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.

€407 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 €574 to €726. The lowest price recently found on this route was €499.

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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 - 18:11

LHR

ONT

18h 41m

2 stops

05:00 - 09:40

ONT

LHR

20h 40m

1 stop

€499United Airlines

Sat, 22 Aug - Sat, 12 Sep

10:50 - 22:45

LHR

ONT

19h 55m

2 stops

13:40 - 12:20

ONT

LHR

14h 40m

1 stop

€506United Airlines

Fri, 24 Apr - Fri, 1 May

07:30 - 21:50

LHR

ONT

22h 20m

2 stops

06:00 - 14:10

ONT

LHR

24h 10m

1 stop

€508United Airlines

Mon, 27 Apr - Sat, 9 May

07:25 - 17:47

LHR

ONT

18h 22m

2 stops

10:37 - 11:10

ONT

LHR

16h 33m

1 stop

€508United Airlines

Sun, 26 Apr - Sun, 3 May

09:30 - 21:50

LHR

ONT

20h 20m

2 stops

06:00 - 07:15

ONT

LHR

17h 15m

2 stops

€510United Airlines

Mon, 27 Apr - Sat, 9 May

10:25 - 20:36

LHR

ONT

18h 11m

2 stops

07:00 - 07:15

ONT

LHR

16h 15m

2 stops

€511United Airlines

Fri, 1 May - Tue, 5 May

11:25 - 20:36

LHR

ONT

17h 11m

1 stop

13:30 - 14:10

ONT

LHR

16h 40m

1 stop

€513United Airlines

Mon, 27 Apr - Sat, 9 May

07:30 - 18:11

LHR

ONT

18h 41m

2 stops

05:00 - 09:40

ONT

LHR

20h 40m

1 stop

€520United Airlines

Sat, 22 Aug - Sat, 12 Sep

14:50 - 20:36

LHR

ONT

13h 46m

1 stop

13:27 - 11:10

ONT

LHR

13h 43m

1 stop

€524United Airlines

Tue, 31 Mar - Wed, 15 Apr

14:50 - 20:36

LHR

ONT

13h 46m

1 stop

13:18 - 12:20

ONT

LHR

15h 02m

1 stop

€526United Airlines

Mon, 27 Apr - Wed, 27 May

British Airways flights from London Heathrow Airport to Ontario

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

British Airways

19 Mar

LHR08:20London Heathrow

17h 32m

1 stop

ONT18:52Ontario

29 Apr

ONT10:59Ontario

12h 56m

1 stop

LHR07:55London Heathrow

€517

British Airways

24 Apr

LHR08:55London Heathrow

21h 41m

1 stop

ONT22:36Ontario

1 May

ONT12:19Ontario

14h 31m

1 stop

LHR10:50London Heathrow

€532

British Airways

27 Apr

LHR09:15London Heathrow

22h 31m

2 stops

ONT23:46Ontario

9 May

ONT23:59Ontario

30h 26m

1 stop

LHR14:25London Heathrow

€534

United Airlines flights from London Heathrow Airport to Ontario

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

United Airlines

16 Mar

LHR11:35London Heathrow

16h 15m

1 stop

ONT20:50Ontario

30 Mar

ONT13:34Ontario

14h 51m

1 stop

LHR12:25London Heathrow

€497

United Airlines

16 Mar

LHR11:35London Heathrow

16h 15m

1 stop

ONT20:50Ontario

30 Mar

ONT13:34Ontario

14h 51m

1 stop

LHR12:25London Heathrow

€498

United Airlines

22 Aug

LHR07:30London Heathrow

18h 41m

2 stops

ONT18:11Ontario

12 Sept

ONT05:00Ontario

20h 40m

1 stop

LHR09:40London Heathrow

€499

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

Sat 22/8

07:30-18:11

2 stops18h 41m

Ontario

Sat 12/9

05:00-09:40

1 stop20h 40m

€499

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 24/4

10:50-22:45

2 stops19h 55m

Ontario

Fri 1/5

13:40-12:20

1 stop14h 40m

€506

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 27/4

07:30-21:50

2 stops22h 20m

Ontario

Sat 9/5

06:00-14:10

1 stop24h 10m

€508

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 26/4

07:25-17:47

2 stops18h 22m

Ontario

Sun 3/5

10:37-11:10

1 stop16h 33m

€508

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 27/4

09:30-21:50

2 stops20h 20m

Ontario

Sat 9/5

06:00-07:15

2 stops17h 15m

€510

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 1/5

10:25-20:36

2 stops18h 11m

Ontario

Tue 5/5

07:00-07:15

2 stops16h 15m

€511

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 27/4

11:25-20:36

1 stop17h 11m

Ontario

Sat 9/5

13:30-14:10

1 stop16h 40m

€513

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 22/8

07:30-18:11

2 stops18h 41m

Ontario

Sat 12/9

05:00-09:40

1 stop20h 40m

€520

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 31/3

14:50-20:36

1 stop13h 46m

Ontario

Wed 15/4

13:27-11:10

1 stop13h 43m

€524

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 27/4

14:50-20:36

1 stop13h 46m

Ontario

Wed 27/5

13:18-12:20

1 stop15h 02m

€526

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.

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 €591 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 €433 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 17m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 14h 17m

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

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 17m, 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.