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Ontario

$466+ 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ONT
Jan 28 — Feb 41
Tue 1/28
Tue 2/4
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 Wednesday

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 January 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$493
(The Travel House)

One-way from

$466
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$692
Provider with most accurate pricing for London Heathrow-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for London Heathrow-Ontario flights.
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From London Heathrow to Ontario
Search Deals
One-way flight from London Heathrow to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($65 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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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 January 23, 2025.

This The Travel House deal was found by Cheapflights users on 1/22. 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 5/57:25 amLHR - ONT
2 stops39h 44mLufthansa
Sun 5/114:15 pmONT - LHR
1 stop33h 25mLufthansa
Deal found 1/22$493
This United Airlines deal was found by Cheapflights users on 1/22. 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 3/59:30 amLHR - ONT
2 stops19h 10mUnited Airlines
Wed 3/1210:38 amONT - LHR
1 stop13h 47mUnited Airlines
Deal found 1/22$498
This TravelUp deal was found by Cheapflights users on 1/22. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/126:30 amLHR - ONT
2 stops17h 12mKLM
Tue 3/187:00 amONT - LHR
1 stop20h 35mKLM
Deal found 1/22$505
This TravelUp deal was found by Cheapflights users on 1/22. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/126:20 amLHR - ONT
2 stops23h 02mVirgin Atlantic
Tue 3/181:30 pmONT - LHR
2 stops34h 35mVirgin Atlantic
Deal found 1/22$509
This The Travel House deal was found by Cheapflights users on 1/22. 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.
Wed 2/191:50 pmLHR - ONT
1 stop16h 26mFinnair
Mon 2/242:54 pmONT - LHR
1 stop13h 11mFinnair
Deal found 1/22$516
This Lufthansa deal was found by Cheapflights users on 1/22. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/86:30 amLHR - ONT
2 stops19h 49mMultiple Airlines
Wed 2/125:10 amONT - LHR
1 stop20h 30mMultiple Airlines
Deal found 1/22$533
This Booking.com deal was found by Cheapflights users on 1/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/112:30 pmLHR - ONT
1 stop14h 30mBritish Airways
Tue 3/2510:57 amONT - LHR
1 stop13h 23mBritish Airways
Deal found 1/23$543
This TravelUp deal was found by Cheapflights users on 1/22. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/55:40 pmLHR - ONT
2 stops26h 58mAir Canada
Sun 5/114:15 pmONT - LHR
2 stops30h 20mAir Canada
Deal found 1/22$562
This Iberia deal was found by Cheapflights users on 1/22. 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.
Tue 2/41:50 pmLHR - ONT
1 stop16h 55mIberia
Sun 2/162:54 pmONT - LHR
1 stop13h 11mIberia
Deal found 1/22$579
This American Airlines deal was found by Cheapflights users on 1/23. 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.
Mon 2/108:20 amLHR - ONT
1 stop18h 17mAmerican Airlines
Sun 2/162:54 pmONT - LHR
1 stop13h 11mAmerican Airlines
Deal found 1/23$583
This Delta deal was found by Cheapflights users on 1/22. 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.
Fri 2/218:40 amLHR - ONT
2 stops22h 12mDelta
Fri 2/281:05 pmONT - LHR
1 stop13h 30mDelta
Deal found 1/22$600

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 2,558,603 searches. Data last updated January 23, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 5/5

7:25 am-3:09 pm

2 stops39h 44m

Ontario

Sun 5/11

4:15 pm-9:40 am

1 stop33h 25m

$493

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 3/5

9:30 am-8:40 pm

2 stops19h 10m

Ontario

Wed 3/12

10:38 am-7:25 am

1 stop13h 47m

$498

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 3/12

6:30 am-4:42 pm

2 stops17h 12m

Ontario

Tue 3/18

7:00 am-10:35 am

1 stop20h 35m

$505

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 3/12

6:20 am-10:22 pm

2 stops23h 02m

Ontario

Tue 3/18

1:30 pm-7:05 am

2 stops34h 35m

$509

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 2/19

1:50 pm-10:16 pm

1 stop16h 26m

Ontario

Mon 2/24

2:54 pm-12:05 pm

1 stop13h 11m

$516

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 2/8

6:30 am-6:19 pm

2 stops19h 49m

Ontario

Wed 2/12

5:10 am-9:40 am

1 stop20h 30m

$533

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 3/11

2:30 pm-10:00 pm

1 stop14h 30m

Ontario

Tue 3/25

10:57 am-7:20 am

1 stop13h 23m

$543

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 5/5

5:40 pm-12:38 pm

2 stops26h 58m

Ontario

Sun 5/11

4:15 pm-6:35 am

2 stops30h 20m

$562

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 2/4

1:50 pm-10:45 pm

1 stop16h 55m

Ontario

Sun 2/16

2:54 pm-12:05 pm

1 stop13h 11m

$579

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 2/10

8:20 am-6:37 pm

1 stop18h 17m

Ontario

Sun 2/16

2:54 pm-12:05 pm

1 stop13h 11m

$583

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/23

Showing 1-10 of 25 results
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2
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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 January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-Ontario flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 January 17, 2025.

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, August is the cheapest month in which you can book a flight from London Heathrow Airport to Ontario (average of $246). Flying from London Heathrow Airport to Ontario in March is currently the most expensive (average of $310). 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 January 23, 2025.

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 January 23, 2025.
Read through reviews of airlines operating flights from London to Ontario, such as Iberia, KLM and United Airlines. 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
8,512 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

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
8,512 reviews
Delta
8.0
Very good
8,512 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

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
1,338 reviews
Delta
8.0
Very good
8,512 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

Reviews

1 / 10

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

Finnair
7.6
Good
1,286 reviews
Delta
8.0
Very good
8,512 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

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
8,512 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

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
1,489 reviews
Delta
8.0
Very good
8,512 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

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 Lufthansa is currently your cheapest option to Ontario, with prices starting at $493. Additional round-trip tickets that might be worth considering are offered by United Airlines and KLM, with the lowest prices starting at $498 and $505, respectively. These flights start at 33% 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 $574. Finnair flights start at $628 while deals on Iberia start at $676 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to Ontario (average of $246). Flying from London Heathrow Airport to Ontario in March is currently the most expensive (average of $310). 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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