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Cheap flights from Ontario to London Heathrow Airport from £210

YYZ — LHR
1 Oct — 8 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Heathrow

Sat 7/1119:40 -
1 stop18h 50m
Tue 17/1112:15 -
1 stop11h 00m
Deal found 31/8£416
Wed 11/1119:40 -
1 stop18h 50m
Sat 21/1112:15 -
1 stop11h 00m
Deal found 28/8£416
Mon 5/1022:55 -
1 stop18h 05m
Wed 9/1208:15 -
1 stop18h 00m
Deal found 31/8£417
Thu 26/1119:40 -
1 stop10h 10m
Tue 1/1220:35 -
1 stop26h 40m
Deal found 27/8£418
Mon 28/923:55 -
1 stop10h 05m
Mon 5/1007:40 -
1 stop13h 10m
Deal found 31/8£419
Mon 5/1022:55 -
1 stop13h 50m
Tue 8/1206:00 -
1 stop14h 20m
Deal found 27/8£420
Tue 13/1020:45 -
1 stop18h 35m
Tue 20/1021:25 -
1 stop26h 45m
Deal found 29/8£421
Sun 22/1121:45 -
1 stop19h 55m
Sun 29/1108:15 -
1 stop16h 40m
Deal found 28/8£421
Thu 26/1117:10 -
1 stop19h 30m
Thu 3/1219:50 -
2 stops24h 50m
Deal found 27/8£422
Wed 18/1121:45 -
1 stop14h 45m
Sat 28/1118:30 -
1 stop30h 25m
Deal found 31/8£422
Wed 4/1117:10 -
2 stops18h 50m
Wed 11/1106:40 -
1 stop14h 00m
Deal found 31/8£422
Tue 6/1020:40 -
1 stop30h 35m
Fri 9/1007:45 -
1 stop17h 34m
Deal found 31/8£422

Find flight deals from Ontario to Heathrow

Round-trip from

£416

One-way from

£210

Popular in

December

Cheapest in

January

Average price

£473

Good round-trip deal

£469 or less

Good one-way deal

£346 or less
Icelandair
  • Icelandair
  • 7/11-17/11
  • 2 total stops
  • 29h 50m total
  • Ontario to London
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2/10
  • 2/10
  • 2 total stops
  • 29h 55m total
  • Ontario to London
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Highest demand for flights based on searches. 0% potential increase in price (£1 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
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Average for round-trip flights in September 2026
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Price to beat on a round-trip flight from Ontario to London Heathrow.
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Price to beat on a one-way flight from Ontario to London Heathrow.
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Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

TorontoLondon

YYZ Toronto Pearson Intl - LHR London Heathrow

YYZLHR

Toronto Pearson Intl

Mon 5/10

22:55-11:10

Nonstop7h 15m

London Heathrow

Wed 9/12

08:40-15:40

1 stop12h 00m

£472

TorontoLondon

YYZ Toronto Pearson Intl - LHR London Heathrow

YYZLHR

Toronto Pearson Intl

Thu 24/9

23:50-11:50

Nonstop7h 00m

London Heathrow

Wed 30/9

17:40-20:30

Nonstop7h 50m

£476

TorontoLondon

YYZ Toronto Pearson Intl - LHR London Heathrow

YYZLHR

Toronto Pearson Intl

Sat 10/10

18:05-08:35

1 stop9h 30m

London Heathrow

Sun 25/10

15:00-19:00

Nonstop8h 00m

£478

TorontoLondon

YYZ Toronto Pearson Intl - LHR London Heathrow

YYZLHR

Toronto Pearson Intl

Sun 13/9

20:15-08:35

Nonstop7h 20m

London Heathrow

Sun 20/9

08:30-11:15

Nonstop7h 45m

£478

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LHR London Heathrow

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 2/10

18:40-06:30

Nonstop6h 50m

London Heathrow

Mon 5/10

14:05-16:40

Nonstop7h 35m

£478

TorontoLondon

YYZ Toronto Pearson Intl - LHR London Heathrow

YYZLHR

Toronto Pearson Intl

Thu 19/11

20:30-08:35

Nonstop7h 05m

London Heathrow

Mon 23/11

10:00-15:40

1 stop10h 40m

£480

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LHR London Heathrow

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 30/11

19:05-16:35

1 stop16h 30m

London Heathrow

Mon 7/12

10:00-17:15

1 stop12h 15m

£499

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LHR London Heathrow

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 12/10

20:45-17:50

2 stops16h 05m

London Heathrow

Thu 22/10

08:45-19:21

2 stops15h 36m

£501

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Wed 14/10

06:05-05:55

1 stop18h 50m

London Heathrow

Wed 21/10

08:40-23:54

2 stops20h 14m

£502

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Fri 11/9

10:37-06:55

2 stops15h 18m

London Heathrow

Wed 16/9

08:40-23:54

2 stops20h 14m

£503

Flights are sorted by cheapest return flights first.

Deals found on 31/8

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ontario with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from Ontario to London Heathrow Airport

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

Currently, February is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of £446). Flying from Region of Ontario to London Heathrow Airport in December is currently the most expensive (average of £723). 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 LHR?

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

The most flights from CAON to LHR are scheduled on a Monday (46 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (34 on average).

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

Airfare is below average for this route at the moment.
Region of Ontario to London Heathrow Airport flights typically cost between £472 and £605 in November.
The cheapest return price found within the last 5 days was £416 on Icelandair (7 Nov–17 Nov).

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

Booking 68 days in advance of your planned departure date is, on average, the best time to get cheap flights from Region of Ontario to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Related info for your journey

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

    For as low as £476, Delta can have you in London Heathrow Airport from Region of Ontario in 7h. Region of Ontario and London Heathrow Airport are separated by a distance of 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 Heathrow Airport one-way?

    £167 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 Air Canada and Lufthansa, with prices starting from £221 and £279, respectively.

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

    When deciding which route to take from Region of Ontario to London Heathrow Airport consider Toronto Pearson Intl - London Heathrow, Montreal Pierre Elliott Trudeau Intl - London Heathrow or Toronto Island - London Heathrow as they are the most popular.

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

    No one likes to see their flight delayed. When booking a flight from Region of Ontario to London Heathrow Airport consider choosing SAUDIA (87%), KLM (85%) or Air France (85%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from Region of Ontario to London Heathrow Airport? While on average our users pay £1,660, our data indicates the cheapest price to be £301. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £309.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Heathrow 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 Heathrow Airport?

    Currently, February is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of £446). Flying from Region of Ontario to London Heathrow Airport in December is currently the most expensive (average of £723). 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 Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Milton Keynes
Luton
Gatwick
Wembley
Slough
Ilford
Hayes
Croydon
Northampton
Colchester
Eastbourne
Brentford
Barnet
Salisbury
Southall
Southend-on-Sea
Enfield
Kingston upon Thames
Watford

Browse thousands of different options on Cheapflights for your next trip

Top 7 airlines flying from Ontario to Heathrow

AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£307Average£631FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£357Average£624FlexibilityNo cancel feeOn-time76%
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KLMCheapest£376Average£491FlexibilityNo cancel feeOn-time75%
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Air CanadaCheapest£414Average£690FlexibilityNo cancel feeOn-time67%
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British AirwaysCheapest£417Average£636FlexibilityNo cancel feeOn-time70%
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Virgin AtlanticCheapest£419Average£611FlexibilityNo cancel feeOn-time72%
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LufthansaCheapest£420Average£586FlexibilityNo cancel feeOn-time76%
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Fly with Cheapflights

How does Cheapflights help users find flights from Ontario to Heathrow?

Cheapflights makes it easy to find Ontario to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

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

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Heathrow flexibly with Cheapflights today.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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