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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Book cheap flights from Ontario to London

(Round-trip)
Depart: Tue Mar 28 2017 Return: Tue Apr 11 2017 Trip spans 15 days
British Airways
British Airways
ONT
LHR
18h 50m
1 stop
LHR
ONT
19h 52m
2 stops
Depart: Sun Apr 2 2017 Return: Tue Apr 18 2017 Trip spans 17 days
Delta
Delta
ONT
LHR
12h 33m
1 stop
LHR
ONT
16h 24m
1 stop
Depart: Fri Apr 28 2017 Return: Tue May 16 2017 Trip spans 19 days
American Airlines
American Airlines
ONT
LGW
22h 35m
2 stops
LGW
ONT
29h 36m
2 stops
Depart: Wed Jul 19 2017 Return: Thu Aug 31 2017 Trip spans 44 days
United
United
ONT
LHR
14h 00m
1 stop
LHR
ONT
14h 58m
1 stop
Depart: Sun Jun 4 2017 Return: Tue Jun 13 2017 Trip spans 10 days
KLM
KLM
ONT
LHR
22h 00m
2 stops
LHR
ONT
23h 46m
2 stops
Depart: Sun Jun 11 2017 Return: Thu Jun 22 2017 Trip spans 12 days
Finnair
Finnair
ONT
LHR
16h 50m
1 stop
LHR
ONT
16h 48m
1 stop
Depart: Fri Jun 23 2017 Return: Wed Jul 12 2017 Trip spans 20 days
Major Airline
Major Airline
ONT
LGW
20h 25m
2 stops
LGW
ONT
19h 58m
2 stops
Depart: Sun Apr 2 2017 Return: Tue Apr 25 2017 Trip spans 24 days
British Airways
British Airways
ONT
LHR
14h 31m
1 stop
LHR
ONT
21h 48m
2 stops
Depart: Tue Apr 11 2017 Return: Wed Apr 19 2017 Trip spans 9 days
Delta
Delta
ONT
LHR
12h 33m
1 stop
LHR
ONT
16h 24m
1 stop
Depart: Sat Aug 12 2017 Return: Sat Aug 26 2017 Trip spans 15 days
American Airlines
American Airlines
ONT
LGW
28h 20m
2 stops
LGW
ONT
18h 04m
2 stops
Depart: Tue May 2 2017 Return: Thu May 11 2017 Trip spans 10 days
British Airways
British Airways
ONT
LHR
18h 25m
1 stop
LHR
ONT
19h 52m
2 stops
Depart: Wed May 3 2017 Return: Wed May 10 2017 Trip spans 8 days
British Airways
British Airways
ONT
LHR
18h 50m
1 stop
LHR
ONT
16h 13m
1 stop
Depart: Sun Aug 20 2017 Return: Mon Aug 28 2017 Trip spans 9 days
British Airways
British Airways
ONT
LHR
24h 21m
1 stop
LHR
ONT
18h 18m
1 stop
Depart: Mon Jun 5 2017 Return: Mon Jun 19 2017 Trip spans 15 days
American Airlines
American Airlines
ONT
LHR
13h 05m
1 stop
LHR
ONT
14h 59m
1 stop
Depart: Tue May 16 2017 Return: Sun May 28 2017 Trip spans 13 days
Delta
Delta
ONT
LGW
19h 25m
2 stops
LGW
ONT
18h 37m
2 stops
Depart: Sun Aug 27 2017 Return: Thu Sep 7 2017 Trip spans 12 days
British Airways
British Airways
ONT
LHR
24h 21m
1 stop
LHR
ONT
18h 18m
1 stop
Depart: Wed May 24 2017 Return: Mon May 29 2017 Trip spans 6 days
American Airlines
American Airlines
ONT
LHR
14h 35m
1 stop
LHR
ONT
15h 05m
1 stop
Depart: Thu Jul 13 2017 Return: Thu Aug 10 2017 Trip spans 29 days
United
United
ONT
LHR
21h 05m
2 stops
LHR
ONT
18h 53m
2 stops
Depart: Fri Mar 31 2017 Return: Mon Apr 10 2017 Trip spans 11 days
British Airways
British Airways
ONT
LHR
16h 35m
1 stop
LHR
ONT
16h 57m
1 stop
Depart: Wed Apr 19 2017 Return: Sun Apr 30 2017 Trip spans 12 days
Delta
Delta
ONT
LGW
19h 25m
2 stops
LGW
ONT
52h 39m
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.

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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.

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

Ontario
$570
Destination

London
only $570
only $602