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 has the shortest connection time from London to Ontario?

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

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

Flights via Phoenix (PHX) offer the lowest average return price of £409.

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 00m.

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

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

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

Seattle (SEA) was the most common stop: 40% of momondo users choosing one-stop flights on this route connected there.

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 March 2026, there are 5 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.

£327 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 high for flights on this route. Typical prices usually range from £413 to £429. The lowest price recently found on this route was £451.

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Find the cheapest flights from London to Los Angeles

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One-way

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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

10:05 - 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

10:05 - 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

14:00 - 11:34

LGW

ONT

29h 34m

2 stops

23:59 - 06:50

ONT

LGW

22h 51m

2 stops

£488American Airlines

Mon, 4 May - Sat, 9 May

12:20 - 10:05

LGW

ONT

29h 45m

2 stops

23:59 - 06:50

ONT

LGW

22h 51m

2 stops

£489American Airlines

Sat, 25 Apr - Sat, 9 May

12:20 - 23:46

LGW

ONT

19h 26m

2 stops

14:08 - 08:40

ONT

LGW

34h 32m

2 stops

£512Multiple Airlines

Sun, 10 May - Sat, 16 May

11:30 - 23:46

LGW

ONT

20h 16m

2 stops

14:08 - 20:00

ONT

LGW

21h 52m

2 stops

£558Iberia

Mon, 27 Apr - Mon, 4 May

11:30 - 23:46

LGW

ONT

20h 16m

2 stops

14:08 - 20:00

ONT

LGW

21h 52m

2 stops

£623Iberia

Thu, 16 Apr - Thu, 23 Apr

United Airlines flights from London to Ontario

Our best United Airlines deals on London 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

British Airways flights from London to Ontario

Our best British Airways deals on London 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

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

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

Tue 14/4

10:05-16:22

1 stop14h 17m

Ontario

Fri 24/4

10:59-08:05

1 stop13h 06m

£465

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Mon 4/5

14:00-11:34

2 stops29h 34m

Ontario

Sat 9/5

23:59-06:50

2 stops22h 51m

£488

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Sat 25/4

12:20-10:05

2 stops29h 45m

Ontario

Sat 9/5

23:59-06:50

2 stops22h 51m

£489

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Sun 10/5

12:20-23:46

2 stops19h 26m

Ontario

Sat 16/5

14:08-08:40

2 stops34h 32m

£512

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Mon 27/4

11:30-23:46

2 stops20h 16m

Ontario

Mon 4/5

14:08-20:00

2 stops21h 52m

£558

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Thu 16/4

11:30-23:46

2 stops20h 16m

Ontario

Thu 23/4

14:08-20:00

2 stops21h 52m

£623

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 September is, on average, the cheapest month to fly to Ontario from London, with most prices found around £409. If you’re not able to fly to Ontario in September, then February is your next best option. Flight prices from London to Ontario during February average around £419.

How far in advance should I book a flight 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 £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 for as low as £372 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 46m
Direct flights	None

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

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

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How far is London to Ontario by plane?
There are 5417.5 mi between London and Ontario. Flights usually cover this in 13h 46m, 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 March 2026, there are 5 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 52% of all bookings. The subsequent popular airlines are Virgin Atlantic at 30%, United Airlines at 11%, and Lufthansa 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 £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?

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.