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

Dallas (DFW) was the most common stop: 46% of momondo users choosing one-stop flights on this route connected there.

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 43% of people opting to fly with this airline when travelling to Ontario. Keep in mind that there are 23 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?

Salt Lake City (SLC) has the shortest average stopover time for this route: 1h 08m.

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

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

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

Flights via Seattle (SEA) offer the lowest average return price of £432.

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

Flights connecting via Salt Lake City (SLC) have the shortest average one-way travel time: 13h 31m.

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 2025, 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.

£371 Cheap Flights from London to Ontario in 2025

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 £582 to £898. The lowest price recently found on this route was £410.

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Find the cheapest flights from London to Los Angeles

Round-trip

One-way

Last minute

Cheap return flights

08:20 - 22:33LHR-ONT

22h 13m1 stop

12:47 - 12:45ONT-LHR

15h 58m1 stop

£410British Airways

Find Deal

Sat, 13 Sep - Sat, 20 Sep

14:55 - 22:42LHR-ONT

14h 47m1 stop

16:47 - 13:15ONT-LHR

12h 28m1 stop

£412British Airways

Find Deal

Tue, 28 Oct - Tue, 4 Nov

10:40 - 21:39LGW-ONT

18h 59m2 stops

19:16 - 08:10ONT-LGW

28h 54m2 stops

£414American Airlines

Find Deal

Fri, 29 Aug - Thu, 11 Sep

10:15 - 18:22LHR-ONT

16h 07m1 stop

08:48 - 08:15ONT-LHR

15h 27m1 stop

£414British Airways

Find Deal

Sun, 23 Nov - Sat, 6 Dec

06:20 - 16:14LHR-ONT

17h 54m2 stops

06:45 - 13:05ONT-LHR

22h 20m1 stop

£416Virgin Atlantic

Find Deal

Sun, 23 Nov - Sat, 6 Dec

06:20 - 16:14LHR-ONT

17h 54m2 stops

07:00 - 10:35ONT-LHR

19h 35m1 stop

£418Virgin Atlantic

Find Deal

Sun, 23 Nov - Sat, 6 Dec

12:00 - 18:25LHR-ONT

14h 25m1 stop

16:45 - 12:50ONT-LHR

12h 05m1 stop

£428American Airlines

Find Deal

Sun, 24 Aug - Tue, 9 Sep

14:20 - 22:41LHR-ONT

16h 21m1 stop

12:00 - 10:35ONT-LHR

14h 35m1 stop

£431KLM

Find Deal

Sun, 16 Nov - Mon, 24 Nov

16:25 - 23:59LHR-ONT

15h 34m1 stop

14:54 - 12:45ONT-LHR

13h 51m1 stop

£462Finnair

Find Deal

Sun, 14 Sep - Tue, 30 Sep

12:00 - 19:11LGW-ONT

39h 11m2 stops

11:45 - 10:00ONT-LGW

38h 15m2 stops

£709KLM

Find Deal

Sat, 30 Aug - Sat, 6 Sep

Delta flights from London to Ontario

Our best Delta deals on London to Ontario flight tickets

Delta

14 Sept

LHR08:40London Heathrow

21h 43m

2 stops

ONT22:23Ontario

21 Sept

ONT11:50Ontario

18h 25m

1 stop

LHR14:15London Heathrow

£433

Find similar

Delta

30 Aug

LHR06:30London Heathrow

18h 41m

2 stops

ONT17:11Ontario

5 Sept

ONT07:05Ontario

19h 10m

2 stops

LHR10:15London Heathrow

£468

Find similar

Delta

12 Aug

LHR06:30London Heathrow

20h 41m

2 stops

ONT19:11Ontario

17 Aug

ONT09:50Ontario

19h 20m

2 stops

LHR13:10London Heathrow

£505

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Iberia flights from London to Ontario

Our best Iberia deals on London to Ontario flight tickets

Iberia

20 Sept

LHR06:15London Heathrow

20h 39m

2 stops

ONT18:54Ontario

3 Oct

ONT10:54Ontario

19h 31m

1 stop

LHR14:25London Heathrow

£437

Find similar

Iberia

13 Sept

LHR07:35London Heathrow

22h 58m

2 stops

ONT22:33Ontario

20 Sept

ONT10:53Ontario

19h 32m

1 stop

LHR14:25London Heathrow

£438

Find similar

Iberia

4 Oct

LHR07:35London Heathrow

22h 58m

2 stops

ONT22:33Ontario

18 Oct

ONT14:51Ontario

18h 24m

2 stops

LHR17:15London Heathrow

£449

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 13/9

08:20-22:33

1 stop22h 13m

Ontario

Sat 20/9

12:47-12:45

1 stop15h 58m

£410

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 28/10

14:55-22:42

1 stop14h 47m

Ontario

Tue 4/11

16:47-13:15

1 stop12h 28m

£412

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Fri 29/8

10:40-21:39

2 stops18h 59m

Ontario

Thu 11/9

19:16-08:10

2 stops28h 54m

£414

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 23/11

10:15-18:22

1 stop16h 07m

Ontario

Sat 6/12

08:48-08:15

1 stop15h 27m

£414

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 23/11

06:20-16:14

2 stops17h 54m

Ontario

Sat 6/12

06:45-13:05

1 stop22h 20m

£416

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 23/11

06:20-16:14

2 stops17h 54m

Ontario

Sat 6/12

07:00-10:35

1 stop19h 35m

£418

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 24/8

12:00-18:25

1 stop14h 25m

Ontario

Tue 9/9

16:45-12:50

1 stop12h 05m

£428

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 16/11

14:20-22:41

1 stop16h 21m

Ontario

Mon 24/11

12:00-10:35

1 stop14h 35m

£431

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 14/9

16:25-23:59

1 stop15h 34m

Ontario

Tue 30/9

14:54-12:45

1 stop13h 51m

£462

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Sat 30/8

12:00-19:11

2 stops39h 11m

Ontario

Sat 6/9

11:45-10:00

2 stops38h 15m

£709

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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 February is, on average, the cheapest month to fly to Ontario from London, with most prices found around £413. If you’re not able to fly to Ontario in February, then January is your next best option. Flight prices from London to Ontario during January average around £422.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Wednesday when prices can be found for as low as £497. This is often the case because there is less demand to fly during this day of the week. Flights from London to Ontario on a Sunday will generally be more expensive and average around £574. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Ontario?

Flying to Ontario from London in the evening is the least expensive time of day to depart. momondo users have found prices as low as £486 when looking at flights departing in the evening. In contrast, the most expensive time of day to depart to Ontario is at midday when prices are around £571.

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 £536 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 £445 on momondo.

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

Best price found	£471
Fastest flight time	13h 53m
Direct flights	None
Airports in Ontario	1 airport

The best one-way flight to Ontario from London in the past 72 hours is £471. The best return flight deal from London to Ontario found on momondo in the last 72 hours is £410.

The fastest flight from London to Ontario takes 13h 53m

There are no direct flights from London to Ontario. Popular non-direct routes for this connection are London City Airport - Ontario Airport, London Heathrow Airport - Ontario Airport and London Gatwick Airport - Ontario Airport.

There is 1 airport near Ontario: Ontario (ONT)

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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 53m, 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 2025, 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 36% of all bookings. The subsequent popular airlines are Virgin Atlantic at 26%, United Airlines at 14%, and Lufthansa 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
Finnair	PriceFrom £283	Free Cancellation	Rating 7.6 1,316 reviews	Search Finnair flights
British Airways	PriceFrom £384	Free Cancellation	Rating 6.6 7,222 reviews	Search British Airways flights
KLM	PriceFrom £400	Free Cancellation	Rating 7.8 1,383 reviews	Search KLM flights
United Airlines	PriceFrom £401	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £422	Free Cancellation	Rating 7.4 655 reviews	Search Virgin Atlantic flights
Lufthansa	PriceFrom £437	Free Cancellation	Rating 6.8 7,275 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.