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Cheap flights from London to Ontario from £233

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 29/11. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YYZ
16 Nov — 23 Nov1
1 adult
1 adult, Economy

Find flight deals from London to Ontario

Enter your travel dates to find the best prices.

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 17 October 2025.

Wed 12/1112:15LHR - YYZ
1 stop11h 00mIcelandair
Tue 18/1119:40YYZ - LHR
1 stop10h 10mIcelandair
Deal found 15/10£348
Wed 12/1112:15LHR - YYZ
1 stop11h 00mIcelandair
Wed 3/1219:40YYZ - LHR
1 stop10h 10mIcelandair
Deal found 15/10£349
Thu 20/1111:55LGW - YYZ
1 stop11h 20mIcelandair
Wed 3/1219:40YYZ - LGW
1 stop10h 15mIcelandair
Deal found 16/10£349
Wed 19/1120:35LHR - YYZ
1 stop26h 40mIcelandair
Wed 3/1219:40YYZ - LHR
1 stop10h 10mIcelandair
Deal found 15/10£350
Thu 20/1112:15LHR - YYZ
1 stop11h 00mIcelandair
Tue 25/1119:40YYZ - LHR
1 stop10h 10mIcelandair
Deal found 16/10£351
Tue 18/1120:35LHR - YYZ
1 stop26h 40mIcelandair
Mon 24/1119:40YYZ - LHR
1 stop18h 50mIcelandair
Deal found 16/10£351
Thu 20/1112:15LHR - YYZ
1 stop11h 00mIcelandair
Wed 3/1219:40YYZ - LHR
1 stop18h 50mIcelandair
Deal found 16/10£352
Wed 19/1109:00LHR - YYZ
1 stop12h 10mMultiple Airlines
Sun 23/1123:00YYZ - LHR
Nonstop7h 20mMultiple Airlines
Deal found 15/10£353
Thu 20/1111:55LGW - YYZ
1 stop11h 20mIcelandair
Thu 11/1219:40YYZ - LGW
1 stop10h 15mIcelandair
Deal found 16/10£354
Sat 6/1211:55LGW - YYZ
1 stop11h 20mIcelandair
Sun 7/1219:40YYZ - LGW
1 stop10h 15mIcelandair
Deal found 16/10£354
Wed 19/1109:00LHR - YTZ
2 stops13h 55mAir Canada
Wed 26/1112:30YTZ - LHR
1 stop13h 40mAir Canada
Deal found 16/10£354
Thu 27/1106:00LHR - YYZ
1 stop13h 45mTAP AIR PORTUGAL
Mon 1/1222:45YYZ - LHR
1 stop13h 45mTAP AIR PORTUGAL
Deal found 15/10£355

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 17 October 2025.

Round-trip from

£348

One-way from

£233

Popular in

December

Cheapest in

February

Average price

£415

Good round-trip deal

£369 or less

Good one-way deal

£275 or less
Icelandair
  • Icelandair
  • 12/11-18/11
  • 2 total stops
  • 21h 10m total
  • London to Ontario
Search Deals
29/11
  • 29/11
  • 1 total stop
  • 33h 25m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£14 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 October 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to Ontario.
Search Deals
Price to beat on a one-way flight from London (LON) to Ontario.
Search Deals

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 17 October 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 - YTZ

LHRYTZ

London Heathrow

Tue 2/12

09:00-17:55

2 stops13h 55m

Toronto Island

Sun 7/12

08:50-07:10

2 stops17h 20m

£372

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Sun 9/11

11:40-18:25

1 stop11h 45m

Montreal Pierre Elliott Trudeau Intl

Tue 18/11

14:30-09:45

1 stop14h 15m

£375

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Wed 12/11

11:40-18:25

1 stop11h 45m

Montreal Pierre Elliott Trudeau Intl

Thu 20/11

14:30-09:45

1 stop14h 15m

£375

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Sun 9/11

11:40-18:25

1 stop11h 45m

Montreal Pierre Elliott Trudeau Intl

Thu 20/11

14:30-09:45

1 stop14h 15m

£375

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Tue 11/11

11:40-18:25

1 stop11h 45m

Montreal Pierre Elliott Trudeau Intl

Tue 18/11

14:30-09:45

1 stop14h 15m

£375

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Wed 12/11

20:35-18:15

1 stop26h 40m

Toronto Pearson Intl

Sun 23/11

19:40-10:50

1 stop10h 10m

£377

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Wed 5/11

19:25-16:55

2 stops26h 30m

Toronto Island

Tue 11/11

10:30-07:10

1 stop15h 40m

£379

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Thu 19/3

11:40-09:20

1 stop25h 40m

Montreal Pierre Elliott Trudeau Intl

Mon 23/3

10:15-09:45

1 stop19h 30m

£379

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Sat 15/11

06:00-16:55

2 stops15h 55m

Toronto Island

Thu 20/11

10:25-20:35

2 stops29h 10m

£380

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Sun 30/11

08:30-19:40

1 stop16h 10m

Montreal Pierre Elliott Trudeau Intl

Sun 7/12

21:40-18:35

1 stop15h 55m

£381

Flights are sorted by cheapest return flights first.

Deals found on 15/10

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, March is the cheapest month in which you can book a flight from London to Region of Ontario (average of £258). Flying from London to Region of Ontario in December is currently the most expensive (average of £351). 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 17 October 2025.

When flying from London to Region of Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 22% versus a flight at midday.

What is the cheapest day to fly from London to Region of Ontario?

Use this chart to determine the cheapest time to fly return from London to Ontario. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London to Region of Ontario flight should consider departing on Monday afternoons when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 17 October 2025.

The most flights from LON to CAON are scheduled on a Friday (41 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (32 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 17 October 2025.
Read reviews from past customers who have flown with Air Transat, Virgin Atlantic, andAir Canada from London to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Transat
7.7
Good
461 reviews
Check prices

Food

6.7

Boarding

7.9

Entertainment

7.0

Overall

7.7

Comfort

7.3

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Air Transat
7.7
Good
461 reviews
Air Transat
7.7
Good
461 reviews
Check prices

Food

6.7

Boarding

7.9

Entertainment

7.0

Overall

7.7

Comfort

7.3

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Virgin Atlantic
7.5
Good
670 reviews
Air Transat
7.7
Good
461 reviews
Check prices

Food

6.7

Boarding

7.9

Entertainment

7.0

Overall

7.7

Comfort

7.3

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Air Canada
7.1
Good
10,307 reviews
Air Transat
7.7
Good
461 reviews
Check prices

Food

6.7

Boarding

7.9

Entertainment

7.0

Overall

7.7

Comfort

7.3

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Lufthansa
6.8
Okay
7,497 reviews
Air Transat
7.7
Good
461 reviews
Check prices

Food

6.7

Boarding

7.9

Entertainment

7.0

Overall

7.7

Comfort

7.3

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
British Airways
6.7
Okay
7,457 reviews
Air Transat
7.7
Good
461 reviews
Check prices

Food

6.7

Boarding

7.9

Entertainment

7.0

Overall

7.7

Comfort

7.3

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.

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.

  • How long is the flight from London to Region of Ontario?

    Air Canada, Air Transat, and Icelandair can get you from London to Region of Ontario in just under 11h 45m. Your travel time can differ by up to 14h 55m. There are 3258 mi between London and Region of Ontario. This flight may include one or multiple stops.

  • 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 TAP AIR PORTUGAL (£265), British Airways (£267), and Air Transat (£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 Ethiopian Air (81%), Thai Airways (80%) and KLM (80%).

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

    The cheapest flight price from London to Region of Ontario is £268. On average you can expect to pay £1,055. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £326.

  • 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, March is the cheapest month in which you can book a flight from London to Region of Ontario (average of £258). Flying from London to Region of Ontario in December is currently the most expensive (average of £351). 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 17 October 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£258Average£266FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
IcelandairCheapest£287Average£359FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
LufthansaCheapest£299Average£481FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Scandinavian AirlinesCheapest£299Average£449FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Air TransatCheapest£302Average£424FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air CanadaCheapest£304Average£513FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£306Average£499FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
TAP AIR PORTUGALCheapest£307Average£529FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Aer LingusCheapest£313Average£509FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£329Average£434FlexibilityNo 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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