Find Deals on Flights from London to Ontario (LON - ONT)

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
Students
under 26
The price shown for each flight will be the average for all passengers including any infants.
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Book cheap flights from London to Ontario

(Round-trip)
Depart: Mon Mar 27 2017 Return: Thu Apr 27 2017 Trip spans 32 days
KLM
KLM
LHR
ONT
17h 16m
2 stops
ONT
LHR
16h 30m
2 stops
Depart: Tue Feb 21 2017 Return: Tue Feb 28 2017 Trip spans 8 days
British Airways
British Airways
LGW
ONT
31h 58m
2 stops
ONT
LGW
29h 15m
2 stops
Depart: Wed Mar 29 2017 Return: Tue Apr 11 2017 Trip spans 14 days
Virgin Atlantic
Virgin Atlantic
LHR
ONT
16h 50m
1 stop
ONT
LHR
12h 50m
1 stop
Depart: Sat Apr 1 2017 Return: Sat Apr 15 2017 Trip spans 15 days
Aeromexico
Aeromexico
LHR
ONT
32h 38m
2 stops
ONT
LHR
31h 22m
2 stops
Depart: Mon Dec 26 2016 Return: Thu Jan 5 2017 Trip spans 11 days
United
United
LHR
ONT
14h 13m
1 stop
ONT
LHR
19h 37m
1 stop
Depart: Mon Jun 12 2017 Return: Mon Jun 19 2017 Trip spans 8 days
$1137
Select
Delta
Delta
LGW
ONT
31h 30m
2 stops
ONT
LGW
19h 05m
2 stops
Depart: Mon Mar 6 2017 Return: Tue Mar 21 2017 Trip spans 15 days
British Airways
British Airways
LGW
ONT
58h 57m
2 stops
ONT
LGW
25h 53m
2 stops
Depart: Sat Apr 1 2017 Return: Sat Apr 29 2017 Trip spans 29 days
Aeromexico
Aeromexico
LHR
ONT
32h 38m
2 stops
ONT
LHR
31h 22m
2 stops
Depart: Mon Jan 23 2017 Return: Wed Feb 1 2017 Trip spans 10 days
British Airways
British Airways
LHR
ONT
20h 48m
2 stops
ONT
LHR
17h 41m
2 stops
Depart: Sat Dec 31 2016 Return: Mon Jan 9 2017 Trip spans 10 days
United
United
LHR
ONT
15h 13m
1 stop
ONT
LHR
12h 55m
1 stop
Depart: Mon Feb 6 2017 Return: Tue Feb 21 2017 Trip spans 16 days
British Airways
British Airways
LHR
ONT
20h 48m
2 stops
ONT
LHR
17h 41m
2 stops
Depart: Wed Feb 8 2017 Return: Tue Feb 21 2017 Trip spans 14 days
British Airways
British Airways
LHR
ONT
20h 48m
2 stops
ONT
LHR
17h 41m
2 stops
Depart: Fri Jan 13 2017 Return: Tue Jan 31 2017 Trip spans 19 days
British Airways
British Airways
LGW
ONT
45h 54m
2 stops
ONT
LGW
45h 11m
2 stops
Depart: Thu Jan 12 2017 Return: Sat Jan 21 2017 Trip spans 10 days
British Airways
British Airways
LGW
ONT
31h 58m
2 stops
ONT
LGW
27h 10m
2 stops
Depart: Fri Jan 13 2017 Return: Fri Jan 20 2017 Trip spans 8 days
British Airways
British Airways
LHR
ONT
20h 48m
2 stops
ONT
LHR
14h 46m
1 stop
Depart: Wed May 10 2017 Return: Wed May 24 2017 Trip spans 15 days
British Airways
British Airways
LHR
ONT
35h 37m
2 stops
ONT
LHR
15h 43m
1 stop
Depart: Wed May 10 2017 Return: Sun May 28 2017 Trip spans 19 days
British Airways
British Airways
LGW
ONT
33h 40m
2 stops
ONT
LGW
36h 55m
2 stops
Depart: Mon Jun 12 2017 Return: Mon Jun 19 2017 Trip spans 8 days
British Airways
British Airways
LHR
ONT
29h 07m
1 stop
ONT
LHR
15h 00m
1 stop
Depart: Sat Jun 3 2017 Return: Fri Jun 16 2017 Trip spans 14 days
$1059
Select
British Airways
British Airways
LHR
ONT
26h 42m
1 stop
ONT
LHR
15h 00m
1 stop
Depart: Tue Dec 27 2016 Return: Sun Jan 15 2017 Trip spans 20 days
$1116
Select
British Airways
British Airways
LGW
ONT
31h 59m
2 stops
ONT
LGW
24h 41m
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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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.

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Airports
Origin

London
only $639
only $789
Destination

Ontario
$639