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

United Airlines, Lufthansa, and British Airways are the most popular carriers operating from London Heathrow to Ontario

Which stopover airport has the shortest connection time from London Heathrow Airport to Ontario?

Phoenix (PHX) has the shortest average stopover time for this route: 1h 28m.

Which airport is the most popular for stopovers for flights between London Heathrow Airport and Ontario?

Seattle (SEA) was the most common stop: 33% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport has the shortest travel time from London Heathrow Airport to Ontario?

Flights connecting via Phoenix (PHX) have the shortest average one-way travel time: 14h 00m.

Which stopover airport offers the lowest fares from London Heathrow Airport to Ontario?

Flights via Phoenix (PHX) offer the lowest average return price of £441.

Which airlines fly to Ontario?

Virgin Atlantic, British Airways and Lufthansa are the top three most popular airlines that fly to Ontario from London Heathrow Airport according to our data. Virgin Atlantic is the first choice among our users, with 47% of people opting to fly with this airline when travelling to Ontario. Keep in mind that there are 19 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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 were last updated today.

How many operators does momondo search for flights from London Heathrow Airport to Ontario Airport?

The number of operators available for flights from London Heathrow Airport to Ontario Airport is 5 as of March 2026.

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 travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

£344 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.

07:25 - 17:47

LHR

ONT

18h 22m

2 stops

18:49 - 11:10

ONT

LHR

32h 21m

1 stop

£451United Airlines

Wed, 15 Apr - Wed, 22 Apr

10:50 - 22:59

LHR

ONT

20h 09m

2 stops

06:00 - 14:10

ONT

LHR

24h 10m

1 stop

£452United Airlines

Fri, 8 May - Tue, 12 May

06:55 - 17:47

LHR

ONT

18h 52m

2 stops

11:05 - 11:10

ONT

LHR

16h 05m

1 stop

£453United Airlines

Wed, 15 Apr - Wed, 29 Apr

10:50 - 22:45

LHR

ONT

19h 55m

2 stops

13:40 - 21:35

ONT

LHR

23h 55m

2 stops

£455United Airlines

Fri, 24 Apr - Fri, 8 May

09:30 - 21:50

LHR

ONT

20h 20m

2 stops

07:00 - 07:15

ONT

LHR

16h 15m

2 stops

£456United Airlines

Sun, 19 Apr - Sat, 2 May

10:05 - 16:22

LHR

ONT

14h 17m

1 stop

10:59 - 08:05

ONT

LHR

13h 06m

1 stop

£464British Airways

Tue, 14 Apr - Tue, 21 Apr

10:50 - 22:45

LHR

ONT

19h 55m

2 stops

05:00 - 07:15

ONT

LHR

18h 15m

2 stops

£464United Airlines

Wed, 15 Apr - Sat, 9 May

10:05 - 16:22

LHR

ONT

14h 17m

1 stop

10:59 - 08:05

ONT

LHR

13h 06m

1 stop

£465British Airways

Tue, 14 Apr - Fri, 24 Apr

09:30 - 21:50

LHR

ONT

20h 20m

2 stops

05:00 - 08:20

ONT

LHR

19h 20m

2 stops

£466United Airlines

Fri, 17 Apr - Sat, 9 May

15:30 - 21:50

LHR

ONT

38h 20m

2 stops

13:30 - 11:10

ONT

LHR

13h 40m

1 stop

£467United Airlines

Mon, 27 Apr - Sat, 9 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

14 Apr

LHR10:05London Heathrow

14h 17m

1 stop

ONT16:22Ontario

21 Apr

ONT10:59Ontario

13h 06m

1 stop

LHR08:05London Heathrow

£464

British Airways

14 Apr

LHR10:05London Heathrow

14h 17m

1 stop

ONT16:22Ontario

24 Apr

ONT10:59Ontario

13h 06m

1 stop

LHR08:05London Heathrow

£465

British Airways

6 Apr

LHR10:05London Heathrow

14h 17m

1 stop

ONT16:22Ontario

23 Apr

ONT10:59Ontario

13h 06m

1 stop

LHR08:05London Heathrow

£471

United Airlines flights from London Heathrow Airport to Ontario

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

United Airlines

15 Apr

LHR07:25London Heathrow

18h 22m

2 stops

ONT17:47Ontario

22 Apr

ONT18:49Ontario

32h 21m

1 stop

LHR11:10London Heathrow

£451

United Airlines

8 May

LHR10:50London Heathrow

20h 09m

2 stops

ONT22:59Ontario

12 May

ONT06:00Ontario

24h 10m

1 stop

LHR14:10London Heathrow

£452

United Airlines

15 Apr

LHR06:55London Heathrow

18h 52m

2 stops

ONT17:47Ontario

29 Apr

ONT11:05Ontario

16h 05m

1 stop

LHR11:10London Heathrow

£453

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 15/4

07:25-17:47

2 stops18h 22m

Ontario

Wed 22/4

18:49-11:10

1 stop32h 21m

£451

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 8/5

10:50-22:59

2 stops20h 09m

Ontario

Tue 12/5

06:00-14:10

1 stop24h 10m

£452

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 15/4

06:55-17:47

2 stops18h 52m

Ontario

Wed 29/4

11:05-11:10

1 stop16h 05m

£453

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 24/4

10:50-22:45

2 stops19h 55m

Ontario

Fri 8/5

13:40-21:35

2 stops23h 55m

£455

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 19/4

09:30-21:50

2 stops20h 20m

Ontario

Sat 2/5

07:00-07:15

2 stops16h 15m

£456

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 14/4

10:05-16:22

1 stop14h 17m

Ontario

Tue 21/4

10:59-08:05

1 stop13h 06m

£464

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 15/4

10:50-22:45

2 stops19h 55m

Ontario

Sat 9/5

05:00-07:15

2 stops18h 15m

£464

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 14/4

10:05-16:22

1 stop14h 17m

Ontario

Fri 24/4

10:59-08:05

1 stop13h 06m

£465

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 17/4

09:30-21:50

2 stops20h 20m

Ontario

Sat 9/5

05:00-08:20

2 stops19h 20m

£466

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 27/4

15:30-21:50

2 stops38h 20m

Ontario

Sat 9/5

13:30-11:10

1 stop13h 40m

£467

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

Stopovers

What is the cheapest month to fly to Ontario?

The month of February is, on average, the cheapest month to fly to Ontario from London Heathrow Airport, with most prices found around £395. If you’re not able to fly to Ontario in February, then January is your next best option. Flight prices from London Heathrow Airport to Ontario during January average around £415.

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 £509 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 £372 on momondo.

Can stopping save me money on London Heathrow Airport to Ontario flights?

You could potentially save up to 26% on your flight if you consider stops on a London Heathrow Airport to Ontario flight.

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	13h 46m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 13h 46m

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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How far is London Heathrow to Ontario by plane?
Ontario is 5408.1 mi away from London Heathrow. By plane, this route typically takes 13h 46m.
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 were last updated today.
How many operators does momondo search for flights from London Heathrow Airport to Ontario Airport?
The number of operators available for flights from London Heathrow Airport to Ontario Airport is 5 as of March 2026.
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 travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from London Heathrow Airport to Ontario?
momondo data reveals that the most frequently booked airline on the route from London Heathrow Airport to Ontario is British Airways, representing 52% of all bookings. The subsequent popular airlines are Virgin Atlantic at 30%, United Airlines at 7%, and Lufthansa at 5%.

Best airlines flying from London Heathrow Airport to Ontario

Compare and see reviews for airlines that fly from London Heathrow Airport to Ontario with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom £372	Free Cancellation	Rating 7.4 9,435 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £377	Free Cancellation	Rating 7.5 682 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £382	Free Cancellation	Rating 6.7 7,802 reviews	Search British Airways flights
KLM	PriceFrom £470	Free Cancellation	Rating 7.8 1,471 reviews	Search KLM flights
Lufthansa	PriceFrom £483	Free Cancellation	Rating 6.8 7,858 reviews	Search Lufthansa flights

Why use momondo?

Why should I use momondo to find a flight deal from London to Ontario?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from London.

Can I find flights from London to Ontario with flexible booking policies on momondo?

Flights from London to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from London to Ontario?

Once you have performed a search for London to Ontario flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from London to Ontario right now. Can momondo alert me if prices change?

Price alerts on flights to Ontario from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.