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

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.

€430 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 €844 to €516. The lowest price recently found on this route was €557.

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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.

18:15 - 19:56

LHR

ONT

33h 41m

2 stops

23:59 - 09:00

ONT

LHR

25h 01m

1 stop

€557British Airways

Mon, 8 Jun - Sun, 14 Jun

08:55 - 21:08

LHR

ONT

20h 13m

1 stop

10:25 - 10:55

ONT

LHR

16h 30m

1 stop

€564British Airways

Tue, 13 Oct - Thu, 22 Oct

08:55 - 19:56

LHR

ONT

19h 01m

1 stop

14:18 - 12:50

ONT

LHR

14h 32m

1 stop

€567British Airways

Tue, 9 Jun - Mon, 15 Jun

19:30 - 19:56

LHR

ONT

32h 26m

2 stops

13:10 - 11:05

ONT

LHR

13h 55m

1 stop

€568British Airways

Mon, 15 Jun - Tue, 21 Jul

14:25 - 09:29

LHR

ONT

27h 04m

1 stop

23:59 - 06:50

ONT

LHR

23h 51m

1 stop

€569British Airways

Mon, 12 Oct - Sun, 25 Oct

06:30 - 16:12

LHR

ONT

17h 42m

2 stops

13:00 - 10:00

ONT

LHR

13h 00m

1 stop

€570Delta

Mon, 12 Oct - Wed, 21 Oct

11:45 - 23:34

LHR

ONT

19h 49m

2 stops

18:01 - 15:35

ONT

LHR

13h 34m

1 stop

€571Virgin Atlantic

Wed, 5 Aug - Thu, 13 Aug

11:00 - 18:57

LHR

ONT

15h 57m

1 stop

10:56 - 08:15

ONT

LHR

14h 19m

1 stop

€577British Airways

Tue, 29 Sep - Thu, 25 Mar

10:55 - 08:50

LHR

ONT

29h 55m

1 stop

22:00 - 11:20

ONT

LHR

29h 20m

2 stops

€581Delta

Thu, 18 Jun - Tue, 21 Jul

20:05 - 21:48

LHR

ONT

33h 43m

2 stops

22:00 - 06:20

ONT

LHR

24h 20m

2 stops

€583Delta

Sun, 14 Jun - Wed, 22 Jul

British Airways flights from London Heathrow Airport to Ontario

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

British Airways

8 Jun

LHR18:15London Heathrow

33h 41m

2 stops

ONT19:56Ontario

14 Jun

ONT23:59Ontario

25h 01m

1 stop

LHR09:00London Heathrow

€557

British Airways

13 Oct

LHR08:55London Heathrow

20h 13m

1 stop

ONT21:08Ontario

22 Oct

ONT10:25Ontario

16h 30m

1 stop

LHR10:55London Heathrow

€564

British Airways

9 Jun

LHR08:55London Heathrow

19h 01m

1 stop

ONT19:56Ontario

15 Jun

ONT14:18Ontario

14h 32m

1 stop

LHR12:50London Heathrow

€567

Delta flights from London Heathrow Airport to Ontario

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

Delta

12 Oct

LHR06:30London Heathrow

17h 42m

2 stops

ONT16:12Ontario

21 Oct

ONT13:00Ontario

13h 00m

1 stop

LHR10:00London Heathrow

€570

Delta

18 Jun

LHR10:55London Heathrow

29h 55m

1 stop

ONT08:50Ontario

21 Jul

ONT22:00Ontario

29h 20m

2 stops

LHR11:20London Heathrow

€581

Delta

14 Jun

LHR20:05London Heathrow

33h 43m

2 stops

ONT21:48Ontario

22 Jul

ONT22:00Ontario

24h 20m

2 stops

LHR06:20London Heathrow

€583

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

Mon 8/6

18:15-19:56

2 stops33h 41m

Ontario

Sun 14/6

23:59-09:00

1 stop25h 01m

€557

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 13/10

08:55-21:08

1 stop20h 13m

Ontario

Thu 22/10

10:25-10:55

1 stop16h 30m

€564

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 9/6

08:55-19:56

1 stop19h 01m

Ontario

Mon 15/6

14:18-12:50

1 stop14h 32m

€567

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 15/6

19:30-19:56

2 stops32h 26m

Ontario

Tue 21/7

13:10-11:05

1 stop13h 55m

€568

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 12/10

14:25-09:29

1 stop27h 04m

Ontario

Sun 25/10

23:59-06:50

1 stop23h 51m

€569

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 12/10

06:30-16:12

2 stops17h 42m

Ontario

Wed 21/10

13:00-10:00

1 stop13h 00m

€570

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 5/8

11:45-23:34

2 stops19h 49m

Ontario

Thu 13/8

18:01-15:35

1 stop13h 34m

€571

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 29/9

11:00-18:57

1 stop15h 57m

Ontario

Thu 25/3

10:56-08:15

1 stop14h 19m

€577

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 18/6

10:55-08:50

1 stop29h 55m

Ontario

Tue 21/7

22:00-11:20

2 stops29h 20m

€581

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 14/6

20:05-21:48

2 stops33h 43m

Ontario

Wed 22/7

22:00-06:20

2 stops24h 20m

€583

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 €476.

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 €559 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 €427 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	21h 21m
Direct flights	None

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