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

British Airways, United Airlines, and Alaska 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.

€418 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 €626 to €756. The lowest price recently found on this route was €581.

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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.

10:45 - 16:12

LHR

ONT

13h 27m

1 stop

12:00 - 09:00

ONT

LHR

13h 00m

1 stop

€581Multiple Airlines

Tue, 15 Dec - Fri, 8 Jan

12:20 - 22:43

LHR

ONT

18h 23m

1 stop

12:00 - 09:00

ONT

LHR

13h 00m

1 stop

€584Delta

Fri, 11 Dec - Wed, 6 Jan

12:30 - 20:18

LHR

ONT

15h 48m

1 stop

12:00 - 09:00

ONT

LHR

13h 00m

1 stop

€587Multiple Airlines

Tue, 3 Nov - Thu, 12 Nov

13:25 - 21:52

LHR

ONT

16h 27m

1 stop

18:00 - 15:35

ONT

LHR

13h 35m

1 stop

€588Delta

Fri, 28 Aug - Sat, 12 Sep

08:40 - 22:40

LHR

ONT

22h 00m

2 stops

06:00 - 07:05

ONT

LHR

17h 05m

2 stops

€591Delta

Fri, 11 Sep - Thu, 12 Nov

10:45 - 16:12

LHR

ONT

13h 27m

1 stop

12:00 - 09:00

ONT

LHR

13h 00m

1 stop

€592Multiple Airlines

Tue, 15 Dec - Fri, 8 Jan

12:30 - 22:01

LHR

ONT

16h 31m

1 stop

12:18 - 11:40

ONT

LHR

15h 22m

1 stop

€596Delta

Thu, 29 Oct - Sat, 7 Nov

08:55 - 18:13

LHR

ONT

16h 18m

1 stop

12:00 - 09:00

ONT

LHR

13h 00m

1 stop

€597Delta

Thu, 29 Oct - Tue, 10 Nov

06:15 - 17:21

LHR

ONT

19h 06m

2 stops

11:56 - 15:35

ONT

LHR

19h 39m

1 stop

€598Delta

Wed, 29 Jul - Wed, 5 Aug

12:30 - 20:18

LHR

ONT

15h 48m

1 stop

12:00 - 09:00

ONT

LHR

13h 00m

1 stop

€599Multiple Airlines

Wed, 4 Nov - Wed, 11 Nov

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KLM flights from London Heathrow Airport to Ontario

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

KLM

12 Sept

LHR10:55London Heathrow

13h 40m

1 stop

ONT16:35Ontario

21 Sept

ONT13:04Ontario

12h 56m

1 stop

LHR10:00London Heathrow

€602

KLM

12 Sept

LHR10:55London Heathrow

13h 40m

1 stop

ONT16:35Ontario

19 Sept

ONT13:04Ontario

12h 56m

1 stop

LHR10:00London Heathrow

€606

KLM

30 Sept

LHR10:55London Heathrow

13h 40m

1 stop

ONT16:35Ontario

14 Oct

ONT13:17Ontario

12h 43m

1 stop

LHR10:00London Heathrow

€607

British Airways flights from London Heathrow Airport to Ontario

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

British Airways

29 Oct

LHR13:15London Heathrow

15h 39m

1 stop

ONT21:54Ontario

8 Nov

ONT14:59Ontario

13h 01m

1 stop

LHR12:00London Heathrow

€644

British Airways

1 Oct

LHR16:10London Heathrow

14h 33m

1 stop

ONT22:43Ontario

15 Oct

ONT13:31Ontario

12h 59m

1 stop

LHR10:30London Heathrow

€649

British Airways

21 Aug

LHR08:55London Heathrow

17h 52m

1 stop

ONT18:47Ontario

6 Sept

ONT07:05Ontario

17h 55m

1 stop

LHR09:00London Heathrow

€650

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

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 15/12

10:45-16:12

1 stop13h 27m

Ontario

Fri 8/1

12:00-09:00

1 stop13h 00m

€581

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 11/12

12:20-22:43

1 stop18h 23m

Ontario

Wed 6/1

12:00-09:00

1 stop13h 00m

€584

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 3/11

12:30-20:18

1 stop15h 48m

Ontario

Thu 12/11

12:00-09:00

1 stop13h 00m

€587

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 28/8

13:25-21:52

1 stop16h 27m

Ontario

Sat 12/9

18:00-15:35

1 stop13h 35m

€588

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 11/9

08:40-22:40

2 stops22h 00m

Ontario

Thu 12/11

06:00-07:05

2 stops17h 05m

€591

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 15/12

10:45-16:12

1 stop13h 27m

Ontario

Fri 8/1

12:00-09:00

1 stop13h 00m

€592

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 29/10

12:30-22:01

1 stop16h 31m

Ontario

Sat 7/11

12:18-11:40

1 stop15h 22m

€596

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 29/10

08:55-18:13

1 stop16h 18m

Ontario

Tue 10/11

12:00-09:00

1 stop13h 00m

€597

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 29/7

06:15-17:21

2 stops19h 06m

Ontario

Wed 5/8

11:56-15:35

1 stop19h 39m

€598

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 4/11

12:30-20:18

1 stop15h 48m

Ontario

Wed 11/11

12:00-09:00

1 stop13h 00m

€599

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 €485.

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 €585 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 €435 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	14h 03m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 14h 03m

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 14h 03m, 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.