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

British Airways, at £533, was found to be the cheapest airline from Ontario to London.Alternate airlines flying return to your destination include United Airlines and Iberia. Users have found that British Airways is 11% cheaper than the other options available to this destination.

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

£262 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on KLM and United Airlines, with prices starting from £330 and £333, respectively.

What are the most popular routes from Ontario to London?

When deciding which route to take from Ontario to London consider Ontario - London Heathrow, Ontario - London Gatwick or Ontario - London City as they are the most popular.

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

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 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?

Flights from Ontario to London lean towards being more expensive in June. Prices are generally better when you fly from Ontario to London in April, with the cheapest ticket starting at £359.

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

Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to London. 0 airlines have flights from Ontario to London on a regular basis. Booking flights from Ontario to London should not be difficult; the airport handles an average of 0 outbound flights to London per day.

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

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

How can I find direct flights from Ontario to London?

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

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

Yes. Cheapflights offers flight deals from Ontario to London 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

Cheap flight deals from Ontario to London

Round-trip from	£533
One-way from	£195
Popular in	June
Cheapest in	January
Average price	£696

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, 16% potential price rise

Search Deals

Best time to find cheap flights, 4% potential price drop

Search Deals

Average for round-trip flights in December 2024

Search Deals

Find flight deals from Ontario to London

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

Tue 31/1213:57ONT - LHR

1 stop14h 03mUnited Airlines

Tue 14/114:30LHR - ONT

2 stops38h 21mUnited Airlines

Deal found 17/12£534

Mon 30/1213:15ONT - LHR

1 stop12h 45mDelta

Tue 14/110:45LHR - ONT

1 stop13h 43mDelta

Deal found 16/12£548

Tue 31/1212:53ONT - LGW

1 stop13h 42mMultiple Airlines

Sun 12/112:00LGW - ONT

1 stop15h 56mMultiple Airlines

Deal found 18/12£555

Tue 31/1212:55ONT - LHR

1 stop13h 40mKLM

Tue 14/110:45LHR - ONT

1 stop13h 43mKLM

Deal found 17/12£621

Tue 31/1205:05ONT - LHR

2 stops18h 05mAir Canada

Tue 14/111:10LHR - ONT

2 stops17h 41mAir Canada

Deal found 17/12£721

Mon 30/1213:57ONT - LHR

1 stop14h 03mLufthansa

Sat 11/110:05LHR - ONT

1 stop16h 14mLufthansa

Deal found 18/12£796

Tue 24/1210:02ONT - LHR

1 stop19h 18mMultiple Airlines

Fri 17/110:40LHR - ONT

1 stop15h 57mMultiple Airlines

Deal found 18/12£809

Tue 24/1206:05ONT - LGW

2 stops17h 25mAmerican Airlines

Sun 12/112:30LGW - ONT

2 stops19h 28mAmerican Airlines

Deal found 18/12£823

Tue 17/1211:18ONT - LHR

1 stop15h 52mVirgin Atlantic

Sun 19/106:30LHR - ONT

2 stops24h 02mVirgin Atlantic

Deal found 17/12£838

Tue 24/1206:05ONT - LHR

1 stop22h 00mBritish Airways

Wed 15/107:25LHR - ONT

2 stops23h 20mBritish Airways

Deal found 18/12£846

Wed 18/1216:25ONT - LHR

1 stop12h 55mAmerican Airlines

Sun 19/114:30LHR - ONT

1 stop15h 28mAmerican Airlines

Deal found 18/12£1,036

Mon 23/1210:46ONT - LHR

2 stops17h 24mIberia

Thu 16/111:25LHR - ONT

2 stops20h 33mIberia

Deal found 18/12£1,061

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

Mon 10/216:25ONT - LHR

1 stop12h 55mBritish Airways

Tue 18/210:40LHR - ONT

1 stop15h 55mBritish Airways

Deal found 17/12£533

Tue 31/1213:57ONT - LHR

1 stop14h 03mUnited Airlines

Tue 14/114:30LHR - ONT

2 stops38h 21mUnited Airlines

Deal found 17/12£534

Tue 15/415:03ONT - LHR

1 stop15h 22mIberia

Wed 30/411:30LHR - ONT

2 stops20h 12mIberia

Deal found 17/12£542

Wed 1/113:05ONT - LHR

1 stop12h 55mDelta

Wed 15/106:30LHR - ONT

2 stops24h 22mDelta

Deal found 18/12£545

Mon 20/121:36ONT - LGW

1 stop28h 59mMultiple Airlines

Sat 25/114:00LGW - ONT

2 stops28h 27mMultiple Airlines

Deal found 18/12£547

Sun 12/113:00ONT - LHR

1 stop13h 35mKLM

Tue 28/112:30LHR - ONT

1 stop18h 22mKLM

Deal found 18/12£548

Wed 1/105:05ONT - LHR

1 stop20h 35mLufthansa

Wed 15/113:45LHR - ONT

1 stop28h 06mLufthansa

Deal found 17/12£550

Wed 15/107:05ONT - LHR

1 stop16h 50mVirgin Atlantic

Mon 27/113:15LHR - ONT

1 stop17h 17mVirgin Atlantic

Deal found 17/12£574

Sun 23/305:05ONT - LHR

2 stops19h 05mAir Canada

Sun 30/317:40LHR - ONT

2 stops34h 37mAir Canada

Deal found 17/12£581

Wed 23/406:00ONT - LHR

2 stops16h 30mMultiple Airlines

Wed 30/408:30LHR - ONT

2 stops19h 47mMultiple Airlines

Deal found 17/12£562

Mon 10/207:00ONT - LGW

2 stops27h 50mIberia

Sun 16/210:55LGW - ONT

2 stops20h 58mIberia

Deal found 17/12£664

Fri 21/306:00ONT - LGW

2 stops29h 50mBritish Airways

Mon 31/310:50LGW - ONT

2 stops21h 01mBritish Airways

Deal found 18/12£955

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

Mon 23/1210:46ONT - LHR

2 stops17h 24mIberia

Thu 16/111:25LHR - ONT

2 stops20h 33mIberia

Deal found 18/12£1,061

Tue 24/1212:53ONT - LGW

1 stop13h 42mMultiple Airlines

Sun 12/112:00LGW - ONT

1 stop15h 56mMultiple Airlines

Deal found 18/12£614

Tue 24/1206:05ONT - LHR

1 stop22h 00mBritish Airways

Tue 14/109:25LHR - ONT

1 stop17h 12mBritish Airways

Deal found 18/12£809

Tue 24/1206:05ONT - LGW

2 stops17h 25mAmerican Airlines

Sun 12/112:30LGW - ONT

2 stops19h 28mAmerican Airlines

Deal found 18/12£823

Tue 24/1206:52ONT - LHR

1 stop20h 48mVirgin Atlantic

Sun 12/106:20LHR - ONT

2 stops25h 33mVirgin Atlantic

Deal found 18/12£841

Wed 25/1205:30ONT - LHR

2 stops17h 35mDelta

Mon 13/114:30LHR - ONT

1 stop16h 22mDelta

Deal found 18/12£852

Wed 25/1205:05ONT - LHR

2 stops17h 25mMultiple Airlines

Wed 15/113:00LHR - ONT

2 stops28h 51mMultiple Airlines

Deal found 18/12£893

Fri 27/1210:39ONT - LHR

1 stop17h 21mUnited Airlines

Fri 10/110:00LHR - ONT

2 stops19h 57mUnited Airlines

Deal found 18/12£813

Fri 27/1211:56ONT - LHR

1 stop14h 39mKLM

Fri 10/115:50LHR - ONT

1 stop14h 42mKLM

Deal found 18/12£858

Fri 27/1210:46ONT - LGW

2 stops24h 04mIberia

Fri 10/111:00LGW - ONT

2 stops19h 45mIberia

Deal found 18/12£2,346

Sat 28/1206:00ONT - LHR

2 stops18h 30mAir Canada

Thu 2/118:00LHR - ONT

2 stops26h 40mAir Canada

Deal found 17/12£1,443

Sun 29/1200:59ONT - LGW

2 stops33h 51mBritish Airways

Mon 13/119:35LGW - ONT

2 stops35h 10mBritish Airways

Deal found 18/12£1,404

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

Mon 17/200:59ONT - LHR

2 stops25h 51mMultiple Airlines

Deal found 18/12£195

Sat 25/106:00ONT - LHR

2 stops22h 50mWestJet

Deal found 17/12£262

Sun 23/210:24ONT - LGW

1 stop16h 11mMultiple Airlines

Deal found 18/12£274

Wed 15/113:00ONT - LHR

1 stop13h 35mKLM

Deal found 16/12£330

Sun 16/205:05ONT - LHR

1 stop20h 35mUnited Airlines

Deal found 17/12£333

Sun 27/415:03ONT - LHR

2 stops19h 12mIberia

Deal found 16/12£343

Sat 11/116:25ONT - LHR

1 stop12h 55mBritish Airways

Deal found 18/12£380

Fri 4/412:53ONT - LGW

2 stops23h 07mIberia

Deal found 17/12£383

Thu 27/311:29ONT - SEN

3 stops19h 16mMultiple Airlines

Deal found 18/12£400

Mon 10/207:00ONT - LGW

2 stops27h 50mBritish Airways

Deal found 18/12£441

Tue 4/306:59ONT - LCY

2 stops19h 51mBritish Airways

Deal found 17/12£480

Sun 18/523:30ONT - LHR

2 stops32h 05mAvianca

Deal found 17/12£539

Find flights from Ontario to London within your budget

Fly from

Fly to

Route

Depart

Return

Price

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 10/2

16:25-13:20

1 stop12h 55m

London Heathrow

Tue 18/2

10:40-18:35

1 stop15h 55m

£533

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 31/12

13:57-12:00

1 stop14h 03m

London Heathrow

Tue 14/1

14:30-20:51

2 stops38h 21m

£534

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 15/4

15:03-14:25

1 stop15h 22m

London Heathrow

Wed 30/4

11:30-23:42

2 stops20h 12m

£542

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 1/1

13:05-10:00

1 stop12h 55m

London Heathrow

Wed 15/1

06:30-22:52

2 stops24h 22m

£545

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Mon 20/1

21:36-10:35

1 stop28h 59m

London Gatwick

Sat 25/1

14:00-10:27

2 stops28h 27m

£547

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 12/1

13:00-10:35

1 stop13h 35m

London Heathrow

Tue 28/1

12:30-22:52

1 stop18h 22m

£548

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 1/1

05:05-09:40

1 stop20h 35m

London Heathrow

Wed 15/1

13:45-09:51

1 stop28h 06m

£550

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 23/4

06:00-06:30

2 stops16h 30m

London Heathrow

Wed 30/4

08:30-20:17

2 stops19h 47m

£562

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 15/1

07:05-07:55

1 stop16h 50m

London Heathrow

Mon 27/1

13:15-22:32

1 stop17h 17m

£574

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 23/3

05:05-07:10

2 stops19h 05m

London Heathrow

Sun 30/3

17:40-20:17

2 stops34h 37m

£581

Flights are sorted by cheapest return flights first.

Deals found on 18/12

Showing 1-10 of 28 results

Best time to book a flight from Ontario to London

Have a flexible travel schedule? Discover the best time to fly to London 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 London

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

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

Booking 72 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Ontario to London (average of £112). Flying from Ontario to London 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 LON?

One of the essential ways to save on airfare from Ontario to London is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at midday could potentially save you up to 18% on airfare.

Rainfall in London by month

In terms of precipitation, rainfall in London 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 when rainfall is around 40.0 mm.

Temperature in London by month

If weather is an important factor for your trip to London, 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 London

Get a feel of what it's like to fly with Iberia, Virgin Atlantic and British Airways from Ontario to London by reading reviews from past customers. You can also see how each airline stacks up 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

9,048 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?
Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to London. 0 airlines have flights from Ontario to London on a regular basis. Booking flights from Ontario to London should not be difficult; the airport handles an average of 0 outbound flights to London per day.
What are the cheapest airlines flying from Ontario to London round-trip?
British Airways, at £533, was found to be the cheapest airline from Ontario to London.Alternate airlines flying return to your destination include United Airlines and Iberia. Users have found that British Airways is 11% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Ontario to London one-way?
£262 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on KLM and United Airlines, with prices starting from £330 and £333, respectively.
What are the most popular routes from Ontario to London?
When deciding which route to take from Ontario to London consider Ontario - London Heathrow, Ontario - London Gatwick or Ontario - London City as they are the most popular.
Can I find deals for flights from Ontario to London that include hotel bookings?
Yes. In addition to deals on Ontario to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Ontario to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to London.
Can I find deals for business class flights from Ontario to London?
Yes. Cheapflights offers flight deals from Ontario to London 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?
Currently, January is the cheapest month in which you can book a flight from Ontario to London (average of £112). Flying from Ontario to London 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 London?

Cheapflights helps you search for flights from Ontario to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario to London for you. Better yet — we are completely free to use.

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

Yes! Cheapflights helps users easily find flights from Ontario to London with no change fees.

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

Yes! Start tracking prices for Ontario to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from Ontario to London 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 London

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to London

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

Find flights from Ontario to London within your budget

Best time to book a flight from Ontario to London

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

Travel insights for flights from Ontario to London

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

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

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

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

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

Find hourly flight availability from Ontario to London. 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 London by month

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

Temperature in London by month

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

Reviews of airlines servicing London

Get a feel of what it's like to fly with Iberia, Virgin Atlantic and British Airways from Ontario to London by reading reviews from past customers. You can also see how each airline stacks up 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 London. 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?

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

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

What are the most popular routes from Ontario to London?

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

How can I find direct flights from Ontario to London?

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

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

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 London

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 London?

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

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

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

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Travel Smart

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