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

Flights connecting via Phoenix (PHX) have the shortest average one-way travel time: 14h 04m.

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

Phoenix (PHX) was the most common stop: 38% of momondo users choosing one-stop flights on this route connected there.

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

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

Which stopover airport has the shortest connection time from London 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 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 offers the lowest fares from London to Ontario?

Flights via Phoenix (PHX) offer the lowest average return price of £401.

When did momondo last update prices for flights from London to Ontario Airport?

Prices for flights from London to Ontario Airport are refreshed on a daily basis.

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

As of May 2026, there are 3 operators available to choose from for flights from London to Ontario Airport.

How old do you have to be to fly from London to Ontario Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London 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.

£370 Cheap Flights from London to Ontario in 2026

Q: What is the typical price of a round-trip flight between London and Ontario?

Prices are currently low for flights on this route. Typical prices usually range from £669 to £599. The lowest price recently found on this route was £456.

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One-way

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Enter your travel dates to find the best prices.

12:55 - 22:58

LHR

ONT

18h 03m

1 stop

10:29 - 09:00

ONT

LHR

14h 31m

1 stop

£456British Airways

Wed, 19 Aug - Wed, 26 Aug

10:55 - 16:30

LHR

ONT

13h 35m

1 stop

13:00 - 11:00

ONT

LHR

14h 00m

1 stop

£457Virgin Atlantic

Tue, 7 Jul - Tue, 21 Jul

10:55 - 16:14

LHR

ONT

13h 19m

1 stop

13:00 - 10:00

ONT

LHR

13h 00m

1 stop

£472Multiple Airlines

Thu, 20 Aug - Sat, 12 Sep

10:55 - 16:17

LHR

ONT

13h 22m

1 stop

13:29 - 10:00

ONT

LHR

12h 31m

1 stop

£476Virgin Atlantic

Wed, 27 May - Mon, 1 Jun

12:20 - 23:59

LGW

ONT

19h 39m

2 stops

23:59 - 06:35

ONT

LGW

22h 36m

2 stops

£482American Airlines

Mon, 15 Jun - Mon, 22 Jun

11:00 - 18:57

LHR

ONT

15h 57m

1 stop

10:25 - 06:50

ONT

LHR

13h 25m

1 stop

£484Iberia

Wed, 7 Oct - Mon, 26 Oct

14:25 - 21:12

LHR

ONT

14h 47m

1 stop

14:22 - 12:50

ONT

LHR

14h 28m

1 stop

£485Iberia

Tue, 1 Sep - Wed, 30 Sep

08:55 - 18:57

LHR

ONT

18h 02m

1 stop

23:59 - 06:20

ONT

LHR

22h 21m

1 stop

£487British Airways

Wed, 23 Sep - Sun, 27 Sep

08:40 - 22:32

LHR

ONT

21h 52m

2 stops

17:59 - 15:35

ONT

LHR

13h 36m

1 stop

£487Delta

Mon, 1 Jun - Mon, 8 Jun

09:20 - 22:41

LCY

ONT

21h 21m

2 stops

13:00 - 16:40

ONT

LCY

19h 40m

2 stops

£713Delta

Tue, 16 Jun - Tue, 23 Jun

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British Airways flights from London to Ontario

Our best British Airways deals on London to Ontario flight tickets

British Airways

19 Aug

LHR12:55London Heathrow

18h 03m

1 stop

ONT22:58Ontario

26 Aug

ONT10:29Ontario

14h 31m

1 stop

LHR09:00London Heathrow

£456

British Airways

12 May

LHR10:05London Heathrow

14h 17m

1 stop

ONT16:22Ontario

29 Sept

ONT13:31Ontario

12h 59m

1 stop

LHR10:30London Heathrow

£485

British Airways

23 Sept

LHR08:55London Heathrow

18h 02m

1 stop

ONT18:57Ontario

27 Sept

ONT23:59Ontario

22h 21m

1 stop

LHR06:20London Heathrow

£487

Virgin Atlantic flights from London to Ontario

Our best Virgin Atlantic deals on London to Ontario flight tickets

Virgin Atlantic

7 Jul

LHR10:55London Heathrow

13h 35m

1 stop

ONT16:30Ontario

21 Jul

ONT13:00Ontario

14h 00m

1 stop

LHR11:00London Heathrow

£457

Virgin Atlantic

27 May

LHR10:55London Heathrow

13h 22m

1 stop

ONT16:17Ontario

1 Jun

ONT13:29Ontario

12h 31m

1 stop

LHR10:00London Heathrow

£476

Virgin Atlantic

16 Jun

LHR10:55London Heathrow

20h 54m

1 stop

ONT23:49Ontario

23 Jun

ONT13:00Ontario

14h 00m

1 stop

LHR11:00London Heathrow

£479

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 19/8

12:55-22:58

1 stop18h 03m

Ontario

Wed 26/8

10:29-09:00

1 stop14h 31m

£456

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 7/7

10:55-16:30

1 stop13h 35m

Ontario

Tue 21/7

13:00-11:00

1 stop14h 00m

£457

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 20/8

10:55-16:14

1 stop13h 19m

Ontario

Sat 12/9

13:00-10:00

1 stop13h 00m

£472

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 27/5

10:55-16:17

1 stop13h 22m

Ontario

Mon 1/6

13:29-10:00

1 stop12h 31m

£476

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Mon 15/6

12:20-23:59

2 stops19h 39m

Ontario

Mon 22/6

23:59-06:35

2 stops22h 36m

£482

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 7/10

11:00-18:57

1 stop15h 57m

Ontario

Mon 26/10

10:25-06:50

1 stop13h 25m

£484

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 1/9

14:25-21:12

1 stop14h 47m

Ontario

Wed 30/9

14:22-12:50

1 stop14h 28m

£485

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 23/9

08:55-18:57

1 stop18h 02m

Ontario

Sun 27/9

23:59-06:20

1 stop22h 21m

£487

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 1/6

08:40-22:32

2 stops21h 52m

Ontario

Mon 8/6

17:59-15:35

1 stop13h 36m

£487

LondonOntario

LCY - ONT

LCYONT

London City

Tue 16/6

09:20-22:41

2 stops21h 21m

Ontario

Tue 23/6

13:00-16:40

2 stops19h 40m

£713

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 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 and Ontario?

What is the cheapest month to fly to Ontario?

The month of December is, on average, the cheapest month to fly to Ontario from London, with most prices found around £276. If you’re not able to fly to Ontario in December, then March is your next best option. Flight prices from London to Ontario during March average around £293.

How far in advance should I book a flight from London to Ontario?

You are more likely to see cheaper flights to Ontario from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around £497 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 for as low as £365 on momondo.

Can stopping save me money on London to Ontario flights?

You could potentially save up to 20% on your flight if you consider stops on a London to Ontario flight.

When to book flights from London to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from London to Ontario according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap London to Ontario (LON to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Ontario

Fastest flight time	13h 22m
Direct flights	None

The fastest flight from London to Ontario takes 13h 22m

There are no direct flights from London to Ontario. There are no popular flight routes from London to Ontario.

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Frequently asked questions about flying from London to Ontario

How far is London to Ontario by plane?
There are 5417.5 mi between London and Ontario. Flights usually cover this in 13h 22m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London to Ontario Airport?
Prices for flights from London to Ontario Airport are refreshed on a daily basis.
How many operators does momondo search for flights from London to Ontario Airport?
As of May 2026, there are 3 operators available to choose from for flights from London to Ontario Airport.
How old do you have to be to fly from London to Ontario Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London 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 to Ontario?
momondo data reveals that the most frequently booked airline on the route from London to Ontario is British Airways, representing 56% of all bookings. The subsequent popular airlines are Virgin Atlantic at 35% and United Airlines at 9%.

Best airlines flying from London to Ontario

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom £365	Free Cancellation	Rating 7.4 9,680 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £369	Free Cancellation	Rating 7.4 688 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £375	Free Cancellation	Rating 6.7 7,943 reviews	Search British Airways flights

Why use momondo?

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

Finding the right flight to Ontario from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ontario quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Ontario from London with this policy.

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

momondo provides multiple filters to help you find the best flight to Ontario from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are not ready to book a flight from London to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.