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

Flights via Seattle (SEA) offer the lowest average return price of £509.

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: 2h 01m.

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 20 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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 11m.

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

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

Phoenix (PHX) was the most common stop: 43% of momondo users choosing one-stop flights on this route connected there.

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 3 as of May 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.

£371 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 £880 to £589. The lowest price recently found on this route was £466.

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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.

15:00 - 22:23

LHR

ONT

15h 23m

1 stop

15:09 - 12:00

ONT

LHR

12h 51m

1 stop

£466British Airways

Wed, 4 Nov - Thu, 28 Jan

10:45 - 16:12

LHR

ONT

13h 27m

1 stop

13:00 - 10:00

ONT

LHR

13h 00m

1 stop

£469Virgin Atlantic

Thu, 5 Nov - Sat, 14 Nov

10:55 - 23:44

LHR

ONT

20h 49m

1 stop

07:00 - 13:15

ONT

LHR

22h 15m

1 stop

£470Virgin Atlantic

Sat, 3 Oct - Fri, 16 Oct

10:55 - 16:41

LHR

ONT

13h 46m

1 stop

07:05 - 06:25

ONT

LHR

15h 20m

1 stop

£472Virgin Atlantic

Tue, 9 Jun - Thu, 23 Jul

11:40 - 22:32

LHR

ONT

18h 52m

1 stop

07:05 - 06:25

ONT

LHR

15h 20m

1 stop

£475Virgin Atlantic

Mon, 1 Jun - Mon, 8 Jun

17:45 - 22:32

LHR

ONT

36h 47m

1 stop

07:05 - 06:25

ONT

LHR

15h 20m

1 stop

£475Virgin Atlantic

Mon, 1 Jun - Mon, 8 Jun

08:15 - 23:59

LHR

ONT

23h 44m

2 stops

10:22 - 12:50

ONT

LHR

18h 28m

1 stop

£480Multiple Airlines

Tue, 2 Jun - Wed, 10 Jun

15:15 - 18:29

LHR

ONT

35h 14m

1 stop

22:00 - 06:25

ONT

LHR

24h 25m

1 stop

£481Multiple Airlines

Wed, 5 Aug - Fri, 14 Aug

08:40 - 23:34

LHR

ONT

22h 54m

2 stops

13:29 - 13:05

ONT

LHR

39h 36m

2 stops

£482Virgin Atlantic

Tue, 26 May - Tue, 2 Jun

07:30 - 22:59

LHR

ONT

23h 29m

2 stops

06:05 - 07:25

ONT

LHR

17h 20m

1 stop

£484United Airlines

Mon, 5 Oct - Thu, 15 Oct

British Airways flights from London Heathrow Airport to Ontario

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

British Airways

4 Nov

LHR15:00London Heathrow

15h 23m

1 stop

ONT22:23Ontario

28 Jan

ONT15:09Ontario

12h 51m

1 stop

LHR12:00London Heathrow

£466

British Airways

10 Sept

LHR14:25London Heathrow

14h 43m

1 stop

ONT21:08Ontario

4 Nov

ONT16:47Ontario

12h 28m

1 stop

LHR13:15London Heathrow

£486

British Airways

1 Jun

LHR19:30London Heathrow

36h 29m

2 stops

ONT23:59Ontario

10 Jun

ONT12:40Ontario

14h 15m

1 stop

LHR10:55London Heathrow

£487

Delta flights from London Heathrow Airport to Ontario

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

Delta

1 Jun

LHR06:30London Heathrow

18h 38m

2 stops

ONT17:08Ontario

8 Jun

ONT22:00Ontario

24h 25m

1 stop

LHR06:25London Heathrow

£490

Delta

2 Jun

LHR09:55London Heathrow

20h 37m

2 stops

ONT22:32Ontario

7 Jun

ONT17:59Ontario

13h 36m

1 stop

LHR15:35London Heathrow

£491

Delta

5 Aug

LHR11:45London Heathrow

19h 49m

2 stops

ONT23:34Ontario

13 Aug

ONT09:43Ontario

19h 32m

2 stops

LHR13:15London Heathrow

£494

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 4/11

15:00-22:23

1 stop15h 23m

Ontario

Thu 28/1

15:09-12:00

1 stop12h 51m

£466

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 5/11

10:45-16:12

1 stop13h 27m

Ontario

Sat 14/11

13:00-10:00

1 stop13h 00m

£469

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 3/10

10:55-23:44

1 stop20h 49m

Ontario

Fri 16/10

07:00-13:15

1 stop22h 15m

£470

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 9/6

10:55-16:41

1 stop13h 46m

Ontario

Thu 23/7

07:05-06:25

1 stop15h 20m

£472

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 1/6

11:40-22:32

1 stop18h 52m

Ontario

Mon 8/6

07:05-06:25

1 stop15h 20m

£475

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 1/6

17:45-22:32

1 stop36h 47m

Ontario

Mon 8/6

07:05-06:25

1 stop15h 20m

£475

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 2/6

08:15-23:59

2 stops23h 44m

Ontario

Wed 10/6

10:22-12:50

1 stop18h 28m

£480

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 5/8

15:15-18:29

1 stop35h 14m

Ontario

Fri 14/8

22:00-06:25

1 stop24h 25m

£481

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 26/5

08:40-23:34

2 stops22h 54m

Ontario

Tue 2/6

13:29-13:05

2 stops39h 36m

£482

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 5/10

07:30-22:59

2 stops23h 29m

Ontario

Thu 15/10

06:05-07:25

1 stop17h 20m

£484

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 typical price of a round-trip flight between London Heathrow Airport and Ontario?

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 £386. 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 £406.

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 £500 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 £364 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 27m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 13h 27m

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?
Ontario is 5408.1 mi away from London Heathrow. By plane, this route typically takes 13h 27m.
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 3 as of May 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 64% of all bookings. The subsequent popular airlines are Virgin Atlantic at 27% and United Airlines at 9%.

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 £364	Free Cancellation	Rating 7.4 9,694 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £368	Free Cancellation	Rating 7.4 688 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £374	Free Cancellation	Rating 6.7 7,964 reviews	Search British Airways 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.