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

United Airlines and KLM are the most popular carriers operating from Ontario to London Heathrow

Which airlines fly to London Heathrow Airport?

Virgin Atlantic, British Airways and Iberia are the top three most popular airlines that fly to London Heathrow Airport from Ontario according to our data. Virgin Atlantic is the first choice among our users, with 49% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 12 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Ontario Airport to London Heathrow Airport?

Prices for flights from Ontario Airport to London Heathrow Airport refresh daily.

How old do you have to be to fly from Ontario Airport to London Heathrow Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to London Heathrow Airport.

What documentation or ID do you need to fly to London Heathrow Airport?

The travel and health documents you'll need for your trip to London Heathrow 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 London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

£229 Cheap Flights from Ontario to London Heathrow Airport in 2025/26

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Find the cheapest flights from Ontario to London

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06:00 - 06:50ONT-LHR

17h 50m1 stop

06:00 - 22:48LHR-ONT

23h 48m2 stops

£433Iberia

Find Deal

Tue, 10 Mar - Tue, 17 Mar

10:58 - 08:35ONT-LHR

13h 37m1 stop

07:30 - 22:48LHR-ONT

23h 18m2 stops

£434Iberia

Find Deal

Wed, 21 Jan - Thu, 29 Jan

10:58 - 08:35ONT-LHR

13h 37m1 stop

06:00 - 18:45LHR-ONT

20h 45m2 stops

£439British Airways

Find Deal

Tue, 13 Jan - Tue, 20 Jan

10:56 - 06:50ONT-LHR

12h 54m1 stop

10:15 - 18:42LHR-ONT

15h 27m1 stop

£445British Airways

Find Deal

Tue, 10 Mar - Tue, 17 Mar

16:45 - 13:15ONT-LHR

12h 30m1 stop

10:35 - 18:39LHR-ONT

16h 04m1 stop

£448British Airways

Find Deal

Mon, 2 Feb - Thu, 19 Feb

07:30 - 10:30ONT-LHR

19h 00m1 stop

06:20 - 21:05LHR-ONT

22h 45m2 stops

£450Delta

Find Deal

Wed, 14 Jan - Wed, 21 Jan

07:16 - 10:00ONT-LHR

18h 44m1 stop

07:30 - 22:48LHR-ONT

23h 18m2 stops

£453Iberia

Find Deal

Fri, 16 Jan - Thu, 22 Jan

15:30 - 20:10ONT-LHR

20h 40m2 stops

06:20 - 22:51LHR-ONT

24h 31m2 stops

£454Delta

Find Deal

Tue, 13 Jan - Tue, 20 Jan

06:00 - 09:00ONT-LHR

19h 00m2 stops

08:40 - 21:05LHR-ONT

20h 25m2 stops

£454Delta

Find Deal

Wed, 21 Jan - Thu, 29 Jan

10:58 - 08:35ONT-LHR

13h 37m1 stop

15:00 - 22:48LHR-ONT

15h 48m1 stop

£455Iberia

Find Deal

Wed, 21 Jan - Tue, 3 Feb

Air Canada flights from Ontario to London Heathrow Airport

Our best Air Canada deals on Ontario to London Heathrow Airport flight tickets

Air Canada

5 Jan

ONT13:40Ontario

56h 50m

2 stops

LHR06:30London Heathrow

20 Jan

LHR13:25London Heathrow

31h 22m

2 stops

ONT12:47Ontario

£494

Find similar

Air Canada

3 Feb

ONT05:05Ontario

17h 25m

2 stops

LHR06:30London Heathrow

28 Feb

LHR13:25London Heathrow

39h 25m

2 stops

ONT20:50Ontario

£508

Find similar

KLM flights from Ontario to London Heathrow Airport

Our best KLM deals on Ontario to London Heathrow Airport flight tickets

KLM

5 May

ONT12:00Ontario

17h 30m

1 stop

LHR13:30London Heathrow

21 May

LHR10:55London Heathrow

19h 14m

1 stop

ONT22:09Ontario

£467

Find similar

KLM

5 May

ONT13:00Ontario

12h 50m

1 stop

LHR09:50London Heathrow

15 May

LHR11:20London Heathrow

13h 56m

1 stop

ONT17:16Ontario

£467

Find similar

KLM

5 Mar

ONT07:30Ontario

19h 00m

1 stop

LHR10:30London Heathrow

12 Mar

LHR12:10London Heathrow

15h 54m

1 stop

ONT21:04Ontario

£493

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Ontario to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 10/3

06:00-06:50

1 stop17h 50m

London Heathrow

Tue 17/3

06:00-22:48

2 stops23h 48m

£433

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 21/1

10:58-08:35

1 stop13h 37m

London Heathrow

Thu 29/1

07:30-22:48

2 stops23h 18m

£434

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 13/1

10:58-08:35

1 stop13h 37m

London Heathrow

Tue 20/1

06:00-18:45

2 stops20h 45m

£439

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 10/3

10:56-06:50

1 stop12h 54m

London Heathrow

Tue 17/3

10:15-18:42

1 stop15h 27m

£445

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 2/2

16:45-13:15

1 stop12h 30m

London Heathrow

Thu 19/2

10:35-18:39

1 stop16h 04m

£448

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 14/1

07:30-10:30

1 stop19h 00m

London Heathrow

Wed 21/1

06:20-21:05

2 stops22h 45m

£450

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Fri 16/1

07:16-10:00

1 stop18h 44m

London Heathrow

Thu 22/1

07:30-22:48

2 stops23h 18m

£453

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 13/1

15:30-20:10

2 stops20h 40m

London Heathrow

Tue 20/1

06:20-22:51

2 stops24h 31m

£454

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 21/1

06:00-09:00

2 stops19h 00m

London Heathrow

Thu 29/1

08:40-21:05

2 stops20h 25m

£454

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 21/1

10:58-08:35

1 stop13h 37m

London Heathrow

Tue 3/2

15:00-22:48

1 stop15h 48m

£455

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 Ontario to London Heathrow Airport

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

What is the cheapest month to fly to London Heathrow Airport?

In general, November is the cheapest month to fly from Ontario to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £485. The month of September is another great option to travel to London Heathrow Airport, with average flight prices from Ontario averaging around £518.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Ontario is on a Monday. momondo users have found tickets for Monday departures for as low as £492. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £608.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Ontario to London Heathrow Airport in the afternoon for as low as £540. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at midday when prices are £661 on average. Flights to London Heathrow Airport from Ontario at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £627 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Ontario for as low as £456 on momondo.

When to book flights from Ontario to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Ontario to London Heathrow Airport (ONT to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to London Heathrow Airport

Fastest flight time	12h 06m
Direct flights	None

The fastest flight from Ontario to London Heathrow Airport takes 12h 06m

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

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How far is Ontario to London Heathrow by plane?
London Heathrow is 5408.1 mi away from Ontario. In terms of flight time, this usually takes a little over 12h 09m.
When did momondo last update prices for flights from Ontario Airport to London Heathrow Airport?
Prices for flights from Ontario Airport to London Heathrow Airport refresh daily.
How old do you have to be to fly from Ontario Airport to London Heathrow Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents you'll need for your trip to London Heathrow 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 London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Eastbourne

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Luton

Gatwick

Maidstone

Slough

Northampton

Swindon

Stratford-upon-Avon

Canterbury

Southend-on-Sea

Ipswich

Ilford

Poole

Guildford

Swanage

Hayes

Dover

Chelmsford

Colchester

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to London . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to London with flexible booking policies on momondo?

Flights from Ontario to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to London?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Ontario.

I’m not ready to book a flight from Ontario to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.