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

British Airways, United Airlines, and JetBlue 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.

€421 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 €623 to €753. 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

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

06:35 - 20:56

LHR

ONT

22h 21m

2 stops

06:00 - 07:40

ONT

LHR

17h 40m

1 stop

€551United Airlines

Wed, 18 Nov - Thu, 19 Nov

14:50 - 20:53

LHR

ONT

14h 03m

1 stop

13:18 - 09:40

ONT

LHR

12h 22m

1 stop

€562United Airlines

Thu, 20 Aug - Sat, 5 Sep

13:00 - 20:01

LHR

ONT

15h 01m

1 stop

13:52 - 11:10

ONT

LHR

13h 18m

1 stop

€563United Airlines

Thu, 17 Sep - Thu, 24 Sep

13:00 - 20:01

LHR

ONT

15h 01m

1 stop

19:13 - 21:35

ONT

LHR

18h 22m

2 stops

€564United Airlines

Thu, 13 Aug - Sun, 16 Aug

14:50 - 20:53

LHR

ONT

14h 03m

1 stop

13:18 - 09:40

ONT

LHR

12h 22m

1 stop

€569United Airlines

Thu, 20 Aug - Sat, 5 Sep

10:55 - 16:35

LHR

ONT

13h 40m

1 stop

13:04 - 10:00

ONT

LHR

12h 56m

1 stop

€575KLM

Sat, 19 Sep - Fri, 2 Oct

08:45 - 20:01

LHR

ONT

19h 16m

2 stops

06:08 - 07:25

ONT

LHR

17h 17m

1 stop

€577United Airlines

Thu, 27 Aug - Sun, 13 Sep

16:15 - 22:59

LHR

ONT

14h 44m

1 stop

13:24 - 09:40

ONT

LHR

12h 16m

1 stop

€579United Airlines

Mon, 5 Oct - Fri, 9 Oct

10:55 - 16:35

LHR

ONT

13h 40m

1 stop

13:04 - 10:00

ONT

LHR

12h 56m

1 stop

€581KLM

Sat, 26 Sep - Mon, 5 Oct

10:45 - 16:12

LHR

ONT

13h 27m

1 stop

12:00 - 09:00

ONT

LHR

13h 00m

1 stop

€584Multiple Airlines

Wed, 16 Dec - Wed, 6 Jan

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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

18 Nov

LHR06:35London Heathrow

22h 21m

2 stops

ONT20:56Ontario

19 Nov

ONT06:00Ontario

17h 40m

1 stop

LHR07:40London Heathrow

€551

United Airlines

20 Aug

LHR14:50London Heathrow

14h 03m

1 stop

ONT20:53Ontario

5 Sept

ONT13:18Ontario

12h 22m

1 stop

LHR09:40London Heathrow

€562

United Airlines

17 Sept

LHR13:00London Heathrow

15h 01m

1 stop

ONT20:01Ontario

24 Sept

ONT13:52Ontario

13h 18m

1 stop

LHR11:10London Heathrow

€563

Delta flights from London Heathrow Airport to Ontario

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

Delta

5 Sept

LHR06:30London Heathrow

20h 00m

2 stops

ONT18:30Ontario

21 Sept

ONT17:15Ontario

18h 55m

2 stops

LHR20:10London Heathrow

€589

Delta

21 Dec

LHR12:20London Heathrow

18h 23m

1 stop

ONT22:43Ontario

4 Jan

ONT13:00Ontario

13h 00m

1 stop

LHR10:00London Heathrow

€593

Delta

3 Sept

LHR09:55London Heathrow

19h 57m

2 stops

ONT21:52Ontario

16 Sept

ONT11:54Ontario

19h 41m

1 stop

LHR15:35London Heathrow

€597

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 18/11

06:35-20:56

2 stops22h 21m

Ontario

Thu 19/11

06:00-07:40

1 stop17h 40m

€551

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 20/8

14:50-20:53

1 stop14h 03m

Ontario

Sat 5/9

13:18-09:40

1 stop12h 22m

€562

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 17/9

13:00-20:01

1 stop15h 01m

Ontario

Thu 24/9

13:52-11:10

1 stop13h 18m

€563

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 13/8

13:00-20:01

1 stop15h 01m

Ontario

Sun 16/8

19:13-21:35

2 stops18h 22m

€564

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 20/8

14:50-20:53

1 stop14h 03m

Ontario

Sat 5/9

13:18-09:40

1 stop12h 22m

€569

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 19/9

10:55-16:35

1 stop13h 40m

Ontario

Fri 2/10

13:04-10:00

1 stop12h 56m

€575

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 27/8

08:45-20:01

2 stops19h 16m

Ontario

Sun 13/9

06:08-07:25

1 stop17h 17m

€577

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 5/10

16:15-22:59

1 stop14h 44m

Ontario

Fri 9/10

13:24-09:40

1 stop12h 16m

€579

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 26/9

10:55-16:35

1 stop13h 40m

Ontario

Mon 5/10

13:04-10:00

1 stop12h 56m

€581

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 16/12

10:45-16:12

1 stop13h 27m

Ontario

Wed 6/1

12:00-09:00

1 stop13h 00m

€584

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 €483.

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	17h 13m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 17h 13m

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 17h 13m, 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.