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Cheap flights from London to Ontario from C$ 454

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YYZ
3 Aug — 10 Aug1
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 29 July 2025.

Round-trip from

C$ 635

One-way from

C$ 454

Popular in

December

Cheapest in

February

Average price

C$ 969

Good round-trip deal

C$ 738 or less

Good one-way deal

C$ 469 or less
Air Transat
  • Air Transat
  • 4/9-8/9
  • 2 total stops
  • 21h 10m total
  • London to Ontario
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Air Transat
  • Air Transat
  • 1/10
  • 1 total stop
  • 11h 40m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 28 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from London (LON) to Ontario.
Search Deals
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 29 July 2025.

Thu 4/912:40 p.m.LGW - YUL
1 stop11h 40mAir Transat
Mon 8/98:15 p.m.YUL - LGW
1 stop9h 30mAir Transat
Deal found 28/7C$ 635
Sat 20/95:40 p.m.LHR - YUL
1 stop32h 13mLufthansa
Mon 22/98:40 p.m.YUL - LHR
1 stop21h 00mLufthansa
Deal found 29/7C$ 637
Wed 24/96:00 a.m.LHR - YUL
1 stop14h 00mSWISS
Wed 15/104:40 p.m.YUL - LHR
1 stop13h 45mSWISS
Deal found 27/7C$ 638
Fri 19/96:00 a.m.LHR - YYZ
1 stop12h 50mAir Canada
Mon 29/98:30 p.m.YYZ - LHR
Nonstop7h 05mAir Canada
Deal found 27/7C$ 649
Sun 31/81:10 p.m.LGW - YTZ
1 stop26h 12mAir Transat
Fri 12/96:55 p.m.YTZ - LGW
1 stop9h 55mAir Transat
Deal found 28/7C$ 649
Fri 29/812:40 p.m.LGW - YYZ
Nonstop8h 00mAir Transat
Tue 9/97:50 p.m.YYZ - LGW
Nonstop7h 05mAir Transat
Deal found 27/7C$ 649
Sat 6/96:50 a.m.LHR - YTZ
2 stops12h 55mMultiple Airlines
Sat 13/97:25 a.m.YTZ - LHR
1 stop18h 05mMultiple Airlines
Deal found 27/7C$ 650
Wed 24/91:30 p.m.LHR - YYZ
1 stop11h 15mLufthansa
Tue 30/96:20 p.m.YYZ - LHR
Nonstop7h 15mLufthansa
Deal found 28/7C$ 652
Thu 4/96:50 a.m.LHR - YTZ
2 stops12h 55mAir Canada
Sat 13/93:25 p.m.YTZ - LHR
1 stop10h 05mAir Canada
Deal found 27/7C$ 652
Wed 17/99:05 a.m.STN - YYZ
2 stops15h 05mMultiple Airlines
Tue 30/98:50 p.m.YYZ - STN
2 stops14h 45mMultiple Airlines
Deal found 28/7C$ 653
Thu 11/99:00 a.m.LHR - YYZ
1 stop14h 30mMultiple Airlines
Wed 17/911:35 p.m.YYZ - LHR
Nonstop7h 15mMultiple Airlines
Deal found 27/7C$ 656
Thu 11/910:30 a.m.LHR - YUL
1 stop10h 30mMultiple Airlines
Thu 18/94:40 p.m.YUL - LHR
1 stop13h 45mMultiple Airlines
Deal found 27/7C$ 656

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 29 July 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

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Thu 4/9

12:40 p.m.-7:20 p.m.

1 stop11h 40m

Montreal Pierre Elliott Trudeau Intl

Mon 8/9

8:15 p.m.-10:45 a.m.

1 stop9h 30m

C$ 635

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Sat 20/9

5:40 p.m.-8:53 p.m.

1 stop32h 13m

Montreal Pierre Elliott Trudeau Intl

Mon 22/9

8:40 p.m.-10:40 p.m.

1 stop21h 00m

C$ 637

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Wed 24/9

6:00 a.m.-3:00 p.m.

1 stop14h 00m

Montreal Pierre Elliott Trudeau Intl

Wed 15/10

4:40 p.m.-11:25 a.m.

1 stop13h 45m

C$ 638

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Fri 19/9

6:00 a.m.-1:50 p.m.

1 stop12h 50m

Toronto Pearson Intl

Mon 29/9

8:30 p.m.-8:35 a.m.

Nonstop7h 05m

C$ 649

LondonToronto

LGW - YTZ

LGWYTZ

London Gatwick

Sun 31/8

1:10 p.m.-10:22 a.m.

1 stop26h 12m

Toronto Island

Fri 12/9

6:55 p.m.-9:50 a.m.

1 stop9h 55m

C$ 649

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Fri 29/8

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

Nonstop8h 00m

Toronto Pearson Intl

Tue 9/9

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

Nonstop7h 05m

C$ 649

LondonToronto

STN - YYZ

STNYYZ

London Stansted

Tue 2/9

8:15 a.m.-2:10 p.m.

1 stop10h 55m

Toronto Pearson Intl

Wed 10/9

10:10 p.m.-12:45 p.m.

1 stop9h 35m

C$ 650

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Sat 6/9

6:50 a.m.-2:45 p.m.

2 stops12h 55m

Toronto Island

Sat 13/9

7:25 a.m.-6:30 a.m.

1 stop18h 05m

C$ 650

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Wed 24/9

1:30 p.m.-7:45 p.m.

1 stop11h 15m

Toronto Pearson Intl

Tue 30/9

6:20 p.m.-6:35 a.m.

Nonstop7h 15m

C$ 652

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Thu 4/9

6:50 a.m.-2:45 p.m.

2 stops12h 55m

Toronto Island

Sat 13/9

3:25 p.m.-6:30 a.m.

1 stop10h 05m

C$ 652

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Showing 1-10 of 52 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 29 July 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 29 July 2025.

The most flights from LON to CAON are scheduled on a Monday (43 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (27 on average).

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 29 July 2025.
Read reviews from past customers who have flown Air Transat,Austrian Airlines, andSWISS from London to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Transat
7.7
Good
424 reviews
Check prices

Boarding

7.9

Overall

7.7

Comfort

7.3

Food

6.7

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Air Transat
7.7
Good
424 reviews
Air Transat
7.7
Good
424 reviews
Check prices

Boarding

7.9

Overall

7.7

Comfort

7.3

Food

6.7

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Austrian Airlines
7.6
Good
821 reviews
Air Transat
7.7
Good
424 reviews
Check prices

Boarding

7.9

Overall

7.7

Comfort

7.3

Food

6.7

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
SWISS
7.5
Good
1,683 reviews
Air Transat
7.7
Good
424 reviews
Check prices

Boarding

7.9

Overall

7.7

Comfort

7.3

Food

6.7

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
WestJet
7.2
Good
2,972 reviews
Air Transat
7.7
Good
424 reviews
Check prices

Boarding

7.9

Overall

7.7

Comfort

7.3

Food

6.7

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Air Canada
7.1
Good
9,826 reviews
Air Transat
7.7
Good
424 reviews
Check prices

Boarding

7.9

Overall

7.7

Comfort

7.3

Food

6.7

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.

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 Air Transat (C$ 454), WestJet (C$ 468), and TAP AIR PORTUGAL (C$ 486).

  • 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 Thai Airways (85%), Ethiopian Air (83%) or Air Canada (81%) 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$ 2,865, our data shows the cheapest flight currently is C$ 667. When looking at the most popular route, (London Heathrow - Toronto Pearson Intl), you can expect to pay C$ 584 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.
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Stansted to Calgary flights
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Manchester to Pierre Elliott Trudeau Intl flights
Southampton to Pearson Intl flights
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Heathrow to Winnipeg flights
Edinburgh to Calgary flights
Gatwick to Québec City 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 29 July 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapestC$ 562AverageC$ 919FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air TransatCheapestC$ 595AverageC$ 848FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
IcelandairCheapestC$ 609AverageC$ 846FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapestC$ 644AverageC$ 849FlexibilityNo cancel feeOn-time70%
Search British Airways flights
TAP AIR PORTUGALCheapestC$ 647AverageC$ 993FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapestC$ 647AverageC$ 815FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
DeltaCheapestC$ 647AverageC$ 767FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapestC$ 651AverageC$ 1,020FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 703AverageC$ 1,249FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 705AverageC$ 919FlexibilityNo 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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