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Cheap flights from the United Kingdom to Ontario from £362

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 29/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ONT
12 Jun — 19 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to Ontario

Enter your travel dates to find the best prices.

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 13 May 2026.

Wed 4/1115:00
LHR
-
ONT
1 stop15h 23m
British Airways
Thu 28/115:09
ONT
-
LHR
1 stop12h 51m
British Airways
Deal found 10/5£469
Wed 27/512:25
LHR
-
ONT
2 stops19h 09m
Virgin Atlantic
Tue 2/611:52
ONT
-
LHR
1 stop19h 43m
Virgin Atlantic
Deal found 12/5£469
Wed 4/1110:45
LHR
-
ONT
1 stop13h 27m
Air France
Sat 14/1112:00
ONT
-
LHR
1 stop13h 00m
Air France
Deal found 12/5£477
Mon 1/611:40
LHR
-
ONT
1 stop18h 52m
Virgin Atlantic
Mon 8/607:05
ONT
-
LHR
1 stop15h 20m
Virgin Atlantic
Deal found 10/5£478
Mon 9/1115:00
LHR
-
ONT
1 stop15h 23m
British Airways
Mon 30/1116:47
ONT
-
LHR
1 stop12h 28m
British Airways
Deal found 11/5£479
Tue 22/909:15
LHR
-
ONT
1 stop18h 40m
British Airways
Tue 29/910:25
ONT
-
LHR
1 stop16h 30m
British Airways
Deal found 11/5£480
Wed 3/610:55
LHR
-
ONT
1 stop13h 22m
Virgin Atlantic
Mon 8/606:20
ONT
-
LHR
1 stop25h 15m
Virgin Atlantic
Deal found 12/5£481
Tue 2/608:15
LHR
-
ONT
2 stops23h 44m
Multiple Airlines
Wed 10/610:22
ONT
-
LHR
1 stop18h 28m
Multiple Airlines
Deal found 10/5£483
Mon 17/811:00
LHR
-
ONT
1 stop15h 15m
British Airways
Wed 2/914:27
ONT
-
LHR
1 stop13h 43m
British Airways
Deal found 12/5£484
Tue 11/811:00
LHR
-
ONT
1 stop15h 15m
American Airlines
Tue 18/814:27
ONT
-
LHR
1 stop13h 43m
American Airlines
Deal found 12/5£484
Tue 26/508:40
LHR
-
ONT
2 stops22h 54m
Virgin Atlantic
Tue 2/613:29
ONT
-
LHR
2 stops39h 36m
Virgin Atlantic
Deal found 10/5£485
Wed 3/606:45
LCY
-
ONT
2 stops23h 53m
Multiple Airlines
Mon 8/607:00
ONT
-
LCY
2 stops20h 30m
Multiple Airlines
Deal found 12/5£514

Find 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 13 May 2026.

Round-trip from

£469

One-way from

£362

Popular in

December

Cheapest in

September

Average price

£465
British Airways
  • British Airways
  • 4/11-28/1
  • 2 total stops
  • 28h 14m total
  • United Kingdom to Ontario
Search Deals
29/10
  • 29/10
  • 3 total stops
  • 55h 30m total
  • United Kingdom to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£16 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 13 May 2026.
Use the filters below to find and compare flights from the United Kingdom to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 5/8

11:45-23:34

2 stops19h 49m

Ontario

Thu 13/8

11:56-13:15

1 stop17h 19m

£498
Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 27/5

10:55-16:17

1 stop13h 22m

Ontario

Tue 2/6

17:50-15:35

1 stop13h 45m

£500

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 9/9

14:25-21:08

1 stop14h 43m

Ontario

Thu 5/11

16:47-13:15

1 stop12h 28m

£506

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 3/9

10:35-18:11

1 stop15h 36m

Ontario

Thu 10/9

13:18-09:40

1 stop12h 22m

£512

LondonOntario

LCY - ONT

LCYONT

London City

Wed 27/5

06:45-22:38

2 stops23h 53m

Ontario

Tue 2/6

10:22-13:40

2 stops19h 18m

£516

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 14/8

11:00-18:15

1 stop15h 15m

Ontario

Wed 2/9

14:27-12:10

1 stop13h 43m

£531

LondonOntario

LCY - ONT

LCYONT

London City

Fri 5/6

10:00-23:34

2 stops21h 34m

Ontario

Mon 8/6

17:21-16:40

2 stops15h 19m

£552

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 23/5

17:00-11:10

1 stop26h 10m

Ontario

Mon 1/6

20:11-15:05

1 stop34h 54m

£575

LondonOntario

LCY - ONT

LCYONT

London City

Wed 10/6

09:20-22:41

2 stops21h 21m

Ontario

Tue 30/6

13:00-16:40

2 stops19h 40m

£580

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 1/10

09:30-21:58

2 stops20h 28m

Ontario

Mon 5/10

13:18-12:25

1 stop15h 07m

£607

Flights are sorted by cheapest return flights first.

Deals found on 8/5

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
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6

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 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 the United Kingdom to Ontario

How far ahead should I book a flight from United Kingdom to Ontario?

To ensure you get the cheapest price possible for a flight from United Kingdom to Ontario, you should look to book at least 55 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, December is the cheapest month in which you can book a flight from United Kingdom to Ontario (average of £277). Flying from United Kingdom to Ontario in May is currently the most expensive (average of £413). 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.

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 13 May 2026.
Read through reviews of airlines operating flights from the United Kingdom to Ontario, such as United Airlines,Virgin Atlantic, andBritish Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,709 reviews
Check prices

Comfort

7.3

Boarding

7.7

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
9,709 reviews
United Airlines
7.4
Good
9,709 reviews
Check prices

Comfort

7.3

Boarding

7.7

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Virgin Atlantic
7.4
Good
688 reviews
United Airlines
7.4
Good
9,709 reviews
Check prices

Comfort

7.3

Boarding

7.7

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
British Airways
6.7
Okay
7,977 reviews
United Airlines
7.4
Good
9,709 reviews
Check prices

Comfort

7.3

Boarding

7.7

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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 airport do you fly into for flights to Ontario from United Kingdom?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Ontario from United Kingdom.

  • How long is the flight from United Kingdom to Ontario?

    For as low as £500, Virgin Atlantic can have you in Ontario from United Kingdom in 13h 22m. The distance from United Kingdom to Ontario is about 5407 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most popular routes from United Kingdom to Ontario?

    While some choose either Manchester - Ontario or London Gatwick - Ontario, London Heathrow - Ontario is the most popular route from United Kingdom to Ontario.

  • 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 holiday 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 Ontario?

    Currently, December is the cheapest month in which you can book a flight from United Kingdom to Ontario (average of £277). Flying from United Kingdom to Ontario in May is currently the most expensive (average of £413). 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 United Kingdom to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from United Kingdom to Ontario

Discover the top 3 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 858,174 searches. Data last updated 13 May 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£366Average£471FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£370Average£489FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£376Average£508FlexibilityNo cancel feeOn-time70%
Search British Airways 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 United Kingdom to Ontario?

Deals for United Kingdom to Ontario flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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?

Need flexible booking options for your flight to Ontario from United Kingdom? 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 United Kingdom to Ontario become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ontario from United Kingdom today and book when prices fit your budget.

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