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Cheap flights from Ontario to London from £191

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 16/1. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
18 Dec — 25 Dec1
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 18 November 2025.

Round-trip from

£414

One-way from

£191

Popular in

December

Cheapest in

February

Average price

£457

Good round-trip deal

£475 or less

Good one-way deal

£246 or less
Icelandair
  • Icelandair
  • 18/4-25/4
  • 2 total stops
  • 58h 15m total
  • Ontario to London
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16/1
  • 16/1
  • 1 total stop
  • 34h 20m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£25 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£13 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 Ontario to London (LON).
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Price to beat on a one-way flight from Ontario to London (LON).
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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 18 November 2025.

Thu 4/1221:35YYZ - LGW
Nonstop7h 10mAir Transat
Sat 7/211:40LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 16/11£414
Fri 28/1119:35YYZ - STN
1 stop19h 30mMultiple Airlines
Wed 3/1206:30STN - YYZ
2 stops14h 45mMultiple Airlines
Deal found 16/11£415
Sun 30/1119:35YYZ - LGW
1 stop15h 00mMultiple Airlines
Thu 4/1208:50LGW - YYZ
2 stops15h 55mMultiple Airlines
Deal found 16/11£416
Mon 17/1123:00YYZ - LHR
Nonstop7h 20mAir Canada
Wed 19/1109:00LHR - YYZ
1 stop12h 10mAir Canada
Deal found 14/11£419
Wed 3/1217:25YYZ - LTN
1 stop10h 10mMultiple Airlines
Wed 10/1206:50LTN - YYZ
1 stop14h 05mMultiple Airlines
Deal found 17/11£421
Fri 5/1219:25YYZ - LGW
1 stop13h 20mMultiple Airlines
Fri 12/1211:30LGW - YYZ
1 stop30h 00mMultiple Airlines
Deal found 16/11£421
Sun 30/1119:35YYZ - LTN
1 stop16h 10mMultiple Airlines
Thu 4/1209:00LTN - YYZ
2 stops15h 45mMultiple Airlines
Deal found 16/11£422
Sun 30/1119:35YYZ - STN
1 stop14h 15mMultiple Airlines
Thu 4/1206:30STN - YYZ
2 stops14h 45mMultiple Airlines
Deal found 16/11£422
Fri 28/1119:35YYZ - LGW
1 stop19h 10mMultiple Airlines
Wed 3/1217:40LGW - YYZ
2 stops27h 35mMultiple Airlines
Deal found 16/11£423
Fri 28/1119:35YYZ - STN
1 stop19h 30mMultiple Airlines
Thu 4/1206:30STN - YYZ
2 stops14h 45mMultiple Airlines
Deal found 16/11£423
Fri 28/1119:35YYZ - LGW
1 stop19h 10mMultiple Airlines
Tue 2/1219:55LGW - YYZ
1 stop20h 20mMultiple Airlines
Deal found 15/11£425
Wed 3/1217:25YYZ - STN
1 stop9h 25mMultiple Airlines
Sun 7/1206:30STN - YYZ
1 stop14h 25mMultiple Airlines
Deal found 16/11£426

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 18 November 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 - LGW

YYZLGW

Toronto Pearson Intl

Wed 7/1

19:55-22:10

1 stop21h 15m

London Gatwick

Thu 15/1

06:20-11:50

1 stop10h 30m

£425

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Wed 7/1

19:55-22:10

1 stop21h 15m

London Gatwick

Sun 18/1

06:25-11:50

1 stop10h 25m

£427

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Wed 11/3

22:00-13:20

1 stop11h 20m

London Stansted

Tue 17/3

06:30-14:15

1 stop11h 45m

£427

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Sun 10/5

22:05-17:35

1 stop14h 30m

London Stansted

Thu 14/5

06:30-13:55

1 stop12h 25m

£431

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Tue 13/1

21:35-09:45

Nonstop7h 10m

London Gatwick

Thu 22/1

11:40-15:00

Nonstop8h 20m

£433

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Sat 9/5

22:45-10:45

Nonstop7h 00m

London Gatwick

Fri 15/5

12:40-15:40

Nonstop8h 00m

£444

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 1/12

21:35-09:45

Nonstop7h 10m

London Gatwick

Thu 4/12

11:40-15:00

Nonstop8h 20m

£445

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Wed 18/2

19:10-07:10

Nonstop7h 00m

London Heathrow

Wed 25/2

08:45-18:20

1 stop14h 35m

£451

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 11/5

22:45-10:45

Nonstop7h 00m

London Gatwick

Fri 15/5

11:35-17:40

1 stop11h 05m

£455

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 2/12

19:30-07:10

Nonstop6h 40m

London Heathrow

Wed 10/12

13:25-16:10

Nonstop7h 45m

£457

Flights are sorted by cheapest return flights first.

Deals found on 17/11

Showing 1-10 of 60 results
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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 £311). Flying from Region of Ontario to London in July is currently the most expensive (average of £453). 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 18 November 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 afternoon could potentially save you up to 14% 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 18 November 2025.

The most flights from CAON to LON are scheduled on a Sunday (41 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (31 on average).

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

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 7h. Porter Airlines provides one of the quickest options available for as low as £444. The distance between Region of Ontario and London is about 3563 mi. Generally, flights for this route are direct.

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

    £194 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 £194 and £258, 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 £1,128, our data indicates the cheapest price to be £219. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £359.

  • 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 £311). Flying from Region of Ontario to London in July is currently the most expensive (average of £453). 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?

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Alternative routes for Ontario to London

See prices for flight routes from nearby airports that may be better suited for you.
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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 18 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapest£346Average£490FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Aer LingusCheapest£373Average£515FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£373Average£504FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Porter AirlinesCheapest£378Average£494FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapest£387Average£808FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
KLMCheapest£389Average£462FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£396Average£608FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£406Average£624FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£408Average£540FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£423Average£512FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

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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.

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