LHR - ONT

Find Cheap Flights from London Heathrow to Ontario

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Ontario
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London Heathrow to Ontario flight information

Flights arrive in Ontario
Flights depart from London Heathrow
Flight price £314
Distance 5,410 miles
Airlines Virgin Atlantic, United Airlines, British Airways

Good to know

Low season:
February
Best time to beat the crowds
7%
expected price decrease
High season:
July
Most popular time to fly
18%
expected price increase
Average price:
£469
(avg. price over the last 2 weeks)
Good deal:
£356
or less (return)

When to Book Flights from London Heathrow to Ontario

Average price per month

Top tips for finding a cheap flight

Looking for a cheap flight? 25% of our users found flights on this route for £355 or less.
Book at least 1 week before departure in order to get a below-average price.
High season is considered to be June, July and August. The cheapest month to fly is February.
Morning departure is around 238% 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 London Heathrow to Ontario Flights

How long does a flight from London Heathrow to Ontario take?
There are no direct flights for this route listed on KAYAK, the shortest multi-flight duration is 15h 04m.
Which airlines provide the cheapest flights from London Heathrow to Ontario?
In the past 3 days, the cheapest return tickets were found on Virgin Atlantic (£314), United Airlines (£425) and British Airways (£450).
What’s the cheapest day of the week to fly from London Heathrow to Ontario?
For London Heathrow to Ontario, Friday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Ontario back to London Heathrow, the best deals are generally found on Wednesday, with Friday 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 London Heathrow to Ontario (return)

Airports
Origin
London
£314
only
£314
Destination
Ontario
£314
only
£314
Fri, 14 Feb
LHR
London Heathrow
ONT
Ontario
21h 54m
Fri, 21 Feb
ONT
Ontario
LHR
London Heathrow
16h 34m
£314
Trip: 8 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 1,509 reviews
Overall
8.1
Boarding
8.2
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
LHR
MIA
Good 7.3

Pros: Speedy boarding and good locker space

Cons: Lack of room in seat especially with seat in front reclined.

LGW
MCO
Excellent 9.0

Pros: Loads of leg room compared with other flights (I'm 6' and my knees are usually embedded in the seat in front, but not this time!

Cons: USB socket on the entertainment on both flight out and return was broken.

BNE
ZQN
Mediocre 3.6

Cons: Staff were unhelpful and ran out of many food items by the time we were served - meaning that there wasn’t anything available for us to eat as we don’t eat eggs. The check-in was stressful and staff were keen to help - unprofessional and unsatisfactory.

LHR
BOS
Excellent 10.0

Pros: Crew was super helpful and kind. Pesto pasta was the best airplane food I’ve ever had in coach.

BNE
LAX
Excellent 9.3

Pros: such a big difference in size of aircraft, very comfortable and great crew.

Sat, 18 Jan
LHR
London Heathrow
ONT
Ontario
15h 04m
Sat, 25 Jan
ONT
Ontario
LHR
London Heathrow
14h 54m
£425
Trip: 8 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 65,965 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.6
Food
6.5
GEG
DEN
Mediocre 2.0

Pros: Was able to get on another flight

Cons: If they could have held the flight for 15 minutes, I would have made it. My flight from Spokane was late. Now I had to pay another $250 just for a crappy room for the night.

EWR
OKC
Okay 5.0

Pros: Seat belt worked.

Cons: The seats are so uncomfortable. No head or neck support. The entertainment WiFi never worked.

RSW
ORD
Good 6.0

Pros: The pilot told the passengers before the flight took off that there would be some turbulence. It was nice to know about it beforehand

Cons: The crew started serving first class passengers BEFORE boarding was complete, which forced the passengers who had not boarded yet to wait in line until service was complete. This sent a poor message to the economy class telling us we were not important customers

DEN
MKE
Excellent 10.0

Pros: On time departure.

Cons: It was a CRJ-700, but I was cramped...

SFO
EWR
Good 6.6

Cons: Not enough room

Fri, 1 Nov
LHR
London Heathrow
ONT
Ontario
18h 28m
Thu, 14 Nov
ONT
Ontario
LHR
London Heathrow
16h 43m
£450
Trip: 14 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,108 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
AMS
LHR
Excellent 9.5

Cons: Understand sometimes out of airlines control but reduce delays

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,

CDG
LHR
Excellent 10.0

Pros: The food was great—snacks, meals, drinks—all complimentary!

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

AMS
LGW
Excellent 8.6

Pros: Flights were on time. Good food portion for longer flights. Good pilots and cabin crew.

Sat, 28 Dec
LHR
London Heathrow
ONT
Ontario
22h 19m
Sat, 18 Jan
ONT
Ontario
LHR
London Heathrow
20h 55m
£318
Trip: 22 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 1,509 reviews
Overall
8.1
Boarding
8.2
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
MAN
JFK
Okay 4.3

Cons: Seats were really old and outdated

JNB
LHR
Good 7.6

Pros: Most of it was of a reasonable standard.

Cons: Plane was full

LHR
MIA
Good 7.0

Pros: Not crowded. Crew was good.

Cons: Not taking a bus to board the plane.

BNE
ZQN
Mediocre 3.6

Cons: Staff were unhelpful and ran out of many food items by the time we were served - meaning that there wasn’t anything available for us to eat as we don’t eat eggs. The check-in was stressful and staff were keen to help - unprofessional and unsatisfactory.

LHR
SEA
Excellent 8.6

Pros: Crew was great!

Cons: The scone and roll were blah and dry - and so much bread in one meal!!! My seat charger didn’t work :(

Sat, 28 Dec
LHR
London Heathrow
ONT
Ontario
22h 19m
Sun, 19 Jan
ONT
Ontario
LHR
London Heathrow
20h 55m
£323
Trip: 23 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 1,509 reviews
Overall
8.1
Boarding
8.2
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
LHR
SFO
Excellent 10.0

Pros: Craig in first cabin flight crew was amazing. :))))

LHR
ATL
Excellent 10.0

Pros: The crew was amazing and effiecent. Had weather delays, bag got left, but got it the next day.

LHR
ATL
Good 6.3

Cons: My tv screen could not show the movies

LHR
DEL
Okay 5.3

Pros: Crew was attentive.

Cons: Tiny, uncomfortable seats with warn cushions.

LHR
LAS
Excellent 9.3

Pros: Crew was great flight was comfortable however checking in bags and printing boarding pass was slow and also very unorganized

Cons: Checking in bags and printing boarding passes were long unorganized lines of people

Thu, 16 Jan
LHR
London Heathrow
ONT
Ontario
15h 04m
Thu, 23 Jan
ONT
Ontario
LHR
London Heathrow
13h 39m
£556
Trip: 8 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 65,965 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.6
Food
6.5
BOS
ORD
Okay 5.3

Pros: Most uncomfortable plane that I've ever been on

Cons: Seat space

DEN
PHL
Okay 5.0

Cons: Kept getting delayed

SFO
EWR
Good 6.6

Cons: Not enough room

DEN
ORD
Mediocre 2.5

Pros: No room. Delays.

Cons: Board me 1st.

AUS
IAH
Mediocre 3.2

Cons: Had to sit on the tarmac for 35 minutes because our flight was “randomly” selected to wait because there was too much air traffic over Houston. Result: I missed my connection to my final destination. The airline promised that the other flights were alerted of the delay and that people would be there to assist. May departure gate was literally two gates away from my arrival gate in Houston. No one was there to help. No exceptions were made to get me on the flight, even as it was delayed at the gate for 15 minutes, meaning that they could have gotten me aboard. The whole experience made me very angry. After all this, I had to wait an additional two hours for the next flight.

Sat, 15 Feb
LHR
London Heathrow
ONT
Ontario
18h 25m
Sat, 22 Feb
ONT
Ontario
LHR
London Heathrow
14h 35m
£585
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,108 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
BUD
LHR
Good 6.3

Cons: Offer water or soft drink without buying it.

LAX
LHR
Excellent 10.0

Cons: Nothing

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.

VCE
LHR
Good 7.6

Cons: I badly needed more leg room.

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.

Thu, 31 Oct
LHR
London Heathrow
ONT
Ontario
16h 19m
Thu, 7 Nov
ONT
Ontario
LHR
London Heathrow
13h 30m
£560
Trip: 8 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 65,965 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.6
Food
6.5
ORD
SDF
Okay 5.6

Pros: Nothing

Cons: Delays, bumpy ride, narrow seats, no drinks.

DEN
CLT
Good 6.0

Cons: Although in first class, the service was subpar. The attendant did not smile, told me to look in the magazine when I asked if there were any dishes without cheese . She left an empty glass on my tray for the entire flight!

ORD
AUS
Good 6.0

Pros: It was okay. I slept mostly. The crew was professional and friendly.

Cons: Even thought I got off a plane and direct to another I had to to go through security again. This meant I had no time to get any food or drink. I got to the new gate after boarding had started. Again, the flights were to close together.

LAX
HNL
Excellent 10.0

Pros: I really love Hawaii it was beautiful.

Cons: It was perfect

PVR
IAH
Mediocre 2.0

Cons: Flight was delayed. Didn't make connecting flight in Houston. Had to stay overnight in Houston.

Fri, 3 Apr
LHR
London Heathrow
ONT
Ontario
19h 31m
Fri, 17 Apr
ONT
Ontario
LHR
London Heathrow
20h 05m
£567
Trip: 15 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 1,509 reviews
Overall
8.1
Boarding
8.2
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
LHR
SFO
Excellent 10.0

Pros: Virgin Atlantic is the best airline I’ve ever flown on internationally. The service is wonderful, from check in to inflight service. Everything went as planned. The food and drinks on board are free and they are an abundance of snacks, much more than we dreamed. The flight attendants are excellent

Cons: No. Keep up the good work!

LAX
BNE
Excellent 10.0

Pros: Excellent airline

Cons: The business seats could have been wider. I have sat on business class other airlines and the seat was a bit wider but overall still great experience

LAX
LHR
Mediocre 2.0

Cons: I cancelled this flight online, then I called to let them know I was getting emails, but that I had cancelled. For two days I received emails about delayed flights and now this.

MAN
ATL
Excellent 8.0

Pros: The food was good. The lane was comfortable

Cons: The flight was nearly full, and the 767 is a large aircraft. I think it would be preferable if Virgin Atlantic would board the plane by zones, similar to other airlines.

CHC
BNE
Good 6.0

Cons: There is no entertainment, not really required on a short flight but nice when offered.

Fri, 27 Mar
LHR
London Heathrow
ONT
Ontario
16h 08m
Thu, 16 Apr
ONT
Ontario
LHR
London Heathrow
14h 55m
£905
Trip: 21 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 65,965 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.6
Food
6.5
IAD
FCO
Good 7.0

Cons: This flight was booked as a Lufthansa flight, but the actual flight was United. It was OK, but not the service or comfort when I flew Lufthansa in the past.

IAH
GUA
Okay 4.3

Pros: Avaiability

Cons: Service

MKE
ORD
Okay 5.3

Pros: Crew professional. Flight on time and clean

Cons: Seating room was horrible. My knees hit the seat on front of me, fortunately the gentleman sitting there did not try to recline. Seat very narrow As well as isle. Controls for monitor in seat back on arm rest and I kept activating it accidentally while trying to nap which was annoying. I’m 6’1” and 190 pounds so am not what I’d consider oversized but I’ve not been this uncomfortable on a flight in many years. Will make a note to avoid this line and plane in the future

RSW
ORD
Good 6.0

Pros: The pilot told the passengers before the flight took off that there would be some turbulence. It was nice to know about it beforehand

Cons: The crew started serving first class passengers BEFORE boarding was complete, which forced the passengers who had not boarded yet to wait in line until service was complete. This sent a poor message to the economy class telling us we were not important customers

GEG
SFO
Good 6.3

Cons: A safe, quiet set of flights. Nothing really unusual, which is a good thing. US airlines suck badly in cuisine and this trip reinforcedji

Sat, 19 Oct
LHR
London Heathrow
ONT
Ontario
17h 02m
Sat, 26 Oct
ONT
Ontario
LHR
London Heathrow
15h 27m
£1186
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,108 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.

MAN
LHR
Excellent 8.0

Pros: Crew was courteous and friendly.

LHR
GOT
Okay 5.0

Cons: Punctuality. I landed over 2 hours late

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

LHR
MIA
Excellent 10.0

Pros: Service and food

Sun, 22 Dec
LHR
London Heathrow
ONT
Ontario
29h 21m
Thu, 2 Jan
ONT
Ontario
LHR
London Heathrow
14h 06m
£1042
Trip: 12 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 65,965 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.6
Food
6.5
MCO
EWR
Mediocre 2.0

Pros: Nothing

Cons: 100% of staff was rude and they love to nickel and dime you.

SJU
IAH
Excellent 8.0

Pros: Flight landed earlier than scheduled making my connecting flight much easier

Cons: None

BOS
ORD
Okay 5.3

Pros: Most uncomfortable plane that I've ever been on

Cons: Seat space

BOS
DEN
Mediocre 3.6

Cons: I paid $100 for an upgrade on a United which turned out to be the first row, and right beside the rest room (which was erroneously showing as occupied for the first 20 minutes). The traffic made it feel like I was sitting on a bench in Grand Central Station. I chose an aisle seat but ended up mysteriously in the middle seat. I had extra leg room but if I’d eaten the free 5 pretzels I wouldn’t have been able to fit it my seat any longer. The WiFi wasn’t working for the first hour of the flight. The flight attendant got really annoyed when we didn’t look up when he came by with beverages the first time. We all had headphones on and were looking at our personal screens. The activity by the rest room was constant so we didn’t notice it wasn’t just someone waiting for the loo. The luggage took so long to come out I thought my conference would be over before I got it. Overall, I thought it was bad and confirmed why I don’t fly United. Old, dingy planes, poor service. The pilot was pleasant and communicative so there was at least that...

SFO
EWR
Good 6.6

Cons: Not enough room

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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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