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

Flights via Phoenix (PHX) offer the lowest average return price of £406.

Which airlines fly to Ontario?

Virgin Atlantic, British Airways and United Airlines 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 46% 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 to Ontario?

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

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

Phoenix (PHX) was the most common stop: 63% of momondo users choosing one-stop flights on this route connected there.

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

Alaska Airlines, British Airways, and United Airlines 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 June 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.

£347 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 £834 to £584. The lowest price recently found on this route was £417.

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Find the cheapest flights from London to Los Angeles

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

06:55 - 20:42

LHR

ONT

21h 47m

2 stops

05:45 - 20:40

ONT

LHR

30h 55m

2 stops

£417United Airlines

Thu, 9 Jul - Fri, 17 Jul

06:55 - 18:11

LHR

ONT

19h 16m

2 stops

05:00 - 09:40

ONT

LHR

20h 40m

1 stop

£417United Airlines

Mon, 7 Sep - Mon, 28 Sep

09:30 - 23:06

LHR

ONT

21h 36m

2 stops

06:02 - 06:20

ONT

LHR

16h 18m

2 stops

£418United Airlines

Fri, 13 Nov - Tue, 17 Nov

07:30 - 20:20

LHR

ONT

20h 50m

2 stops

06:00 - 07:25

ONT

LHR

17h 25m

1 stop

£419United Airlines

Fri, 13 Nov - Tue, 17 Nov

10:25 - 22:51

LHR

ONT

20h 26m

2 stops

06:00 - 11:10

ONT

LHR

21h 10m

1 stop

£432Lufthansa

Thu, 9 Jul - Mon, 20 Jul

16:15 - 12:12

LHR

ONT

27h 57m

1 stop

06:10 - 06:45

ONT

LHR

16h 35m

1 stop

£432Lufthansa

Wed, 1 Jul - Thu, 30 Jul

17:40 - 20:42

LHR

ONT

35h 02m

2 stops

05:00 - 10:00

ONT

LHR

21h 00m

2 stops

£439Air Canada

Thu, 2 Jul - Thu, 30 Jul

20:15 - 22:43

LCY

ONT

34h 28m

2 stops

07:00 - 09:30

ONT

LCY

18h 30m

2 stops

£492Virgin Atlantic

Mon, 5 Oct - Mon, 12 Oct

20:40 - 23:59

LGW

ONT

35h 19m

2 stops

07:06 - 20:00

ONT

LGW

28h 54m

2 stops

£599British Airways

Tue, 7 Jul - Wed, 5 Aug

20:40 - 23:59

LGW

ONT

35h 19m

2 stops

10:29 - 20:00

ONT

LGW

25h 31m

2 stops

£654British Airways

Tue, 7 Jul - Mon, 10 Aug

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Air Canada flights from London to Ontario

Our best Air Canada deals on London to Ontario flight tickets

Air Canada

2 Jul

LHR17:40London Heathrow

35h 02m

2 stops

ONT20:42Ontario

30 Jul

ONT05:00Ontario

21h 00m

2 stops

LHR10:00London Heathrow

£439

Air Canada

2 Jul

LHR17:40London Heathrow

35h 02m

2 stops

ONT20:42Ontario

30 Jul

ONT06:00Ontario

16h 35m

2 stops

LHR06:35London Heathrow

£454

Air Canada

2 Jul

LHR17:40London Heathrow

35h 02m

2 stops

ONT20:42Ontario

16 Jul

ONT06:00Ontario

16h 35m

2 stops

LHR06:35London Heathrow

£455

British Airways flights from London to Ontario

Our best British Airways deals on London to Ontario flight tickets

British Airways

2 Jul

LHR15:00London Heathrow

15h 34m

1 stop

ONT22:34Ontario

8 Jul

ONT14:15Ontario

16h 10m

1 stop

LHR14:25London Heathrow

£447

British Airways

1 Jul

LHR16:25London Heathrow

15h 34m

1 stop

ONT23:59Ontario

30 Jul

ONT12:35Ontario

16h 15m

1 stop

LHR12:50London Heathrow

£448

British Airways

2 Jul

LHR15:00London Heathrow

15h 34m

1 stop

ONT22:34Ontario

7 Jul

ONT14:15Ontario

16h 10m

1 stop

LHR14:25London Heathrow

£471

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 9/7

06:55-20:42

2 stops21h 47m

Ontario

Fri 17/7

05:45-20:40

2 stops30h 55m

£417

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 7/9

06:55-18:11

2 stops19h 16m

Ontario

Mon 28/9

05:00-09:40

1 stop20h 40m

£417

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 13/11

09:30-23:06

2 stops21h 36m

Ontario

Tue 17/11

06:02-06:20

2 stops16h 18m

£418

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 13/11

07:30-20:20

2 stops20h 50m

Ontario

Tue 17/11

06:00-07:25

1 stop17h 25m

£419

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 9/7

10:25-22:51

2 stops20h 26m

Ontario

Mon 20/7

06:00-11:10

1 stop21h 10m

£432

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/7

16:15-12:12

1 stop27h 57m

Ontario

Thu 30/7

06:10-06:45

1 stop16h 35m

£432

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 2/7

17:40-20:42

2 stops35h 02m

Ontario

Thu 30/7

05:00-10:00

2 stops21h 00m

£439

LondonOntario

LCY - ONT

LCYONT

London City

Mon 5/10

20:15-22:43

2 stops34h 28m

Ontario

Mon 12/10

07:00-09:30

2 stops18h 30m

£492

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Tue 7/7

20:40-23:59

2 stops35h 19m

Ontario

Wed 5/8

07:06-20:00

2 stops28h 54m

£599

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Tue 7/7

20:40-23:59

2 stops35h 19m

Ontario

Mon 10/8

10:29-20:00

2 stops25h 31m

£654

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 March is, on average, the cheapest month to fly to Ontario from London, with most prices found around £297. If you’re not able to fly to Ontario in March, then February is your next best option. Flight prices from London to Ontario during February average around £312.

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 £496 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 £370 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 27m
Direct flights	None

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

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 27m, 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 June 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 50% of all bookings. The subsequent popular airlines are Virgin Atlantic at 42% and United Airlines at 7%.

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 £370	Free Cancellation	Rating 7.4 9,824 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £374	Free Cancellation	Rating 7.5 690 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £388	Free Cancellation	Rating 6.7 8,049 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.