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Cheap flights from the United Kingdom to Ontario from C$ 399

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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YYZ
20 Apr — 27 Apr1
1 adult

Cheap flight deals from United Kingdom to Ontario

Keep the following information in mind while searching for United Kingdom to Ontario flight deals. Data was last updated 15 April 2025.

Round-trip from

C$ 567

One-way from

C$ 399

Popular in

August

Cheapest in

February

Average price

C$ 763

Good round-trip deal

C$ 715 or less

Good one-way deal

C$ 385 or less
Air Transat
  • Air Transat
  • 16/5-21/5
  • 1 total stop
  • 37h 35m total
  • United Kingdom to Ontario
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WestJet
  • WestJet
  • 10/5
  • 1 total stop
  • 11h 25m total
  • United Kingdom to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 162 potential increase over avg. RT price).
Search Deals
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 United Kingdom to Ontario.
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Price to beat on a one-way flight from United Kingdom to Ontario.
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Find flight deals from United Kingdom to Ontario

Cheapest flights from United Kingdom to Ontario
Explore the most affordable flight options available from United Kingdom to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.

Fri 16/512:40 p.m.LGW - YYZ
Nonstop8h 00mAir Transat
Wed 21/511:15 p.m.YYZ - LGW
1 stop29h 35mAir Transat
Deal found 15/4C$ 567
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
Thu 8/53:40 p.m.LGW - YYZ
1 stop11h 15mIcelandair
Tue 13/511:00 p.m.YYZ - LGW
1 stop10h 40mIcelandair
Deal found 15/4C$ 581
Wed 9/712:40 p.m.LHR - YUL
2 stops18h 11mAir Canada
Sun 13/77:30 p.m.YUL - LHR
1 stop30h 00mAir Canada
Deal found 15/4C$ 590
Wed 9/712:40 p.m.LHR - YUL
2 stops17h 01mMultiple Airlines
Sun 13/76:55 p.m.YUL - LHR
Nonstop6h 35mMultiple Airlines
Deal found 15/4C$ 591
Fri 9/511:35 a.m.LGW - YUL
Nonstop7h 40mAir Transat
Sat 17/510:05 p.m.YUL - LGW
Nonstop6h 45mAir Transat
Deal found 15/4C$ 594
Wed 30/48:40 a.m.LHR - YYZ
1 stop12h 40mAir Canada
Wed 7/53:00 p.m.YYZ - LHR
1 stop10h 30mAir Canada
Deal found 15/4C$ 612
Fri 9/58:30 a.m.LHR - YUL
2 stops16h 15mUnited Airlines
Sat 17/59:15 a.m.YUL - LHR
2 stops16h 30mUnited Airlines
Deal found 15/4C$ 613
Fri 25/46:00 a.m.LHR - YYZ
1 stop15h 20mMultiple Airlines
Fri 2/53:00 p.m.YYZ - LHR
1 stop10h 30mMultiple Airlines
Deal found 15/4C$ 615
Thu 1/56:30 a.m.LHR - YYZ
1 stop11h 50mKLM
Sun 4/510:30 p.m.YYZ - LHR
Nonstop7h 10mKLM
Deal found 14/4C$ 617
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
Wed 30/46:15 a.m.LHR - YYZ
1 stop14h 25mBritish Airways
Wed 7/510:00 p.m.YYZ - LHR
Nonstop7h 15mBritish Airways
Deal found 15/4C$ 620

Cheapflights Fare Finder

Customize your flight search to find flights from United Kingdom 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 15 April 2025.
Use the filters below to find and compare flights from the United Kingdom to Ontario that are best for you.

Fly from

United Kingdom

Fly to

Ontario

Route

Depart

Return

Price

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Fri 16/5

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

Nonstop8h 00m

Toronto Pearson Intl

Wed 21/5

11:15 p.m.-9:50 a.m.

1 stop29h 35m

C$ 567

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

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Thu 8/5

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

1 stop11h 15m

Toronto Pearson Intl

Tue 13/5

11:00 p.m.-2:40 p.m.

1 stop10h 40m

C$ 581

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

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Fri 9/5

11:35 a.m.-2:15 p.m.

Nonstop7h 40m

Montreal Pierre Elliott Trudeau Intl

Sat 17/5

10:05 p.m.-9:50 a.m.

Nonstop6h 45m

C$ 594

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Wed 30/4

8:40 a.m.-4:20 p.m.

1 stop12h 40m

Toronto Pearson Intl

Wed 7/5

3:00 p.m.-6:30 a.m.

1 stop10h 30m

C$ 612

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

LHR - YYZ

LHRYYZ

London Heathrow

Fri 25/4

6:00 a.m.-4:20 p.m.

1 stop15h 20m

Toronto Pearson Intl

Fri 2/5

3:00 p.m.-6:30 a.m.

1 stop10h 30m

C$ 615

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 1/5

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

1 stop11h 50m

Toronto Pearson Intl

Sun 4/5

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

Nonstop7h 10m

C$ 617

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 United Kingdom to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from United Kingdom 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 the United Kingdom to Ontario

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

Currently, January is the cheapest month in which you can book a flight from United Kingdom to Region of Ontario (average of C$ 167). Flying from United Kingdom 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 GB to ON?

Find hourly flight availability from United Kingdom 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 15 April 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from United Kingdom to Region of Ontario as you normally would.

Weekly flight availability from United Kingdom to Region of Ontario

Explore weekly flight availability from United Kingdom 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 15 April 2025.

The most flights from GB0 to CAON are scheduled on a Tuesday (39 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (29 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 15 April 2025.
To help decide which airline to fly from United Kingdom to Ontario, see what other customers have to say about Delta, KLM and Air Transat. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,917 reviews
Check prices

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

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
7,917 reviews
Delta
8.0
Very good
7,917 reviews
Check prices

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

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
1,323 reviews
Delta
8.0
Very good
7,917 reviews
Check prices

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

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
7,917 reviews
Check prices

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

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
7,917 reviews
Check prices

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

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
Azores Airlines
7.5
Good
65 reviews
Delta
8.0
Very good
7,917 reviews
Check prices

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

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 United Kingdom 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 United Kingdom to Region of Ontario one-way?

    One-way options have recently been found by users for as low as C$ 399 on WestJet. Other airlines that offer cheap prices include TAP AIR PORTUGAL from C$ 487 and Air Transat from C$ 540 one-way.

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

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

  • How can I find direct flights from United Kingdom to Ontario?

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

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

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

    Currently, January is the cheapest month in which you can book a flight from United Kingdom to Region of Ontario (average of C$ 167). Flying from United Kingdom 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for United Kingdom 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 United Kingdom to Ontario

Discover the top 10 airlines that operate flights from United Kingdom 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 15 April 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 559AverageC$ 937FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
LufthansaCheapestC$ 596AverageC$ 992FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air TransatCheapestC$ 611AverageC$ 946FlexibilityNo 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$ 995FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapestC$ 656AverageC$ 818FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
WestJetCheapestC$ 656AverageC$ 843FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Aer LingusCheapestC$ 657AverageC$ 1,175FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapestC$ 665AverageC$ 930FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Air CanadaCheapestC$ 674AverageC$ 1,058FlexibilityNo cancel feeOn-time67%
Search Air Canada 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 United Kingdom to Ontario?

When you search for this flight from United Kingdom to Ontario, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights simply makes it quick and affordable to book flights from United Kingdom to Ontario by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Yes, we can. To see specific flights from United Kingdom to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes! Start tracking prices for United Kingdom to Ontario flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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