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Cheap flights from Ontario to London from £195

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 16/7. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
16 juil. — 23 juil.1
1 adult

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 11 juillet 2025.

Round-trip from

£395

One-way from

£195

Popular in

December

Cheapest in

February

Average price

£562

Good round-trip deal

£457 or less

Good one-way deal

£209 or less
Air Transat
  • Air Transat
  • 4/9-16/9
  • 1 total stop
  • 18h 25m total
  • Ontario to London
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Porter Airlines
  • Porter Airlines
  • 16/7
  • 1 total stop
  • 9h 55m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£12 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
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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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Find flight deals from Ontario to London

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 11 juillet 2025.

jeu. 4/922:05YUL - LGW
Nonstop6h 45mAir Transat
mar. 16/912:40LGW - YUL
1 stop11h 40mAir Transat
Deal found 10/7£395
ven. 10/1018:15YUL - LHR
1 stop10h 45mAir Canada
lun. 20/1009:30LHR - YUL
Nonstop7h 10mAir Canada
Deal found 9/7£397
mer. 17/921:55YUL - LHR
Nonstop6h 40mMultiple Airlines
mer. 24/906:50LHR - YUL
1 stop9h 45mMultiple Airlines
Deal found 8/7£400
dim. 26/1018:35YYZ - LHR
1 stop14h 05mTAP AIR PORTUGAL
jeu. 4/1206:00LHR - YYZ
1 stop13h 45mTAP AIR PORTUGAL
Deal found 9/7£400
mar. 9/916:10YYZ - LGW
1 stop12h 40mAir Transat
sam. 13/909:40LGW - YYZ
Nonstop8h 05mAir Transat
Deal found 9/7£400
mar. 9/911:15YTZ - LGW
1 stop17h 35mAir Transat
sam. 13/911:35LGW - YTZ
1 stop13h 25mAir Transat
Deal found 9/7£401
lun. 1/923:20YYZ - LHR
1 stop26h 10mAir Canada
lun. 8/917:40LHR - YYZ
Nonstop7h 50mAir Canada
Deal found 9/7£401
dim. 21/923:55YYZ - LTN
1 stop16h 35mMultiple Airlines
mer. 8/1010:00LTN - YYZ
1 stop10h 50mMultiple Airlines
Deal found 8/7£401
dim. 21/923:55YYZ - STN
1 stop16h 20mMultiple Airlines
mer. 8/1009:05STN - YYZ
1 stop11h 45mMultiple Airlines
Deal found 8/7£401
dim. 7/922:00YUL - LHR
Nonstop6h 40mBritish Airways
lun. 15/918:05LHR - YUL
Nonstop7h 10mBritish Airways
Deal found 10/7£402
lun. 8/918:55YTZ - LGW
1 stop9h 55mPorter Airlines
lun. 15/911:35LGW - YTZ
1 stop14h 15mPorter Airlines
Deal found 9/7£403
ven. 19/922:00YYZ - LHR
Nonstop7h 15mBritish Airways
lun. 29/917:15LHR - YYZ
Nonstop7h 55mBritish Airways
Deal found 9/7£403

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 11 juillet 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

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

jeu. 4/9

22:05-09:50

Nonstop6h 45m

London Gatwick

mar. 16/9

12:40-19:20

1 stop11h 40m

£395

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

ven. 10/10

18:15-10:00

1 stop10h 45m

London Heathrow

lun. 20/10

09:30-11:40

Nonstop7h 10m

£397

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

mer. 17/9

21:55-09:35

Nonstop6h 40m

London Heathrow

mer. 24/9

06:50-11:35

1 stop9h 45m

£400

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

dim. 26/10

18:35-12:40

1 stop14h 05m

London Heathrow

jeu. 4/12

06:00-14:45

1 stop13h 45m

£400

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

mar. 9/9

16:10-09:50

1 stop12h 40m

London Gatwick

sam. 13/9

09:40-12:45

Nonstop8h 05m

£400

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

lun. 1/9

23:20-06:30

1 stop26h 10m

London Heathrow

lun. 8/9

17:40-20:30

Nonstop7h 50m

£401

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

dim. 21/9

23:55-21:30

1 stop16h 35m

London Luton

mer. 8/10

10:00-15:50

1 stop10h 50m

£401

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

mar. 9/9

11:15-09:50

1 stop17h 35m

London Gatwick

sam. 13/9

11:35-20:00

1 stop13h 25m

£401

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

dim. 21/9

23:55-21:15

1 stop16h 20m

London Stansted

mer. 8/10

09:05-15:50

1 stop11h 45m

£401

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

dim. 7/9

22:00-09:40

Nonstop6h 40m

London Heathrow

lun. 15/9

18:05-20:15

Nonstop7h 10m

£402

Flights are sorted by cheapest return flights first.

Deals found on 10/7

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, January is the cheapest month in which you can book a flight from Region of Ontario to London (average of £112). Flying from Region of Ontario to London in August is currently the most expensive (average of £164). 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 11 juillet 2025.

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

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 11 juillet 2025.

The most flights from CAON to LON are scheduled on a Thursday (49 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (30 on average).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 11 juillet 2025.
Read through reviews of airlines operating flights from Ontario to London, such as Delta, Porter Airlines, andKLM. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,951 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Porter Airlines
8.0
Very Good
304 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,372 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Transat
7.8
Good
412 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,655 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

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

    £195 is the cheapest one-way deal found within the past few days, from Porter Airlines. You may also be able to find cheap deals on TAP AIR PORTUGAL and Air Transat, with prices starting from £195 and £196, 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 Croatia Airlines (88%), Ethiopian Air (82%) and Singapore Airlines (81%).

  • 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 £1,322, our data indicates the cheapest price to be £222. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £361.

  • 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, January is the cheapest month in which you can book a flight from Region of Ontario to London (average of £112). Flying from Region of Ontario to London in August is currently the most expensive (average of £164). 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 Ontario?

Book flights to Ontario if you plan to visit one of these locations
Hounslow
Croydon
Milton Keynes
Deal
Gatwick
Slough
Luton
Wembley
Crawley
Eastbourne
Ilford
Hayes
Ipswich
Folkestone
Southend-on-Sea
Watford
Winchester
Maidstone
Guildford
Chichester

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
Pearson Intl to Gatwick flights
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Vancouver Intl to Gatwick flights
Pierre Elliott Trudeau Intl to Heathrow flights
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Winnipeg to Gatwick flights
Vancouver Intl to Stansted flights
Abbotsford to Heathrow flights
Calgary to Stansted flights
Calgary to Edinburgh flights
Edmonton to Luton flights
Kelowna to Heathrow flights
Pearson Intl to Birmingham 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 11 juillet 2025.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapest£347Average£466FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Aer LingusCheapest£360Average£434FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£362Average£471FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air CanadaCheapest£368Average£744FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapest£371Average£498FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Virgin AtlanticCheapest£391Average£463FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£396Average£589FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£399Average£518FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£400Average£510FlexibilityNo cancel feeOn-time75%
Search KLM flights
American AirlinesCheapest£412Average£412FlexibilityNo cancel feeOn-time71%
Search American Airlines 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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