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.

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

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

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

Dallas (DFW) was the most common stop: 45% 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 46% of people opting to fly with this airline when travelling to Ontario. Keep in mind that there are 22 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 £428.

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 December 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.

£297 Cheap Flights from London to Ontario in 2025/26

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 £523 to £626. The lowest price recently found on this route was £460.

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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.

07:35 - 22:48

LHR

ONT

23h 13m2 stops

15:09 - 12:15

ONT

LHR

13h 06m1 stop

£460British Airways

Wed, 28 Jan - Wed, 4 Feb

07:30 - 20:58

LHR

ONT

21h 28m2 stops

13:53 - 12:00

ONT

LHR

14h 07m1 stop

£476United Airlines

Tue, 13 Jan - Tue, 20 Jan

15:05 - 22:34

LHR

ONT

14h 29m1 stop

13:20 - 09:50

ONT

LHR

12h 30m1 stop

£477Virgin Atlantic

Sat, 28 Mar - Tue, 31 Mar

10:05 - 22:48

LHR

ONT

20h 43m1 stop

15:09 - 12:15

ONT

LHR

13h 06m1 stop

£480British Airways

Tue, 13 Jan - Tue, 20 Jan

10:45 - 22:38

LHR

ONT

19h 53m1 stop

12:41 - 07:50

ONT

LHR

35h 09m1 stop

£495Virgin Atlantic

Sun, 11 Jan - Sun, 18 Jan

11:20 - 17:13

LHR

ONT

13h 53m1 stop

11:59 - 09:00

ONT

LHR

13h 01m1 stop

£496Delta

Sun, 29 Mar - Sun, 5 Apr

10:05 - 17:43

LHR

ONT

15h 38m1 stop

13:00 - 09:40

ONT

LHR

12h 40m1 stop

£499United Airlines

Mon, 19 Jan - Mon, 5 Oct

13:05 - 21:04

LHR

ONT

15h 59m1 stop

13:20 - 09:50

ONT

LHR

12h 30m1 stop

£509Delta

Wed, 1 Apr - Tue, 7 Apr

20:05 - 21:05

LCY

ONT

33h 00m2 stops

12:41 - 16:35

ONT

LCY

19h 54m2 stops

£538KLM

Tue, 13 Jan - Tue, 20 Jan

20:05 - 21:05

LCY

ONT

33h 00m2 stops

22:30 - 07:15

ONT

LCY

24h 45m2 stops

£545KLM

Wed, 28 Jan - Wed, 4 Feb

Virgin Atlantic flights from London to Ontario

Our best Virgin Atlantic deals on London to Ontario flight tickets

Virgin Atlantic

28 Mar

LHR15:05London Heathrow

14h 29m

1 stop

ONT22:34Ontario

31 Mar

ONT13:20Ontario

12h 30m

1 stop

LHR09:50London Heathrow

£477

Find similar

Virgin Atlantic

11 Jan

LHR10:45London Heathrow

19h 53m

1 stop

ONT22:38Ontario

18 Jan

ONT12:41Ontario

35h 09m

1 stop

LHR07:50London Heathrow

£495

Find similar

Virgin Atlantic

20 Feb

LHR12:20London Heathrow

18h 17m

1 stop

ONT22:37Ontario

22 Feb

ONT07:30Ontario

19h 00m

1 stop

LHR10:30London Heathrow

£502

Find similar

Iberia flights from London to Ontario

Our best Iberia deals on London to Ontario flight tickets

Iberia

6 Feb

LHR15:00London Heathrow

15h 48m

1 stop

ONT22:48Ontario

27 Feb

ONT10:59Ontario

13h 16m

1 stop

LHR08:15London Heathrow

£517

Find similar

Iberia

11 Feb

LHR15:00London Heathrow

15h 48m

1 stop

ONT22:48Ontario

19 Feb

ONT10:59Ontario

13h 16m

1 stop

LHR08:15London Heathrow

£527

Find similar

Iberia

5 Feb

LHR15:00London Heathrow

15h 48m

1 stop

ONT22:48Ontario

8 Feb

ONT10:58Ontario

15h 02m

1 stop

LHR10:00London Heathrow

£532

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 28/1

07:35-22:48

2 stops23h 13m

Ontario

Wed 4/2

15:09-12:15

1 stop13h 06m

£460

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 13/1

07:30-20:58

2 stops21h 28m

Ontario

Tue 20/1

13:53-12:00

1 stop14h 07m

£476

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 28/3

15:05-22:34

1 stop14h 29m

Ontario

Tue 31/3

13:20-09:50

1 stop12h 30m

£477

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 13/1

10:05-22:48

1 stop20h 43m

Ontario

Tue 20/1

15:09-12:15

1 stop13h 06m

£480

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 11/1

10:45-22:38

1 stop19h 53m

Ontario

Sun 18/1

12:41-07:50

1 stop35h 09m

£495

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 29/3

11:20-17:13

1 stop13h 53m

Ontario

Sun 5/4

11:59-09:00

1 stop13h 01m

£496

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 19/1

10:05-17:43

1 stop15h 38m

Ontario

Mon 5/10

13:00-09:40

1 stop12h 40m

£499

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/4

13:05-21:04

1 stop15h 59m

Ontario

Tue 7/4

13:20-09:50

1 stop12h 30m

£509

LondonOntario

LCY - ONT

LCYONT

London City

Tue 13/1

20:05-21:05

2 stops33h 00m

Ontario

Tue 20/1

12:41-16:35

2 stops19h 54m

£538

LondonOntario

LCY - ONT

LCYONT

London City

Wed 28/1

20:05-21:05

2 stops33h 00m

Ontario

Wed 4/2

22:30-07:15

2 stops24h 45m

£545

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 £408. 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 £412.

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 £492. 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 £568. 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 £481 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 £565.

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 £535 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 £394 on momondo.

Can stopping save me money on London to Ontario flights?

You could potentially save up to 35% 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.

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 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 December 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 40% of all bookings. The subsequent popular airlines are Virgin Atlantic at 21%, United Airlines at 14%, and Lufthansa at 11%.

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 £280	Free Cancellation	Rating 7.6 1,337 reviews	Search Finnair flights
Virgin Atlantic	PriceFrom £376	Free Cancellation	Rating 7.5 675 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £387	Free Cancellation	Rating 6.7 7,579 reviews	Search British Airways flights
United Airlines	PriceFrom £387	Free Cancellation	Rating 7.4 9,093 reviews	Search United Airlines flights
KLM	PriceFrom £396	Free Cancellation	Rating 7.7 1,432 reviews	Search KLM flights
Lufthansa	PriceFrom £433	Free Cancellation	Rating 6.8 7,631 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.