Which airlines fly to London Heathrow Airport?

Virgin Atlantic, British Airways and American Airlines 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 43% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 11 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

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

JetBlue, Alaska Airlines, and United Airlines are the most popular carriers operating from Ontario to London Heathrow

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.

£239 Cheap Flights from Ontario to London Heathrow Airport in 2026/27

Find the cheapest flights from Ontario to London

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One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

06:25 - 10:50ONT Ontario-LHR London Heathrow

20h 25m2 stops Denver Intl Reykjavik Keflavik Intl

20:35 - 23:51LHR London Heathrow-ONT Ontario

35h 16m2 stops Reykjavik Keflavik Intl Denver Intl

£524Multiple Airlines

Thu, 12 Nov - Mon, 16 Nov

06:25 - 19:30ONT Ontario-LHR London Heathrow

29h 05m2 stops Denver Intl Reykjavik Keflavik Intl

12:15 - 23:51LHR London Heathrow-ONT Ontario

19h 36m2 stops Reykjavik Keflavik Intl Denver Intl

£527Multiple Airlines

Thu, 5 Nov - Thu, 12 Nov

06:25 - 10:50ONT Ontario-LHR London Heathrow

20h 25m2 stops Denver Intl Reykjavik Keflavik Intl

12:15 - 09:40LHR London Heathrow-ONT Ontario

29h 25m3 stops Reykjavik Keflavik Intl Denver Intl Las Vegas Harry Reid Intl

£542Multiple Airlines

Wed, 11 Nov - Mon, 16 Nov

06:20 - 10:40ONT Ontario-LHR London Heathrow

21h 20m1 stop Seattle/Tacoma Intl

06:20 - 22:43LHR London Heathrow-ONT Ontario

24h 23m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl

£556Delta

Mon, 26 Oct - Tue, 3 Nov

06:00 - 07:45ONT Ontario-LHR London Heathrow

18h 45m2 stops Salt Lake City Detroit Metropolitan Wayne County

06:20 - 16:23LHR London Heathrow-ONT Ontario

18h 03m2 stops Paris Charles de Gaulle Salt Lake City

£559Delta

Mon, 26 Oct - Tue, 3 Nov

06:25 - 10:50ONT Ontario-LHR London Heathrow

20h 25m2 stops Denver Intl Reykjavik Keflavik Intl

12:15 - 23:51LHR London Heathrow-ONT Ontario

19h 36m2 stops Reykjavik Keflavik Intl Denver Intl

£560Multiple Airlines

Wed, 11 Nov - Mon, 16 Nov

14:13 - 12:20ONT Ontario-LHR London Heathrow

15h 07m1 stop Seattle/Tacoma Intl

14:45 - 23:31LHR London Heathrow-ONT Ontario

16h 46m1 stop Seattle/Tacoma Intl

£561Alaska Airlines

Tue, 27 Oct - Tue, 24 Nov

11:13 - 12:20ONT Ontario-LHR London Heathrow

18h 07m1 stop Seattle/Tacoma Intl

14:45 - 23:31LHR London Heathrow-ONT Ontario

16h 46m1 stop Seattle/Tacoma Intl

£561Alaska Airlines

Tue, 27 Oct - Wed, 25 Nov

12:16 - 09:00ONT Ontario-LHR London Heathrow

13h 44m1 stop Atlanta Hartsfield-Jackson

10:45 - 16:24LHR London Heathrow-ONT Ontario

13h 39m1 stop Salt Lake City

£561KLM

Tue, 27 Oct - Tue, 10 Nov

07:07 - 06:25ONT Ontario-LHR London Heathrow

16h 18m1 stop Atlanta Hartsfield-Jackson

10:50 - 19:30LHR London Heathrow-ONT Ontario

16h 40m1 stop Atlanta Hartsfield-Jackson

£561Delta

Mon, 26 Oct - Tue, 3 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

22:39 - 09:30ONT Ontario-LHR London Heathrow

26h 51m1 stop New York John F Kennedy Intl

11:55 - 22:12LHR London Heathrow-ONT Ontario

18h 17m1 stop New York John F Kennedy Intl

£671JetBlue

Sun, 4 Oct - Tue, 13 Oct

22:39 - 20:45ONT Ontario-LHR London Heathrow

14h 06m1 stop New York John F Kennedy Intl

11:55 - 20:59LHR London Heathrow-ONT Ontario

17h 04m1 stop New York John F Kennedy Intl

£673JetBlue

Sat, 3 Oct - Mon, 5 Oct

22:39 - 20:45ONT Ontario-LHR London Heathrow

14h 06m1 stop New York John F Kennedy Intl

11:55 - 20:59LHR London Heathrow-ONT Ontario

17h 04m1 stop New York John F Kennedy Intl

£674JetBlue

Tue, 29 Sep - Wed, 7 Oct

22:39 - 09:30ONT Ontario-LHR London Heathrow

26h 51m1 stop New York John F Kennedy Intl

08:15 - 20:30LHR London Heathrow-ONT Ontario

20h 15m1 stop New York John F Kennedy Intl

£677JetBlue

Wed, 30 Sep - Tue, 6 Oct

22:39 - 20:45ONT Ontario-LHR London Heathrow

14h 06m1 stop New York John F Kennedy Intl

11:55 - 22:12LHR London Heathrow-ONT Ontario

18h 17m1 stop New York John F Kennedy Intl

£699JetBlue

Sat, 3 Oct - Tue, 13 Oct

22:39 - 20:45ONT Ontario-LHR London Heathrow

14h 06m1 stop New York John F Kennedy Intl

11:55 - 22:12LHR London Heathrow-ONT Ontario

18h 17m1 stop New York John F Kennedy Intl

£699JetBlue

Sat, 3 Oct - Thu, 15 Oct

22:39 - 09:30ONT Ontario-LHR London Heathrow

26h 51m1 stop New York John F Kennedy Intl

08:15 - 20:57LHR London Heathrow-ONT Ontario

20h 42m1 stop New York John F Kennedy Intl

£715JetBlue

Tue, 29 Sep - Fri, 2 Oct

22:39 - 09:30ONT Ontario-LHR London Heathrow

26h 51m1 stop New York John F Kennedy Intl

08:15 - 22:12LHR London Heathrow-ONT Ontario

21h 57m1 stop New York John F Kennedy Intl

£715JetBlue

Sun, 4 Oct - Tue, 13 Oct

22:39 - 20:45ONT Ontario-LHR London Heathrow

14h 06m1 stop New York John F Kennedy Intl

11:55 - 20:57LHR London Heathrow-ONT Ontario

17h 02m1 stop New York John F Kennedy Intl

£730JetBlue

Tue, 29 Sep - Thu, 1 Oct

22:39 - 20:45ONT Ontario-LHR London Heathrow

14h 06m1 stop New York John F Kennedy Intl

08:15 - 20:59LHR London Heathrow-ONT Ontario

20h 44m1 stop New York John F Kennedy Intl

£780JetBlue

Sat, 3 Oct - Wed, 7 Oct

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Delta flights from Ontario to London Heathrow Airport

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

Delta

26 Oct

ONT06:20Ontario

21h 20m

1 stop

LHR10:40London Heathrow

3 Nov

LHR06:20London Heathrow

24h 23m

2 stops

ONT22:43Ontario

£556

Delta

26 Oct

ONT06:00Ontario

18h 45m

2 stops

LHR07:45London Heathrow

3 Nov

LHR06:20London Heathrow

18h 03m

2 stops

ONT16:23Ontario

£559

Delta

26 Oct

ONT07:07Ontario

16h 18m

1 stop

LHR06:25London Heathrow

3 Nov

LHR10:50London Heathrow

16h 40m

1 stop

ONT19:30Ontario

£561

Alaska Airlines flights from Ontario to London Heathrow Airport

Our best Alaska Airlines deals on Ontario to London Heathrow Airport flight tickets

Alaska Airlines

27 Oct

ONT11:13Ontario

18h 07m

1 stop

LHR12:20London Heathrow

25 Nov

LHR14:45London Heathrow

16h 46m

1 stop

ONT23:31Ontario

£561

Alaska Airlines

3 Nov

ONT12:02Ontario

16h 18m

1 stop

LHR12:20London Heathrow

13 Nov

LHR14:45London Heathrow

16h 21m

1 stop

ONT23:06Ontario

£583

Alaska Airlines

1 Feb

ONT07:00Ontario

21h 20m

1 stop

LHR12:20London Heathrow

7 Feb

LHR14:45London Heathrow

27h 53m

1 stop

ONT10:38Ontario

£597

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

Cheapest return flight

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Thu 12/11

06:25-10:50

2 stops20h 25m

London Heathrow

Mon 16/11

20:35-23:51

2 stops35h 16m

£524

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Thu 5/11

06:25-19:30

2 stops29h 05m

London Heathrow

Thu 12/11

12:15-23:51

2 stops19h 36m

£527

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 11/11

06:25-10:50

2 stops20h 25m

London Heathrow

Mon 16/11

12:15-09:40

3 stops29h 25m

£542

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 26/10

06:20-10:40

1 stop21h 20m

London Heathrow

Tue 3/11

06:20-22:43

2 stops24h 23m

£556

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 26/10

06:00-07:45

2 stops18h 45m

London Heathrow

Tue 3/11

06:20-16:23

2 stops18h 03m

£559

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 11/11

06:25-10:50

2 stops20h 25m

London Heathrow

Mon 16/11

12:15-23:51

2 stops19h 36m

£560

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 27/10

14:13-12:20

1 stop15h 07m

London Heathrow

Tue 24/11

14:45-23:31

1 stop16h 46m

£561

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 27/10

11:13-12:20

1 stop18h 07m

London Heathrow

Wed 25/11

14:45-23:31

1 stop16h 46m

£561

Fastest return journey

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 27/10

12:16-09:00

1 stop13h 44m

London Heathrow

Tue 10/11

10:45-16:24

1 stop13h 39m

£561

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 26/10

07:07-06:25

1 stop16h 18m

London Heathrow

Tue 3/11

10:50-19:30

1 stop16h 40m

£561

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 typical price of a round-trip flight between Ontario and London Heathrow Airport?

Prices are currently low for flights on this route.

Typical prices usually range from £643 to £716.
The lowest price recently found on this route was £524.

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 £502. The month of December is another great option to travel to London Heathrow Airport, with average flight prices from Ontario averaging around £561.

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 Tuesday. momondo users have found tickets for Tuesday departures for as low as £728. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Friday is £955.

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 at midday. momondo users have found flights departing from Ontario to London Heathrow Airport at midday for as low as £651. 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 in the afternoon when prices are £850 on average. Flights to London Heathrow Airport from Ontario in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

Best price found	£239
Fastest flight time	12h 00m
Direct flights	None

The best one-way flight to London Heathrow Airport from Ontario in the past 72 hours is £239. The best return flight deal from Ontario to London Heathrow Airport found on momondo in the last 72 hours is £524.

The fastest flight from Ontario to London Heathrow Airport takes 12h 00m

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

Search flight deals

Frequently asked questions about flying from Ontario to London Heathrow Airport

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 00m.
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

Wembley

Gatwick

Milton Keynes

Stratford-upon-Avon

Southend-on-Sea

Luton

Northampton

Slough

Ipswich

Swindon

Maidstone

Folkestone

Hastings

Ilford

Canterbury

Poole

Chichester

Salisbury

Hayes

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.

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Cheap flights from Ontario to London from £239

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to London departing on 19/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Delta flights from Ontario to London Heathrow Airport

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

Alaska Airlines flights from Ontario to London Heathrow Airport

Our best Alaska Airlines deals on Ontario to London Heathrow Airport flight tickets

momondo Fare Finder

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

See travel insights to London from

How to get the cheapest flight ticket from Ontario to London Heathrow Airport

What is the typical price of a round-trip flight between Ontario and London Heathrow Airport?

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

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

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

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

Which airlines fly to London Heathrow Airport?

When to book flights from Ontario to London Heathrow Airport

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

Best price found

Fastest flight time

Direct flights

Frequently asked questions about flying from Ontario to London Heathrow Airport

Travelling to a place near London?

Why use momondo?

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to London

Popular Cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

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