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.

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

Dallas (DFW) was the most common stop: 35% of momondo users choosing one-stop flights on this route connected there.

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

Flights via Seattle (SEA) offer the lowest average return price of £416.

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

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

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

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 January 2026, there are 6 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.

£242 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 £384 to £503. The lowest price recently found on this route was £348.

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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.

20:25 - 22:37

LHR

ONT

34h 12m

2 stops

11:59 - 11:55

ONT

LHR

16h 56m

1 stop

£348Virgin Atlantic

Mon, 2 Mar - Mon, 9 Mar

14:30 - 22:37

LHR

ONT

16h 07m

1 stop

13:20 - 10:00

ONT

LHR

13h 40m

1 stop

£361Virgin Atlantic

Mon, 2 Mar - Mon, 9 Mar

09:30 - 22:57

LHR

ONT

20h 27m

2 stops

18:37 - 20:35

ONT

LHR

18h 58m

2 stops

£364United Airlines

Mon, 16 Mar - Mon, 23 Mar

09:30 - 20:50

LHR

ONT

19h 20m

2 stops

13:40 - 12:00

ONT

LHR

14h 20m

1 stop

£371United Airlines

Thu, 26 Feb - Thu, 5 Mar

12:30 - 21:05

LHR

ONT

16h 35m

1 stop

13:10 - 10:00

ONT

LHR

12h 50m

1 stop

£381Delta

Tue, 10 Feb - Mon, 2 Mar

10:25 - 22:37

LGW

ONT

20h 12m

2 stops

14:00 - 16:00

ONT

LGW

18h 00m

2 stops

£394Delta

Mon, 27 Apr - Sat, 9 May

11:20 - 10:06

LGW

ONT

29h 46m

2 stops

06:00 - 10:50

ONT

LGW

21h 50m

2 stops

£423Multiple Airlines

Tue, 17 Mar - Tue, 24 Mar

11:45 - 22:29

LGW

ONT

42h 44m

2 stops

07:00 - 10:50

ONT

LGW

20h 50m

2 stops

£452Iberia

Wed, 4 Mar - Tue, 24 Mar

19:40 - 23:59

LGW

ONT

35h 19m

2 stops

14:39 - 20:00

ONT

LGW

21h 21m

2 stops

£469Iberia

Tue, 17 Mar - Mon, 30 Mar

20:30 - 22:09

LCY

ONT

33h 39m

2 stops

22:59 - 17:20

ONT

LCY

34h 21m

2 stops

£1,124Multiple Airlines

Mon, 22 Jun - Sat, 11 Jul

British Airways flights from London to Ontario

Our best British Airways deals on London to Ontario flight tickets

British Airways

19 Feb

LHR16:30London Heathrow

15h 29m

1 stop

ONT23:59Ontario

24 Feb

ONT17:02Ontario

12h 13m

1 stop

LHR13:15London Heathrow

£397

British Airways

6 Feb

LHR14:25London Heathrow

15h 48m

1 stop

ONT22:13Ontario

17 Mar

ONT10:56Ontario

12h 54m

1 stop

LHR06:50London Heathrow

£415

British Airways

12 Feb

LHR16:30London Heathrow

15h 29m

1 stop

ONT23:59Ontario

15 Feb

ONT17:02Ontario

12h 13m

1 stop

LHR13:15London Heathrow

£418

KLM flights from London to Ontario

Our best KLM deals on London to Ontario flight tickets

KLM

24 Mar

LHR14:30London Heathrow

15h 04m

1 stop

ONT22:34Ontario

22 Apr

ONT13:29Ontario

12h 31m

1 stop

LHR10:00London Heathrow

£389

KLM

9 Feb

LHR15:50London Heathrow

37h 15m

1 stop

ONT21:05Ontario

15 Feb

ONT22:20Ontario

29h 20m

1 stop

LHR11:40London Heathrow

£400

KLM

19 Feb

LHR15:50London Heathrow

37h 15m

1 stop

ONT21:05Ontario

24 Feb

ONT13:15Ontario

14h 25m

1 stop

LHR11:40London Heathrow

£402

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 2/3

20:25-22:37

2 stops34h 12m

Ontario

Mon 9/3

11:59-11:55

1 stop16h 56m

£348

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 2/3

14:30-22:37

1 stop16h 07m

Ontario

Mon 9/3

13:20-10:00

1 stop13h 40m

£361

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 16/3

09:30-22:57

2 stops20h 27m

Ontario

Mon 23/3

18:37-20:35

2 stops18h 58m

£364

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/2

09:30-20:50

2 stops19h 20m

Ontario

Thu 5/3

13:40-12:00

1 stop14h 20m

£371

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 10/2

12:30-21:05

1 stop16h 35m

Ontario

Mon 2/3

13:10-10:00

1 stop12h 50m

£381

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Mon 27/4

10:25-22:37

2 stops20h 12m

Ontario

Sat 9/5

14:00-16:00

2 stops18h 00m

£394

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Tue 17/3

11:20-10:06

2 stops29h 46m

Ontario

Tue 24/3

06:00-10:50

2 stops21h 50m

£423

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Wed 4/3

11:45-22:29

2 stops42h 44m

Ontario

Tue 24/3

07:00-10:50

2 stops20h 50m

£452

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Tue 17/3

19:40-23:59

2 stops35h 19m

Ontario

Mon 30/3

14:39-20:00

2 stops21h 21m

£469

LondonOntario

LCY - ONT

LCYONT

London City

Mon 22/6

20:30-22:09

2 stops33h 39m

Ontario

Sat 11/7

22:59-17:20

2 stops34h 21m

£1,124

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 January is, on average, the cheapest month to fly to Ontario from London, with most prices found around £397. 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 £398.

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 £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 £384 on momondo.

Can stopping save me money on London to Ontario flights?

You could potentially save up to 5% 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 30m
Direct flights	None

The fastest flight from London to Ontario takes 13h 30m

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

Search flight deals

How far is London to Ontario by plane?
There are 5417.5 mi between London and Ontario. Flights usually cover this in 13h 30m, 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 January 2026, there are 6 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 38% of all bookings. The subsequent popular airlines are Virgin Atlantic at 26%, United Airlines at 13%, and Lufthansa 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
Finnair	PriceFrom £273	Free Cancellation	Rating 7.6 1,356 reviews	Search Finnair flights
United Airlines	PriceFrom £361	Free Cancellation	Rating 7.4 9,219 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £367	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £377	Free Cancellation	Rating 6.7 7,706 reviews	Search British Airways flights
KLM	PriceFrom £385	Free Cancellation	Rating 7.7 1,444 reviews	Search KLM flights
Lufthansa	PriceFrom £414	Free Cancellation	Rating 6.8 7,758 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.