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Cheap flights from Illinois to London from $309

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 8/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Illinois to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
8:45 am - 8:32 pm
ORD
-
YXU
10h 47m
2 stops
Air Canada Logo
10:05 am - 8:05 pm
YXU
-
ORD
11h 00m
2 stops
$616Air Canada
Thu, Jul 9 - Wed, Jul 15
Air Canada Logo
8:45 am - 8:32 pm
ORD
-
YXU
10h 47m
2 stops
Air Canada Logo
10:05 am - 2:55 pm
YXU
-
ORD
5h 50m
1 stop
$621Air Canada
Thu, Jul 9 - Wed, Jul 15
Multiple Airlines Logo
5:30 pm - 5:20 am
ORD
-
YXU
10h 50m
1 stop
Multiple Airlines Logo
10:05 am - 8:05 pm
YXU
-
ORD
11h 00m
2 stops
$637Multiple Airlines
Thu, Jul 23 - Wed, Jul 29
Multiple Airlines Logo
5:30 pm - 5:20 am
ORD
-
YXU
10h 50m
1 stop
Multiple Airlines Logo
10:05 am - 2:55 pm
YXU
-
ORD
5h 50m
1 stop
$640Multiple Airlines
Thu, Jul 23 - Wed, Jul 29
WestJet Logo
5:30 pm - 5:20 am
ORD
-
YXU
10h 50m
1 stop
WestJet Logo
6:10 am - 4:40 pm
YXU
-
ORD
11h 30m
1 stop
$645WestJet
Wed, Aug 5 - Wed, Aug 12
Air Canada Logo
8:45 am - 5:42 pm
ORD
-
YXU
7h 57m
2 stops
Air Canada Logo
10:05 am - 8:05 pm
YXU
-
ORD
11h 00m
2 stops
$654Air Canada
Thu, Jul 23 - Wed, Jul 29
Multiple Airlines Logo
5:30 pm - 5:20 am
ORD
-
YXU
10h 50m
1 stop
Multiple Airlines Logo
8:40 pm - 12:33 am
YXU
-
ORD
52h 53m
2 stops
$666Multiple Airlines
Thu, Aug 6 - Thu, Aug 13
WestJet Logo
5:30 pm - 5:20 am
ORD
-
YXU
10h 50m
1 stop
WestJet Logo
8:40 pm - 4:40 pm
YXU
-
ORD
21h 00m
1 stop
$679WestJet
Thu, Aug 6 - Thu, Aug 13
Air Canada Logo
2:15 pm - 9:40 pm
ORD
-
YXU
6h 25m
1 stop
Air Canada Logo
3:30 pm - 7:48 pm
YXU
-
ORD
5h 18m
1 stop
$685Air Canada
Sat, Sep 19 - Tue, Sep 22
Multiple Airlines Logo
5:35 pm - 5:20 am
ORD
-
YXU
34h 45m
3 stops
Multiple Airlines Logo
10:05 am - 2:55 pm
YXU
-
ORD
5h 50m
1 stop
$693Multiple Airlines
Fri, Jul 24 - Fri, Jul 31

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WestJet flights from Illinois to London, Ontario

Our best WestJet deals on Illinois to London, Ontario flight tickets
WestJet
Aug 5
ORD5:30 pmChicago O'Hare Intl
10h 50m
1 stop
YXU5:20 amLondon
Aug 12
YXU6:10 amLondon
11h 30m
1 stop
ORD4:40 pmChicago O'Hare Intl
$645
WestJet
Aug 6
ORD5:30 pmChicago O'Hare Intl
10h 50m
1 stop
YXU5:20 amLondon
Aug 13
YXU8:40 pmLondon
21h 00m
1 stop
ORD4:40 pmChicago O'Hare Intl
$679
WestJet
Sep 13
ORD5:30 pmChicago O'Hare Intl
10h 50m
1 stop
YXU5:20 amLondon
Sep 15
YXU6:10 amLondon
11h 30m
1 stop
ORD4:40 pmChicago O'Hare Intl
$749

United Airlines flights from Illinois to London, Ontario

Our best United Airlines deals on Illinois to London, Ontario flight tickets
United Airlines
Aug 5
ORD10:43 amChicago O'Hare Intl
5h 59m
1 stop
YXU5:42 pmLondon
Aug 12
YXU5:40 amLondon
5h 13m
1 stop
ORD9:53 amChicago O'Hare Intl
$816
United Airlines
Aug 5
ORD11:07 amChicago O'Hare Intl
9h 33m
2 stops
YXU9:40 pmLondon
Aug 12
YXU6:20 pmLondon
4h 45m
1 stop
ORD10:05 pmChicago O'Hare Intl
$826
United Airlines
Jul 29
ORD6:30 amChicago O'Hare Intl
10h 12m
2 stops
YXU5:42 pmLondon
Jul 31
YXU3:30 pmLondon
9h 01m
2 stops
ORD11:31 pmChicago O'Hare Intl
$842

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 832,500 searches. Data last updated June 25, 2026.
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

Cheapest round-trip

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 7/9

8:45 am-8:32 pm

2 stops10h 47m

London

Wed 7/15

10:05 am-8:05 pm

2 stops11h 00m

$616

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 7/9

8:45 am-8:32 pm

2 stops10h 47m

London

Wed 7/15

10:05 am-2:55 pm

1 stop5h 50m

$621

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 7/23

5:30 pm-5:20 am

1 stop10h 50m

London

Wed 7/29

10:05 am-8:05 pm

2 stops11h 00m

$637

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 7/23

5:30 pm-5:20 am

1 stop10h 50m

London

Wed 7/29

10:05 am-2:55 pm

1 stop5h 50m

$640

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Wed 8/5

5:30 pm-5:20 am

1 stop10h 50m

London

Wed 8/12

6:10 am-4:40 pm

1 stop11h 30m

$645

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 7/23

8:45 am-5:42 pm

2 stops7h 57m

London

Wed 7/29

10:05 am-8:05 pm

2 stops11h 00m

$654

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 8/6

5:30 pm-5:20 am

1 stop10h 50m

London

Thu 8/13

8:40 pm-12:33 am

2 stops52h 53m

$666

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 8/6

5:30 pm-5:20 am

1 stop10h 50m

London

Thu 8/13

8:40 pm-4:40 pm

1 stop21h 00m

$679
Quickest round-trip

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sat 9/19

2:15 pm-9:40 pm

1 stop6h 25m

London

Tue 9/22

3:30 pm-7:48 pm

1 stop5h 18m

$685

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 7/24

5:35 pm-5:20 am

3 stops34h 45m

London

Fri 7/31

10:05 am-2:55 pm

1 stop5h 50m

$693

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 51% 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

Fastest flight time

4h 02m

Direct flights

None
The fastest flight from Illinois to London, Ontario takes 4h 02m
There are no direct flights from Illinois to London, Ontario. There are no popular flight routes from Illinois to London, Ontario.
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Frequently asked questions about flying from Illinois to London, Ontario

  • When did momondo last update prices for flights from Illinois to London Airport?

    Prices for flights from Illinois to London Airport refresh daily.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify 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 travel and health documents you'll need for your trip to London Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Traveling 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?

It is quick and easy to find Illinois to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

All flight searches from Illinois to London on momondo can be filtered to show those which offer flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to London from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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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