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
Students
under 26
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 Feb 28 2017 Return: Wed Mar 15 2017 Trip spans 15 days
Major Airline
Major Airline
ONT
LHR
15h 22m
2 stops
LHR
ONT
16h 36m
2 stops
Depart: Sun Mar 5 2017 Return: Tue Mar 14 2017 Trip spans 9 days
United
United
ONT
LHR
13h 22m
1 stop
LHR
ONT
18h 59m
2 stops
Depart: Thu Feb 16 2017 Return: Tue Feb 28 2017 Trip spans 13 days
Delta
Delta
ONT
LHR
17h 50m
1 stop
LHR
ONT
14h 25m
1 stop
Depart: Sat Apr 8 2017 Return: Sat Apr 15 2017 Trip spans 8 days
Virgin Atlantic
Virgin Atlantic
ONT
LHR
19h 05m
1 stop
LHR
ONT
15h 06m
1 stop
Depart: Mon Jan 23 2017 Return: Wed Feb 1 2017 Trip spans 10 days
United
United
ONT
LHR
12h 55m
1 stop
LHR
ONT
23h 09m
2 stops
Depart: Thu Jan 5 2017 Return: Fri Jan 27 2017 Trip spans 23 days
Major Airline
Major Airline
ONT
LGW
16h 15m
2 stops
LGW
ONT
36h 54m
2 stops
Depart: Thu Mar 9 2017 Return: Thu Mar 16 2017 Trip spans 7 days
Delta
Delta
ONT
LHR
17h 50m
1 stop
LHR
ONT
18h 15m
1 stop
Depart: Sun Feb 5 2017 Return: Sun Feb 12 2017 Trip spans 8 days
Major Airline
Major Airline
ONT
LGW
16h 15m
2 stops
LGW
ONT
36h 55m
2 stops
Depart: Sun Mar 26 2017 Return: Fri Apr 14 2017 Trip spans 20 days
Delta
Delta
ONT
LHR
23h 20m
1 stop
LHR
ONT
13h 27m
1 stop
Depart: Wed Apr 5 2017 Return: Wed Apr 19 2017 Trip spans 15 days
United
United
ONT
LHR
12h 40m
1 stop
LHR
ONT
16h 18m
1 stop
Depart: Fri Apr 28 2017 Return: Sun May 7 2017 Trip spans 10 days
Delta
Delta
ONT
LHR
17h 15m
1 stop
LHR
ONT
13h 27m
1 stop
Depart: Thu May 11 2017 Return: Tue Jun 6 2017 Trip spans 27 days
Delta
Delta
ONT
LHR
17h 15m
1 stop
LHR
ONT
13h 30m
1 stop
Depart: Thu Dec 29 2016 Return: Fri Jan 27 2017 Trip spans 30 days
Major Airline
Major Airline
ONT
LHR
12h 35m
1 stop
LHR
ONT
17h 53m
1 stop
Depart: Sat Dec 31 2016 Return: Tue Jan 10 2017 Trip spans 11 days
United
United
ONT
LHR
19h 40m
1 stop
LHR
ONT
14h 03m
1 stop
Depart: Sat Dec 31 2016 Return: Sat Jan 28 2017 Trip spans 29 days
Major Airline
Major Airline
ONT
LGW
29h 45m
2 stops
LGW
ONT
36h 54m
2 stops
Depart: Sun Jan 1 2017 Return: Tue Jan 10 2017 Trip spans 10 days
United
United
ONT
LHR
13h 02m
1 stop
LHR
ONT
14h 03m
1 stop
Depart: Mon Dec 19 2016 Return: Mon Jan 23 2017 Trip spans 36 days
Delta
Delta
ONT
LHR
12h 48m
1 stop
LHR
ONT
14h 24m
1 stop
Depart: Mon Dec 26 2016 Return: Mon Jan 2 2017 Trip spans 8 days
$2031
Select
American Airlines
American Airlines
ONT
LGW
17h 05m
2 stops
LGW
ONT
19h 16m
2 stops
Depart: Wed Jun 28 2017 Return: Wed Jul 19 2017 Trip spans 22 days
Major Airline
Major Airline
ONT
LHR
34h 15m
2 stops
LHR
ONT
35h 20m
2 stops
Depart: Tue Dec 27 2016 Return: Wed Jan 11 2017 Trip spans 16 days
Delta
Delta
ONT
LHR
23h 35m
1 stop
LHR
ONT
14h 24m
1 stop
* 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

Ontario
$566
Destination

London
only $566
only $571