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: Tue Dec 12 2017 Return: Tue Jan 30 2018 Trip spans 50 days
United
United
ONT
LHR
13h 37m
1 stop
LHR
ONT
20h 22m
2 stops
Depart: Sat Dec 2 2017 Return: Wed Dec 13 2017 Trip spans 12 days
British Airways
British Airways
ONT
LHR
18h 15m
1 stop
LHR
ONT
16h 05m
1 stop
Depart: Fri Mar 9 2018 Return: Fri Mar 16 2018 Trip spans 7 days
American Airlines
American Airlines
ONT
LHR
13h 05m
1 stop
LHR
ONT
14h 04m
1 stop
Depart: Fri Mar 9 2018 Return: Fri Mar 16 2018 Trip spans 7 days
Multiple Airlines
Multiple Airlines
ONT
LHR
16h 50m
1 stop
LHR
ONT
34h 53m
1 stop
Depart: Sat Nov 11 2017 Return: Sat Nov 18 2017 Trip spans 8 days
KLM
KLM
ONT
LHR
21h 10m
2 stops
LHR
ONT
16h 13m
2 stops
Depart: Wed Nov 8 2017 Return: Sun Nov 19 2017 Trip spans 12 days
Delta
Delta
ONT
LHR
17h 30m
2 stops
LHR
ONT
19h 27m
2 stops
Depart: Thu Jan 11 2018 Return: Tue Jan 30 2018 Trip spans 20 days
United
United
ONT
LHR
13h 00m
1 stop
LHR
ONT
20h 22m
2 stops
Depart: Sun Dec 3 2017 Return: Wed Dec 13 2017 Trip spans 11 days
British Airways
British Airways
ONT
LHR
14h 45m
1 stop
LHR
ONT
17h 54m
1 stop
Depart: Fri Nov 10 2017 Return: Fri Nov 17 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
LHR
14h 45m
1 stop
LHR
ONT
15h 54m
1 stop
Depart: Mon Dec 4 2017 Return: Wed Dec 13 2017 Trip spans 10 days
British Airways
British Airways
ONT
LHR
22h 55m
1 stop
LHR
ONT
17h 54m
1 stop
Depart: Tue Dec 12 2017 Return: Wed Jan 31 2018 Trip spans 51 days
United
United
ONT
LHR
13h 37m
1 stop
LHR
ONT
14h 37m
1 stop
Depart: Thu Nov 16 2017 Return: Mon Nov 27 2017 Trip spans 12 days
American Airlines
American Airlines
ONT
LHR
19h 40m
1 stop
LHR
ONT
15h 20m
1 stop
Depart: Tue Dec 5 2017 Return: Wed Dec 13 2017 Trip spans 9 days
British Airways
British Airways
ONT
LHR
22h 55m
1 stop
LHR
ONT
17h 54m
1 stop
Depart: Wed Dec 13 2017 Return: Wed Dec 27 2017 Trip spans 15 days
United
United
ONT
LHR
13h 37m
1 stop
LHR
ONT
14h 43m
1 stop
Depart: Wed Nov 22 2017 Return: Thu Dec 7 2017 Trip spans 16 days
American Airlines
American Airlines
ONT
LHR
23h 15m
1 stop
LHR
ONT
17h 54m
1 stop
Depart: Wed Dec 6 2017 Return: Wed Dec 13 2017 Trip spans 8 days
British Airways
British Airways
ONT
LHR
20h 55m
1 stop
LHR
ONT
16h 05m
1 stop
Depart: Wed Dec 13 2017 Return: Sun Dec 24 2017 Trip spans 12 days
United
United
ONT
LHR
13h 15m
1 stop
LHR
ONT
32h 36m
2 stops
Depart: Sat Dec 9 2017 Return: Wed Jan 10 2018 Trip spans 33 days
British Airways
British Airways
ONT
LHR
14h 35m
1 stop
LHR
ONT
15h 30m
1 stop
Depart: Sun Dec 10 2017 Return: Wed Jan 10 2018 Trip spans 32 days
British Airways
British Airways
ONT
LHR
20h 55m
1 stop
LHR
ONT
15h 30m
1 stop
Depart: Mon Dec 11 2017 Return: Wed Jan 10 2018 Trip spans 31 days
British Airways
British Airways
ONT
LHR
20h 55m
1 stop
LHR
ONT
20h 58m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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
$632
Destination

London
$632