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Cheap flights from London to Ontario from £224

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 29/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YYZ
3 May — 10 May1
1 adult

Cheap flight deals from London to Ontario

Keep the following information in mind while searching for London to Ontario flight deals. Data was last updated 28 April 2025.

Round-trip from

£329

One-way from

£224

Popular in

August

Cheapest in

February

Average price

£409

Good round-trip deal

£344 or less

Good one-way deal

£247 or less
Air Canada
  • Air Canada
  • 12/6-19/6
  • 2 total stops
  • 34h 35m total
  • London to Ontario
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29/6
  • 29/6
  • 2 total stops
  • 32h 25m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£46 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to Ontario.
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Price to beat on a one-way flight from London (LON) to Ontario.
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Find flight deals from London to Ontario

Cheapest flights from London to Ontario
Explore the most affordable flight options available from London to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 April 2025.

Thu 12/608:40LHR - YYZ
1 stop12h 45mAir Canada
Thu 19/618:10YYZ - LHR
1 stop21h 50mAir Canada
Deal found 28/4£329
Thu 3/711:35LGW - YTZ
1 stop13h 22mAir Transat
Mon 14/718:55YTZ - LGW
1 stop9h 55mAir Transat
Deal found 28/4£330
Fri 30/511:35LGW - YYZ
1 stop10h 50mAir Transat
Fri 6/618:00YYZ - LGW
1 stop10h 50mAir Transat
Deal found 28/4£330
Sat 21/607:30LHR - YYZ
1 stop13h 50mLufthansa
Mon 30/616:00YYZ - LHR
1 stop9h 30mLufthansa
Deal found 28/4£331
Mon 9/619:50LTN - YYZ
1 stop23h 20mMultiple Airlines
Mon 16/622:15YYZ - LTN
1 stop13h 40mMultiple Airlines
Deal found 26/4£332
Fri 20/608:40LHR - YTZ
2 stops14h 06mAir Canada
Tue 1/718:25YTZ - LHR
1 stop10h 35mAir Canada
Deal found 28/4£332
Mon 23/606:50LHR - YYZ
1 stop9h 50mMultiple Airlines
Fri 4/720:20YYZ - LHR
1 stop8h 40mMultiple Airlines
Deal found 28/4£334
Thu 12/606:50LHR - YTZ
2 stops15h 00mMultiple Airlines
Thu 19/612:25YTZ - LHR
2 stops14h 30mMultiple Airlines
Deal found 28/4£335
Mon 9/622:00STN - YYZ
1 stop21h 10mMultiple Airlines
Mon 16/622:15YYZ - STN
1 stop10h 45mMultiple Airlines
Deal found 28/4£335
Mon 5/507:40LHR - YYZ
1 stop13h 00mBritish Airways
Mon 19/522:00YYZ - LHR
Nonstop7h 15mBritish Airways
Deal found 28/4£339
Tue 16/915:40LGW - YYZ
1 stop11h 15mIcelandair
Wed 24/923:00YYZ - LGW
1 stop10h 40mIcelandair
Deal found 28/4£341
Wed 11/608:45LCY - YYZ
1 stop16h 00mMultiple Airlines
Mon 16/621:10YYZ - LCY
1 stop16h 25mMultiple Airlines
Deal found 28/4£341

Cheapflights Fare Finder

Customise your flight search to find flights from London 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 858,174 searches. Data last updated 28 April 2025.
Use the filters below to find and compare flights from London to Ontario that are best for you.

Fly from

London

Fly to

Ontario

Route

Depart

Return

Price

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 12/6

08:40-16:25

1 stop12h 45m

Toronto Pearson Intl

Thu 19/6

18:10-21:00

1 stop21h 50m

£329

LondonToronto

LGW - YTZ

LGWYTZ

London Gatwick

Thu 3/7

11:35-19:57

1 stop13h 22m

Toronto Island

Mon 14/7

18:55-09:50

1 stop9h 55m

£330

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Fri 30/5

11:35-17:25

1 stop10h 50m

Toronto Pearson Intl

Fri 6/6

18:00-09:50

1 stop10h 50m

£330

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Sat 21/6

07:30-16:20

1 stop13h 50m

Toronto Pearson Intl

Mon 30/6

16:00-06:30

1 stop9h 30m

£331

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Mon 9/6

19:50-14:10

1 stop23h 20m

Toronto Pearson Intl

Mon 16/6

22:15-16:55

1 stop13h 40m

£332

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Fri 20/6

08:40-17:46

2 stops14h 06m

Toronto Island

Tue 1/7

18:25-10:00

1 stop10h 35m

£332

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Mon 23/6

06:50-11:40

1 stop9h 50m

Toronto Pearson Intl

Fri 4/7

20:20-10:00

1 stop8h 40m

£334

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Thu 12/6

06:50-16:50

2 stops15h 00m

Toronto Island

Thu 19/6

12:25-07:55

2 stops14h 30m

£335

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Tue 16/9

15:40-21:55

1 stop11h 15m

Toronto Pearson Intl

Wed 24/9

23:00-14:40

1 stop10h 40m

£341

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Tue 13/5

18:35-16:25

1 stop26h 50m

Toronto Pearson Intl

Sun 18/5

20:15-17:50

1 stop16h 35m

£345

Flights are sorted by cheapest return flights first.

Deals found on 26/4

Showing 1-10 of 60 results
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Best time to book a flight from London to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from London 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.

Cheapflights Insights

Everything you need to know about your flight from London to Ontario

What is the cheapest month to book a flight from London to Region of Ontario?

Currently, January is the cheapest month in which you can book a flight from London to Region of Ontario (average of £490). Flying from London to Region of Ontario in July is currently the most expensive (average of £708). 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 LON to ON?

Find hourly flight availability from London 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 28 April 2025.

When flying from London to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from London to Region of Ontario

Explore weekly flight availability from London to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 28 April 2025.

The most flights from LON to CAON are scheduled on a Tuesday (41 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (36 on average).

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 Region of Ontario ranges from 51.0 - 83.0 inches per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 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 Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 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 28 April 2025.
Read reviews from past customers who have flown Delta, KLM and Air Transat from London to Ontario. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,927 reviews
Check prices

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Delta
8.0
Very Good
7,927 reviews
Delta
8.0
Very Good
7,927 reviews
Check prices

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very Good
7,927 reviews
Check prices

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Air Transat
7.8
Good
385 reviews
Delta
8.0
Very Good
7,927 reviews
Check prices

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Azores Airlines
7.6
Good
66 reviews
Delta
8.0
Very Good
7,927 reviews
Check prices

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Finnair
7.6
Good
1,273 reviews
Delta
8.0
Very Good
7,927 reviews
Check prices

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

Related info for your journey

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

  • What are the cheapest airlines to fly from London to Region of Ontario one-way?

    The cheapet airlines for a one-way flight from London to Region of Ontario are WestJet (£224), Air Transat (£241), and TAP AIR PORTUGAL (£270).

  • What are the most popular routes from London to Region of Ontario?

    The most popular route from London to Region of Ontario is London Heathrow - Toronto Pearson Intl. You may also consider London Gatwick - Toronto Pearson Intl or London Heathrow - Toronto Island.

  • What are the most reliable airlines from London to Region of Ontario?

    The top 3 most reliable airlines when flying from London to Region of Ontario are Croatia Airlines (89%), KLM (88%) and Air France (88%).

  • What are the cheapest flights from London to Region of Ontario?

    The cheapest flight price from London to Region of Ontario is £343. On average you can expect to pay £1,039. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £304.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London 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 to Region of Ontario?

    Currently, January is the cheapest month in which you can book a flight from London to Region of Ontario (average of £490). Flying from London to Region of Ontario in July is currently the most expensive (average of £708). 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 London to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from London to Ontario

Discover the top 10 airlines that operate flights from London 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 858,174 searches. Data last updated 28 April 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£260Average£382FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
LufthansaCheapest£284Average£518FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£287Average£403FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£302Average£712FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Air CanadaCheapest£306Average£488FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£308Average£502FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air TransatCheapest£312Average£504FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Scandinavian AirlinesCheapest£320Average£538FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£329Average£550FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£334Average£514FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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 London to Ontario?

When you search for this flight from London to Ontario, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from London to Ontario for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Certainly. Search results for flights to Ontario from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Of course! You can now track prices for flights from London to Ontario and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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