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Cheap flights from London to Ontario from C$ 440

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 18/11. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YYZ
28 Nov — 5 Dec1
1 adult
1 adult, Economy, 0 bags

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 October 2025.

Round-trip from

C$ 653

One-way from

C$ 440

Popular in

December

Cheapest in

February

Average price

C$ 795

Good round-trip deal

C$ 776 or less

Good one-way deal

C$ 560 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 6/12-11/1
  • 2 total stops
  • 37h 40m total
  • London to Ontario
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18/11
  • 18/11
  • 1 total stop
  • 33h 25m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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

Enter your travel dates to find the best prices.

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 October 2025.

Sat 6/127:55 p.m.LHR - YYZ
1 stop23h 30mTAP AIR PORTUGAL
Sun 11/15:30 p.m.YYZ - LHR
1 stop14h 10mTAP AIR PORTUGAL
Deal found 27/10C$ 653
Thu 27/1112:15 p.m.LHR - YYZ
1 stop11h 00mIcelandair
Thu 4/127:40 p.m.YYZ - LHR
1 stop18h 50mIcelandair
Deal found 28/10C$ 654
Tue 9/126:00 a.m.LHR - YYZ
1 stop14h 20mTAP AIR PORTUGAL
Mon 12/110:45 p.m.YYZ - LHR
1 stop13h 45mTAP AIR PORTUGAL
Deal found 28/10C$ 657
Thu 13/1112:15 p.m.LHR - YYZ
1 stop11h 00mIcelandair
Tue 18/117:40 p.m.YYZ - LHR
1 stop10h 10mIcelandair
Deal found 28/10C$ 658
Wed 26/118:35 p.m.LHR - YYZ
1 stop26h 40mIcelandair
Wed 3/127:40 p.m.YYZ - LHR
1 stop10h 10mIcelandair
Deal found 29/10C$ 660
Thu 27/1111:55 a.m.LGW - YYZ
1 stop11h 20mIcelandair
Thu 4/127:40 p.m.YYZ - LGW
1 stop10h 15mIcelandair
Deal found 27/10C$ 660
Fri 5/128:35 p.m.LHR - YYZ
1 stop26h 40mIcelandair
Sun 7/127:40 p.m.YYZ - LHR
1 stop10h 10mIcelandair
Deal found 28/10C$ 665
Thu 27/1111:55 a.m.LGW - YYZ
1 stop11h 20mIcelandair
Wed 3/127:40 p.m.YYZ - LGW
1 stop10h 15mIcelandair
Deal found 29/10C$ 665
Thu 27/1111:55 a.m.LGW - YYZ
1 stop11h 20mIcelandair
Wed 10/127:40 p.m.YYZ - LGW
1 stop10h 15mIcelandair
Deal found 29/10C$ 669
Thu 4/1211:55 a.m.LGW - YYZ
1 stop11h 20mIcelandair
Mon 8/127:40 p.m.YYZ - LGW
1 stop10h 15mIcelandair
Deal found 28/10C$ 671
Thu 27/1112:15 p.m.LHR - YYZ
1 stop11h 00mIcelandair
Wed 10/127:40 p.m.YYZ - LHR
1 stop10h 10mIcelandair
Deal found 29/10C$ 672
Sat 6/1211:55 a.m.LGW - YYZ
1 stop11h 20mIcelandair
Mon 8/127:40 p.m.YYZ - LGW
1 stop10h 15mIcelandair
Deal found 28/10C$ 672

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 October 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

Wed 26/11

11:40 a.m.-6:25 p.m.

1 stop11h 45m

Montreal Pierre Elliott Trudeau Intl

Fri 5/12

2:30 p.m.-9:45 a.m.

1 stop14h 15m

C$ 699

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Sat 8/11

11:40 a.m.-6:25 p.m.

1 stop11h 45m

Montreal Pierre Elliott Trudeau Intl

Fri 14/11

2:30 p.m.-9:45 a.m.

1 stop14h 15m

C$ 700

LondonToronto

STN - YYZ

STNYYZ

London Stansted

Wed 3/12

6:30 a.m.-7:45 p.m.

2 stops18h 15m

Toronto Pearson Intl

Mon 8/12

7:45 p.m.-9:20 p.m.

2 stops20h 35m

C$ 710

LondonToronto

STN - YYZ

STNYYZ

London Stansted

Mon 24/11

6:30 a.m.-7:50 p.m.

2 stops18h 20m

Toronto Pearson Intl

Mon 1/12

7:45 p.m.-9:20 p.m.

2 stops20h 35m

C$ 710

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Thu 19/3

11:40 a.m.-9:20 a.m.

1 stop25h 40m

Montreal Pierre Elliott Trudeau Intl

Mon 23/3

10:15 a.m.-9:45 a.m.

1 stop19h 30m

C$ 711

LondonToronto

STN - YYZ

STNYYZ

London Stansted

Tue 11/11

9:45 p.m.-11:15 a.m.

1 stop18h 30m

Toronto Pearson Intl

Tue 18/11

7:35 p.m.-6:20 p.m.

1 stop17h 45m

C$ 715

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Fri 13/2

11:40 a.m.-9:20 a.m.

1 stop26h 40m

Montreal Pierre Elliott Trudeau Intl

Sat 21/2

3:55 p.m.-9:45 a.m.

1 stop12h 50m

C$ 717

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Mon 20/4

9:25 p.m.-7:10 p.m.

1 stop26h 45m

Toronto Pearson Intl

Sun 26/4

8:50 p.m.-8:20 p.m.

1 stop18h 30m

C$ 728

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Mon 1/12

9:00 a.m.-9:35 p.m.

2 stops17h 35m

Toronto Island

Mon 8/12

8:50 a.m.-7:10 a.m.

2 stops17h 20m

C$ 739

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 11/12

9:30 a.m.-4:15 p.m.

1 stop11h 45m

Toronto Pearson Intl

Thu 5/3

11:00 p.m.-11:20 a.m.

Nonstop7h 20m

C$ 753

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

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, March is the cheapest month in which you can book a flight from London to Region of Ontario (average of C$ 485). Flying from London to Region of Ontario in December is currently the most expensive (average of C$ 658). 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 October 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 31% on flights from London to Region of Ontario by exploring options for tickets in the evening.

What is the cheapest day to fly from London to Region of Ontario?

Use this chart to determine the cheapest time to fly round-trip from London to Ontario. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their London to Region of Ontario flight should consider departing on Monday mornings when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from London to Region of Ontario?

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 October 2025.
Read reviews from past customers who have flown Air Transat,Air Canada, andIcelandair from London to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Transat
7.8
Good
469 reviews
Check prices

Boarding

7.9

Overall

7.8

Entertainment

7.1

Crew

8.5

Comfort

7.4

Food

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Air Transat
7.8
Good
469 reviews
Air Transat
7.8
Good
469 reviews
Check prices

Boarding

7.9

Overall

7.8

Entertainment

7.1

Crew

8.5

Comfort

7.4

Food

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Air Canada
7.1
Good
10,372 reviews
Air Transat
7.8
Good
469 reviews
Check prices

Boarding

7.9

Overall

7.8

Entertainment

7.1

Crew

8.5

Comfort

7.4

Food

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Icelandair
7.1
Good
562 reviews
Air Transat
7.8
Good
469 reviews
Check prices

Boarding

7.9

Overall

7.8

Entertainment

7.1

Crew

8.5

Comfort

7.4

Food

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Lufthansa
6.8
Okay
7,539 reviews
Air Transat
7.8
Good
469 reviews
Check prices

Boarding

7.9

Overall

7.8

Entertainment

7.1

Crew

8.5

Comfort

7.4

Food

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
British Airways
6.7
Okay
7,485 reviews
Air Transat
7.8
Good
469 reviews
Check prices

Boarding

7.9

Overall

7.8

Entertainment

7.1

Crew

8.5

Comfort

7.4

Food

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.

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.

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

    Departing from London to Region of Ontario will take you 11h 45m. There are 5243 km between London and Region of Ontario. Both multi-stop and direct flights can be found to your destination and back.

  • 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$ 482), TAP AIR PORTUGAL (C$ 486), and Delta (C$ 500).

  • 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 Ethiopian Air (85%), Thai Airways (84%) or Egyptair (82%) 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$ 1,670, our data shows the cheapest flight currently is C$ 512. When looking at the most popular route, (London Heathrow - Toronto Pearson Intl), you can expect to pay C$ 625 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, March is the cheapest month in which you can book a flight from London to Region of Ontario (average of C$ 485). Flying from London to Region of Ontario in December is currently the most expensive (average of C$ 658). 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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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 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapestC$ 445AverageC$ 1,084FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapestC$ 564AverageC$ 754FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
LufthansaCheapestC$ 574AverageC$ 895FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air TransatCheapestC$ 606AverageC$ 860FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Virgin AtlanticCheapestC$ 637AverageC$ 828FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapestC$ 648AverageC$ 861FlexibilityNo cancel feeOn-time70%
Search British Airways flights
TAP AIR PORTUGALCheapestC$ 659AverageC$ 997FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air CanadaCheapestC$ 660AverageC$ 948FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 715AverageC$ 783FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 736AverageC$ 1,252FlexibilityNo cancel feeOn-time69%
Search United 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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