Find Cheap Flights from Ontario to London (ONT - LON)

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 London

(Round-trip)
Depart: Sat Oct 14 2017 Return: Tue Oct 31 2017 Trip spans 18 days
British Airways
British Airways
ONT
LHR
15h 00m
1 stop
LHR
ONT
23h 48m
2 stops
Depart: Mon Sep 11 2017 Return: Fri Sep 22 2017 Trip spans 12 days
American Airlines
American Airlines
ONT
LHR
13h 05m
1 stop
LHR
ONT
15h 00m
1 stop
Depart: Tue May 9 2017 Return: Wed May 24 2017 Trip spans 16 days
Air Canada
Air Canada
ONT
LHR
21h 30m
2 stops
LHR
ONT
26h 21m
2 stops
Depart: Sat Sep 23 2017 Return: Tue Oct 3 2017 Trip spans 11 days
British Airways
British Airways
ONT
LHR
15h 00m
1 stop
LHR
ONT
21h 53m
1 stop
Depart: Tue Oct 24 2017 Return: Wed Nov 1 2017 Trip spans 9 days
American Airlines
American Airlines
ONT
LHR
13h 05m
1 stop
LHR
ONT
14h 09m
1 stop
Depart: Sat Jun 17 2017 Return: Wed Jul 5 2017 Trip spans 19 days
$1108
Select
Virgin Atlantic
Virgin Atlantic
ONT
LHR
16h 20m
1 stop
LHR
ONT
14h 34m
1 stop
Depart: Tue Sep 12 2017 Return: Tue Sep 19 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
LGW
17h 40m
2 stops
LGW
ONT
19h 33m
2 stops
Depart: Fri Oct 27 2017 Return: Sat Nov 11 2017 Trip spans 16 days
British Airways
British Airways
ONT
LGW
46h 20m
2 stops
LGW
ONT
44h 18m
2 stops
Depart: Sun Sep 10 2017 Return: Sat Sep 23 2017 Trip spans 14 days
British Airways
British Airways
ONT
LGW
36h 55m
2 stops
LGW
ONT
35h 58m
2 stops
Depart: Thu Sep 21 2017 Return: Sat Oct 7 2017 Trip spans 17 days
British Airways
British Airways
ONT
LHR
14h 28m
1 stop
LHR
ONT
15h 53m
1 stop
Depart: Wed Sep 27 2017 Return: Thu Oct 12 2017 Trip spans 16 days
British Airways
British Airways
ONT
LHR
14h 28m
1 stop
LHR
ONT
15h 55m
1 stop
Depart: Mon May 8 2017 Return: Sun May 28 2017 Trip spans 21 days
$1112
Select
Virgin Atlantic
Virgin Atlantic
ONT
LHR
12h 34m
1 stop
LHR
ONT
14h 56m
1 stop
Depart: Sat Sep 30 2017 Return: Sun Oct 22 2017 Trip spans 23 days
British Airways
British Airways
ONT
LHR
14h 28m
1 stop
LHR
ONT
15h 53m
1 stop
Depart: Tue Jul 11 2017 Return: Wed Jul 26 2017 Trip spans 16 days
$1140
Select
Virgin Atlantic
Virgin Atlantic
ONT
LHR
19h 00m
1 stop
LHR
ONT
16h 14m
1 stop
Depart: Thu Jun 22 2017 Return: Sat Jul 8 2017 Trip spans 17 days
$1044
Select
American Airlines
American Airlines
ONT
LGW
17h 20m
2 stops
LGW
ONT
19h 31m
2 stops
Depart: Sat Oct 14 2017 Return: Mon Oct 23 2017 Trip spans 10 days
British Airways
British Airways
ONT
LHR
14h 28m
1 stop
LHR
ONT
15h 55m
1 stop
Depart: Thu Oct 19 2017 Return: Thu Oct 26 2017 Trip spans 8 days
British Airways
British Airways
ONT
LHR
14h 28m
1 stop
LHR
ONT
15h 53m
1 stop
Depart: Tue Aug 8 2017 Return: Tue Aug 22 2017 Trip spans 15 days
British Airways
British Airways
ONT
LHR
14h 59m
1 stop
LHR
ONT
19h 20m
2 stops
Depart: Tue Aug 8 2017 Return: Sat Aug 26 2017 Trip spans 19 days
British Airways
British Airways
ONT
LGW
30h 00m
2 stops
LGW
ONT
35h 58m
2 stops
Depart: Sun Aug 27 2017 Return: Tue Sep 5 2017 Trip spans 10 days
British Airways
British Airways
ONT
LHR
20h 20m
1 stop
LHR
ONT
31h 50m
2 stops
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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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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.

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Airports
Origin

Ontario
$502
Destination

London
only $502
only $630