Find Deals on Flights from Ontario to London Heathrow (ONT - LHR)

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 Heathrow

(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: 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: Fri Mar 10 2017 Return: Fri Mar 24 2017 Trip spans 14 days
United
United
ONT
LHR
13h 10m
1 stop
LHR
ONT
18h 59m
2 stops
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: 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 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: Sun Jan 8 2017 Return: Tue Jan 17 2017 Trip spans 10 days
United
United
ONT
LHR
15h 12m
1 stop
LHR
ONT
20h 19m
1 stop
Depart: Thu Apr 6 2017 Return: Sun Apr 16 2017 Trip spans 11 days
Delta
Delta
ONT
LHR
17h 15m
1 stop
LHR
ONT
13h 27m
1 stop
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: Wed Feb 1 2017 Return: Wed Feb 8 2017 Trip spans 8 days
United
United
ONT
LHR
12h 55m
1 stop
LHR
ONT
20h 49m
2 stops
Depart: Sat Apr 8 2017 Return: Tue Apr 18 2017 Trip spans 11 days
United
United
ONT
LHR
13h 00m
1 stop
LHR
ONT
16h 18m
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: Fri Mar 24 2017 Return: Sat Apr 1 2017 Trip spans 9 days
United
United
ONT
LHR
15h 55m
1 stop
LHR
ONT
18h 24m
1 stop
Depart: Tue Dec 27 2016 Return: Mon Jan 9 2017 Trip spans 14 days
Delta
Delta
ONT
LHR
23h 35m
1 stop
LHR
ONT
14h 20m
1 stop
Depart: Tue Jun 27 2017 Return: Wed Jul 5 2017 Trip spans 9 days
Delta
Delta
ONT
LHR
22h 40m
1 stop
LHR
ONT
13h 30m
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: 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: Fri Jun 2 2017 Return: Sun Jun 11 2017 Trip spans 10 days
Delta
Delta
ONT
LHR
30h 25m
1 stop
LHR
ONT
32h 40m
2 stops
Depart: Sun Jun 25 2017 Return: Sun Jul 23 2017 Trip spans 29 days
United
United
ONT
LHR
13h 00m
1 stop
LHR
ONT
28h 53m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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.

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Airports
Origin

Ontario
$566
Destination

London
$566