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 £516. Other airlines that can offer you cheap pricing are Virgin Atlantic, from £519, and Delta, from £520. British Airways is currently priced 15% 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 Virgin Atlantic. According to our data, you can fly for as low as £315. Users have also found prices from £321 and £323 on British Airways and KLM, respectively.

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

To save up to 12% on this flight, we recommend booking at least 31 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 £556 1-2 weeks out and tickets from £775 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 £575. Cheapflights users have found deals in the month of April for as cheap as £358. 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.

£207+ Flights from Ontario, California to London Heathrow Airport

Find flights from Ontario to Heathrow within your budget

Fly from

Fly to

Route

Depart

Return

Price

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 19/2

06:05-06:20

1 stop16h 15m

London Heathrow

Wed 26/2

07:25-22:00

2 stops22h 35m

£516

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 19/2

06:00-12:40

1 stop22h 40m

London Heathrow

Wed 26/2

13:15-22:32

1 stop17h 17m

£519

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 4/12

06:00-10:00

1 stop20h 00m

London Heathrow

Thu 12/12

06:30-23:02

2 stops24h 32m

£520

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 9/12

12:11-10:35

1 stop14h 24m

London Heathrow

Fri 17/1

12:30-22:52

1 stop18h 22m

£532

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 4/12

10:43-07:20

1 stop12h 37m

London Heathrow

Fri 14/2

13:50-22:00

1 stop16h 10m

£533

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sat 18/1

12:48-13:20

1 stop16h 32m

London Heathrow

Sun 26/1

10:40-18:37

1 stop15h 57m

£611

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 19/2

06:00-11:15

3 stops21h 15m

London Heathrow

Wed 26/2

09:30-20:40

2 stops19h 10m

£753

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 27/3

13:40-07:10

2 stops34h 30m

London Heathrow

Fri 11/4

14:10-18:00

2 stops35h 50m

£796

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 8/1

07:00-07:55

1 stop16h 55m

London Heathrow

Tue 14/1

06:20-16:28

2 stops18h 08m

£857

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 16/2

00:59-10:50

2 stops25h 51m

£207

Flights are sorted by cheapest return flights first.

Deals found on 19/11

Showing 1-10 of 20 results

Cheap flight deals from Ontario to Heathrow

Round-trip from	£516
One-way from	£207
Popular in	July
Cheapest in	April

British Airways
19/2-26/2
3 total stops
38h 50m total
Ontario to London

Search Deals

16/2
2 total stops
25h 51m total
Ontario to London

Search Deals

High demand for flights, 30% potential price rise

Search Deals

Best time to find cheap flights, 16% potential price drop

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 20 November 2024.

Wed 4/1206:00ONT - LHR

1 stop20h 00mDelta

Thu 12/1206:30LHR - ONT

2 stops24h 32mDelta

Deal found 20/11£520

Sun 8/1207:16ONT - LHR

1 stop16h 04mBritish Airways

Wed 25/1209:25LHR - ONT

1 stop21h 03mBritish Airways

Deal found 19/11£529

Mon 9/1212:11ONT - LHR

1 stop14h 24mKLM

Fri 17/112:30LHR - ONT

1 stop18h 22mKLM

Deal found 19/11£532

Wed 4/1210:43ONT - LHR

1 stop12h 37mIberia

Fri 14/213:50LHR - ONT

1 stop16h 10mIberia

Deal found 19/11£533

Tue 24/1212:55ONT - LHR

2 stops15h 45mVirgin Atlantic

Sun 12/110:45LHR - ONT

1 stop13h 43mVirgin Atlantic

Deal found 20/11£689

Mon 30/1213:57ONT - LHR

1 stop14h 03mUnited Airlines

Tue 14/110:05LHR - ONT

1 stop15h 59mUnited Airlines

Deal found 20/11£793

Thu 28/1112:30ONT - LHR

1 stop14h 05mMultiple Airlines

Sun 29/1210:45LHR - ONT

1 stop21h 43mMultiple Airlines

Deal found 20/11£811

Tue 3/1206:00ONT - LHR

2 stops20h 10mAir Canada

Tue 10/1215:00LHR - ONT

2 stops37h 47mAir Canada

Deal found 19/11£891

Mon 9/1212:11ONT - LHR

2 stops16h 29mAir France

Fri 20/1216:10LHR - ONT

2 stops32h 08mAir France

Deal found 19/11£989

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 20 November 2024.

Wed 19/206:05ONT - LHR

1 stop16h 15mBritish Airways

Wed 26/207:25LHR - ONT

2 stops22h 35mBritish Airways

Deal found 19/11£516

Wed 19/206:00ONT - LHR

1 stop22h 40mVirgin Atlantic

Wed 26/213:15LHR - ONT

1 stop17h 17mVirgin Atlantic

Deal found 19/11£519

Wed 4/1206:00ONT - LHR

1 stop20h 00mDelta

Thu 12/1206:30LHR - ONT

2 stops24h 32mDelta

Deal found 20/11£520

Mon 9/1212:11ONT - LHR

1 stop14h 24mKLM

Fri 17/112:30LHR - ONT

1 stop18h 22mKLM

Deal found 19/11£532

Wed 4/1210:43ONT - LHR

1 stop12h 37mIberia

Fri 14/213:50LHR - ONT

1 stop16h 10mIberia

Deal found 19/11£533

Sat 18/112:48ONT - LHR

1 stop16h 32mMultiple Airlines

Sun 26/110:40LHR - ONT

1 stop15h 57mMultiple Airlines

Deal found 19/11£611

Wed 19/206:00ONT - LHR

3 stops21h 15mUnited Airlines

Wed 26/209:30LHR - ONT

2 stops19h 10mUnited Airlines

Deal found 19/11£753

Thu 27/313:40ONT - LHR

2 stops34h 30mAir Canada

Fri 11/414:10LHR - ONT

2 stops35h 50mAir Canada

Deal found 20/11£796

Wed 8/107:00ONT - LHR

1 stop16h 55mAir France

Tue 14/106:20LHR - ONT

2 stops18h 08mAir France

Deal found 20/11£857

Last-minute flights from Ontario to Heathrow
Discover last-minute flight deals from Ontario to Heathrow. Data last updated 20 November 2024 and is based on user searches.

Mon 25/1107:10ONT - LHR

2 stops16h 45mVirgin Atlantic

Sun 1/1213:05LHR - ONT

2 stops18h 48mVirgin Atlantic

Deal found 19/11£1,457

Mon 25/1122:45ONT - LHR

1 stop34h 10mChina Airlines

Sat 30/1121:15LHR - ONT

1 stop27h 35mChina Airlines

Deal found 20/11£7,744

Tue 26/1110:43ONT - LHR

1 stop12h 37mIberia

Thu 5/1213:50LHR - ONT

1 stop16h 23mIberia

Deal found 19/11£744

Tue 26/1113:18ONT - LHR

1 stop12h 42mDelta

Sun 29/1210:45LHR - ONT

1 stop21h 43mDelta

Deal found 20/11£772

Tue 26/1122:30ONT - LHR

2 stops32h 05mAvianca

Mon 30/1221:40LHR - ONT

2 stops31h 20mAvianca

Deal found 20/11£2,763

Wed 27/1111:53ONT - LHR

1 stop14h 42mKLM

Thu 12/1210:45LHR - ONT

1 stop13h 45mKLM

Deal found 19/11£742

Thu 28/1112:30ONT - LHR

1 stop14h 05mMultiple Airlines

Sun 29/1210:45LHR - ONT

1 stop21h 43mMultiple Airlines

Deal found 20/11£811

Fri 29/1110:43ONT - LHR

1 stop14h 57mBritish Airways

Tue 17/1207:00LHR - ONT

2 stops23h 13mBritish Airways

Deal found 20/11£946

Fri 29/1113:55ONT - LHR

1 stop14h 05mUnited Airlines

Sat 14/1206:30LHR - ONT

2 stops19h 13mUnited Airlines

Deal found 20/11£1,346

Fri 29/1106:00ONT - LHR

2 stops19h 20mAir Canada

Sat 14/1213:00LHR - ONT

2 stops18h 58mAir Canada

Deal found 19/11£1,354

Tue 3/1206:00ONT - LHR

2 stops20h 10mAir Canada

Tue 10/1215:00LHR - ONT

2 stops37h 47mAir Canada

Deal found 19/11£891

Wed 4/1206:00ONT - LHR

1 stop20h 00mDelta

Thu 12/1206:30LHR - ONT

2 stops24h 32mDelta

Deal found 20/11£520

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 20 November 2024.

Sun 16/200:59ONT - LHR

2 stops25h 51mMultiple Airlines

Deal found 19/11£207

Tue 21/113:00ONT - LHR

1 stop14h 40mVirgin Atlantic

Deal found 20/11£315

Tue 29/415:03ONT - LHR

1 stop13h 32mBritish Airways

Deal found 19/11£321

Sun 8/1212:11ONT - LHR

1 stop14h 24mKLM

Deal found 19/11£323

Sun 20/410:58ONT - LHR

1 stop14h 02mIberia

Deal found 20/11£340

Thu 20/206:00ONT - LHR

2 stops22h 50mWestJet

Deal found 19/11£417

Mon 25/1106:00ONT - LHR

2 stops16h 50mDelta

Deal found 20/11£432

Sun 23/206:00ONT - LHR

2 stops19h 40mUnited Airlines

Deal found 19/11£598

Wed 15/105:10ONT - LHR

2 stops22h 40mAir Canada

Deal found 20/11£600

Tue 13/523:30ONT - LHR

2 stops32h 05mAvianca

Deal found 20/11£614

Sat 4/110:46ONT - LHR

2 stops15h 24mAmerican Airlines

Deal found 20/11£730

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 Delta, KLM and Air Canada 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

8,758 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

8,758 reviews

Delta

8.0

Very Good

8,758 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

1,350 reviews

Delta

8.0

Very Good

8,758 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

663 reviews

Delta

8.0

Very Good

8,758 reviews

Check prices

Reviews

1 / 10

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

Air France

7.4

Good

1,525 reviews

Delta

8.0

Very Good

8,758 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

9,172 reviews

Delta

8.0

Very Good

8,758 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 £516. Other airlines that can offer you cheap pricing are Virgin Atlantic, from £519, and Delta, from £520. British Airways is currently priced 15% 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 Virgin Atlantic. According to our data, you can fly for as low as £315. Users have also found prices from £321 and £323 on British Airways and KLM, 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

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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!

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Cheap flights from Ontario to London Heathrow Airport from £207

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 16/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find flights from Ontario to Heathrow within your budget

Cheap flight deals from Ontario to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

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 20 November 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 20 November 2024.

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 15 November 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 20 November 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 Delta, KLM and Air Canada 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?

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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 20 November 2024.