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Cheap flights from Ontario to London from £210

YYZ — LON
15 Dec — 22 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to London

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to London

Tue 24/1120:25 -
1 stop16h 25m
Thu 26/1113:50 -
1 stop30h 05m
Deal found 10/11£419
Wed 25/1119:40 -
1 stop18h 50m
Wed 2/1220:35 -
1 stop26h 40m
Deal found 11/11£421
Sat 28/1121:35 -
Nonstop7h 10m
Sat 5/1211:40 -
Nonstop8h 20m
Deal found 14/11£421
Sat 21/1121:35 -
Nonstop7h 10m
Sat 28/1111:40 -
Nonstop8h 20m
Deal found 14/11£422
Mon 7/1217:50 -
2 stops20h 25m
Mon 14/1220:20 -
2 stops26h 47m
Deal found 13/11£423
Tue 1/1219:40 -
2 stops18h 35m
Tue 8/1206:20 -
2 stops16h 55m
Deal found 11/11£423
Sat 14/1121:35 -
Nonstop7h 10m
Fri 20/1111:40 -
Nonstop8h 20m
Deal found 10/11£423
Sat 21/1121:35 -
Nonstop7h 10m
Sun 31/111:40 -
Nonstop8h 20m
Deal found 12/11£424
Tue 1/1214:45 -
2 stops23h 55m
Tue 8/1206:10 -
2 stops16h 57m
Deal found 9/11£425
Tue 1/1219:40 -
1 stop10h 10m
Mon 7/1220:35 -
1 stop26h 40m
Deal found 14/11£425
Fri 27/1117:50 -
2 stops22h 00m
Fri 4/1221:30 -
2 stops26h 30m
Deal found 9/11£427
Sun 15/1121:35 -
Nonstop7h 10m
Wed 18/1111:40 -
Nonstop8h 20m
Deal found 11/11£427

Find flight deals from Ontario to London

Round-trip from

£417

One-way from

£210

Popular in

December

Cheapest in

February

Average price

£477

Good round-trip deal

£444 or less

Good one-way deal

£295 or less
Icelandair
  • Icelandair
  • 24/1-29/1
  • 2 total stops
  • 21h 10m total
  • Ontario to London
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13/12-31/12
  • 13/12-31/12
  • 2 total stops
  • 26h 50m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£15 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
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Average for round-trip flights in November 2026
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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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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Ontario to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

TorontoLondon

YTZ Toronto Island - LGW London Gatwick

YTZLGW

Toronto Island

Mon 30/11

17:50-09:00

3 stops34h 10m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£224

TorontoLondon

YTZ Toronto Island - LGW London Gatwick

YTZLGW

Toronto Island

Mon 7/12

17:50-17:20

3 stops18h 30m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£225

TorontoLondon

YTZ Toronto Island - LGW London Gatwick

YTZLGW

Toronto Island

Mon 25/1

14:50-19:15

2 stops23h 25m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£228

TorontoLondon

YYZ Toronto Pearson Intl - LHR London Heathrow

YYZLHR

Toronto Pearson Intl

Mon 18/1

22:45-21:35

1 stop17h 50m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£230
Fastest return journey

TorontoLondon

YYZ Toronto Pearson Intl - LGW London Gatwick

YYZLGW

Toronto Pearson Intl

Sat 21/11

21:35-09:45

Nonstop7h 10m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£236

TorontoLondon

YYZ Toronto Pearson Intl - LGW London Gatwick

YYZLGW

Toronto Pearson Intl

Thu 19/11

18:45-08:40

1 stop32h 55m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£238

TorontoLondon

YYZ Toronto Pearson Intl - LTN London Luton

YYZLTN

Toronto Pearson Intl

Sun 6/12

20:15-10:35

1 stop33h 20m

London Luton

Wed 31/12

00:00-18:00

Nonstop0h 00m

£238

TorontoLondon

YTZ Toronto Island - LHR London Heathrow

YTZLHR

Toronto Island

Tue 8/12

10:20-21:00

2 stops29h 40m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£250

TorontoLondon

YYZ Toronto Pearson Intl - LHR London Heathrow

YYZLHR

Toronto Pearson Intl

Fri 30/4

14:45-07:25

1 stop11h 40m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£250

TorontoLondon

YYZ Toronto Pearson Intl - LGW London Gatwick

YYZLGW

Toronto Pearson Intl

Sat 23/1

21:35-09:45

Nonstop7h 10m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£250

Flights are sorted by cheapest return flights first.

Deals found on 9/11

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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, February is the cheapest month in which you can book a flight from Region of Ontario to London (average of £444). Flying from Region of Ontario to London in December is currently the most expensive (average of £716). 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?

When flying from Region of Ontario to London, 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 Region of Ontario to London

The most flights from CAON to LON are scheduled on a Friday (37 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (17 on average).

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

Airfare is below average for this route at the moment.
Region of Ontario to London flights typically cost between £429 and £539 in January.
The cheapest return price found within the last 5 days was £417 on Icelandair (24 Jan–29 Jan).

How far ahead should I book a flight from Region of Ontario to London?

The best time to book flights from Region of Ontario to London is 76 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Related info for your journey

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

    A quick flight from Region of Ontario to London can take about 7h 05m. Air Transat provides one of the quickest options available for as low as £486. 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?

    £38 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Transat and TAP AIR PORTUGAL, with prices starting from £167 and £197, 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 Toronto Pearson Intl - London City.

  • 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 (86%), SAUDIA (86%) and Air France (86%).

  • 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 £568, our data indicates the cheapest price to be £254. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £373.

  • 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, February is the cheapest month in which you can book a flight from Region of Ontario to London (average of £444). Flying from Region of Ontario to London in December is currently the most expensive (average of £716). 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
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Luton
Wembley
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Gatwick
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Ilford
Hayes
Folkestone
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Croydon
Barnet
Southall
Southend-on-Sea
Enfield
Brentford
Dover
Harrow
Watford
Dagenham

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Top 8 airlines flying from Ontario to London

AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£314Average£647FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£358Average£566FlexibilityNo cancel feeOn-time76%
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KLMCheapest£385Average£504FlexibilityNo cancel feeOn-time75%
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Air TransatCheapest£396Average£483FlexibilityNo cancel feeOn-time50%
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Air CanadaCheapest£426Average£603FlexibilityNo cancel feeOn-time67%
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LufthansaCheapest£429Average£595FlexibilityNo cancel feeOn-time76%
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Virgin AtlanticCheapest£432Average£627FlexibilityNo cancel feeOn-time72%
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British AirwaysCheapest£485Average£654FlexibilityNo cancel feeOn-time70%
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Fly with Cheapflights

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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