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

Phoenix (PHX) was the most common stop: 56% of momondo users choosing one-stop flights on this route connected there.

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

Phoenix (PHX) has the shortest average stopover time for this route: 2h 17m.

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 44% 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 Seattle (SEA) offer the lowest average return price of £314.

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.

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

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

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 August 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.

£343 Cheap Flights from London to Ontario in 2026

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Find the cheapest flights from London to Los Angeles

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

09:30 - 20:20

LHR

ONT

18h 50m

2 stops

06:00 - 07:25

ONT

LHR

17h 25m

1 stop

£444United Airlines

Fri, 11 Dec - Thu, 31 Dec

09:00 - 20:15

LHR

ONT

19h 15m

2 stops

06:00 - 07:40

ONT

LHR

17h 40m

1 stop

£446United Airlines

Wed, 18 Nov - Thu, 19 Nov

09:00 - 20:15

LHR

ONT

19h 15m

2 stops

13:29 - 21:20

ONT

LHR

23h 51m

2 stops

£448United Airlines

Wed, 18 Nov - Thu, 19 Nov

17:00 - 11:04

LHR

ONT

26h 04m

1 stop

15:14 - 15:05

ONT

LHR

15h 51m

1 stop

£463Alaska Airlines

Sat, 5 Sep - Sat, 26 Sep

17:00 - 23:24

LHR

ONT

14h 24m

1 stop

12:12 - 15:05

ONT

LHR

18h 53m

1 stop

£463Alaska Airlines

Thu, 17 Sep - Mon, 21 Sep

17:00 - 23:24

LHR

ONT

14h 24m

1 stop

06:02 - 12:20

ONT

LHR

23h 18m

1 stop

£465Alaska Airlines

Fri, 2 Oct - Wed, 28 Oct

10:55 - 16:35

LHR

ONT

13h 40m

1 stop

12:17 - 06:25

ONT

LHR

34h 08m

1 stop

£466Virgin Atlantic

Sat, 12 Sep - Sat, 19 Sep

20:55 - 22:23

LHR

ONT

33h 28m

2 stops

13:04 - 13:05

ONT

LHR

40h 01m

2 stops

£467Virgin Atlantic

Fri, 4 Sep - Fri, 25 Sep

10:15 - 18:44

LHR

ONT

15h 29m

1 stop

14:56 - 12:00

ONT

LHR

13h 04m

1 stop

£472British Airways

Wed, 28 Oct - Tue, 8 Dec

10:05 - 23:43

LHR

ONT

21h 38m

1 stop

12:46 - 12:00

ONT

LHR

15h 14m

1 stop

£472British Airways

Wed, 4 Nov - Fri, 4 Dec

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Iberia flights from London to Ontario

Our best Iberia deals on London to Ontario flight tickets

Iberia

28 Aug

LGW11:30London Gatwick

19h 29m

2 stops

ONT22:59Ontario

18 Sept

ONT14:22Ontario

21h 38m

2 stops

LGW20:00London Gatwick

£550

Iberia

26 Aug

LGW11:30London Gatwick

19h 29m

2 stops

ONT22:59Ontario

16 Sept

ONT14:22Ontario

21h 38m

2 stops

LGW20:00London Gatwick

£563

Iberia

17 Aug

LGW20:40London Gatwick

34h 19m

2 stops

ONT22:59Ontario

28 Aug

ONT14:27Ontario

21h 33m

2 stops

LGW20:00London Gatwick

£592

Lufthansa flights from London to Ontario

Our best Lufthansa deals on London to Ontario flight tickets

Lufthansa

7 Sept

LHR10:00London Heathrow

19h 59m

1 stop

ONT21:59Ontario

7 Oct

ONT13:24Ontario

12h 16m

1 stop

LHR09:40London Heathrow

£475

Lufthansa

2 Sept

LHR14:50London Heathrow

14h 04m

1 stop

ONT20:54Ontario

7 Sept

ONT13:18Ontario

15h 07m

1 stop

LHR12:25London Heathrow

£488

Lufthansa

14 Aug

LHR14:50London Heathrow

14h 03m

1 stop

ONT20:53Ontario

21 Aug

ONT13:18Ontario

12h 22m

1 stop

LHR09:40London Heathrow

£530

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 11/12

09:30-20:20

2 stops18h 50m

Ontario

Thu 31/12

06:00-07:25

1 stop17h 25m

£444

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 18/11

09:00-20:15

2 stops19h 15m

Ontario

Thu 19/11

06:00-07:40

1 stop17h 40m

£446

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 18/11

09:00-20:15

2 stops19h 15m

Ontario

Thu 19/11

13:29-21:20

2 stops23h 51m

£448

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 5/9

17:00-11:04

1 stop26h 04m

Ontario

Sat 26/9

15:14-15:05

1 stop15h 51m

£463

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 17/9

17:00-23:24

1 stop14h 24m

Ontario

Mon 21/9

12:12-15:05

1 stop18h 53m

£463

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 2/10

17:00-23:24

1 stop14h 24m

Ontario

Wed 28/10

06:02-12:20

1 stop23h 18m

£465

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 12/9

10:55-16:35

1 stop13h 40m

Ontario

Sat 19/9

12:17-06:25

1 stop34h 08m

£466

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 4/9

20:55-22:23

2 stops33h 28m

Ontario

Fri 25/9

13:04-13:05

2 stops40h 01m

£467

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 28/10

10:15-18:44

1 stop15h 29m

Ontario

Tue 8/12

14:56-12:00

1 stop13h 04m

£472

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 4/11

10:05-23:43

1 stop21h 38m

Ontario

Fri 4/12

12:46-12:00

1 stop15h 14m

£472

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?

Prices are currently typical for flights on this route.

Typical prices usually range from £400 to £551.
The lowest price recently found on this route was £444.

What is the cheapest month to fly to Ontario?

The month of January is, on average, the cheapest month to fly to Ontario from London, with most prices found around £410. If you’re not able to fly to Ontario in January, then September is your next best option. Flight prices from London to Ontario during September average around £423.

Can stopping save me money on London to Ontario flights?

You could potentially save up to 47% 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 45m
Direct flights	None

The fastest flight from London to Ontario takes 13h 45m

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 45m, 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 August 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 Virgin Atlantic, representing 45% of all bookings. The subsequent popular airlines are British Airways at 45% and United Airlines at 10%.

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 £368	Free Cancellation	Rating 7.4 10,061 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £372	Free Cancellation	Rating 7.5 694 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £398	Free Cancellation	Rating 6.7 8,135 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.