Find Cheap Flights from Ontario to United Kingdom

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
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Book cheap flights from Ontario to United Kingdom

(Round-trip)
Depart: Fri Sep 22 2017 Return: Thu Oct 12 2017 Trip spans 21 days
British Airways
British Airways
ONT
LHR
24h 00m
1 stop
LHR
ONT
35h 43m
2 stops
Depart: Sun Sep 10 2017 Return: Thu Sep 21 2017 Trip spans 12 days
American Airlines
American Airlines
ONT
LGW
22h 45m
2 stops
LGW
ONT
21h 45m
2 stops
Depart: Thu Nov 16 2017 Return: Thu Nov 23 2017 Trip spans 8 days
United
United
ONT
LHR
25h 05m
1 stop
LHR
ONT
18h 23m
2 stops
Depart: Tue Nov 14 2017 Return: Tue Dec 12 2017 Trip spans 29 days
Air France
Air France
ONT
BHX
26h 50m
2 stops
BHX
ONT
17h 53m
2 stops
Depart: Fri Nov 10 2017 Return: Sun Nov 12 2017 Trip spans 3 days
British Airways
British Airways
ONT
LHR
18h 28m
1 stop
LHR
ONT
21h 20m
2 stops
Depart: Wed Nov 15 2017 Return: Sun Jan 14 2018 Trip spans 61 days
British Airways
British Airways
ONT
LHR
14h 55m
1 stop
LHR
ONT
24h 38m
2 stops
Depart: Sun Aug 20 2017 Return: Sun Sep 3 2017 Trip spans 15 days
American Airlines
American Airlines
ONT
LHR
16h 41m
1 stop
LHR
ONT
18h 20m
1 stop
Depart: Mon Aug 28 2017 Return: Mon Sep 4 2017 Trip spans 8 days
$1430
Select
Air Canada
Air Canada
ONT
LGW
20h 50m
2 stops
LGW
ONT
50h 34m
2 stops
Depart: Sat Dec 23 2017 Return: Thu Jan 18 2018 Trip spans 27 days
British Airways
British Airways
ONT
LHR
19h 30m
1 stop
LHR
ONT
24h 38m
2 stops
Depart: Fri Sep 29 2017 Return: Thu Oct 12 2017 Trip spans 14 days
United
United
ONT
EDI
15h 55m
2 stops
EDI
ONT
20h 56m
2 stops
Depart: Sun Aug 6 2017 Return: Wed Aug 16 2017 Trip spans 11 days
$1580
Select
KLM
KLM
ONT
GLA
18h 20m
2 stops
GLA
ONT
17h 41m
2 stops
Depart: Sat Oct 7 2017 Return: Sun Oct 15 2017 Trip spans 9 days
British Airways
British Airways
ONT
LHR
14h 55m
1 stop
LHR
ONT
18h 45m
1 stop
Depart: Sun Sep 10 2017 Return: Sat Sep 23 2017 Trip spans 14 days
Air France
Air France
ONT
SOU
23h 39m
2 stops
SOU
ONT
22h 57m
2 stops
Depart: Tue Jan 9 2018 Return: Tue Jan 16 2018 Trip spans 8 days
British Airways
British Airways
ONT
LHR
12h 53m
1 stop
LHR
ONT
15h 25m
1 stop
Depart: Mon Jul 31 2017 Return: Sun Aug 13 2017 Trip spans 14 days
$1937
Select
Aeromexico
Aeromexico
ONT
LHR
31h 38m
2 stops
LHR
ONT
32h 27m
2 stops
Depart: Sun Jan 21 2018 Return: Wed Jan 31 2018 Trip spans 11 days
British Airways
British Airways
ONT
LHR
12h 53m
1 stop
LHR
ONT
15h 25m
1 stop
Depart: Thu Sep 14 2017 Return: Wed Sep 20 2017 Trip spans 7 days
American Airlines
American Airlines
ONT
LHR
13h 10m
1 stop
LHR
ONT
15h 12m
1 stop
Depart: Mon Oct 2 2017 Return: Wed Oct 18 2017 Trip spans 17 days
$1023
Select
United
United
ONT
MAN
17h 55m
2 stops
MAN
ONT
18h 39m
2 stops
Depart: Sat Sep 23 2017 Return: Sun Oct 8 2017 Trip spans 16 days
American Airlines
American Airlines
ONT
LGW
17h 15m
2 stops
LGW
ONT
19h 50m
2 stops
Depart: Sat Dec 30 2017 Return: Thu Jan 11 2018 Trip spans 13 days
British Airways
British Airways
ONT
LHR
14h 53m
1 stop
LHR
ONT
24h 38m
2 stops
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an email and someone from our team will get back to you promptly.

Airports
Origin

Ontario
$583
Destination

Southampton
$884
London
only $583
only $590
Manchester
$1023
Glasgow
$1580
Edinburgh
$769
Birmingham
$811