LON - ONT

Find Cheap Flights from London to Ontario

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Economy
London (LON)
Ontario
Wed 13/11
Wed 20/11
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London to Ontario flight information

Flights arrive in Ontario
Flights depart from London
Flight price £292
Distance 5,420 miles
Airlines Virgin Atlantic, United Airlines, British Airways, American Airlines

Good to know

Low season:
February
Best time to beat the crowds
8%
expected price decrease
High season:
July
Most popular time to fly
35%
expected price increase
Average price:
£312
(avg. price over the last 2 weeks)
Good deal:
£156
or less (return)

When to Book Flights from London to Ontario

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

Top tips for finding a cheap flight

Looking for a cheap flight? 25% of our users found flights on this route for £155 or less.
The cheapest flight from London to Ontario was found, on average, 48 days before departure.
Book at least 4 weeks 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 213% 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 to Ontario Flights

How long does a flight from London 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 to Ontario?
In the past 3 days, the cheapest return tickets were found on Virgin Atlantic (£292), United Airlines (£420) and British Airways (£488).
What’s the cheapest day of the week to fly from London to Ontario?
For London to Ontario, Tuesday is the cheapest day to fly on average and Monday is the most expensive. Flying from Ontario back to London, the best deals are generally found on Wednesday, with Saturday being the most expensive.
Which airports will I be using when flying from London to Ontario?
When flying out of London you will be using one of these airports: London City, London Gatwick or London Heathrow. You will be landing at Ontario, also known as Ontario Airport.
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 to Ontario (return)

Airports
Origin
London
£292
only
£292
£488
only
£488
£1902
only
£1902
Destination
Ontario
£292
only
£292
Tue, 7 Jan
LHR
London Heathrow
ONT
Ontario
21h 54m
Thu, 16 Jan
ONT
Ontario
LHR
London Heathrow
20h 55m
£292
Trip: 10 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 1,508 reviews
Overall
8.1
Boarding
8.2
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
SEA
LHR
Excellent 10.0

Pros: Although there were delays they kept us informed on a regular basis as to what to expect and seemed genuinely apologetic for any inconveniences. Boarding and deplaning were smooth and efficient. I really appreciated that there was no charge for checking a bag. I am certain that contributes to the ease of everyone getting on and off the plane. Our bags arrived at baggage claim about the same time we got there. I would definitely fly with Virgin Atlantic again.

SYD
AKL
Excellent 8.6

Pros: Business class on the 737 is somewhat basic compared to Virgin Australia's A330, but you still get the same great service, and the food is terrific.

LHR
SEA
Excellent 10.0

Pros: The crew on Virgin Atlantic was superb!

DPS
BNE
Good 7.0

Cons: Squishy space and very late flight unfortunately

RAR
AKL
Excellent 10.0

Pros: The crew looked after us well

Cons: It was all good

Sat, 18 Jan
LHR
London Heathrow
ONT
Ontario
15h 04m
Sat, 25 Jan
ONT
Ontario
LHR
London Heathrow
13h 39m
£420
Trip: 8 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 65,926 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.6
Food
6.5
SLC
DEN
Okay 5.2

Pros: The captain kept us informed about a delay.

Cons: The seats are cramped

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...

DEN
PHL
Okay 5.0

Cons: Kept getting delayed

TUL
DEN
Excellent 10.0

Pros: Heidi was very nice!

Cons: Nothing!

EWR
MKE
Good 7.3

Pros: Love the movies available on the United app

Cons: The A/C was blowing ice cubes at me, which wasn't the worst because it was pretty warm yesterday, but still it was less than ideal.

Sun, 10 Nov
LCY
London City
ONT
Ontario
30h 55m
Mon, 23 Dec
ONT
Ontario
LCY
London City
20h 15m
£488
Trip: 44 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,094 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
LHR
TLV
Excellent 8.6

Pros: Boarding was simple and fast!

Cons: Online checking did not give me the option to change my seat. This could have been better.

LHR
DEN
Good 6.3

Cons: My flight was serviced by British Airways. The temperature in the cabinet was very warm and there were no fan controls. The seats are very narrow. Miserable 9hr flight from London to Denver

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

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.

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.

Sat, 15 Feb
LHR
London Heathrow
ONT
Ontario
19h 44m
Fri, 21 Feb
ONT
Ontario
LHR
London Heathrow
20h 55m
£315
Trip: 7 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 1,508 reviews
Overall
8.1
Boarding
8.2
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
BNE
LAX
Good 6.6

Cons: Media screens are old and miscalibrated. Selection was decent. Food is probably average for the industry which to me is worse than fast food.

LGW
MCO
Excellent 8.3

Pros: The crew were all excellent

Cons: Dinner choice was poor. Starter was just a few salad leaves.

LAX
BNE
Excellent 8.3

Pros: The crew was very good and there was enough leg room.

Cons: The dinner option was underwhelming.

LAX
SYD
Excellent 10.0

Pros: Excellent service!

JNB
LHR
Excellent 8.0

Pros: Crew were great! Neck cushions on chair aren’t adjustable and not comfortable.

Sat, 28 Dec
LHR
London Heathrow
ONT
Ontario
22h 19m
Thu, 9 Jan
ONT
Ontario
LHR
London Heathrow
20h 55m
£359
Trip: 13 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 1,508 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!

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

MEL
HKG
Excellent 10.0

Pros: Everything! From check-in all the way to the landing of the plane I was really satisfied! There were a couple crew members that really made the flight feel so at-home/friendly that one could not help but just smile and relax in the flight. Awesome job crew on Flight VA69!

Cons: I wish my partner and his family were with my parents and I on the flight to enjoy the experience we had as well.

BNE
LAX
Good 6.6

Cons: Media screens are old and miscalibrated. Selection was decent. Food is probably average for the industry which to me is worse than fast food.

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.

Mon, 11 Nov
LHR
London Heathrow
ONT
Ontario
15h 04m
Mon, 25 Nov
ONT
Ontario
LHR
London Heathrow
13h 30m
£432
Trip: 15 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 65,926 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.6
Food
6.5
LAX
HNL
Excellent 10.0

Pros: I really love Hawaii it was beautiful.

Cons: It was perfect

EWR
MAD
Excellent 9.0

Pros: Everything was amazing

TUL
DEN
Excellent 10.0

Pros: Heidi was very nice!

Cons: Nothing!

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

IAH
DTW
Good 6.0

Cons: Flight could’ve been on time.

Sat, 28 Dec
LHR
London Heathrow
ONT
Ontario
22h 19m
Wed, 8 Jan
ONT
Ontario
LHR
London Heathrow
16h 34m
£384
Trip: 12 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 1,508 reviews
Overall
8.1
Boarding
8.2
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
LHR
EWR
Excellent 8.3

Pros: Very friendly crew. We boarded about an hour before so we were ready to go well before time.

Cons: The economy seats are not that comfortable and the screen for entertainment is sometimes difficult to use.

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

ATL
MAN
Excellent 8.6

Pros: The crew was outstanding and the good choices were excellent

Cons: The flight was late( not their fault) and there were several technical difficulties with the A/C and entertainment system

LHR
JNB
Excellent 9.0

Pros: Very friendly crew. The meals are good, nice variety. Hot food is hot.

Cons: Seats are not the most comfortable and sometimes the screen on the entertainment tv doesn't work that easily.

RAR
AKL
Excellent 10.0

Pros: The crew looked after us well

Cons: It was all good

Mon, 18 Nov
LHR
London Heathrow
ONT
Ontario
15h 04m
Mon, 25 Nov
ONT
Ontario
LHR
London Heathrow
13h 30m
£432
Trip: 8 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 65,926 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.6
Food
6.5
OKC
EWR
Excellent 8.6

Pros: Fast and efficient

Cons: Seats could be more comfortable. Especially head rest.

DEN
DFW
Excellent 8.0

Cons: Not leave 2 hours late

IAH
SAN
Excellent 8.0

Pros: Audio should include easy listening, classical and good oldies

Cons: As above

SFO
KIX
Excellent 9.0

Pros: Comfy plane

Cons: Food so so in economy

TUL
DEN
Excellent 10.0

Pros: Heidi was very nice!

Cons: Nothing!

Sat, 18 Jan
LHR
London Heathrow
ONT
Ontario
15h 04m
Sat, 1 Feb
ONT
Ontario
LHR
London Heathrow
14h 54m
£432
Trip: 15 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 65,926 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.

ORD
DEN
Mediocre 2.0

Pros: Didn't happen

Cons: Didn't hapen

LAS
IAH
Okay 5.6

Pros: The plane had lots of leg room.

Cons: Punctuality. The plane left the gate more than 30 minutes after scheduled departure time.

DEN
PHL
Okay 5.0

Cons: Kept getting delayed

IAD
EWR
Good 6.0

Cons: E145 is extremely crowded. No leg room on the left side

Mon, 17 Feb
LHR
London Heathrow
ONT
Ontario
15h 04m
Sun, 23 Feb
ONT
Ontario
LHR
London Heathrow
14h 58m
£432
Trip: 7 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 65,926 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.6
Food
6.5
IAH
SAN
Excellent 8.0

Pros: Audio should include easy listening, classical and good oldies

Cons: As above

SFO
KIX
Excellent 9.0

Pros: Comfy plane

Cons: Food so so in economy

DEN
OMA
Okay 4.0

Cons: Flight was over booked and 1 hr delay

TUL
DEN
Excellent 10.0

Pros: Heidi was very nice!

Cons: Nothing!

SAN
EWR
Okay 5.6

Cons: Tell me to get the United app before we're in the air, I had no entertainment the whole way

Tue, 24 Dec
LHR
London Heathrow
ONT
Ontario
18h 36m
Sun, 5 Jan
ONT
Ontario
LHR
London Heathrow
23h 50m
£642
Trip: 13 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 65,926 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.6
Food
6.5
STL
ORD
Excellent 10.0

Pros: Very good no complaint at all

ORD
SDF
Okay 5.6

Pros: Nothing

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

DEN
PHL
Okay 5.0

Cons: Kept getting delayed

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...

PVG
EWR
Okay 4.0

Pros: The inflight entertainment that’s all

Cons: Better crew and food

Fri, 18 Oct
LGW
London Gatwick
ONT
Ontario
36h 36m
Fri, 25 Oct
ONT
Ontario
LGW
London Gatwick
19h 30m
£1902
Trip: 8 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 41,797 reviews
Overall
7.4
Boarding
7.5
Comfort
7.2
Crew
7.9
Entertainment
6.9
Food
6.7
PHX
IND
Good 6.4

Cons: Why are seats so small?

LHR
ORD
Excellent 10.0

Pros: Crew kept us well hydrated, and were very diligent about picking up trash.

FCO
PHL
Mediocre 3.0

Pros: Actually, the entree was good!

Cons: As always with American, we take off late - today 25 minutes. Constant announcements disrupting sleep - another common feature. And please don't thank me for choosing American, it's the only option from Philadelphia for the locations I travel to. Recently I traveled twice to Newark (an extra hour away) to avoid having to fly American.

CLT
PHL
Excellent 8.0

Cons: legroom

ORD
SFO
Good 6.6

Pros: Crew were very helpful

Cons: I have an injury so I paid extra for 'extra leg room" but there's a wall between economy and business class so very little legroom. My leg was hurting a lot and the flight attendants had to find me a different seat because I could not stay there for 5 hours. I wouldn't have paid extra for this seat.

Wed, 18 Dec
LHR
London Heathrow
ONT
Ontario
29h 21m
Sat, 28 Dec
ONT
Ontario
LHR
London Heathrow
27h 40m
£676
Trip: 11 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 65,926 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.6
Food
6.5
EWR
TLV
Excellent 8.0

Pros: Entertainment system

RSW
EWR
Excellent 8.0

Pros: Boarding was fairly fast and the the flight was on time.

Cons: I can’t complain. Flight wasn’t full so I had the row to myself. That being said, I find the seats are too close together. I am tall and never have enough leg room.

LAS
IAH
Okay 4.6

Pros: Avaiability

Cons: Food

EWR
SJO
Good 7.6

Pros: The food and the crew

Cons: Entertainment system, it is outdated

EWR
MKE
Good 7.3

Pros: Love the movies available on the United app

Cons: The A/C was blowing ice cubes at me, which wasn't the worst because it was pretty warm yesterday, but still it was less than ideal.

Mon, 2 Mar
LHR
London Heathrow
ONT
Ontario
15h 34m
Thu, 12 Mar
ONT
Ontario
LHR
London Heathrow
13h 37m
£6585
Trip: 10 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,094 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
LHR
JTR
Excellent 10.0

Pros: Sarah the Cabin Manager was amazing.

Cons: The business seats are horrible

LHR
ORD
Excellent 10.0

Pros: Service and drinks

LAX
LHR
Excellent 10.0

Cons: Nothing

LHR
WAW
Excellent 8.0

Pros: Information easily available staff friendly

Cons: The seats on the plane are so hard they cut off circulation in my legs . I fly everywhere and never have this issue. Soften up those seats a bit

LHR
DUB
Excellent 10.0

Pros: Quick and Friendly Staff

Cons: Flight was wonderful, landing a little rough

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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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