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Cheap flights from Illinois to London from C$ 180

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to London departing on 22/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Illinois to London

Cheap round-trip flights

WestJet Logo
5:30 p.m. - 5:12 a.m.ORD-YXU
10h 42m1 stop
WestJet Logo
8:00 p.m. - 4:43 p.m.YXU-ORD
21h 43m1 stop
C$ 388WestJet
Find Deal
Mon, 22 Sep - Mon, 29 Sep
Logo
6:00 a.m. - 5:12 a.m.ORD-YXU
22h 12m2 stops
Logo
8:00 p.m. - 4:43 p.m.YXU-ORD
21h 43m1 stop
C$ 493
Find Deal
Mon, 22 Sep - Mon, 29 Sep
Logo
5:30 p.m. - 5:12 a.m.ORD-YXU
10h 42m1 stop
Logo
8:00 p.m. - 11:59 p.m.YXU-ORD
28h 59m2 stops
C$ 506
Find Deal
Sun, 14 Sep - Sun, 21 Sep
Logo
5:30 p.m. - 5:12 a.m.ORD-YXU
10h 42m1 stop
Logo
8:00 p.m. - 7:52 p.m.YXU-ORD
24h 52m2 stops
C$ 508
Find Deal
Tue, 30 Sep - Tue, 7 Oct
WestJet Logo
5:30 p.m. - 5:12 a.m.ORD-YXU
10h 42m1 stop
WestJet Logo
6:00 a.m. - 4:43 p.m.YXU-ORD
11h 43m1 stop
C$ 572WestJet
Find Deal
Sun, 14 Sep - Sun, 21 Sep
Logo
5:30 p.m. - 5:12 a.m.ORD-YXU
10h 42m1 stop
Logo
8:00 p.m. - 2:27 p.m.YXU-ORD
43h 27m3 stops
C$ 607
Find Deal
Tue, 30 Sep - Tue, 7 Oct
Air Canada Logo
3:50 p.m. - 9:29 p.m.ORD-YXU
4h 39m1 stop
Air Canada Logo
9:55 a.m. - 3:04 p.m.YXU-ORD
6h 09m1 stop
C$ 815Air Canada
Find Deal
Tue, 30 Sep - Tue, 7 Oct
Air Canada Logo
2:00 p.m. - 9:29 p.m.ORD-YXU
6h 29m1 stop
Air Canada Logo
10:00 a.m. - 1:14 p.m.YXU-ORD
4h 14m1 stop
C$ 855Air Canada
Find Deal
Sat, 13 Sep - Sat, 20 Sep
United Airlines Logo
6:00 a.m. - 3:17 p.m.ORD-YXU
8h 17m2 stops
United Airlines Logo
3:50 p.m. - 11:30 p.m.YXU-ORD
8h 40m2 stops
C$ 982United Airlines
Find Deal
Mon, 22 Sep - Mon, 29 Sep
United Airlines Logo
1:24 p.m. - 9:21 p.m.ORD-YXU
6h 57m2 stops
United Airlines Logo
5:45 a.m. - 9:13 a.m.YXU-ORD
4h 28m1 stop
C$ 1,002United Airlines
Find Deal
Fri, 26 Dec - Sat, 3 Jan

Air Canada flights from Illinois to London, Ontario

Our best Air Canada deals on Illinois to London, Ontario flight tickets
Air Canada
30 Sep
ORD3:50 p.m.Chicago O'Hare Intl
4h 39m
1 stop
YXU9:29 p.m.London
7 Oct
YXU9:55 a.m.London
6h 09m
1 stop
ORD3:04 p.m.Chicago O'Hare Intl
C$ 815
Find similar
Air Canada
13 Sep
ORD2:00 p.m.Chicago O'Hare Intl
6h 29m
1 stop
YXU9:29 p.m.London
20 Sep
YXU10:00 a.m.London
4h 14m
1 stop
ORD1:14 p.m.Chicago O'Hare Intl
C$ 855
Find similar
Air Canada
13 Sep
ORD9:55 a.m.Chicago O'Hare Intl
4h 22m
1 stop
YXU3:17 p.m.London
20 Sep
YXU6:10 a.m.London
9h 45m
2 stops
ORD2:55 p.m.Chicago O'Hare Intl
C$ 862
Find similar

United Airlines flights from Illinois to London, Ontario

Our best United Airlines deals on Illinois to London, Ontario flight tickets
United Airlines
22 Sep
ORD6:00 a.m.Chicago O'Hare Intl
8h 17m
2 stops
YXU3:17 p.m.London
29 Sep
YXU3:50 p.m.London
8h 40m
2 stops
ORD11:30 p.m.Chicago O'Hare Intl
C$ 982
Find similar
United Airlines
26 Dec
ORD1:24 p.m.Chicago O'Hare Intl
6h 57m
2 stops
YXU9:21 p.m.London
3 Jan
YXU5:45 a.m.London
4h 28m
1 stop
ORD9:13 a.m.Chicago O'Hare Intl
C$ 1,002
Find similar
United Airlines
1 Oct
STL12:25 p.m.Lambert-St Louis
25h 37m
2 stops
YXU3:02 p.m.London
8 Oct
YXU6:15 a.m.London
18h 43m
2 stops
STL11:58 p.m.Lambert-St Louis
C$ 1,111
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momondo Fare Finder

 
Customize your flight search to find flights from Illinois to London, Ontario 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, momondo users made 96,600 searches. Data last updated 18 August 2025.
Use the filters below to find and compare flights from Illinois to London, Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 22/9

5:30 p.m.-5:12 a.m.

1 stop10h 42m

London

Mon 29/9

8:00 p.m.-4:43 p.m.

1 stop21h 43m

C$ 388

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 22/9

6:00 a.m.-5:12 a.m.

2 stops22h 12m

London

Mon 29/9

8:00 p.m.-4:43 p.m.

1 stop21h 43m

C$ 493

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sun 14/9

5:30 p.m.-5:12 a.m.

1 stop10h 42m

London

Sun 21/9

8:00 p.m.-11:59 p.m.

2 stops28h 59m

C$ 506

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Tue 30/9

5:30 p.m.-5:12 a.m.

1 stop10h 42m

London

Tue 7/10

8:00 p.m.-7:52 p.m.

2 stops24h 52m

C$ 508

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sun 14/9

5:30 p.m.-5:12 a.m.

1 stop10h 42m

London

Sun 21/9

6:00 a.m.-4:43 p.m.

1 stop11h 43m

C$ 572

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Tue 30/9

5:30 p.m.-5:12 a.m.

1 stop10h 42m

London

Tue 7/10

8:00 p.m.-2:27 p.m.

3 stops43h 27m

C$ 607

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Tue 30/9

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

1 stop4h 39m

London

Tue 7/10

9:55 a.m.-3:04 p.m.

1 stop6h 09m

C$ 815

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sat 13/9

2:00 p.m.-9:29 p.m.

1 stop6h 29m

London

Sat 20/9

10:00 a.m.-1:14 p.m.

1 stop4h 14m

C$ 855

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 22/9

6:00 a.m.-3:17 p.m.

2 stops8h 17m

London

Mon 29/9

3:50 p.m.-11:30 p.m.

2 stops8h 40m

C$ 982

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 26/12

1:24 p.m.-9:21 p.m.

2 stops6h 57m

London

Sat 3/1

5:45 a.m.-9:13 a.m.

1 stop4h 28m

C$ 1,002

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Illinois to London, Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on Illinois to London, Ontario flights?

You could potentially save up to 68% on your flight if you consider stops on a Illinois to London, Ontario flight.

Cheap Illinois to London, Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to London, Ontario

Best price found

C$ 180

Fastest flight time

4h 22m

Direct flights

None

Airports in London, Ontario

1 airport
The best one-way flight to London, Ontario from Illinois in the past 72 hours is C$ 180. The best round-trip flight deal from Illinois to London, Ontario found on momondo in the last 72 hours is C$ 388.
The fastest flight from Illinois to London, Ontario takes 4h 22m
There are no direct flights from Illinois to London, Ontario. Popular non-direct routes for this connection are Chicago O'Hare Intl Airport - London Airport and Lambert-St Louis Airport - London Airport.
There is 1 airport near London, Ontario: London (YXU)
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  • When did momondo last update prices for flights from Illinois to London Airport?

    Prices for flights from Illinois to London Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Illinois to London Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to London Airport.

  • What documentation or ID do you need to fly to London Airport?

    The required travel and health documents for your London Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Travelling to a place near London?

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

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to London?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to London. momondo saves you time and could save you money on your trip.

Can I find flights from Illinois to London with flexible booking policies on momondo?

Flights from Illinois to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Illinois to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Illinois to London.

I’m not ready to book a flight from Illinois to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Illinois are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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