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 €609 to €768. The lowest price recently found on this route was €483.

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Find the cheapest flights from London Heathrow Airport to Los Angeles

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

07:25 - 22:51

LHR

ONT

23h 26m

2 stops

06:10 - 06:45

ONT

LHR

16h 35m

1 stop

€483United Airlines

Wed, 8 Jul - Mon, 13 Jul

09:30 - 20:06

LHR

ONT

18h 36m

2 stops

09:00 - 07:25

ONT

LHR

14h 25m

1 stop

€484United Airlines

Fri, 20 Nov - Sat, 28 Nov

09:30 - 21:55

LHR

ONT

20h 25m

2 stops

13:50 - 14:10

ONT

LHR

16h 20m

1 stop

€485United Airlines

Wed, 8 Jul - Thu, 16 Jul

09:30 - 21:55

LHR

ONT

20h 25m

2 stops

06:10 - 11:55

ONT

LHR

21h 45m

1 stop

€489United Airlines

Wed, 8 Jul - Wed, 22 Jul

09:30 - 20:53

LHR

ONT

19h 23m

2 stops

06:00 - 11:10

ONT

LHR

21h 10m

1 stop

€490United Airlines

Thu, 27 Aug - Wed, 9 Sep

13:40 - 21:55

LHR

ONT

16h 15m

1 stop

13:18 - 09:40

ONT

LHR

12h 22m

1 stop

€511United Airlines

Thu, 2 Jul - Sun, 12 Jul

13:40 - 21:55

LHR

ONT

16h 15m

1 stop

13:18 - 12:35

ONT

LHR

15h 17m

1 stop

€512United Airlines

Thu, 2 Jul - Wed, 8 Jul

11:25 - 20:58

LHR

ONT

17h 33m

1 stop

13:24 - 09:40

ONT

LHR

12h 16m

1 stop

€512United Airlines

Fri, 25 Sep - Wed, 30 Sep

11:25 - 12:12

LHR

ONT

32h 47m

2 stops

05:00 - 05:55

ONT

LHR

16h 55m

2 stops

€516United Airlines

Tue, 7 Jul - Tue, 28 Jul

11:25 - 20:58

LHR

ONT

17h 33m

1 stop

13:24 - 09:40

ONT

LHR

12h 16m

1 stop

€517United Airlines

Wed, 30 Sep - Thu, 8 Oct

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United Airlines flights from London Heathrow Airport to Ontario

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

United Airlines

8 Jul

LHR07:25London Heathrow

23h 26m

2 stops

ONT22:51Ontario

13 Jul

ONT06:10Ontario

16h 35m

1 stop

LHR06:45London Heathrow

€483

United Airlines

20 Nov

LHR09:30London Heathrow

18h 36m

2 stops

ONT20:06Ontario

28 Nov

ONT09:00Ontario

14h 25m

1 stop

LHR07:25London Heathrow

€484

United Airlines

8 Jul

LHR09:30London Heathrow

20h 25m

2 stops

ONT21:55Ontario

16 Jul

ONT13:50Ontario

16h 20m

1 stop

LHR14:10London Heathrow

€485

Delta flights from London Heathrow Airport to Ontario

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

Delta

13 Aug

LHR13:25London Heathrow

16h 27m

1 stop

ONT21:52Ontario

15 Aug

ONT17:05Ontario

33h 15m

2 stops

LHR10:20London Heathrow

€594

Delta

8 Sept

LHR10:55London Heathrow

19h 09m

1 stop

ONT22:04Ontario

20 Sept

ONT18:00Ontario

13h 35m

1 stop

LHR15:35London Heathrow

€597

Delta

24 Aug

LHR13:25London Heathrow

16h 27m

1 stop

ONT21:52Ontario

23 Dec

ONT13:00Ontario

13h 00m

1 stop

LHR10:00London Heathrow

€600

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

Wed 8/7

07:25-22:51

2 stops23h 26m

Ontario

Mon 13/7

06:10-06:45

1 stop16h 35m

€483

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 20/11

09:30-20:06

2 stops18h 36m

Ontario

Sat 28/11

09:00-07:25

1 stop14h 25m

€484

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 8/7

09:30-21:55

2 stops20h 25m

Ontario

Thu 16/7

13:50-14:10

1 stop16h 20m

€485

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 8/7

09:30-21:55

2 stops20h 25m

Ontario

Wed 22/7

06:10-11:55

1 stop21h 45m

€489

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 27/8

09:30-20:53

2 stops19h 23m

Ontario

Wed 9/9

06:00-11:10

1 stop21h 10m

€490

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 2/7

13:40-21:55

1 stop16h 15m

Ontario

Sun 12/7

13:18-09:40

1 stop12h 22m

€511

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 2/7

13:40-21:55

1 stop16h 15m

Ontario

Wed 8/7

13:18-12:35

1 stop15h 17m

€512

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 25/9

11:25-20:58

1 stop17h 33m

Ontario

Wed 30/9

13:24-09:40

1 stop12h 16m

€512

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 7/7

11:25-12:12

2 stops32h 47m

Ontario

Tue 28/7

05:00-05:55

2 stops16h 55m

€516

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 30/9

11:25-20:58

1 stop17h 33m

Ontario

Thu 8/10

13:24-09:40

1 stop12h 16m

€517

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 €482.

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	13h 52m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 13h 52m

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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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 13h 52m, 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.