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: Fri Sep 15 2017 Return: Fri Sep 29 2017 Trip spans 15 days
Multiple Airlines
Multiple Airlines
ONT
LHR
16h 50m
1 stop
LHR
ONT
16h 47m
1 stop
Depart: Mon Oct 2 2017 Return: Mon Oct 9 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
LHR
13h 10m
1 stop
LHR
ONT
14h 59m
1 stop
Depart: Wed Sep 20 2017 Return: Wed Sep 27 2017 Trip spans 8 days
British Airways
British Airways
ONT
LHR
15h 01m
1 stop
LHR
ONT
15h 55m
1 stop
Depart: Sun Dec 3 2017 Return: Mon Dec 11 2017 Trip spans 9 days
KLM
KLM
ONT
LHR
16h 25m
2 stops
LHR
ONT
17h 58m
2 stops
Depart: Sun Oct 1 2017 Return: Thu Oct 12 2017 Trip spans 12 days
Delta
Delta
ONT
LHR
19h 00m
1 stop
LHR
ONT
20h 09m
2 stops
Depart: Wed Aug 16 2017 Return: Sat Aug 26 2017 Trip spans 11 days
Virgin Atlantic
Virgin Atlantic
ONT
LHR
18h 55m
1 stop
LHR
ONT
14h 37m
1 stop
Depart: Wed Oct 4 2017 Return: Mon Oct 9 2017 Trip spans 6 days
United
United
ONT
LHR
13h 55m
1 stop
LHR
ONT
13h 55m
1 stop
Depart: Thu Nov 16 2017 Return: Sun Nov 26 2017 Trip spans 11 days
American Airlines
American Airlines
ONT
LHR
13h 00m
1 stop
LHR
ONT
17h 24m
1 stop
Depart: Sat Oct 21 2017 Return: Thu Nov 2 2017 Trip spans 13 days
British Airways
British Airways
ONT
LGW
49h 11m
2 stops
LGW
ONT
44h 42m
2 stops
Depart: Thu Aug 17 2017 Return: Thu Aug 31 2017 Trip spans 15 days
Multiple Airlines
Multiple Airlines
ONT
LHR
14h 55m
1 stop
LHR
ONT
15h 05m
1 stop
Depart: Wed Aug 9 2017 Return: Sat Sep 30 2017 Trip spans 53 days
American Airlines
American Airlines
ONT
LHR
14h 46m
1 stop
LHR
ONT
16h 00m
1 stop
Depart: Mon Sep 11 2017 Return: Tue Sep 19 2017 Trip spans 9 days
British Airways
British Airways
ONT
LGW
26h 00m
2 stops
LGW
ONT
34h 20m
2 stops
Depart: Thu Dec 7 2017 Return: Sat Dec 16 2017 Trip spans 10 days
American Airlines
American Airlines
ONT
LHR
13h 00m
1 stop
LHR
ONT
15h 09m
1 stop
Depart: Mon Dec 11 2017 Return: Mon Dec 18 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
LHR
14h 55m
1 stop
LHR
ONT
17h 24m
1 stop
Depart: Sun Jul 23 2017 Return: Tue Sep 12 2017 Trip spans 52 days
Virgin Atlantic
Virgin Atlantic
ONT
LHR
19h 00m
1 stop
LHR
ONT
16h 19m
1 stop
Depart: Sat Nov 25 2017 Return: Sun Dec 3 2017 Trip spans 9 days
British Airways
British Airways
ONT
LHR
14h 53m
1 stop
LHR
ONT
15h 20m
1 stop
Depart: Wed Aug 9 2017 Return: Wed Aug 23 2017 Trip spans 15 days
American Airlines
American Airlines
ONT
LHR
20h 15m
1 stop
LHR
ONT
15h 12m
1 stop
Depart: Tue Nov 7 2017 Return: Sat Nov 18 2017 Trip spans 12 days
British Airways
British Airways
ONT
LHR
12h 43m
1 stop
LHR
ONT
15h 15m
1 stop
Depart: Thu Dec 21 2017 Return: Mon Jan 8 2018 Trip spans 19 days
American Airlines
American Airlines
ONT
LHR
13h 00m
1 stop
LHR
ONT
15h 09m
1 stop
Depart: Thu Nov 16 2017 Return: Tue Nov 28 2017 Trip spans 13 days
British Airways
British Airways
ONT
LHR
12h 43m
1 stop
LHR
ONT
15h 45m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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

Ontario
$587
Destination

London
only $587
only $626