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

United Airlines is the most popular carrier 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.

€368 Cheap Flights from London Heathrow Airport to Ontario in 2026

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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.

08:30 - 22:18

LHR

ONT

20h 48m

2 stops

13:40 - 07:25

ONT

LHR

34h 45m

1 stop

€394United Airlines

Fri, 13 Mar - Fri, 20 Mar

08:30 - 22:18

LHR

ONT

20h 48m

2 stops

23:59 - 06:40

ONT

LHR

23h 41m

2 stops

€410United Airlines

Fri, 13 Mar - Fri, 20 Mar

10:05 - 17:41

LHR

ONT

15h 36m

1 stop

13:40 - 12:00

ONT

LHR

14h 20m

1 stop

€421United Airlines

Thu, 26 Feb - Thu, 5 Mar

11:35 - 20:57

LHR

ONT

16h 22m

1 stop

13:34 - 12:20

ONT

LHR

14h 46m

1 stop

€422United Airlines

Sun, 15 Mar - Mon, 30 Mar

06:30 - 22:34

LHR

ONT

23h 04m

2 stops

11:59 - 15:35

ONT

LHR

19h 36m

1 stop

€425Delta

Thu, 19 Mar - Wed, 1 Apr

09:30 - 20:50

LHR

ONT

19h 20m

2 stops

05:15 - 08:25

ONT

LHR

19h 10m

2 stops

€426United Airlines

Thu, 26 Feb - Thu, 5 Mar

13:45 - 22:57

LHR

ONT

16h 12m

1 stop

13:40 - 12:00

ONT

LHR

15h 20m

1 stop

€428United Airlines

Fri, 20 Mar - Tue, 24 Mar

13:40 - 21:50

LHR

ONT

16h 10m

1 stop

13:30 - 11:10

ONT

LHR

13h 40m

1 stop

€434United Airlines

Mon, 27 Apr - Fri, 1 May

14:30 - 22:37

LHR

ONT

16h 07m

1 stop

12:50 - 09:00

ONT

LHR

13h 10m

1 stop

€435Multiple Airlines

Tue, 24 Feb - Tue, 17 Mar

10:05 - 17:43

LHR

ONT

15h 38m

1 stop

13:50 - 12:00

ONT

LHR

14h 10m

1 stop

€436United Airlines

Wed, 11 Feb - Thu, 19 Feb

Delta flights from London Heathrow Airport to Ontario

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

Delta

19 Mar

LHR06:30London Heathrow

23h 04m

2 stops

ONT22:34Ontario

1 Apr

ONT11:59Ontario

19h 36m

1 stop

LHR15:35London Heathrow

€425

Delta

4 Feb

LHR12:20London Heathrow

18h 24m

1 stop

ONT22:44Ontario

15 Mar

ONT17:53Ontario

35h 02m

1 stop

LHR11:55London Heathrow

€435

Delta

9 Feb

LHR15:50London Heathrow

27h 41m

1 stop

ONT11:31Ontario

4 Mar

ONT13:10Ontario

12h 50m

1 stop

LHR10:00London Heathrow

€438

United Airlines flights from London Heathrow Airport to Ontario

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

United Airlines

13 Mar

LHR08:30London Heathrow

20h 48m

2 stops

ONT22:18Ontario

20 Mar

ONT13:40Ontario

34h 45m

1 stop

LHR07:25London Heathrow

€394

United Airlines

13 Mar

LHR08:30London Heathrow

20h 48m

2 stops

ONT22:18Ontario

20 Mar

ONT23:59Ontario

23h 41m

2 stops

LHR06:40London Heathrow

€410

United Airlines

26 Feb

LHR10:05London Heathrow

15h 36m

1 stop

ONT17:41Ontario

5 Mar

ONT13:40Ontario

14h 20m

1 stop

LHR12:00London Heathrow

€421

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

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 13/3

08:30-22:18

2 stops20h 48m

Ontario

Fri 20/3

13:40-07:25

1 stop34h 45m

€394

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 13/3

08:30-22:18

2 stops20h 48m

Ontario

Fri 20/3

23:59-06:40

2 stops23h 41m

€410

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/2

10:05-17:41

1 stop15h 36m

Ontario

Thu 5/3

13:40-12:00

1 stop14h 20m

€421

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 15/3

11:35-20:57

1 stop16h 22m

Ontario

Mon 30/3

13:34-12:20

1 stop14h 46m

€422

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 19/3

06:30-22:34

2 stops23h 04m

Ontario

Wed 1/4

11:59-15:35

1 stop19h 36m

€425

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/2

09:30-20:50

2 stops19h 20m

Ontario

Thu 5/3

05:15-08:25

2 stops19h 10m

€426

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 20/3

13:45-22:57

1 stop16h 12m

Ontario

Tue 24/3

13:40-12:00

1 stop15h 20m

€428

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 27/4

13:40-21:50

1 stop16h 10m

Ontario

Fri 1/5

13:30-11:10

1 stop13h 40m

€434

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 24/2

14:30-22:37

1 stop16h 07m

Ontario

Tue 17/3

12:50-09:00

1 stop13h 10m

€435

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/2

10:05-17:43

1 stop15h 38m

Ontario

Thu 19/2

13:50-12:00

1 stop14h 10m

€436

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 cheapest month to fly to Ontario?

If you don’t want to visit Ontario in January, then you should wait until September to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of €478.

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 €569 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 €440 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 25m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 14h 25m

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 25m, 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.