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Cheap flights from London to Ontario from C$ 387

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 22/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YYZ
21 Apr — 28 Apr1
1 adult

Cheap flight deals from London to Ontario

Keep the following information in mind while searching for London to Ontario flight deals. Data was last updated 16 April 2025.

Round-trip from

C$ 553

One-way from

C$ 387

Popular in

August

Cheapest in

February

Average price

C$ 763

Good round-trip deal

C$ 715 or less

Good one-way deal

C$ 436 or less
Air Transat
  • Air Transat
  • 12/6-19/6
  • Nonstop
  • 15h 05m total
  • London to Ontario
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22/5
  • 22/5
  • 2 total stops
  • 29h 20m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 162 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 34 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from London (LON) to Ontario.
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Price to beat on a one-way flight from London (LON) to Ontario.
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Find flight deals from London to Ontario

Cheapest flights from London to Ontario
Explore the most affordable flight options available from London to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 April 2025.

Thu 12/612:40 p.m.LGW - YYZ
Nonstop8h 00mAir Transat
Thu 19/67:50 p.m.YYZ - LGW
Nonstop7h 05mAir Transat
Deal found 16/4C$ 553
Fri 16/511:35 a.m.LGW - YTZ
1 stop15h 45mAir Transat
Wed 21/59:00 p.m.YTZ - LGW
1 stop31h 50mAir Transat
Deal found 15/4C$ 573
Fri 12/93:40 p.m.LGW - YYZ
1 stop11h 15mIcelandair
Fri 19/98:50 p.m.YYZ - LGW
1 stop12h 50mIcelandair
Deal found 16/4C$ 598
Thu 8/56:55 a.m.STN - YYZ
1 stop12h 15mMultiple Airlines
Tue 20/510:15 p.m.YYZ - STN
1 stop16h 40mMultiple Airlines
Deal found 15/4C$ 617
Tue 13/58:45 a.m.LHR - YYZ
1 stop12h 40mAir Canada
Tue 20/55:00 p.m.YYZ - LHR
1 stop12h 00mAir Canada
Deal found 15/4C$ 620
Tue 6/58:45 a.m.LHR - YYZ
1 stop12h 40mMultiple Airlines
Tue 20/56:30 a.m.YYZ - LHR
1 stop9h 30mMultiple Airlines
Deal found 16/4C$ 622
Thu 1/56:00 a.m.LHR - YTZ
2 stops15h 50mAir Canada
Wed 7/54:20 p.m.YTZ - LHR
2 stops12h 40mAir Canada
Deal found 16/4C$ 623
Thu 1/56:30 a.m.LHR - YYZ
1 stop11h 50mKLM
Tue 6/510:30 p.m.YYZ - LHR
Nonstop7h 10mKLM
Deal found 16/4C$ 624
Wed 23/48:50 a.m.LHR - YYZ
1 stop11h 50mBritish Airways
Thu 8/56:05 p.m.YYZ - LHR
Nonstop7h 10mBritish Airways
Deal found 16/4C$ 626
Mon 28/43:20 p.m.LHR - YYZ
1 stop10h 35mAir France
Mon 5/510:30 p.m.YYZ - LHR
Nonstop7h 10mAir France
Deal found 16/4C$ 630
Mon 28/48:40 a.m.LHR - YTZ
2 stops14h 10mMultiple Airlines
Sun 4/58:25 p.m.YTZ - LHR
1 stop8h 35mMultiple Airlines
Deal found 16/4C$ 631
Thu 8/58:45 a.m.LTN - YYZ
1 stop10h 25mMultiple Airlines
Tue 20/510:15 p.m.YYZ - LTN
1 stop19h 10mMultiple Airlines
Deal found 15/4C$ 635

Cheapflights Fare Finder

Customize your flight search to find flights from London to Ontario 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 629,999 searches. Data last updated 16 April 2025.
Use the filters below to find and compare flights from London to Ontario that are best for you.

Fly from

London

Fly to

Ontario

Route

Depart

Return

Price

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Thu 12/6

12:40 p.m.-3:40 p.m.

Nonstop8h 00m

Toronto Pearson Intl

Thu 19/6

7:50 p.m.-7:55 a.m.

Nonstop7h 05m

C$ 553

LondonToronto

LGW - YTZ

LGWYTZ

London Gatwick

Fri 16/5

11:35 a.m.-10:20 p.m.

1 stop15h 45m

Toronto Island

Wed 21/5

9:00 p.m.-9:50 a.m.

1 stop31h 50m

C$ 573

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Wed 9/7

12:40 p.m.-1:51 a.m.

2 stops18h 11m

Montreal Pierre Elliott Trudeau Intl

Sun 13/7

7:30 p.m.-6:30 a.m.

1 stop30h 00m

C$ 590

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Wed 9/7

12:40 p.m.-12:41 a.m.

2 stops17h 01m

Montreal Pierre Elliott Trudeau Intl

Sun 13/7

6:55 p.m.-6:30 a.m.

Nonstop6h 35m

C$ 591

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Fri 12/9

3:40 p.m.-9:55 p.m.

1 stop11h 15m

Toronto Pearson Intl

Fri 19/9

8:50 p.m.-2:40 p.m.

1 stop12h 50m

C$ 598

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Fri 9/5

8:30 a.m.-7:45 p.m.

2 stops16h 15m

Montreal Pierre Elliott Trudeau Intl

Sat 17/5

9:15 a.m.-6:45 a.m.

2 stops16h 30m

C$ 613

LondonToronto

STN - YYZ

STNYYZ

London Stansted

Thu 8/5

6:55 a.m.-2:10 p.m.

1 stop12h 15m

Toronto Pearson Intl

Tue 20/5

10:15 p.m.-7:55 p.m.

1 stop16h 40m

C$ 617

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Tue 13/5

8:45 a.m.-4:25 p.m.

1 stop12h 40m

Toronto Pearson Intl

Tue 20/5

5:00 p.m.-10:00 a.m.

1 stop12h 00m

C$ 620

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Tue 6/5

8:45 a.m.-4:25 p.m.

1 stop12h 40m

Toronto Pearson Intl

Tue 20/5

6:30 a.m.-9:00 p.m.

1 stop9h 30m

C$ 622

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 1/5

6:30 a.m.-1:20 p.m.

1 stop11h 50m

Toronto Pearson Intl

Thu 8/5

10:30 p.m.-10:40 a.m.

Nonstop7h 10m

C$ 623

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/4

Showing 1-10 of 60 results
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Best time to book a flight from London to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from London with our price prediction graph.
Estimated round-trip 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 London to Ontario

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

Currently, January is the cheapest month in which you can book a flight from London to Region of Ontario (average of C$ 167). Flying from London to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 LON to ON?

Find hourly flight availability from London to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 April 2025.

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

Explore weekly flight availability from London to Ontario. 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 16 April 2025.

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

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Region of Ontario, 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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated 16 April 2025.
Get a feel of what it's like to fly with Delta, KLM and Air Transat from London to Ontario by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,916 reviews
Check prices

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sep 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Delta
8.0
Very good
7,916 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sep 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
KLM
7.8
Good
1,326 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sep 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Air Transat
7.8
Good
385 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sep 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
LOT
7.6
Good
1,065 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sep 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Finnair
7.6
Good
1,269 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sep 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

Related info for your journey

Find useful and relevant information for your journey from London to Ontario. 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 London to Region of Ontario one-way?

    The cheapest airlines for a one-way flight from London to Region of Ontario are WestJet (C$ 409), TAP AIR PORTUGAL (C$ 496), and Air Transat (C$ 560).

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

    The most popular route from London to Region of Ontario is London Heathrow - Toronto Pearson Intl. You may also consider London Gatwick - Toronto Pearson Intl or London City - Toronto Pearson Intl.

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

    No one likes to see their flight delayed. When booking a flight from London to Region of Ontario consider choosing Croatia Airlines (89%), KLM (88%) or Air France (88%) as they are the most reliable in getting you off to your destination on time.

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

    While on average a flight from London to Region of Ontario is generally C$ 1,834, our data shows the cheapest flight currently is C$ 666. When looking at the most popular route, (London Heathrow - Toronto Pearson Intl), you can expect to pay C$ 610 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London to Ontario 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 London to Region of Ontario?

    Currently, January is the cheapest month in which you can book a flight from London to Region of Ontario (average of C$ 167). Flying from London to Region of Ontario in July is currently the most expensive (average of C$ 258). 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

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Alternative routes for London to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Pearson Intl flights
Heathrow to Vancouver Intl flights
Gatwick to Pearson Intl flights
London City to Pearson Intl flights
Gatwick to Vancouver Intl flights
Heathrow to Calgary flights
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Stansted to Pearson Intl flights
Luton to Pearson Intl flights
Heathrow to Pierre Elliott Trudeau Intl flights
Manchester to Pearson Intl flights
Manchester to Vancouver Intl flights
Heathrow to Halifax flights
Gatwick to Calgary flights
Edinburgh to Pearson Intl flights
London City to Calgary flights
Southend to Pearson Intl flights
London City to Pierre Elliott Trudeau Intl flights
Gatwick to Pierre Elliott Trudeau Intl flights
Heathrow to Abbotsford flights
Heathrow to Ottawa flights
Heathrow to Edmonton flights
Luton to Pierre Elliott Trudeau Intl flights
Luton to Calgary flights
Gatwick to Edmonton flights
Stansted to Pierre Elliott Trudeau Intl flights
Edinburgh to Calgary flights
Stansted to Calgary flights
Luton to Vancouver Intl flights
Birmingham to Pearson Intl flights
Gatwick to Halifax flights
Manchester to Abbotsford flights
Gatwick to Ottawa flights
Edinburgh to Vancouver Intl flights
Southend to Pierre Elliott Trudeau Intl flights
Manchester to Calgary flights
Birmingham to Vancouver Intl flights
Heathrow to Victoria flights
Heathrow to Winnipeg flights
Newcastle upon Tyne to Pearson Intl flights

Top 10 airlines flying from London to Ontario

Discover the top 10 airlines that operate flights from London to Ontario. 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 629,999 searches. Data last updated 16 April 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 559AverageC$ 819FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
LufthansaCheapestC$ 596AverageC$ 828FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air TransatCheapestC$ 611AverageC$ 892FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapestC$ 628AverageC$ 1,016FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
British AirwaysCheapestC$ 649AverageC$ 885FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapestC$ 656AverageC$ 818FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapestC$ 665AverageC$ 930FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Air CanadaCheapestC$ 674AverageC$ 964FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 712AverageC$ 1,266FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 715AverageC$ 928FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from London to Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights helps you find that perfect flight to Ontario from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes! Cheapflights helps users easily find flights from London to Ontario with no change fees.

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

Of course! You can now track prices for flights from London to Ontario 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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