Find Cheap 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
The price shown for each flight will be the average for all passengers including any infants.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from London to Ontario

(Round-trip)
Depart: Mon Jan 15 2018 Return: Mon Jan 22 2018 Trip spans 8 days
British Airways
British Airways
LHR
ONT
21h 20m
2 stops
ONT
LHR
19h 01m
1 stop
Depart: Mon Sep 11 2017 Return: Sun Sep 24 2017 Trip spans 14 days
$1016
Select
Virgin Atlantic
Virgin Atlantic
LHR
ONT
16h 47m
1 stop
ONT
LHR
18h 59m
1 stop
Depart: Wed Sep 27 2017 Return: Fri Oct 6 2017 Trip spans 10 days
$1355
Select
American Airlines
American Airlines
LGW
ONT
19h 20m
2 stops
ONT
LGW
16h 40m
2 stops
Depart: Wed Aug 2 2017 Return: Wed Aug 16 2017 Trip spans 15 days
$1905
Select
Delta
Delta
LHR
ONT
20h 31m
2 stops
ONT
LHR
16h 40m
2 stops
Depart: Wed Nov 15 2017 Return: Wed Nov 22 2017 Trip spans 8 days
British Airways
British Airways
LHR
ONT
24h 38m
2 stops
ONT
LHR
12h 53m
1 stop
Depart: Fri Dec 1 2017 Return: Tue Dec 12 2017 Trip spans 12 days
British Airways
British Airways
LHR
ONT
21h 20m
2 stops
ONT
LHR
14h 53m
1 stop
Depart: Fri Sep 15 2017 Return: Fri Sep 29 2017 Trip spans 15 days
$1099
Select
Virgin Atlantic
Virgin Atlantic
LHR
ONT
16h 47m
1 stop
ONT
LHR
18h 59m
1 stop
Depart: Mon Oct 30 2017 Return: Thu Nov 9 2017 Trip spans 11 days
$1002
Select
British Airways
British Airways
LHR
ONT
21h 00m
1 stop
ONT
LHR
17h 40m
1 stop
Depart: Wed Nov 1 2017 Return: Thu Nov 9 2017 Trip spans 9 days
$1002
Select
British Airways
British Airways
LHR
ONT
21h 00m
1 stop
ONT
LHR
17h 50m
1 stop
Depart: Sat Jan 20 2018 Return: Sat Jan 27 2018 Trip spans 8 days
$1004
Select
British Airways
British Airways
LHR
ONT
21h 20m
2 stops
ONT
LHR
17h 55m
1 stop
Depart: Sun Jul 23 2017 Return: Mon Aug 7 2017 Trip spans 16 days
$2062
Select
Virgin Atlantic
Virgin Atlantic
LHR
ONT
16h 41m
1 stop
ONT
LHR
19h 00m
1 stop
Depart: Tue Aug 29 2017 Return: Tue Sep 26 2017 Trip spans 29 days
$1476
Select
British Airways
British Airways
LHR
ONT
21h 35m
2 stops
ONT
LHR
15h 01m
1 stop
Depart: Sat Jul 22 2017 Return: Sat Aug 5 2017 Trip spans 15 days
$2101
Select
Virgin Atlantic
Virgin Atlantic
LHR
ONT
14h 53m
1 stop
ONT
LHR
16h 37m
1 stop
Depart: Fri Jul 28 2017 Return: Mon Jul 31 2017 Trip spans 4 days
$1899
Select
British Airways
British Airways
LHR
ONT
15h 51m
1 stop
ONT
LHR
14h 59m
1 stop
Depart: Thu Aug 3 2017 Return: Fri Aug 18 2017 Trip spans 16 days
$1983
Select
British Airways
British Airways
LHR
ONT
18h 16m
1 stop
ONT
LHR
17h 05m
1 stop
Depart: Sun Jul 23 2017 Return: Sat Jul 29 2017 Trip spans 7 days
$2163
Select
British Airways
British Airways
LGW
ONT
31h 45m
2 stops
ONT
LGW
25h 49m
2 stops
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

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.

We compile tonnes of data for you
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

London
only $942
only $1355
Destination

Ontario
$942