What are the cheapest airlines flying from Ontario to London Heathrow Airport round-trip?

Cheapflights users have booked flights from Ontario to London Heathrow Airport round-trip from £533. Other airlines that can offer you cheap pricing are United Airlines, from £534, and Iberia, from £542. British Airways is currently priced 14% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from Ontario to London Heathrow Airport one-way?

For one-way options, check prices for WestJet. According to our data, you can fly for as low as £262. Users have also found prices from £330 and £333 on KLM and United Airlines, respectively.

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

To save up to 16% on this flight, we recommend booking at least 56 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Ontario to London Heathrow Airport from £563 1-2 weeks out and tickets from £787 for flights departing within the next 72 hours.

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

April can be a great time to fly to London Heathrow Airport from Ontario with a flight ticket averaging about £583. Cheapflights users have found deals in the month of April for as cheap as £359. The most expensive prices can be found in the month of June.

What airport do you fly from for flights from Ontario to London Heathrow?

Most people fly from Ontario (ONT) if they book a flight from Ontario to London Heathrow. On average, Ontario has 0 outbound flights to London Heathrow per day from 0 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

Can I find deals for flights from Ontario to Heathrow that include hotel bookings?

Yes. In addition to deals on Ontario to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Ontario to Heathrow?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Heathrow.

Can I find deals for business class flights from Ontario to Heathrow?

Yes. Cheapflights offers flight deals from Ontario to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£195+ Flights from Ontario to London Heathrow Airport

Cheap flight deals from Ontario to Heathrow

Round-trip from	£533
One-way from	£195
Popular in	July
Cheapest in	April
Average price	£536

British Airways
10/2-18/2
2 total stops
28h 50m total
Ontario to London

Search Deals

17/2
2 total stops
25h 51m total
Ontario to London

Search Deals

High demand for flights, 23% potential price rise

Search Deals

Best time to find cheap flights, 3% potential price drop

Search Deals

Average for round-trip flights in December 2024

Search Deals

Find flight deals from Ontario to Heathrow

Cheapest flights from Ontario to Heathrow
Explore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 december 2024.

tis 31/1213:57ONT - LHR

1 stop14h 03mUnited Airlines

tis 14/114:30LHR - ONT

2 stops38h 21mUnited Airlines

Deal found 17/12£534

mån 30/1213:15ONT - LHR

1 stop12h 45mDelta

tis 14/110:45LHR - ONT

1 stop13h 43mDelta

Deal found 16/12£548

tis 31/1212:55ONT - LHR

1 stop13h 40mKLM

tis 14/110:45LHR - ONT

1 stop13h 43mKLM

Deal found 17/12£621

tis 31/1205:05ONT - LHR

2 stops18h 05mAir Canada

tis 14/111:10LHR - ONT

2 stops17h 41mAir Canada

Deal found 17/12£721

mån 30/1213:57ONT - LHR

1 stop14h 03mLufthansa

lör 11/110:05LHR - ONT

1 stop16h 14mLufthansa

Deal found 18/12£796

tis 24/1210:02ONT - LHR

1 stop19h 18mMultiple Airlines

fre 17/110:40LHR - ONT

1 stop15h 57mMultiple Airlines

Deal found 18/12£809

tis 17/1211:18ONT - LHR

1 stop15h 52mVirgin Atlantic

sön 19/106:30LHR - ONT

2 stops24h 02mVirgin Atlantic

Deal found 17/12£838

tis 24/1206:05ONT - LHR

1 stop22h 00mBritish Airways

ons 15/107:25LHR - ONT

2 stops23h 20mBritish Airways

Deal found 18/12£846

ons 18/1216:25ONT - LHR

1 stop12h 55mAmerican Airlines

sön 19/114:30LHR - ONT

1 stop15h 28mAmerican Airlines

Deal found 18/12£1,036

mån 23/1210:46ONT - LHR

2 stops17h 24mIberia

tors 16/111:25LHR - ONT

2 stops20h 33mIberia

Deal found 18/12£1,061

Best flights from Ontario to Heathrow
Discover carefully curated flight deals from Ontario to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 december 2024.

mån 10/216:25ONT - LHR

1 stop12h 55mBritish Airways

tis 18/210:40LHR - ONT

1 stop15h 55mBritish Airways

Deal found 17/12£533

tis 31/1213:57ONT - LHR

1 stop14h 03mUnited Airlines

tis 14/114:30LHR - ONT

2 stops38h 21mUnited Airlines

Deal found 17/12£534

tis 15/415:03ONT - LHR

1 stop15h 22mIberia

ons 30/411:30LHR - ONT

2 stops20h 12mIberia

Deal found 17/12£542

ons 1/113:05ONT - LHR

1 stop12h 55mDelta

ons 15/106:30LHR - ONT

2 stops24h 22mDelta

Deal found 18/12£545

sön 12/113:00ONT - LHR

1 stop13h 35mKLM

tis 28/112:30LHR - ONT

1 stop18h 22mKLM

Deal found 18/12£548

ons 1/105:05ONT - LHR

1 stop20h 35mLufthansa

ons 15/113:45LHR - ONT

1 stop28h 06mLufthansa

Deal found 17/12£550

ons 23/406:00ONT - LHR

2 stops16h 30mMultiple Airlines

ons 30/408:30LHR - ONT

2 stops19h 47mMultiple Airlines

Deal found 17/12£562

ons 15/107:05ONT - LHR

1 stop16h 50mVirgin Atlantic

mån 27/113:15LHR - ONT

1 stop17h 17mVirgin Atlantic

Deal found 17/12£574

sön 23/305:05ONT - LHR

2 stops19h 05mAir Canada

sön 30/317:40LHR - ONT

2 stops34h 37mAir Canada

Deal found 17/12£581

Last-minute flights from Ontario to Heathrow
Discover last-minute flight deals from Ontario to Heathrow. Data last updated 19 december 2024 and is based on user searches.

ons 18/1216:25ONT - LHR

1 stop12h 55mAmerican Airlines

sön 19/114:30LHR - ONT

1 stop15h 28mAmerican Airlines

Deal found 18/12£1,036

mån 23/1210:46ONT - LHR

2 stops17h 24mIberia

tors 16/111:25LHR - ONT

2 stops20h 33mIberia

Deal found 18/12£1,061

tis 24/1206:05ONT - LHR

1 stop22h 00mBritish Airways

tis 14/109:25LHR - ONT

1 stop17h 12mBritish Airways

Deal found 18/12£809

tis 24/1206:52ONT - LHR

1 stop20h 48mVirgin Atlantic

sön 12/106:20LHR - ONT

2 stops25h 33mVirgin Atlantic

Deal found 18/12£841

tis 24/1206:05ONT - LHR

1 stop22h 00mBritish Airways

ons 15/107:25LHR - ONT

2 stops23h 20mBritish Airways

Deal found 18/12£846

ons 25/1205:30ONT - LHR

2 stops17h 35mDelta

mån 13/114:30LHR - ONT

1 stop16h 22mDelta

Deal found 18/12£852

ons 25/1205:05ONT - LHR

2 stops17h 25mMultiple Airlines

ons 15/113:00LHR - ONT

2 stops28h 51mMultiple Airlines

Deal found 18/12£893

fre 27/1210:39ONT - LHR

1 stop17h 21mUnited Airlines

fre 10/110:00LHR - ONT

2 stops19h 57mUnited Airlines

Deal found 18/12£813

fre 27/1211:56ONT - LHR

1 stop14h 39mKLM

fre 10/115:50LHR - ONT

1 stop14h 42mKLM

Deal found 18/12£858

lör 28/1206:00ONT - LHR

2 stops18h 30mAir Canada

tors 2/118:00LHR - ONT

2 stops26h 40mAir Canada

Deal found 17/12£1,443

tis 31/1213:57ONT - LHR

1 stop14h 03mUnited Airlines

tis 14/114:30LHR - ONT

2 stops38h 21mUnited Airlines

Deal found 17/12£534

tis 31/1205:05ONT - LHR

2 stops18h 05mAir Canada

tis 14/111:10LHR - ONT

2 stops17h 41mAir Canada

Deal found 17/12£721

One-way flights from Ontario to Heathrow
Search for one-way flight options from Ontario to Heathrow. Find affordable one-way fares based on user searches. Data last updated 19 december 2024.

mån 17/200:59ONT - LHR

2 stops25h 51mMultiple Airlines

Deal found 18/12£195

lör 25/106:00ONT - LHR

2 stops22h 50mWestJet

Deal found 17/12£262

ons 15/113:00ONT - LHR

1 stop13h 35mKLM

Deal found 16/12£330

sön 16/205:05ONT - LHR

1 stop20h 35mUnited Airlines

Deal found 17/12£333

sön 27/415:03ONT - LHR

2 stops19h 12mIberia

Deal found 16/12£343

lör 11/116:25ONT - LHR

1 stop12h 55mBritish Airways

Deal found 18/12£380

sön 18/523:30ONT - LHR

2 stops32h 05mAvianca

Deal found 17/12£539

fre 28/313:30ONT - LHR

1 stop13h 30mDelta

Deal found 17/12£668

tis 24/1206:00ONT - LHR

3 stops30h 35mAir Canada

Deal found 17/12£863

Find flights from Ontario to Heathrow within your budget

Fly from

Fly to

Route

Depart

Return

Price

OntarioLondon

ONT - LHR

ONTLHR

Ontario

mån 10/2

16:25-13:20

1 stop12h 55m

London Heathrow

tis 18/2

10:40-18:35

1 stop15h 55m

£533

OntarioLondon

ONT - LHR

ONTLHR

Ontario

tis 31/12

13:57-12:00

1 stop14h 03m

London Heathrow

tis 14/1

14:30-20:51

2 stops38h 21m

£534

OntarioLondon

ONT - LHR

ONTLHR

Ontario

tis 15/4

15:03-14:25

1 stop15h 22m

London Heathrow

ons 30/4

11:30-23:42

2 stops20h 12m

£542

OntarioLondon

ONT - LHR

ONTLHR

Ontario

ons 1/1

13:05-10:00

1 stop12h 55m

London Heathrow

ons 15/1

06:30-22:52

2 stops24h 22m

£545

OntarioLondon

ONT - LHR

ONTLHR

Ontario

sön 12/1

13:00-10:35

1 stop13h 35m

London Heathrow

tis 28/1

12:30-22:52

1 stop18h 22m

£548

OntarioLondon

ONT - LHR

ONTLHR

Ontario

ons 1/1

05:05-09:40

1 stop20h 35m

London Heathrow

ons 15/1

13:45-09:51

1 stop28h 06m

£550

OntarioLondon

ONT - LHR

ONTLHR

Ontario

ons 23/4

06:00-06:30

2 stops16h 30m

London Heathrow

ons 30/4

08:30-20:17

2 stops19h 47m

£562

OntarioLondon

ONT - LHR

ONTLHR

Ontario

ons 15/1

07:05-07:55

1 stop16h 50m

London Heathrow

mån 27/1

13:15-22:32

1 stop17h 17m

£574

OntarioLondon

ONT - LHR

ONTLHR

Ontario

sön 23/3

05:05-07:10

2 stops19h 05m

London Heathrow

sön 30/3

17:40-20:17

2 stops34h 37m

£581

OntarioLondon

ONT - LHR

ONTLHR

Ontario

mån 17/2

00:59-10:50

2 stops25h 51m

£195

Flights are sorted by cheapest return flights first.

Deals found on 18/12

Showing 1-10 of 18 results

Best time to book a flight from Ontario to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ontario with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Ontario to Heathrow

Get recent, data-driven insights about flights from Ontario to Heathrow including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Ontario to London Heathrow Airport?

To ensure you get the cheapest price possible for a flight from Ontario to London Heathrow Airport, you should look to book at least 52 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Ontario to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Ontario to London Heathrow Airport (average of £112). Flying from Ontario to London Heathrow Airport in July is currently the most expensive (average of £160). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to LHR?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to London Heathrow Airport as you normally would.

Rainfall in Heathrow by month

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Heathrow

Read reviews from past customers who have flown Iberia, Virgin Atlantic and British Airways from Ontario to London. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

8,604 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

8,604 reviews

Delta

8.0

Very Good

8,604 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,349 reviews

Delta

8.0

Very Good

8,604 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic

7.5

Good

668 reviews

Delta

8.0

Very Good

8,604 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

9,055 reviews

Delta

8.0

Very Good

8,604 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

WestJet

7.3

Good

2,819 reviews

Delta

8.0

Very Good

8,604 reviews

Check prices

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What airport do you fly from for flights from Ontario to London Heathrow?
Most people fly from Ontario (ONT) if they book a flight from Ontario to London Heathrow. On average, Ontario has 0 outbound flights to London Heathrow per day from 0 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.
What are the cheapest airlines flying from Ontario to London Heathrow Airport round-trip?
Cheapflights users have booked flights from Ontario to London Heathrow Airport round-trip from £533. Other airlines that can offer you cheap pricing are United Airlines, from £534, and Iberia, from £542. British Airways is currently priced 14% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Ontario to London Heathrow Airport one-way?
For one-way options, check prices for WestJet. According to our data, you can fly for as low as £262. Users have also found prices from £330 and £333 on KLM and United Airlines, respectively.
Can I find deals for flights from Ontario to Heathrow that include hotel bookings?
Yes. In addition to deals on Ontario to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Ontario to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Heathrow.
Can I find deals for business class flights from Ontario to Heathrow?
Yes. Cheapflights offers flight deals from Ontario to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Ontario to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from Ontario to London Heathrow Airport (average of £112). Flying from Ontario to London Heathrow Airport in July is currently the most expensive (average of £160). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Fly with Cheapflights

How does Cheapflights help users find flights from Ontario to Heathrow?

When you search for this flight from Ontario to Heathrow, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Heathrow?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ontario to Heathrow.

Can Cheapflights find flights from Ontario to Heathrow with no change fees?

Certainly. Search results for flights to Heathrow from Ontario shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Ontario to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Ontario to London Heathrow Airport from £195

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/2. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ontario to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Heathrow

Cheapest flights from Ontario to HeathrowExplore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 december 2024.

Explore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 december 2024.

Find flights from Ontario to Heathrow within your budget

Best time to book a flight from Ontario to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ontario with our price prediction graph.

Travel insights for flights from Ontario to Heathrow

Get recent, data-driven insights about flights from Ontario to Heathrow including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Ontario to London Heathrow Airport?

Use this chart to determine the optimal time to book a return flight from Ontario to Heathrow. Price data was last updated on 13 December 2024.

What is the cheapest month to book a flight from Ontario to London Heathrow Airport?

What is the cheapest time of day to fly from ONT to LHR?

Find hourly flight availability from Ontario to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 19 december 2024.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

Reviews of airlines servicing Heathrow

Read reviews from past customers who have flown Iberia, Virgin Atlantic and British Airways from Ontario to London. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Ontario to London Heathrow?

What are the cheapest airlines flying from Ontario to London Heathrow Airport round-trip?

What are the cheapest airlines to fly from Ontario to London Heathrow Airport one-way?

Can I find deals for flights from Ontario to Heathrow that include hotel bookings?

How can I find direct flights from Ontario to Heathrow?

Can I find deals for business class flights from Ontario to Heathrow?

What is the cheapest month to book a flight from Ontario to London Heathrow Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to Heathrow?

Why should you use Cheapflights to find cheap flight tickets from Ontario to Heathrow?

Can Cheapflights find flights from Ontario to Heathrow with no change fees?

Can Cheapflights notify me if prices for flights from Ontario to Heathrow become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Ontario to Heathrow
Explore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 december 2024.