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

Book cheap flights from Ontario to London

(Round-trip)
Depart: Fri Mar 4 2016 Return: Sun Mar 6 2016 Trip spans 3 days
United
United
ONT
LHR
14h 41m
1 stop
LHR
ONT
17h 51m
2 stops
Depart: Tue Mar 29 2016 Return: Sun Apr 3 2016 Trip spans 6 days
Delta
Delta
ONT
LGW
15h 25m
2 stops
LGW
ONT
20h 14m
2 stops
Depart: Mon May 9 2016 Return: Mon May 30 2016 Trip spans 22 days
American Airlines
American Airlines
ONT
LGW
17h 07m
2 stops
LGW
ONT
19h 28m
2 stops
Depart: Fri Feb 12 2016 Return: Sun Feb 14 2016 Trip spans 3 days
American Airlines
American Airlines
ONT
LHR
16h 50m
2 stops
LHR
ONT
25h 12m
2 stops
Depart: Fri Mar 25 2016 Return: Sun Apr 3 2016 Trip spans 10 days
Delta
Delta
ONT
LHR
18h 30m
2 stops
LHR
ONT
20h 09m
2 stops
Depart: Mon Feb 22 2016 Return: Mon Feb 29 2016 Trip spans 8 days
British Airways
British Airways
ONT
LHR
17h 35m
1 stop
LHR
ONT
20h 52m
1 stop
Depart: Wed Jun 22 2016 Return: Thu Jun 30 2016 Trip spans 9 days
$1214
Select
Air Canada
Air Canada
ONT
LHR
17h 10m
2 stops
LHR
ONT
21h 54m
2 stops
Depart: Sat Aug 27 2016 Return: Thu Sep 8 2016 Trip spans 13 days
$1863
Select
Air Canada
Air Canada
ONT
LGW
20h 15m
2 stops
LGW
ONT
16h 00m
2 stops
Depart: Fri Jul 22 2016 Return: Sun Jul 31 2016 Trip spans 10 days
$1996
Select
British Airways
British Airways
ONT
LGW
25h 18m
2 stops
LGW
ONT
28h 15m
2 stops
Depart: Thu Mar 17 2016 Return: Mon Mar 28 2016 Trip spans 12 days
$15727
Select
Emirates
Emirates
ONT
LGW
36h 40m
2 stops
LGW
ONT
34h 20m
2 stops
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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We’re not the seller
At KAYAK we don’t set 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
$879
Destination

London
only $879
only $885