p.m.

2 stops8h 30m

London

Fri 11/9

3:30 p.m.-8:20 p.m.

1 stop5h 50m

C$ 1,261

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Tue 20/10

12:10 p.m.-9:40 p.m.

2 stops8h 30m

London

Sun 25/10

5:30 a.m.-3:26 p.m.

1 stop10h 56m

C$ 1,295

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/8

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

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 Air Canada and WestJet fly from Illinois to London, Ontario in about 4h 55m. The time it takes to get you to your destination can typically vary by up to 17h 25m. 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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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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