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Cheap flights from London to Ontario from £276

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 19/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YYZ
27 Dec — 3 Jan1
1 adult
1 adult, Economy, 0 bags

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 27 November 2025.

Thu 27/1109:00LHR - YYZ
1 stop12h 10mAir Canada
Thu 11/1220:25YYZ - LHR
Nonstop7h 05mAir Canada
Deal found 25/11£394
Wed 26/1113:00LHR - YYZ
Nonstop8h 00mAir Canada
Wed 10/1223:00YYZ - LHR
Nonstop7h 20mAir Canada
Deal found 25/11£395
Fri 5/1211:40LGW - YYZ
Nonstop8h 20mAir Transat
Mon 8/1221:35YYZ - LGW
Nonstop7h 10mAir Transat
Deal found 25/11£395
Wed 3/1206:50LTN - YYZ
2 stops16h 25mMultiple Airlines
Sun 7/1219:40YYZ - LTN
2 stops21h 20mMultiple Airlines
Deal found 25/11£395
Fri 28/1112:00LHR - YYZ
1 stop13h 46mAir Canada
Sat 6/1223:00YYZ - LHR
Nonstop7h 20mAir Canada
Deal found 25/11£395
Wed 3/1211:10LHR - YYZ
Nonstop8h 10mAir Canada
Wed 10/1223:00YYZ - LHR
Nonstop7h 20mAir Canada
Deal found 26/11£396
Tue 25/1113:45LHR - YYZ
1 stop31h 25mAir Canada
Sun 14/1206:15YYZ - LHR
1 stop9h 20mAir Canada
Deal found 25/11£397
Wed 26/1109:00LHR - YYZ
1 stop12h 10mAir Canada
Sun 7/1200:30YYZ - LHR
1 stop25h 40mAir Canada
Deal found 25/11£398
Tue 2/1211:40LGW - YYZ
Nonstop8h 20mAir Transat
Mon 8/1221:35YYZ - LGW
Nonstop7h 10mAir Transat
Deal found 26/11£398
Fri 5/1206:00LHR - YYZ
1 stop15h 25mSWISS
Tue 9/1218:10YYZ - LHR
Nonstop7h 20mSWISS
Deal found 25/11£398
Tue 2/1218:00LHR - YYZ
Nonstop8h 10mAir Canada
Wed 10/1218:10YYZ - LHR
Nonstop7h 20mAir Canada
Deal found 26/11£399
Tue 25/1117:10LHR - YTZ
2 stops44h 00mMultiple Airlines
Sun 14/1210:25YTZ - LHR
2 stops39h 45mMultiple Airlines
Deal found 25/11£399

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 27 November 2025.

Round-trip from

£387

One-way from

£276

Popular in

December

Cheapest in

February

Average price

£413

Good round-trip deal

£449 or less

Good one-way deal

£375 or less
Air Transat
  • Air Transat
  • 30/4-5/5
  • Nonstop
  • 15h 20m total
  • London to Ontario
Search Deals
KLM
  • KLM
  • 19/1
  • Nonstop
  • 8h 30m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£20 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 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 27 November 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

STN - YYZ

STNYYZ

London Stansted

Thu 12/2

21:30-16:15

2 stops23h 45m

Toronto Pearson Intl

Sun 22/2

19:35-11:05

1 stop10h 30m

£397

LondonToronto

LCY - YYZ

LCYYYZ

London City

Thu 15/1

17:50-15:40

1 stop26h 50m

Toronto Pearson Intl

Mon 19/1

06:00-09:30

2 stops22h 30m

£398

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Fri 1/5

06:00-17:51

2 stops16h 51m

Toronto Island

Mon 11/5

15:35-06:30

1 stop9h 55m

£398

LondonToronto

LCY - YYZ

LCYYYZ

London City

Tue 10/2

10:00-22:42

2 stops17h 42m

Toronto Pearson Intl

Sun 22/2

17:50-08:10

1 stop9h 20m

£400

LondonToronto

LCY - YYZ

LCYYYZ

London City

Thu 12/2

07:45-17:18

2 stops14h 33m

Toronto Pearson Intl

Sun 22/2

17:50-08:50

1 stop10h 00m

£400

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Tue 10/2

13:30-19:45

1 stop11h 15m

Toronto Pearson Intl

Sun 22/2

18:10-06:30

Nonstop7h 20m

£401

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Mon 20/4

06:00-19:52

2 stops18h 52m

Toronto Island

Thu 30/4

15:35-06:30

1 stop9h 55m

£401

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Fri 13/2

05:50-18:15

2 stops17h 25m

Toronto Pearson Intl

Thu 19/2

19:40-20:30

2 stops19h 50m

£402

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Tue 13/1

09:30-16:15

1 stop11h 45m

Toronto Pearson Intl

Wed 21/1

18:10-06:30

Nonstop7h 20m

£404

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Thu 12/2

21:40-16:15

2 stops23h 35m

Toronto Pearson Intl

Sun 22/2

19:35-18:55

1 stop18h 20m

£407

Flights are sorted by cheapest return flights first.

Deals found on 25/11

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, February is the cheapest month in which you can book a flight from London to Region of Ontario (average of £269). Flying from London to Region of Ontario in December is currently the most expensive (average of £386). 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 27 November 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 27 November 2025.

The most flights from LON to CAON are scheduled on a Monday (41 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (22 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 27 November 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
7.8
Good
478 reviews
Check prices

Comfort

7.3

Crew

8.4

Overall

7.8

Entertainment

7.1

Food

6.8

Boarding

7.9

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
7.8
Good
478 reviews
Air Transat
7.8
Good
478 reviews
Check prices

Comfort

7.3

Crew

8.4

Overall

7.8

Entertainment

7.1

Food

6.8

Boarding

7.9

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
675 reviews
Air Transat
7.8
Good
478 reviews
Check prices

Comfort

7.3

Crew

8.4

Overall

7.8

Entertainment

7.1

Food

6.8

Boarding

7.9

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
10,481 reviews
Air Transat
7.8
Good
478 reviews
Check prices

Comfort

7.3

Crew

8.4

Overall

7.8

Entertainment

7.1

Food

6.8

Boarding

7.9

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
7,594 reviews
Air Transat
7.8
Good
478 reviews
Check prices

Comfort

7.3

Crew

8.4

Overall

7.8

Entertainment

7.1

Food

6.8

Boarding

7.9

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
7,539 reviews
Air Transat
7.8
Good
478 reviews
Check prices

Comfort

7.3

Crew

8.4

Overall

7.8

Entertainment

7.1

Food

6.8

Boarding

7.9

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?

    Virgin Atlantic, Air Canada, and Lufthansa can get you from London to Region of Ontario in just under 11h 15m. Your travel time can differ by up to 15h 35m. There are 3543 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 British Airways (£279), KLM (£279), and TAP AIR PORTUGAL (£283).

  • 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 MEA (95%), Egyptair (95%) and Singapore Airlines (95%).

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

    The cheapest flight price from London to Region of Ontario is £278. On average you can expect to pay £1,209. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £323.

  • 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, February is the cheapest month in which you can book a flight from London to Region of Ontario (average of £269). Flying from London to Region of Ontario in December is currently the most expensive (average of £386). 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 27 November 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£263Average£270FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
IcelandairCheapest£294Average£376FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
LufthansaCheapest£304Average£485FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Scandinavian AirlinesCheapest£304Average£461FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Air TransatCheapest£307Average£433FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air CanadaCheapest£309Average£521FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£311Average£507FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Aer LingusCheapest£319Average£514FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£332Average£539FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£336Average£440FlexibilityNo 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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