ONT - LHR

Find Cheap Flights from Ontario to London Heathrow

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Economy
Ontario (ONT)
London Heathrow
Wed 20/11
Wed 27/11
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Ontario to London Heathrow flight information

Flights arrive in London Heathrow
Flights depart from Ontario
Flight price £280
Distance 5,410 miles
Airlines British Airways

Good to know

Low season:
April
Best time to beat the crowds
3%
expected price decrease
High season:
June
Most popular time to fly
16%
expected price increase
Average price:
£425
(price for this month)
Good deal:
£489
or less return trip within
2 months
of travel is a good deal

When to Book Flights from Ontario to London Heathrow

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for finding a cheap flight

The cheapest flight from Ontario to London Heathrow was found, on average, 42 days before departure.
Book at least 4 weeks before departure in order to get a below-average price.
High season is considered to be May, June and July. The cheapest month to fly is April.
Morning departure is around 243% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Ontario to London Heathrow Flights

How long does a flight from Ontario to London Heathrow take?
There are no direct flights for this route listed on KAYAK, the shortest multi-flight duration is 12h 57m.
Which airlines provide the cheapest flights from Ontario to London Heathrow?
In the past 3 days, the cheapest return tickets were found on British Airways (£280)
What’s the cheapest day of the week to fly from Ontario to London Heathrow?
For Ontario to London Heathrow, Wednesday is the cheapest day to fly on average and Friday is the most expensive. Flying from London Heathrow back to Ontario, the best deals are generally found on Monday, with Wednesday being the most expensive.
How does KAYAK find such low flight prices?
KAYAK processes over 2 billion travel queries annually and displays results from hundreds of airlines and third party sites, allowing it to find a variety of flight prices and options. It also displays results from 2M+ properties along with car hire, holiday packages, activities and millions of verified reviews so users can see as many available travel options as possible.
How can Hacker Fares save me money?
Hacker Fares allow you to combine one-way tickets on different airlines when it can save you money over a traditional return ticket.
Does KAYAK query more flight providers than competitors?
Yes, KAYAK has access to more data and information than online travel agencies and consistently outperforms the competition in accuracy, globally.
How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a given destination and date is likely to change within 7 days, so travellers know whether to wait or book now.

Book cheap flights from Ontario to London Heathrow (return)

Airports
Origin
Ontario
£280
only
£280
Destination
London
£280
only
£280
Wed, 8 Jan
ONT
Ontario
LHR
London Heathrow
16h 50m
Wed, 15 Jan
LHR
London Heathrow
ONT
Ontario
24h 38m
£280
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
MXP
LHR
Excellent 8.0

Pros: Crew was amazing.

Cons: First leg of our trip on British air on a smaller plane with lots of comfort and room. Our 2nd and long leg was on a larger and newer plane. Leg room and room for the tray table was so tight and uncomfortable for a long Flight. Paid extra for end seating and using British air for transfers through Heathrow as an American Air partner. Will try to avoid the extra cost in the future.

SIN
SYD
Excellent 8.3

Pros: The crew was great and seating an entertainment options were wonderful.

Cons: Food. Other airlines in Asia have a far better selection of meals.

TFS
LGW
Okay 5.6

Pros: Crew were good early on but didn’t check later on

Cons: It was ridiculously hot and the crew didn’t offer water after initial drinks run and we were seriously dehydrated. The flight was delayed and although the first half an hour we had excellent service there was no follow up service and the temperature in the plane was really very uncomfortable

LHR
ABZ
Excellent 9.5

Pros: Everyone on the crew was very friendly, even for a short flight.

BCN
LHR
Good 6.0

Pros: Seats were comfortable and plane was clean

Cons: Provide a hot drink and Small snavk

Wed, 5 Feb
ONT
Ontario
LHR
London Heathrow
16h 37m
Wed, 12 Feb
LHR
London Heathrow
ONT
Ontario
21h 15m
£280
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
YVR
LHR
Okay 4.0

Pros: The crew was ok. They seemed really hectic between Heathrow to Rome.

Cons: The seats were too tiny for business class. Nowhere to put anything. So close to next passenger. I would not fly business class again on BA Terrible entertainment. No interesting movies. I guess they tried to have movies only with British actors/actresses. Nothing current. That’s pretty bad for almost. 10 hours flt. He seats in business class between Heathrow to Rome were like regular seats except with the middle seat blocked off. Food was just ok.

FRA
LHR
Good 7.0

Cons: I paid extra for the seat but it was very cramped.

BHD
LHR
Mediocre 2.0

Pros: Nothing British airways was fine

Cons: Your website messed up and booked my flight for the wrong month. I booked sept 20 2019 and your site errored out. Eventually it booked the flight but apparently it was for oct 20, 2019 and I couldn’t get a refund because it was through kayak not British airways. I’m never using kayak ever again

JMK
LHR
Good 6.8

Pros: Crew was very polite & friendly. Chicken & bacon sandwich was tasty, good amount of mayo!

Cons: A bit chaotic boarding in Mykonos... not BA’s fault! Bathroom was a bit smelly.

LHR
FRA
Okay 4.0

Cons: No delays

Wed, 15 Apr
ONT
Ontario
LHR
London Heathrow
13h 47m
Tue, 28 Apr
LHR
London Heathrow
ONT
Ontario
15h 39m
£287
Trip: 14 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
LHR
ORD
Excellent 10.0

Pros: Service and drinks

SEZ
LHR
Good 7.6

Pros: Excellent crew support for traveling with a wheelchair.

Cons: Food and entertainment.

YVR
LHR
Okay 4.0

Pros: The crew was ok. They seemed really hectic between Heathrow to Rome.

Cons: The seats were too tiny for business class. Nowhere to put anything. So close to next passenger. I would not fly business class again on BA Terrible entertainment. No interesting movies. I guess they tried to have movies only with British actors/actresses. Nothing current. That’s pretty bad for almost. 10 hours flt. He seats in business class between Heathrow to Rome were like regular seats except with the middle seat blocked off. Food was just ok.

PLZ
JNB
Good 7.3

Cons: Direct flights to and from South Africa to USA not via Middle East

LHR
MIA
Excellent 10.0

Pros: Service and food

Wed, 20 Nov
ONT
Ontario
LHR
London Heathrow
14h 28m
Wed, 27 Nov
LHR
London Heathrow
ONT
Ontario
16h 58m
£294
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
LHR
ATH
Good 7.6

Cons: Plugs to charge devices

LHR
MXP
Good 6.0

Cons: Wheelchair assistance at Heathrow was very very slow it took 2 hours to change gates within Terminal 5

TFS
LGW
Okay 5.6

Pros: Crew were good early on but didn’t check later on

Cons: It was ridiculously hot and the crew didn’t offer water after initial drinks run and we were seriously dehydrated. The flight was delayed and although the first half an hour we had excellent service there was no follow up service and the temperature in the plane was really very uncomfortable

BAH
LHR
Excellent 9.3

Pros: Super great crew and super great seats

Cons: Nothing! It was great!

LHR
FRA
Okay 4.0

Cons: No delays

Thu, 5 Dec
ONT
Ontario
LHR
London Heathrow
32h 20m
Mon, 9 Dec
LHR
London Heathrow
ONT
Ontario
38h 25m
£294
Trip: 5 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
LGW
OPO
Okay 4.0

Cons: Less leg room than on other airlines, Crew was noisy, credit card reader was broken so all payments processed manually, maybe they were behind schedule because of this and were rushing through the cabin as a big group

LGW
MCO
Okay 5.3

Pros: The crew was great, as always. Unfortunately, my seat mate was very overweight, pushing into my space. No fault of BA except that bigger seats would help the "growing" population of travelers.

Cons: Bigger seats for bigger travelers. Especially on long flights. Those of us that are less full figured would be more comfortable. Go back to the system that includes one checked bag and one carry on as included in the advertised price. I know that airlines need to be more competitive, but the ala carte for luggage is not acceptable. Instead, offer an opportunity for customers t donate to offset the carbon impact. Thanks

GVA
LHR
Excellent 10.0

Pros: All was good and on time

Cons: Just be good, they could still offer free drinks or water to passengers

LHR
FRA
Okay 4.0

Cons: No delays

ATL
LHR
Excellent 10.0

Pros: Free Wifi

Cons: Free Wifi all over the flight

Tue, 24 Mar
ONT
Ontario
LHR
London Heathrow
14h 15m
Tue, 31 Mar
LHR
London Heathrow
ONT
Ontario
31h 00m
£296
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
PMI
MAD
Mediocre 3.0

Cons: You could have not cancelled my flight after rebooking a connection

GVA
LHR
Excellent 10.0

Pros: All was good and on time

Cons: Just be good, they could still offer free drinks or water to passengers

IAD
LHR
Good 7.0

Cons: Wheel chair assistance at Heathrow was very very slow it took 2 hours to change gates in Terminal 5

SEZ
LHR
Good 7.6

Pros: Excellent crew support for traveling with a wheelchair.

Cons: Food and entertainment.

LHR
ABZ
Excellent 9.5

Pros: Everyone on the crew was very friendly, even for a short flight.

Fri, 27 Mar
ONT
Ontario
LHR
London Heathrow
13h 37m
Fri, 17 Apr
LHR
London Heathrow
ONT
Ontario
15h 03m
£302
Trip: 22 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
JFK
LHR
Mediocre 3.6

Pros: We got to London on time

Cons: Is an old plane with a old hard product needs to be retired or retrofitted

SFO
LHR
Excellent 8.0

Pros: the food was really good and the service was good.

Cons: the entertainment system for the trip from lhr to acc was a bit outdated

LHR
GOT
Okay 5.0

Cons: Punctuality. I landed over 2 hours late

LHR
BOS
Okay 4.6

Cons: Didn't make it to this flight due to problems described in aforementioned flight (madrid to London). Was stranded in London overnight.

LHR
FRA
Okay 4.0

Cons: No delays

Fri, 24 Apr
ONT
Ontario
LHR
London Heathrow
14h 10m
Sun, 26 Apr
LHR
London Heathrow
ONT
Ontario
15h 03m
£302
Trip: 3 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
LCY
AMS
Poor 0.0

Cons: With 2h30 hours delayed flight I missed my train and had to have a hotel Arcturus airport in Amsterdam and continue my journey only the day after.

TFS
LGW
Okay 5.6

Pros: Crew were good early on but didn’t check later on

Cons: It was ridiculously hot and the crew didn’t offer water after initial drinks run and we were seriously dehydrated. The flight was delayed and although the first half an hour we had excellent service there was no follow up service and the temperature in the plane was really very uncomfortable

BAH
LHR
Excellent 9.3

Pros: Super great crew and super great seats

Cons: Nothing! It was great!

SVQ
LGW
Mediocre 2.0

Pros: In hour 20 of delays and being held in a room with no access to water

Cons: Absolutely everything. Access to food or water. Basic communication. A semblance of organization.

JFK
LHR
Mediocre 3.6

Pros: We got to London on time

Cons: Is an old plane with a old hard product needs to be retired or retrofitted

Thu, 28 Nov
ONT
Ontario
LHR
London Heathrow
25h 36m
Wed, 11 Dec
LHR
London Heathrow
ONT
Ontario
20h 54m
£369
Trip: 14 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
SFO
LHR
Excellent 8.0

Pros: the food was really good and the service was good.

Cons: the entertainment system for the trip from lhr to acc was a bit outdated

LGW
MCO
Okay 5.3

Pros: The crew was great, as always. Unfortunately, my seat mate was very overweight, pushing into my space. No fault of BA except that bigger seats would help the "growing" population of travelers.

Cons: Bigger seats for bigger travelers. Especially on long flights. Those of us that are less full figured would be more comfortable. Go back to the system that includes one checked bag and one carry on as included in the advertised price. I know that airlines need to be more competitive, but the ala carte for luggage is not acceptable. Instead, offer an opportunity for customers t donate to offset the carbon impact. Thanks

BNA
LHR
Okay 5.6

Cons: Three hour delay!

PMI
MAD
Mediocre 3.0

Cons: You could have not cancelled my flight after rebooking a connection

VCE
LHR
Good 7.6

Cons: I badly needed more leg room.

Wed, 4 Dec
ONT
Ontario
LHR
London Heathrow
14h 30m
Sun, 8 Dec
LHR
London Heathrow
ONT
Ontario
16h 01m
£382
Trip: 5 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
JFK
LHR
Mediocre 3.6

Pros: We got to London on time

Cons: Is an old plane with a old hard product needs to be retired or retrofitted

TLV
LHR
Good 6.6

Pros: The flight was relatively on time and the crew was nice

Cons: The food was not the British Airways high quality

PHL
EDI
Excellent 10.0

Pros: There was a special needs boy that sat behind me and he had some issues (long flight, understandable) and the crew were AMAZING with him. Not everyone has common or even human decency. These people were rad, and it was lovely to see.

BIO
LGW
Poor 0.0

Pros: BA cancelled my flight, but did offer an alternate on Lufthansa on same day,

Cons: Being notified of the cancellation, instead of accidentally finding out about it. Very poor or lack of communication regarding cancellation due to pilots' strike.

ATL
LHR
Excellent 10.0

Pros: Free Wifi

Cons: Free Wifi all over the flight

Thu, 26 Mar
ONT
Ontario
LHR
London Heathrow
31h 14m
Fri, 3 Apr
LHR
London Heathrow
ONT
Ontario
15h 44m
£396
Trip: 9 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
JFK
LHR
Excellent 8.0

Pros: Friendly service

DXB
LHR
Okay 5.6

Pros: Crew were brilliant and I felt well looked-after.

Cons: Bizarre flight with lunch of pasta and broccoli at breakfast time and then the whole flight was in the dark as most people were sleeping. Grotty 22-year old plane.

SVQ
LGW
Mediocre 2.0

Pros: In hour 20 of delays and being held in a room with no access to water

Cons: Absolutely everything. Access to food or water. Basic communication. A semblance of organization.

IST
LHR
Okay 4.3

Cons: Old plane

LHR
GOT
Okay 5.0

Cons: Punctuality. I landed over 2 hours late

Sat, 4 Apr
ONT
Ontario
LHR
London Heathrow
13h 47m
Sat, 11 Apr
LHR
London Heathrow
ONT
Ontario
15h 03m
£422
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
LHR
JFK
Excellent 8.3

Pros: Friendly staff, easy check in. Professional and courteous on board.

Cons: Food could be better of course and the price could be better,

BCN
LHR
Good 6.0

Pros: Seats were comfortable and plane was clean

Cons: Provide a hot drink and Small snavk

LHR
GOT
Okay 5.0

Cons: Punctuality. I landed over 2 hours late

LHR
DFW
Okay 4.0

Pros: The staff was amazing. Took care of the flight well.

Cons: The seats that I purchased were “premium economy” the only thing premium was the price I have flown premium with other airlines and there is a difference in leg room and seat size. There was none on this flight. The seats were the same size and room as regular economy. Not what I paid for. I will never fly BA again.

BHD
LHR
Mediocre 2.0

Pros: Nothing British airways was fine

Cons: Your website messed up and booked my flight for the wrong month. I booked sept 20 2019 and your site errored out. Eventually it booked the flight but apparently it was for oct 20, 2019 and I couldn’t get a refund because it was through kayak not British airways. I’m never using kayak ever again

Fri, 6 Dec
ONT
Ontario
LHR
London Heathrow
13h 25m
Thu, 12 Dec
LHR
London Heathrow
ONT
Ontario
16h 06m
£435
Trip: 7 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
GVA
LHR
Excellent 10.0

Pros: All was good and on time

Cons: Just be good, they could still offer free drinks or water to passengers

BIO
LGW
Poor 0.0

Pros: BA cancelled my flight, but did offer an alternate on Lufthansa on same day,

Cons: Being notified of the cancellation, instead of accidentally finding out about it. Very poor or lack of communication regarding cancellation due to pilots' strike.

VCE
LHR
Good 7.6

Cons: I badly needed more leg room.

LHR
JTR
Excellent 10.0

Pros: Sarah the Cabin Manager was amazing.

Cons: The business seats are horrible

LHR
ACC
Good 7.6

Pros: good food

Cons: the entertainment system is outdated

Mon, 28 Oct
ONT
Ontario
LHR
London Heathrow
14h 05m
Mon, 18 Nov
LHR
London Heathrow
ONT
Ontario
20h 54m
£700
Trip: 22 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
LHR
ORD
Excellent 10.0

Pros: Service and drinks

TFS
LGW
Okay 5.6

Pros: Crew were good early on but didn’t check later on

Cons: It was ridiculously hot and the crew didn’t offer water after initial drinks run and we were seriously dehydrated. The flight was delayed and although the first half an hour we had excellent service there was no follow up service and the temperature in the plane was really very uncomfortable

ATL
LHR
Excellent 10.0

Pros: Free Wifi

Cons: Free Wifi all over the flight

ZRH
LHR
Mediocre 3.3

Pros: Entertainment system was decent.

Cons: Crew was pretty unfriendly abs the food was very poor.

BCN
LHR
Good 6.0

Pros: Seats were comfortable and plane was clean

Cons: Provide a hot drink and Small snavk

Thu, 31 Oct
ONT
Ontario
LHR
London Heathrow
12h 57m
Fri, 8 Nov
LHR
London Heathrow
ONT
Ontario
16h 00m
£723
Trip: 9 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
LHR
LAX
Excellent 8.3

Cons: Just not enough room in the economy class, especially when the person in front reclines their seat.

YVR
LHR
Okay 4.0

Pros: The crew was ok. They seemed really hectic between Heathrow to Rome.

Cons: The seats were too tiny for business class. Nowhere to put anything. So close to next passenger. I would not fly business class again on BA Terrible entertainment. No interesting movies. I guess they tried to have movies only with British actors/actresses. Nothing current. That’s pretty bad for almost. 10 hours flt. He seats in business class between Heathrow to Rome were like regular seats except with the middle seat blocked off. Food was just ok.

LHR
MXP
Good 6.0

Cons: Wheelchair assistance at Heathrow was very very slow it took 2 hours to change gates within Terminal 5

LCY
AMS
Poor 0.0

Cons: With 2h30 hours delayed flight I missed my train and had to have a hotel Arcturus airport in Amsterdam and continue my journey only the day after.

LHR
FRA
Okay 4.0

Cons: No delays

Fri, 25 Oct
ONT
Ontario
LHR
London Heathrow
13h 17m
Sun, 27 Oct
LHR
London Heathrow
ONT
Ontario
15h 45m
£2366
Trip: 3 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,129 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
PSA
LHR
Excellent 10.0

Pros: Service

LHR
MAN
Mediocre 2.0

Cons: They made me checkin a small bag

LHR
ABZ
Excellent 9.5

Pros: Everyone on the crew was very friendly, even for a short flight.

LCY
AMS
Poor 0.0

Cons: With 2h30 hours delayed flight I missed my train and had to have a hotel Arcturus airport in Amsterdam and continue my journey only the day after.

JFK
LHR
Excellent 8.0

Pros: Friendly service

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
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