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.

€417 Cheap Flights from London Heathrow Airport to Ontario in 2026

Q: What is the typical price of a round-trip flight between London Heathrow Airport and Ontario?

Prices are currently low for flights on this route. Typical prices usually range from €810 to €543. The lowest price recently found on this route was €551.

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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.

06:30 - 17:16

LHR

ONT

18h 46m

2 stops

07:00 - 06:25

ONT

LHR

15h 25m

1 stop

€551Delta

Fri, 18 Sep - Fri, 2 Oct

07:25 - 17:52

LHR

ONT

18h 27m

2 stops

13:30 - 11:10

ONT

LHR

13h 40m

1 stop

€561United Airlines

Tue, 12 May - Tue, 19 May

07:25 - 22:59

LHR

ONT

23h 34m

2 stops

05:00 - 06:30

ONT

LHR

41h 30m

3 stops

€563United Airlines

Tue, 12 May - Tue, 19 May

11:00 - 18:15

LHR

ONT

15h 15m

1 stop

12:59 - 11:05

ONT

LHR

14h 06m

1 stop

€567British Airways

Mon, 10 Aug - Mon, 24 Aug

11:00 - 18:22

LHR

ONT

15h 22m

1 stop

13:10 - 15:05

ONT

LHR

17h 55m

1 stop

€567British Airways

Mon, 25 May - Mon, 8 Jun

16:25 - 23:46

LHR

ONT

15h 21m

1 stop

10:29 - 09:00

ONT

LHR

14h 31m

1 stop

€568British Airways

Mon, 18 May - Mon, 7 Sep

10:55 - 16:35

LHR

ONT

13h 40m

1 stop

18:01 - 15:35

ONT

LHR

13h 34m

1 stop

€569Delta

Wed, 22 Jul - Tue, 28 Jul

11:00 - 18:15

LHR

ONT

15h 15m

1 stop

14:27 - 12:10

ONT

LHR

13h 43m

1 stop

€570British Airways

Mon, 17 Aug - Tue, 8 Sep

10:55 - 16:42

LHR

ONT

13h 47m

1 stop

13:42 - 12:10

ONT

LHR

14h 28m

1 stop

€573Delta

Thu, 2 Jul - Tue, 14 Jul

14:25 - 22:40

LHR

ONT

16h 15m

1 stop

14:27 - 12:10

ONT

LHR

13h 43m

1 stop

€573British Airways

Tue, 19 May - Mon, 7 Sep

Delta flights from London Heathrow Airport to Ontario

Our best Delta deals on London Heathrow Airport to Ontario flight tickets

Delta

18 Sept

LHR06:30London Heathrow

18h 46m

2 stops

ONT17:16Ontario

2 Oct

ONT07:00Ontario

15h 25m

1 stop

LHR06:25London Heathrow

€551

Delta

22 Jul

LHR10:55London Heathrow

13h 40m

1 stop

ONT16:35Ontario

28 Jul

ONT18:01Ontario

13h 34m

1 stop

LHR15:35London Heathrow

€569

Delta

2 Jul

LHR10:55London Heathrow

13h 47m

1 stop

ONT16:42Ontario

14 Jul

ONT13:42Ontario

14h 28m

1 stop

LHR12:10London Heathrow

€573

United Airlines flights from London Heathrow Airport to Ontario

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

United Airlines

12 May

LHR07:25London Heathrow

18h 27m

2 stops

ONT17:52Ontario

19 May

ONT13:30Ontario

13h 40m

1 stop

LHR11:10London Heathrow

€561

United Airlines

12 May

LHR07:25London Heathrow

23h 34m

2 stops

ONT22:59Ontario

19 May

ONT05:00Ontario

41h 30m

3 stops

LHR06:30London Heathrow

€563

United Airlines

5 May

LHR14:50London Heathrow

13h 46m

1 stop

ONT20:36Ontario

16 May

ONT13:40Ontario

14h 45m

1 stop

LHR12:25London Heathrow

€588

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

Cheapest return flight

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 18/9

06:30-17:16

2 stops18h 46m

Ontario

Fri 2/10

07:00-06:25

1 stop15h 25m

€551

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 12/5

07:25-17:52

2 stops18h 27m

Ontario

Tue 19/5

13:30-11:10

1 stop13h 40m

€561

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 12/5

07:25-22:59

2 stops23h 34m

Ontario

Tue 19/5

05:00-06:30

3 stops41h 30m

€563

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 10/8

11:00-18:15

1 stop15h 15m

Ontario

Mon 24/8

12:59-11:05

1 stop14h 06m

€567

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 25/5

11:00-18:22

1 stop15h 22m

Ontario

Mon 8/6

13:10-15:05

1 stop17h 55m

€567

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 18/5

16:25-23:46

1 stop15h 21m

Ontario

Mon 7/9

10:29-09:00

1 stop14h 31m

€568

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 22/7

10:55-16:35

1 stop13h 40m

Ontario

Tue 28/7

18:01-15:35

1 stop13h 34m

€569

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 17/8

11:00-18:15

1 stop15h 15m

Ontario

Tue 8/9

14:27-12:10

1 stop13h 43m

€570

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 2/7

10:55-16:42

1 stop13h 47m

Ontario

Tue 14/7

13:42-12:10

1 stop14h 28m

€573

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 19/5

14:25-22:40

1 stop16h 15m

Ontario

Mon 7/9

14:27-12:10

1 stop13h 43m

€573

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 typical price of a round-trip flight between London Heathrow Airport and Ontario?

What is the cheapest month to fly to Ontario?

If you don’t want to visit Ontario in February, then you should wait until January to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of €473.

How far in advance should I book a flight from London Heathrow Airport 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 €576 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 €424 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	16h 11m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 16h 11m

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

Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Ontario

How far is London Heathrow to Ontario by plane?
There are 8703.4 km between London Heathrow and Ontario. Flights usually cover this in 16h 11m, 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.