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Cheap flights from Ontario to London from £186

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 31/3. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
30 Mar — 6 Apr1
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 25 March 2025.

Round-trip from

£362

One-way from

£186

Popular in

December

Cheapest in

February

Average price

£428

Good round-trip deal

£392 or less

Good one-way deal

£188 or less
Icelandair
  • Icelandair
  • 5/5-13/5
  • 2 total stops
  • 26h 40m total
  • Ontario to London
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31/3
  • 31/3
  • 1 total stop
  • 33h 00m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£7 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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).
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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 25 March 2025.

Mon 5/520:50YYZ - LGW
1 stop12h 45mIcelandair
Tue 13/513:00LGW - YYZ
1 stop13h 55mIcelandair
Deal found 24/3£362
Fri 9/521:00YTZ - LGW
1 stop31h 50mPorter Airlines
Fri 16/511:35LGW - YTZ
1 stop11h 35mPorter Airlines
Deal found 25/3£363
Sun 8/623:00YYZ - LHR
1 stop16h 20mIcelandair
Sat 14/621:25LHR - YYZ
1 stop29h 30mIcelandair
Deal found 24/3£363
Fri 9/523:15YYZ - LGW
1 stop29h 35mAir Transat
Fri 16/511:35LGW - YYZ
1 stop25h 38mAir Transat
Deal found 24/3£363
Sun 8/617:35YYZ - STN
2 stops19h 25mMultiple Airlines
Fri 13/606:40STN - YYZ
1 stop12h 30mMultiple Airlines
Deal found 23/3£363
Fri 13/623:55YYZ - LTN
1 stop16h 50mMultiple Airlines
Sat 21/622:10LTN - YYZ
1 stop22h 40mMultiple Airlines
Deal found 25/3£367
Thu 1/522:40YYZ - LHR
1 stop17h 20mAir Canada
Thu 8/508:40LHR - YYZ
1 stop12h 45mAir Canada
Deal found 24/3£369
Tue 27/522:45YYZ - LGW
Nonstop7h 00mPorter Airlines
Sat 7/611:35LGW - YYZ
1 stop12h 33mPorter Airlines
Deal found 24/3£370
Sat 24/512:35YTZ - LGW
1 stop16h 15mAir Transat
Sat 31/511:35LGW - YTZ
1 stop29h 35mAir Transat
Deal found 25/3£374
Fri 9/515:25YTZ - LHR
1 stop10h 05mAir Canada
Fri 16/508:40LHR - YTZ
2 stops14h 10mAir Canada
Deal found 25/3£374
Fri 4/417:25YYZ - LHR
1 stop9h 35mAer Lingus
Mon 7/407:40LHR - YYZ
1 stop13h 00mAer Lingus
Deal found 24/3£374
Mon 5/523:35YYZ - LHR
Nonstop7h 15mMultiple Airlines
Tue 13/506:00LHR - YYZ
1 stop15h 25mMultiple Airlines
Deal found 24/3£377

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 25 March 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

Mon 5/5

20:50-14:35

1 stop12h 45m

London Gatwick

Tue 13/5

13:00-21:55

1 stop13h 55m

£362

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Tue 13/5

18:55-09:50

1 stop9h 55m

London Gatwick

Sun 18/5

11:35-18:10

1 stop11h 35m

£363

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 8/6

23:00-20:20

1 stop16h 20m

London Heathrow

Sat 14/6

21:25-21:55

1 stop29h 30m

£363

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Fri 9/5

23:15-09:50

1 stop29h 35m

London Gatwick

Fri 16/5

11:35-08:13

1 stop25h 38m

£363

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Sun 8/6

17:35-18:00

2 stops19h 25m

London Stansted

Fri 13/6

06:40-14:10

1 stop12h 30m

£363

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Fri 13/6

23:55-21:45

1 stop16h 50m

London Luton

Sat 21/6

22:10-15:50

1 stop22h 40m

£367

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 1/5

22:40-21:00

1 stop17h 20m

London Heathrow

Thu 8/5

08:40-16:25

1 stop12h 45m

£369

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Tue 27/5

22:45-10:45

Nonstop7h 00m

London Gatwick

Sat 7/6

11:35-19:08

1 stop12h 33m

£370

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Sat 24/5

12:35-09:50

1 stop16h 15m

London Gatwick

Sat 31/5

11:35-12:10

1 stop29h 35m

£374

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Fri 4/4

17:25-08:00

1 stop9h 35m

London Heathrow

Mon 7/4

07:40-15:40

1 stop13h 00m

£374

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 60 results
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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, 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 25 March 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.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 25 March 2025.
See what other customers who have flown with Delta, Porter Airlines and KLM from Ontario to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,890 reviews
Check prices

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

8.0

Entertainment

7.9

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
7,890 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

8.0

Entertainment

7.9

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
7.9
Good
276 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

8.0

Entertainment

7.9

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
1,318 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

8.0

Entertainment

7.9

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
381 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

8.0

Entertainment

7.9

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.
Azores Airlines
7.6
Good
63 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

8.0

Entertainment

7.9

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?

    £189 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 Air Transat and WestJet, with prices starting from £200 and £205, 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 American Airlines (70%), Aer Lingus (70%) and Finnair (70%).

  • 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 £1,030, our data indicates the cheapest price to be £264. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £241.

  • 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
Deal
Milton Keynes
Gatwick
Croydon
Luton
Slough
Eastbourne
Wembley
Hayes
Ilford
Crawley
Southend-on-Sea
Winchester
Maidstone
Ipswich
Watford
Southall
Dartford
Folkestone

Browse thousands of different options on Cheapflights for your next trip

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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 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest£255Average£373FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapest£343Average£518FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air TransatCheapest£355Average£559FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Aer LingusCheapest£370Average£458FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Air CanadaCheapest£384Average£752FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapest£389Average£571FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Virgin AtlanticCheapest£411Average£470FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£420Average£487FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£422Average£544FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£433Average£624FlexibilityNo cancel feeOn-time76%
Search Lufthansa 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.

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