What is the cheapest airline that flies from London Heathrow to Ontario?

British Airways and United Airlines are the most popular carriers operating from London Heathrow to Ontario

When did momondo last update prices for flights from London Heathrow Airport to Ontario Airport?

Prices for flights from London Heathrow Airport to Ontario Airport are refreshed on a daily basis.

How old do you have to be to fly from London Heathrow Airport to Ontario Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

€356 Cheap Flights from London Heathrow Airport to Ontario in 2025/26

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Find the cheapest flights from London Heathrow Airport to Los Angeles

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

07:30 - 21:58

LHR

ONT

22h 28m2 stops

13:53 - 07:25

ONT

LHR

33h 32m1 stop

€418United Airlines

Thu, 22 Jan - Mon, 26 Jan

07:30 - 21:58

LHR

ONT

22h 28m2 stops

05:05 - 06:20

ONT

LHR

17h 15m2 stops

€422United Airlines

Thu, 22 Jan - Mon, 26 Jan

20:25 - 16:12

LHR

ONT

27h 47m2 stops

07:30 - 10:30

ONT

LHR

19h 00m1 stop

€423Virgin Atlantic

Mon, 12 Jan - Mon, 26 Jan

07:30 - 20:50

LHR

ONT

20h 20m2 stops

06:00 - 11:20

ONT

LHR

22h 20m2 stops

€424United Airlines

Wed, 11 Mar - Thu, 26 Mar

11:25 - 13:57

LHR

ONT

33h 32m2 stops

17:02 - 13:15

ONT

LHR

13h 13m1 stop

€434British Airways

Mon, 9 Mar - Tue, 24 Mar

10:45 - 21:05

LHR

ONT

18h 20m1 stop

22:20 - 06:25

ONT

LHR

24h 05m1 stop

€437Delta

Tue, 10 Feb - Tue, 17 Feb

12:30 - 21:05

LHR

ONT

16h 35m1 stop

12:41 - 11:40

ONT

LHR

14h 59m1 stop

€438Delta

Mon, 12 Jan - Mon, 26 Jan

12:05 - 21:58

LHR

ONT

17h 53m1 stop

13:24 - 09:40

ONT

LHR

12h 16m1 stop

€444United Airlines

Thu, 8 Jan - Fri, 16 Jan

12:30 - 21:05

LHR

ONT

16h 35m1 stop

13:00 - 09:50

ONT

LHR

12h 50m1 stop

€445KLM

Mon, 2 Mar - Wed, 15 Jul

10:05 - 17:43

LHR

ONT

15h 38m1 stop

13:27 - 11:10

ONT

LHR

13h 43m1 stop

€451United Airlines

Sun, 1 Feb - Tue, 14 Apr

United Airlines flights from London Heathrow Airport to Ontario

Our best United Airlines deals on London Heathrow Airport to Ontario flight tickets

United Airlines

22 Jan

LHR07:30London Heathrow

22h 28m

2 stops

ONT21:58Ontario

26 Jan

ONT13:53Ontario

33h 32m

1 stop

LHR07:25London Heathrow

€418

Find similar

United Airlines

22 Jan

LHR07:30London Heathrow

22h 28m

2 stops

ONT21:58Ontario

26 Jan

ONT05:05Ontario

17h 15m

2 stops

LHR06:20London Heathrow

€422

Find similar

United Airlines

11 Mar

LHR07:30London Heathrow

20h 20m

2 stops

ONT20:50Ontario

26 Mar

ONT06:00Ontario

22h 20m

2 stops

LHR11:20London Heathrow

€424

Find similar

British Airways flights from London Heathrow Airport to Ontario

Our best British Airways deals on London Heathrow Airport to Ontario flight tickets

British Airways

9 Mar

LHR11:25London Heathrow

33h 32m

2 stops

ONT13:57Ontario

24 Mar

ONT17:02Ontario

13h 13m

1 stop

LHR13:15London Heathrow

€434

Find similar

British Airways

16 Jan

LHR10:05London Heathrow

15h 17m

1 stop

ONT17:22Ontario

23 Jan

ONT16:45Ontario

12h 30m

1 stop

LHR13:15London Heathrow

€457

Find similar

British Airways

24 Apr

LHR14:25London Heathrow

16h 10m

1 stop

ONT22:35Ontario

1 May

ONT10:59Ontario

13h 06m

1 stop

LHR08:05London Heathrow

€471

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 22/1

07:30-21:58

2 stops22h 28m

Ontario

Mon 26/1

13:53-07:25

1 stop33h 32m

€418

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 22/1

07:30-21:58

2 stops22h 28m

Ontario

Mon 26/1

05:05-06:20

2 stops17h 15m

€422

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 12/1

20:25-16:12

2 stops27h 47m

Ontario

Mon 26/1

07:30-10:30

1 stop19h 00m

€423

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/3

07:30-20:50

2 stops20h 20m

Ontario

Thu 26/3

06:00-11:20

2 stops22h 20m

€424

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 9/3

11:25-13:57

2 stops33h 32m

Ontario

Tue 24/3

17:02-13:15

1 stop13h 13m

€434

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 10/2

10:45-21:05

1 stop18h 20m

Ontario

Tue 17/2

22:20-06:25

1 stop24h 05m

€437

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 12/1

12:30-21:05

1 stop16h 35m

Ontario

Mon 26/1

12:41-11:40

1 stop14h 59m

€438

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 8/1

12:05-21:58

1 stop17h 53m

Ontario

Fri 16/1

13:24-09:40

1 stop12h 16m

€444

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 2/3

12:30-21:05

1 stop16h 35m

Ontario

Wed 15/7

13:00-09:50

1 stop12h 50m

€445

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 1/2

10:05-17:43

1 stop15h 38m

Ontario

Tue 14/4

13:27-11:10

1 stop13h 43m

€451

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London Heathrow Airport to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Ontario?

If you don’t want to visit Ontario in September, then you should wait until November to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of €558.

How far in advance should I book a flight to Ontario?

You are more likely to see cheaper flights to Ontario from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around €612 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from London Heathrow Airport for as low as €448 on momondo.

When to book flights from London Heathrow Airport to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Ontario according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap London Heathrow Airport to Ontario (LHR to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Ontario

Fastest flight time	15h 14m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 15h 14m

There are no direct flights from London Heathrow Airport to Ontario. There are no popular flight routes from London Heathrow Airport to Ontario.

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How far is London Heathrow to Ontario by plane?
There are 8703.4 km between London Heathrow and Ontario. Flights usually cover this in 15h 14m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London Heathrow Airport to Ontario Airport?
Prices for flights from London Heathrow Airport to Ontario Airport are refreshed on a daily basis.
How old do you have to be to fly from London Heathrow Airport to Ontario Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from London to Ontario?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Ontario for you.

Can I find flights from London to Ontario with flexible booking policies on momondo?

momondo does allow users to show only those flights to Ontario from London which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from London to Ontario?

momondo helps you find the best flight between London and Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from London to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.