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$425+ Cheap flights from Heathrow (LHR) to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ONT
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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The best prices from London Heathrow to Ontario are usually found in February or September, booked 25 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Heathrow to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 21, 2024.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Popular in

August

Cheapest in

February

Round-trip from

$561
(Expedia)

One-way from

$425
(Combigo)
Provider with most accurate pricing for London Heathrow-Ontario flight deals.
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Provider most trusted by Cheapflights users for London Heathrow-Ontario flights.
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High demand for flights, 30% potential price rise
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Best time to find cheap flights, 21% potential price drop
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From London Heathrow to Ontario
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One-way flight from London Heathrow to Ontario
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Find flight deals from Heathrow to Ontario

Cheapest flights from Heathrow to Ontario
Explore the most affordable flight options available from Heathrow to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2024.

This Expedia deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/48:00 pmLHR - ONT
2 stops34h 13mMultiple Airlines
Tue 12/106:05 amONT - LHR
1 stop19h 35mMultiple Airlines
Deal found 11/20$561
This Delta deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/46:20 amLHR - ONT
2 stops18h 25mDelta
Tue 12/106:00 amONT - LHR
2 stops17h 05mDelta
Deal found 11/20$566
This United Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/111:45 pmLHR - ONT
1 stop18h 13mUnited Airlines
Tue 12/246:10 amONT - LHR
2 stops21h 05mUnited Airlines
Deal found 11/20$647
This Air France deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1010:45 amLHR - ONT
1 stop13h 45mAir France
Tue 1/141:00 pmONT - LHR
1 stop13h 35mAir France
Deal found 11/19$655
This KLM deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/92:30 pmLHR - ONT
1 stop16h 32mKLM
Tue 1/211:00 pmONT - LHR
1 stop13h 35mKLM
Deal found 11/20$656
This Iberia deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/61:50 pmLHR - ONT
1 stop16h 23mIberia
Tue 12/1010:42 amONT - LHR
1 stop12h 38mIberia
Deal found 11/20$694
This American Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/118:20 amLHR - ONT
2 stops18h 07mAmerican Airlines
Mon 12/234:25 pmONT - LHR
1 stop12h 55mAmerican Airlines
Deal found 11/20$699
This TravelJunction deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelJunction is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/101:45 pmLHR - ONT
1 stop18h 13mLufthansa
Wed 1/156:15 amONT - LHR
1 stop17h 10mLufthansa
Deal found 11/19$720
This Netflights deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/108:20 amLHR - ONT
1 stop21h 53mBritish Airways
Tue 12/177:16 amONT - LHR
1 stop15h 04mBritish Airways
Deal found 11/19$764
This The Travel House deal was found by Cheapflights users on 11/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/911:50 amLHR - ONT
1 stop16h 50mFinnair
Fri 12/1310:41 amONT - LHR
1 stop12h 39mFinnair
Deal found 11/21$798
This Justfly.com deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/131:00 pmLHR - ONT
2 stops42h 58mAir Canada
Tue 12/241:42 pmONT - LHR
2 stops32h 48mAir Canada
Deal found 11/20$807

Find flights from Heathrow to Ontario within your budget

Customize your flight search to find flights from Heathrow to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,629,791 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 12/4

8:00 pm-10:13 pm

2 stops34h 13m

Ontario

Tue 12/10

6:05 am-9:40 am

1 stop19h 35m

$561

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 12/4

6:20 am-4:45 pm

2 stops18h 25m

Ontario

Tue 12/10

6:00 am-7:05 am

2 stops17h 05m

$566

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 3/18

10:05 am-6:04 pm

1 stop14h 59m

Ontario

Tue 3/25

1:40 pm-9:40 am

1 stop13h 00m

$615

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 1/27

1:15 pm-10:32 pm

1 stop17h 17m

Ontario

Mon 2/3

1:00 pm-10:35 am

1 stop13h 35m

$619

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 1/14

10:45 am-4:28 pm

1 stop13h 43m

Ontario

Tue 1/21

1:00 pm-10:35 am

1 stop13h 35m

$621

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 4/28

10:35 am-6:00 pm

1 stop15h 25m

Ontario

Mon 5/5

1:00 pm-9:40 am

1 stop12h 40m

$633

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 12/10

10:45 am-4:30 pm

1 stop13h 45m

Ontario

Tue 1/14

1:00 pm-10:35 am

1 stop13h 35m

$655

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 1/16

1:50 pm-10:16 pm

1 stop16h 26m

Ontario

Thu 1/23

2:44 pm-12:05 pm

1 stop13h 21m

$684

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 2/14

1:50 pm-10:00 pm

1 stop16h 10m

Ontario

Mon 2/24

6:59 am-6:20 am

1 stop15h 21m

$691

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 12/11

8:20 am-6:27 pm

2 stops18h 07m

Ontario

Mon 12/23

4:25 pm-1:20 pm

1 stop12h 55m

$699

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 26 results
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Compare providers for flights from Heathrow to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Ontario in November.
ProviderPrice AccuracyTrust Score*
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London Heathrow Airport-Ontario flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on London Heathrow Airport-Ontario flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London Heathrow Airport-Ontario flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Heathrow to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Heathrow with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Heathrow to Ontario

Get recent, data-driven insights about flights from Heathrow to Ontario including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from London Heathrow Airport to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to Ontario. Price data was last updated on November 15, 2024.

Booking 25 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from London Heathrow Airport to Ontario?

Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Ontario (average of $236). Flying from London Heathrow Airport to Ontario in December is currently the most expensive (average of $298). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to ONT?

Find hourly flight availability from Heathrow to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 21, 2024.

Unlike at noon, when flights are generally more expensive, you can save up to 23% on flights from London Heathrow Airport to Ontario by exploring options for tickets in the afternoon.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated November 21, 2024.
Read through reviews of airlines operating flights from London to Ontario, such as Delta, Lufthansa and KLM. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,758 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,758 reviews
Delta
8.0
Very good
8,758 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,350 reviews
Delta
8.0
Very good
8,758 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair
7.7
Good
1,300 reviews
Delta
8.0
Very good
8,758 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic
7.5
Good
663 reviews
Delta
8.0
Very good
8,758 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France
7.4
Good
1,525 reviews
Delta
8.0
Very good
8,758 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from London Heathrow?

    Ontario (ONT) is the airport you will fly into if you book a flight from London Heathrow to Ontario. You should not have trouble finding flights to Ontario from London Heathrow; the airport handles an average of 0 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Ontario airport from London Heathrow. It is only a 3.1 mi journey from Ontario (ONT) to Ontario’s city center.

  • What are the cheapest airlines flying from London Heathrow Airport to Ontario round-trip?

    Flying on Delta is currently your cheapest option to Ontario, with prices starting at $566. Additional round-trip tickets that might be worth considering are offered by Lufthansa and Virgin Atlantic, with the lowest prices starting at $615 and $619, respectively. These flights start at 23% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from London Heathrow Airport to Ontario one-way?

    To fly one-way, consider booking your trip with Lufthansa, which is currently one of the cheapest options available, starting at $664. Air Canada flights start at $665 while deals on United Airlines start at $673 one-way.

  • Can I find deals for flights from Heathrow to Ontario that include hotel bookings?

    Yes. In addition to deals on Heathrow to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Ontario.

  • Can I find deals for business class flights from Heathrow to Ontario?

    Yes. Cheapflights offers flight deals from Heathrow to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to Ontario?

    Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Ontario (average of $236). Flying from London Heathrow Airport to Ontario in December is currently the most expensive (average of $298). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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