Find flights
Deals
When to book
FAQs

Cheap flights from Ontario to London from £200

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 13/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
1 Jan — 8 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to London

Keep the following information in mind while searching for Ontario to London flight deals. Data was last updated 2 December 2025.

Round-trip from

£423

One-way from

£200

Popular in

December

Cheapest in

February

Average price

£644

Good round-trip deal

£442 or less

Good one-way deal

£269 or less
1/3-7/3
  • 1/3-7/3
  • 4 total stops
  • 44h 25m total
  • Ontario to London
Search Deals
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 13/4
  • 1 total stop
  • 20h 05m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£26 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ontario to London (LON).
Search Deals
Price to beat on a one-way flight from Ontario to London (LON).
Search Deals

Find flight deals from Ontario to London

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to London
Explore the most affordable flight options available from Ontario to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 December 2025.

Tue 2/1221:35YYZ - LGW
Nonstop7h 10mAir Transat
Sun 7/1211:40LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 29/11£429
Fri 12/1221:35YYZ - LGW
Nonstop7h 10mAir Transat
Tue 17/311:40LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 1/12£429
Tue 2/1221:35YYZ - LGW
Nonstop7h 10mAir Transat
Sat 21/211:40LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 1/12£432
Tue 9/1221:35YYZ - LGW
Nonstop7h 10mPorter Airlines
Wed 14/111:40LGW - YYZ
Nonstop8h 20mPorter Airlines
Deal found 30/11£435
Fri 12/1221:35YYZ - LGW
Nonstop7h 10mAir Transat
Fri 20/311:40LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 1/12£437
Tue 2/1221:35YYZ - LGW
Nonstop7h 10mAir Transat
Sat 6/1211:40LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 28/11£439
Mon 1/1221:35YYZ - LGW
Nonstop7h 10mAir Transat
Sun 7/1211:40LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 29/11£440
Mon 1/1221:35YYZ - LGW
Nonstop7h 10mAir Transat
Sat 6/1211:40LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 29/11£442
Sat 13/1210:58YYZ - LHR
2 stops15h 02mAmerican Airlines
Sun 11/117:00LHR - YYZ
1 stop21h 49mAmerican Airlines
Deal found 29/11£444
Wed 3/1221:35YYZ - LGW
Nonstop7h 10mAir Transat
Sat 6/1211:40LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 29/11£444
Tue 30/1212:34YYZ - LHR
1 stop14h 16mAmerican Airlines
Mon 12/110:35LHR - YYZ
2 stops15h 48mAmerican Airlines
Deal found 1/12£445
Wed 10/1216:12YYZ - LHR
1 stop10h 38mAmerican Airlines
Mon 12/114:45LHR - YYZ
1 stop12h 57mAmerican Airlines
Deal found 1/12£447

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ontario to London 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 2 December 2025.
Use the filters below to find and compare flights from Ontario to London that are best for you.

Fly from

Ontario

Fly to

London

Route

Depart

Return

Price

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Tue 5/5

20:45-11:55

1 stop10h 10m

London Heathrow

Wed 13/5

13:05-22:10

1 stop14h 05m

£423

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Wed 14/1

19:55-20:35

1 stop19h 40m

London Stansted

Sat 24/1

08:15-11:50

1 stop32h 35m

£427

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Sat 31/1

19:55-11:20

1 stop10h 25m

London Luton

Sat 7/2

09:05-11:50

1 stop31h 45m

£432

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Sat 28/2

19:55-17:00

1 stop16h 05m

London Luton

Sat 7/3

18:50-11:50

1 stop22h 00m

£434

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Wed 18/2

21:00-18:10

1 stop16h 10m

London Stansted

Wed 25/2

06:30-14:50

1 stop13h 20m

£434

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 3/5

17:30-10:20

1 stop11h 50m

London Heathrow

Mon 11/5

11:20-21:05

1 stop14h 45m

£441

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Tue 24/2

12:05-09:20

2 stops16h 15m

London Heathrow

Tue 3/3

17:30-15:40

2 stops27h 10m

£443

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Tue 13/1

15:30-10:05

2 stops13h 35m

London Heathrow

Tue 20/1

09:00-17:55

2 stops13h 55m

£446

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 16/2

19:40-10:55

1 stop10h 15m

London Gatwick

Thu 12/3

11:55-19:15

1 stop11h 20m

£447

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Tue 17/2

19:40-10:55

1 stop10h 15m

London Gatwick

Wed 11/3

11:55-19:15

1 stop11h 20m

£447

Flights are sorted by cheapest return flights first.

Deals found on 29/11

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Ontario to London

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

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

Currently, March is the cheapest month in which you can book a flight from Region of Ontario to London (average of £309). Flying from Region of Ontario to London in July is currently the most expensive (average of £451). 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 ON to LON?

Find hourly flight availability from Ontario to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 December 2025.

One of the essential ways to save on airfare from Region of Ontario to London is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the evening could potentially save you up to 16% on airfare.

Weekly flight availability from Region of Ontario to London

Explore weekly flight availability from Ontario to London. 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 2 December 2025.

The most flights from CAON to LON are scheduled on a Monday (40 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (30 on average).

Related info for your journey

Find useful and relevant information for your journey from Ontario to London. 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 Region of Ontario to London?

    A quick flight from Region of Ontario to London can take about 10h 10m. Icelandair provides one of the quickest options available for as low as £423. The distance between Region of Ontario and London is about 3543 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    £200 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on WestJet and Air Canada, with prices starting from £214 and £271, respectively.

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

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

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

    The top 3 most reliable airlines when flying from Region of Ontario to London are KLM (85%), Air France (85%) and Delta (85%).

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

    Looking for the cheapest flight from Region of Ontario to London? While on average our users pay £973, our data indicates the cheapest price to be £268. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £333.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Region of Ontario to London (average of £309). Flying from Region of Ontario to London in July is currently the most expensive (average of £451). 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Croydon
Hounslow
Slough
Gatwick
Luton
Ilford
Wembley
Colchester
Brentford
Watford
Hayes
Crawley
Deal
Winchester
Romford
Bedford
Chichester
Guildford
Ipswich

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to London

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Heathrow flights
Vancouver Intl to Heathrow flights
Pearson Intl to Gatwick flights
Pierre Elliott Trudeau Intl to Heathrow flights
Pearson Intl to London City flights
Toronto Island to Heathrow flights
Pearson Intl to Stansted flights
Vancouver Intl to Gatwick flights
Pearson Intl to Luton flights
Calgary to Heathrow flights
Pierre Elliott Trudeau Intl to Gatwick flights
Halifax to Heathrow flights
Pierre Elliott Trudeau Intl to Stansted flights
Abbotsford to Heathrow flights
Vancouver Intl to Stansted flights
Calgary to Gatwick flights
Pearson Intl to Edinburgh flights
Ottawa to Heathrow flights
Calgary to London City flights
Halifax to Gatwick flights
Pearson Intl to Manchester flights
Ottawa to Gatwick flights
Vancouver Intl to Luton flights
Pierre Elliott Trudeau Intl to Edinburgh flights
Vancouver Intl to Edinburgh flights
Winnipeg to Heathrow flights
Edmonton to Heathrow flights
Calgary to Edinburgh flights
Vancouver Intl to Manchester flights
Calgary to Stansted flights
Edmonton to Gatwick flights
Winnipeg to Gatwick flights
Québec City to Heathrow flights
Victoria to Gatwick flights
Québec City to Gatwick flights
Pierre Elliott Trudeau Intl to Manchester flights
Victoria to Heathrow flights

Top 10 airlines flying from Ontario to London

Discover the top 10 airlines that operate flights from Ontario to London. 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 2 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapest£344Average£486FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
IcelandairCheapest£367Average£474FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£371Average£528FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Porter AirlinesCheapest£376Average£486FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapest£386Average£805FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
KLMCheapest£387Average£459FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£395Average£613FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£404Average£619FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£408Average£546FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£423Average£443FlexibilityNo 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 Ontario to London?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from Ontario today with Cheapflights!

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

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

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

Need flexible booking options for your flight to London from Ontario? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Of course! You can now track prices for flights from Ontario to London 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.