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Cheap flights from London Heathrow Airport to Ontario from £375

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 18/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ONT
20 Nov — 27 Nov1
1 adult

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 15 November 2024.

Round-trip from

£487

One-way from

£375

Popular in

August

Cheapest in

February
Lufthansa
  • Lufthansa
  • 8/1-13/1
  • 2 total stops
  • 38h 07m total
  • London to Ontario
Search Deals
18/1
  • 18/1
  • 2 total stops
  • 30h 10m total
  • London to Ontario
Search Deals
High demand for flights, 30% potential price rise
Search Deals
Best time to find cheap flights, 21% potential price drop
Search Deals

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 15 November 2024.

Wed 11/1210:05LHR - ONT
1 stop15h 38mUnited Airlines
Tue 24/1206:10ONT - LHR
2 stops21h 05mUnited Airlines
Deal found 14/11£516
Mon 9/1214:30LHR - ONT
1 stop16h 32mKLM
Tue 11/313:30ONT - LHR
1 stop13h 30mKLM
Deal found 14/11£519
Wed 11/1210:45LHR - ONT
1 stop13h 45mDelta
Sun 22/1222:29ONT - LHR
1 stop23h 51mDelta
Deal found 14/11£529
Thu 28/1114:30LHR - ONT
2 stops27h 23mMultiple Airlines
Thu 5/1206:10ONT - LHR
2 stops16h 20mMultiple Airlines
Deal found 14/11£547
Thu 5/1213:50LHR - ONT
1 stop16h 23mIberia
Thu 12/1210:41ONT - LHR
1 stop12h 39mIberia
Deal found 14/11£550
Mon 9/1210:05LHR - ONT
1 stop15h 38mLufthansa
Thu 23/106:15ONT - LHR
1 stop17h 10mLufthansa
Deal found 14/11£558
Sat 7/1210:40LHR - ONT
1 stop19h 33mBritish Airways
Tue 10/1216:25ONT - LHR
1 stop12h 55mBritish Airways
Deal found 14/11£561
Fri 13/1208:20LHR - ONT
2 stops18h 07mAmerican Airlines
Mon 23/1216:25ONT - LHR
1 stop12h 55mAmerican Airlines
Deal found 14/11£639
Mon 9/1214:30LHR - ONT
1 stop15h 33mFinnair
Fri 13/1210:41ONT - LHR
1 stop12h 39mFinnair
Deal found 14/11£666
Sat 14/1210:45LHR - ONT
1 stop20h 16mVirgin Atlantic
Sat 21/1212:00ONT - LHR
2 stops39h 55mVirgin Atlantic
Deal found 14/11£706

Find flights from Heathrow to Ontario within your budget

Customise 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 943,810 searches. Data last updated 15 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 8/1

09:20-21:57

1 stop20h 37m

Ontario

Mon 13/1

06:00-07:30

1 stop17h 30m

£487

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 8/1

10:45-16:28

1 stop13h 43m

Ontario

Wed 22/1

13:00-10:35

1 stop13h 35m

£491

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 21/4

10:35-18:00

1 stop15h 25m

Ontario

Tue 29/4

10:40-10:25

1 stop15h 45m

£501

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 4/3

13:50-22:00

1 stop16h 10m

Ontario

Wed 2/4

08:52-06:25

1 stop13h 33m

£513

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 17/2

11:50-21:02

1 stop17h 12m

Ontario

Sun 23/2

22:50-07:00

1 stop24h 10m

£524

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/12

15:50-22:42

1 stop14h 52m

Ontario

Mon 23/12

05:30-10:00

1 stop20h 30m

£529

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 13/1

10:40-18:37

1 stop15h 57m

Ontario

Thu 23/1

14:44-12:05

1 stop13h 21m

£538

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 28/11

14:30-09:53

2 stops27h 23m

Ontario

Thu 5/12

06:10-06:30

2 stops16h 20m

£547

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 23/3

15:00-20:17

2 stops36h 17m

Ontario

Sat 3/5

05:45-10:00

2 stops20h 15m

£566

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 13/12

08:20-18:27

2 stops18h 07m

Ontario

Mon 23/12

16:25-13:20

1 stop12h 55m

£639

Flights are sorted by cheapest first

Deals found on 13/11

Showing 1-10 of 23 results
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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 return 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 return flight from Heathrow to Ontario. Price data was last updated on 8 November 2024.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Ontario, you should look to book at least 25 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Ontario (average of £514). Flying from London Heathrow Airport to Ontario in August is currently the most expensive (average of £827). 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 15 November 2024.

It’s optimal to fly from London Heathrow Airport to Ontario in the afternoon. By choosing this option you can save up to 25% on the cost of your flight, compared to a flight at midday.

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 3.0 - 86.0 inches per month. February is typically the wettest month, when rainfall can reach 86.0 mm. June is typically the driest time to visit Ontario when rainfall is around 3.0 mm.

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 26.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 12.0 C).

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 15 November 2024.
Read through reviews of airlines operating flights from London to Ontario, such as Lufthansa, KLM and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
8,786 reviews
Check prices

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

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
8,786 reviews
Delta
8.0
Very Good
8,786 reviews
Check prices

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

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
8,786 reviews
Check prices

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

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
1,304 reviews
Delta
8.0
Very Good
8,786 reviews
Check prices

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 10

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

Virgin Atlantic
7.6
Good
662 reviews
Delta
8.0
Very Good
8,786 reviews
Check prices

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 10

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

JetBlue
7.5
Good
3,434 reviews
Delta
8.0
Very Good
8,786 reviews
Check prices

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

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?

    If you book a flight to Ontario from London Heathrow, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario. There are 0 flights from London Heathrow to Ontario per day from 5 different airlines.

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

    Currently priced at £487, Lufthansa will fly you from London Heathrow Airport to Ontario and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from KLM and United Airlines - these airlines can fly you to your destination from £491 and £501, respectively. Users have found that Lufthansa is 16% cheaper than the other options available to this destination.

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

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at £532. Lufthansa flights start at £540 while deals on Finnair start at £571 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 holiday 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Ontario (average of £514). Flying from London Heathrow Airport to Ontario in August is currently the most expensive (average of £827). 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.

See more FAQs

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Alternative routes for Heathrow to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Heathrow to Ontario

Discover the top 5 airlines that operate flights from Heathrow to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 943,810 searches. Data last updated 15 November 2024.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£391Average£529FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£401Average£604FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£432Average£517FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£478Average£545FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£530Average£741FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Ontario?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Ontario?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Heathrow to Ontario for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Heathrow to Ontario with no change fees?

Yes! Cheapflights helps users easily find flights from Heathrow to Ontario with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Ontario become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Ontario flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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