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

British Airways, JetBlue, and Avianca 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.

€408 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 high for flights on this route. Typical prices usually range from €597 to €534. The lowest price recently found on this route was €600.

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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 - 17:10

LHR

ONT

18h 40m

2 stops

17:50 - 15:35

ONT

LHR

13h 45m

1 stop

€600Delta

Thu, 21 May - Wed, 3 Jun

06:15 - 17:21

LHR

ONT

19h 06m

2 stops

11:59 - 15:35

ONT

LHR

19h 36m

1 stop

€605Delta

Tue, 14 Jul - Thu, 30 Jul

11:40 - 22:34

LHR

ONT

18h 54m

1 stop

13:35 - 15:35

ONT

LHR

18h 00m

1 stop

€616Virgin Atlantic

Thu, 21 May - Wed, 3 Jun

06:30 - 16:17

LHR

ONT

17h 47m

2 stops

13:29 - 13:05

ONT

LHR

15h 36m

2 stops

€625Virgin Atlantic

Sat, 9 May - Sat, 16 May

12:55 - 20:54

LHR

ONT

15h 59m

1 stop

12:19 - 10:50

ONT

LHR

14h 31m

1 stop

€626British Airways

Tue, 21 Apr - Thu, 30 Apr

12:25 - 23:44

LHR

ONT

19h 19m

2 stops

18:01 - 15:35

ONT

LHR

13h 34m

1 stop

€628Virgin Atlantic

Thu, 30 Jul - Thu, 6 Aug

06:30 - 22:34

LHR

ONT

24h 04m

2 stops

13:35 - 15:35

ONT

LHR

18h 00m

1 stop

€630Delta

Sat, 23 May - Sat, 30 May

11:00 - 16:24

LHR

ONT

13h 24m

1 stop

10:25 - 09:00

ONT

LHR

14h 35m

1 stop

€632British Airways

Wed, 5 Aug - Thu, 20 Aug

11:00 - 16:24

LHR

ONT

13h 24m

1 stop

16:54 - 15:05

ONT

LHR

14h 11m

1 stop

€634British Airways

Wed, 5 Aug - Mon, 17 Aug

11:00 - 18:17

LHR

ONT

15h 17m

1 stop

07:20 - 12:10

ONT

LHR

20h 50m

1 stop

€636British Airways

Mon, 10 Aug - Mon, 31 Aug

British Airways flights from London Heathrow Airport to Ontario

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

British Airways

21 Apr

LHR12:55London Heathrow

15h 59m

1 stop

ONT20:54Ontario

30 Apr

ONT12:19Ontario

14h 31m

1 stop

LHR10:50London Heathrow

€626

British Airways

15 Apr

LHR14:25London Heathrow

17h 21m

1 stop

ONT23:46Ontario

19 Apr

ONT23:59Ontario

22h 21m

1 stop

LHR06:20London Heathrow

€629

British Airways

5 Aug

LHR11:00London Heathrow

13h 24m

1 stop

ONT16:24Ontario

20 Aug

ONT10:25Ontario

14h 35m

1 stop

LHR09:00London Heathrow

€632

United Airlines flights from London Heathrow Airport to Ontario

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

United Airlines

11 May

LHR07:25London Heathrow

18h 27m

2 stops

ONT17:52Ontario

18 May

ONT18:59Ontario

18h 26m

2 stops

LHR21:25London Heathrow

€661

United Airlines

27 Apr

LHR10:50London Heathrow

19h 55m

2 stops

ONT22:45Ontario

10 May

ONT18:59Ontario

32h 11m

1 stop

LHR11:10London Heathrow

€674

United Airlines

27 Apr

LHR07:25London Heathrow

18h 22m

2 stops

ONT17:47Ontario

29 Apr

ONT11:05Ontario

19h 05m

1 stop

LHR14:10London Heathrow

€675

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

Thu 21/5

06:30-17:10

2 stops18h 40m

Ontario

Wed 3/6

17:50-15:35

1 stop13h 45m

€600

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 14/7

06:15-17:21

2 stops19h 06m

Ontario

Thu 30/7

11:59-15:35

1 stop19h 36m

€605

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 21/5

11:40-22:34

1 stop18h 54m

Ontario

Wed 3/6

13:35-15:35

1 stop18h 00m

€616

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 9/5

06:30-16:17

2 stops17h 47m

Ontario

Sat 16/5

13:29-13:05

2 stops15h 36m

€625

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 21/4

12:55-20:54

1 stop15h 59m

Ontario

Thu 30/4

12:19-10:50

1 stop14h 31m

€626

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 30/7

12:25-23:44

2 stops19h 19m

Ontario

Thu 6/8

18:01-15:35

1 stop13h 34m

€628

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 23/5

06:30-22:34

2 stops24h 04m

Ontario

Sat 30/5

13:35-15:35

1 stop18h 00m

€630

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 5/8

11:00-16:24

1 stop13h 24m

Ontario

Thu 20/8

10:25-09:00

1 stop14h 35m

€632

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 5/8

11:00-16:24

1 stop13h 24m

Ontario

Mon 17/8

16:54-15:05

1 stop14h 11m

€634

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 10/8

11:00-18:17

1 stop15h 17m

Ontario

Mon 31/8

07:20-12:10

1 stop20h 50m

€636

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 €472.

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 €575 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	15h 21m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 15h 21m

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 15h 21m, 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.