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Cheap flights from London to Ontario from £246

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YYZ
16 Jul — 23 Jul1
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 11 July 2025.

Round-trip from

£340

One-way from

£246

Popular in

August

Cheapest in

February

Average price

£506

Good round-trip deal

£351 or less

Good one-way deal

£245 or less
Air Transat
  • Air Transat
  • 3/9-25/9
  • 1 total stop
  • 20h 55m total
  • London to Ontario
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Air Transat
  • Air Transat
  • 1/10
  • 1 total stop
  • 16h 57m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£39 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
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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 11 July 2025.

Wed 3/909:40LGW - YYZ
Nonstop8h 05mAir Transat
Thu 25/916:00YYZ - LGW
1 stop12h 50mAir Transat
Deal found 9/7£340
Thu 9/1008:45LTN - YYZ
1 stop10h 25mMultiple Airlines
Fri 17/1023:55YYZ - LTN
1 stop10h 50mMultiple Airlines
Deal found 9/7£341
Thu 4/912:40LGW - YUL
1 stop11h 40mAir Transat
Tue 9/906:45YUL - LGW
1 stop20h 10mAir Transat
Deal found 9/7£341
Thu 9/1008:15STN - YYZ
1 stop10h 55mMultiple Airlines
Fri 17/1023:55YYZ - STN
1 stop11h 40mMultiple Airlines
Deal found 9/7£341
Thu 11/906:00LHR - YYZ
1 stop20h 20mTAP AIR PORTUGAL
Sun 28/917:35YYZ - LHR
1 stop11h 45mTAP AIR PORTUGAL
Deal found 10/7£341
Thu 4/911:35LGW - YTZ
1 stop11h 35mAir Transat
Wed 10/917:30YTZ - LGW
1 stop11h 20mAir Transat
Deal found 10/7£341
Thu 30/1020:35LHR - YYZ
1 stop26h 40mIcelandair
Thu 4/1219:45YYZ - LHR
1 stop10h 05mIcelandair
Deal found 10/7£342
Thu 23/1006:00LHR - YYZ
1 stop15h 25mSWISS
Tue 28/1014:00YYZ - LHR
2 stops14h 05mSWISS
Deal found 9/7£343
Tue 2/915:40LGW - YYZ
1 stop11h 15mIcelandair
Sat 6/920:50YYZ - LGW
1 stop9h 55mIcelandair
Deal found 10/7£343
Fri 5/912:05LHR - YYZ
Nonstop8h 10mAir Canada
Tue 9/906:30YYZ - LHR
1 stop9h 30mAir Canada
Deal found 9/7£344
Thu 4/909:30LHR - YUL
Nonstop7h 10mAir Canada
Tue 9/921:55YUL - LHR
Nonstop6h 40mAir Canada
Deal found 9/7£346
Fri 26/907:30LHR - YYZ
1 stop13h 50mLufthansa
Wed 8/1018:20YYZ - LHR
1 stop13h 20mLufthansa
Deal found 10/7£347

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 11 July 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

LGW - YYZ

LGWYYZ

London Gatwick

Wed 3/9

09:40-12:45

Nonstop8h 05m

Toronto Pearson Intl

Fri 12/9

22:45-10:45

Nonstop7h 00m

£340

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Thu 9/10

08:45-14:10

1 stop10h 25m

Toronto Pearson Intl

Fri 17/10

23:55-15:45

1 stop10h 50m

£341

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Thu 4/9

12:40-19:20

1 stop11h 40m

Montreal Pierre Elliott Trudeau Intl

Tue 9/9

06:45-07:55

1 stop20h 10m

£341

LondonToronto

STN - YYZ

STNYYZ

London Stansted

Thu 9/10

08:15-14:10

1 stop10h 55m

Toronto Pearson Intl

Fri 17/10

23:55-16:35

1 stop11h 40m

£341

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 11/9

06:00-21:20

1 stop20h 20m

Toronto Pearson Intl

Sun 28/9

17:35-10:20

1 stop11h 45m

£341

LondonToronto

LGW - YTZ

LGWYTZ

London Gatwick

Thu 4/9

11:35-18:10

1 stop11h 35m

Toronto Island

Wed 10/9

17:30-09:50

1 stop11h 20m

£341

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Tue 2/9

15:40-21:55

1 stop11h 15m

Toronto Pearson Intl

Mon 22/9

20:50-14:35

1 stop12h 45m

£343

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Fri 5/9

12:05-15:15

Nonstop8h 10m

Toronto Pearson Intl

Tue 9/9

06:30-21:00

1 stop9h 30m

£344

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Thu 4/9

09:30-11:40

Nonstop7h 10m

Montreal Pierre Elliott Trudeau Intl

Tue 9/9

21:55-09:35

Nonstop6h 40m

£346

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Fri 26/9

07:30-16:20

1 stop13h 50m

Toronto Pearson Intl

Wed 8/10

18:20-12:40

1 stop13h 20m

£347

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 55 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 11 July 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 11 July 2025.

The most flights from LON to CAON are scheduled on a Thursday (43 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (31 on average).

How much does it cost for a return flight from London to Region of Ontario?

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 11 July 2025.
Read reviews from past customers who have flown with Delta, KLM, andAir Transat from London to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very Good
7,951 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,372 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Transat
7.8
Good
412 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,467 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,655 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 Air Transat (£246), WestJet (£253), and TAP AIR PORTUGAL (£263).

  • 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 City - Toronto Pearson Intl.

  • 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 Thai Airways (92%), Ethiopian Air (90%) and Air Canada (86%).

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

    The cheapest flight price from London to Region of Ontario is £340. On average you can expect to pay £1,365. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £330.

  • 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

Browse thousands of different options on Cheapflights for your next trip

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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.
Heathrow to Pearson Intl flights
Heathrow to Vancouver Intl flights
Gatwick to Pearson Intl flights
Gatwick to Vancouver Intl flights
London City to Pearson Intl flights
Heathrow to Toronto Island flights
Heathrow to Calgary flights
London City to Vancouver Intl flights
Stansted to Pearson Intl flights
Luton to Pearson Intl flights
Gatwick to Toronto Island flights
Heathrow to Abbotsford flights
Heathrow to Pierre Elliott Trudeau Intl flights
Manchester to Pearson Intl flights
Gatwick to Calgary flights
Gatwick to Abbotsford flights
Luton to Vancouver Intl flights
London City to Calgary flights
Stansted to Vancouver Intl flights
Gatwick to Pierre Elliott Trudeau Intl flights
Manchester to Toronto Island flights
Manchester to Vancouver Intl flights
Heathrow to Halifax flights
Edinburgh to Pearson Intl flights
London City to Pierre Elliott Trudeau Intl flights
Heathrow to Ottawa flights
Edinburgh to Thunder Bay flights
Manchester to Edmonton flights
Southend to Pearson Intl flights
Luton to Calgary flights
Stansted to Calgary flights
Luton to Pierre Elliott Trudeau Intl flights
Birmingham to Pearson Intl flights
Heathrow to Edmonton flights
Manchester to Abbotsford flights
Edinburgh to Toronto Island flights
Stansted to Pierre Elliott Trudeau Intl flights
Edinburgh to Vancouver Intl flights
Manchester to Calgary flights
Birmingham to Toronto Island flights
Gatwick to Edmonton flights
Edinburgh to Calgary flights
Birmingham to Vancouver Intl flights
Gatwick to Ottawa flights
Heathrow to Winnipeg flights
London City to Ottawa flights
Gatwick to Halifax flights

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 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£255Average£307FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
IcelandairCheapest£282Average£352FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£288Average£503FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
LufthansaCheapest£295Average£468FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air TransatCheapest£297Average£438FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air CanadaCheapest£301Average£506FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£302Average£493FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
TAP AIR PORTUGALCheapest£311Average£532FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£314Average£520FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
American AirlinesCheapest£317Average£597FlexibilityNo cancel feeOn-time71%
Search American 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 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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