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

According to our current data, American Airlines (£407), Finnair (£414), and Iberia (£416) offers the cheapest pricing from London to Ontario. You may be able to fly from London to Ontario for 28% less than the average price by searching for these airlines.

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

To fly one-way, consider booking your trip with Lufthansa, which is currently one of the cheapest options available, starting at £506. Iberia flights start at £521 while deals on Finnair start at £551 one-way.

What is the cheapest day to fly from London to Ontario?

Travellers seeking maximum savings on their London to Ontario flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular routes from London to Ontario?

The most popular route from London to Ontario is London Heathrow - Ontario. You may also consider London Gatwick - Ontario or London City - Ontario.

What are the most popular airlines that fly from London to Ontario?

When booking a flight from London to Ontario, you may want to consider flying on Finnair, British Airways or Lufthansa as they are the most popular for this route.

What is the cheapest day to fly round-trip from London to Ontario?

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 15% when planning your travel around this day of the week.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 58 days in advance, which can save you up to 17% on flights from London to Ontario compared to booking the week you need them. Waiting 58 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £498. For sooner than that we have options available in the next 3 days from £651.

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

Flights from London to Ontario lean towards being more expensive in August. Prices are generally better when you fly from London to Ontario in February, with the cheapest ticket starting at £379.

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

Most people fly into Ontario (ONT) if they book a flight to Ontario from London. On average, Ontario has 0 inbound flights from London per day from 5 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

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

How can I find direct flights from London to Ontario?

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

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

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

£289+ Flights from London to Ontario

The best prices from London to Ontario are usually found in April or February, booked 58 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from London to Ontario

Round-trip from	£407
One-way from	£289
Popular in	August
Cheapest in	April
Average price	£691

American Airlines
13/1-26/1
4 total stops
55h 37m total
London to Ontario

Search Deals

20/2
1 total stop
16h 35m total
London to Ontario

Search Deals

High demand for flights, 14% potential price rise

Search Deals

Best time to find cheap flights, 5% potential price drop

Search Deals

Average for round-trip flights in December 2024

Search Deals

Find flight deals from London to Ontario

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

Sa 28/1210:45LHR - ONT

1 stop21h 43mVirgin Atlantic

Sa 11/106:00ONT - LHR

1 stop20h 00mVirgin Atlantic

Deal found 18/12£516

Di 31/1210:45LHR - ONT

1 stop19h 52mDelta

Do 15/511:29ONT - LHR

1 stop18h 01mDelta

Deal found 17/12£517

Fr 27/1209:25LHR - ONT

1 stop17h 08mBritish Airways

Fr 17/110:56ONT - LHR

1 stop13h 19mBritish Airways

Deal found 18/12£566

Di 31/1211:35LHR - ONT

2 stops33h 41mUnited Airlines

Do 15/506:02ONT - LHR

2 stops21h 23mUnited Airlines

Deal found 17/12£580

Mo 30/1206:30LHR - ONT

2 stops25h 27mMultiple Airlines

Do 20/206:59ONT - LHR

1 stop15h 21mMultiple Airlines

Deal found 18/12£584

Mo 30/1210:05LHR - ONT

1 stop15h 48mLufthansa

Do 20/206:00ONT - LHR

1 stop20h 50mLufthansa

Deal found 18/12£651

So 29/1208:20LHR - ONT

1 stop22h 08mIberia

Sa 22/214:54ONT - LHR

1 stop13h 10mIberia

Deal found 18/12£671

Do 26/1214:30LHR - ONT

1 stop17h 11mKLM

Sa 25/113:00ONT - LHR

1 stop13h 35mKLM

Deal found 18/12£674

Fr 27/1211:50LHR - ONT

1 stop16h 47mFinnair

Do 16/110:56ONT - LHR

1 stop13h 19mFinnair

Deal found 17/12£734

Di 17/1216:05LHR - ONT

2 stops27h 55mAmerican Airlines

Di 24/1207:15ONT - LHR

1 stop18h 25mAmerican Airlines

Deal found 17/12£846

Do 19/1212:00LGW - ONT

1 stop27h 09mMultiple Airlines

So 22/1209:00ONT - LGW

1 stop17h 35mMultiple Airlines

Deal found 18/12£1,081

Mi 18/1209:00LHR - ONT

3 stops22h 58mAir Canada

Di 24/1206:00ONT - LHR

3 stops30h 35mAir Canada

Deal found 17/12£1,177

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

Mo 13/111:20LGW - ONT

2 stops30h 36mAmerican Airlines

So 26/123:59ONT - LGW

2 stops25h 01mAmerican Airlines

Deal found 18/12£407

Mi 12/213:50LHR - ONT

1 stop16h 55mFinnair

Mi 26/214:54ONT - LHR

1 stop13h 11mFinnair

Deal found 18/12£414

Di 21/118:00LHR - ONT

2 stops27h 51mIberia

Mo 27/112:48ONT - LHR

2 stops25h 22mIberia

Deal found 18/12£416

Di 21/113:15LHR - ONT

1 stop17h 17mVirgin Atlantic

Mo 27/113:00ONT - LHR

1 stop14h 40mVirgin Atlantic

Deal found 18/12£418

Di 4/214:30LHR - ONT

1 stop16h 22mKLM

Do 20/213:00ONT - LHR

1 stop13h 35mKLM

Deal found 18/12£420

Di 18/310:40LHR - ONT

1 stop18h 37mBritish Airways

Di 25/316:30ONT - LHR

1 stop13h 50mBritish Airways

Deal found 18/12£452

Di 21/109:20LCY - ONT

2 stops21h 32mDelta

Mo 27/113:00ONT - LCY

2 stops19h 35mDelta

Deal found 18/12£462

Mi 19/310:05LHR - ONT

1 stop14h 59mUnited Airlines

Mo 31/313:20ONT - LHR

1 stop13h 05mUnited Airlines

Deal found 18/12£465

Di 21/109:30LHR - ONT

2 stops20h 27mMultiple Airlines

Mo 27/110:47ONT - LHR

2 stops38h 33mMultiple Airlines

Deal found 17/12£472

Mo 17/211:35LHR - ONT

1 stop17h 17mLufthansa

So 23/219:40ONT - LHR

1 stop27h 45mLufthansa

Deal found 17/12£493

Di 11/315:00LHR - ONT

2 stops36h 57mAir Canada

Di 1/405:00ONT - LHR

2 stops17h 30mAir Canada

Deal found 17/12£506

Di 21/119:35LGW - ONT

2 stops35h 10mIberia

Mo 27/107:00ONT - LGW

2 stops43h 15mIberia

Deal found 18/12£445

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

Mo 23/1221:40LHR - ONT

2 stops31h 20mAvianca

Do 26/1222:30ONT - LHR

2 stops32h 05mAvianca

Deal found 18/12£3,596

Di 24/1218:00LHR - ONT

2 stops26h 40mAir Canada

Mo 6/106:00ONT - LHR

2 stops21h 50mAir Canada

Deal found 16/12£1,607

Mi 25/1221:15LHR - ONT

1 stop27h 35mChina Airlines

Mi 8/122:45ONT - LHR

1 stop34h 20mChina Airlines

Deal found 17/12£6,691

Do 26/1214:30LHR - ONT

1 stop17h 11mKLM

Sa 25/113:00ONT - LHR

1 stop13h 35mKLM

Deal found 18/12£674

Fr 27/1209:25LHR - ONT

1 stop17h 08mBritish Airways

Fr 17/110:56ONT - LHR

1 stop13h 19mBritish Airways

Deal found 18/12£566

Fr 27/1209:25LHR - ONT

1 stop17h 08mMultiple Airlines

Fr 17/110:56ONT - LHR

1 stop13h 19mMultiple Airlines

Deal found 18/12£655

Fr 27/1211:50LHR - ONT

1 stop16h 47mFinnair

Do 16/110:56ONT - LHR

1 stop13h 19mFinnair

Deal found 17/12£734

Sa 28/1210:45LHR - ONT

1 stop21h 43mVirgin Atlantic

Sa 11/106:00ONT - LHR

1 stop20h 00mVirgin Atlantic

Deal found 18/12£516

Sa 28/1210:05LHR - ONT

1 stop15h 48mLufthansa

Do 16/106:15ONT - LHR

1 stop17h 10mLufthansa

Deal found 17/12£736

Sa 28/1210:05LHR - ONT

1 stop15h 48mUnited Airlines

Do 20/213:00ONT - LHR

1 stop15h 00mUnited Airlines

Deal found 17/12£745

Sa 28/1213:50LHR - ONT

1 stop15h 07mIberia

Sa 18/115:04ONT - LHR

1 stop13h 01mIberia

Deal found 17/12£789

Sa 28/1210:05LHR - ONT

1 stop20h 55mAustrian Airlines

Fr 28/206:00ONT - LHR

1 stop17h 25mAustrian Airlines

Deal found 18/12£590

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

Do 20/212:00LGW - ONT

1 stop16h 35mMultiple Airlines

Deal found 18/12£289

Fr 17/114:50LHR - ONT

2 stops48h 21mMultiple Airlines

Deal found 18/12£338

Mi 12/212:50LHR - ONT

1 stop17h 07mLufthansa

Deal found 17/12£506

Do 16/113:50LHR - ONT

1 stop16h 26mIberia

Deal found 17/12£521

Mo 20/109:25LHR - ONT

1 stop17h 12mFinnair

Deal found 17/12£551

So 26/113:50LHR - ONT

1 stop16h 26mBritish Airways

Deal found 16/12£592

Mo 13/110:00LCY - ONT

2 stops19h 57mLufthansa

Deal found 18/12£644

Fr 24/111:20LGW - ONT

2 stops30h 36mFinnair

Deal found 18/12£649

Fr 17/120:05LCY - ONT

2 stops34h 27mVirgin Atlantic

Deal found 18/12£651

Mi 26/221:40LHR - ONT

2 stops31h 20mAvianca

Deal found 17/12£670

So 4/511:55LHR - ONT

1 stop18h 27mJetBlue

Deal found 18/12£727

Fr 30/507:10LGW - ONT

2 stops24h 25mIberia

Deal found 18/12£1,014

Find flights from London to Ontario within your budget

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Mo 13/1

11:20-09:56

2 stops30h 36m

Ontario

So 26/1

23:59-09:00

2 stops25h 01m

£407

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mi 12/2

13:50-22:45

1 stop16h 55m

Ontario

Mi 26/2

14:54-12:05

1 stop13h 11m

£414

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Di 21/1

18:00-13:51

2 stops27h 51m

Ontario

Mo 27/1

06:00-07:20

1 stop17h 20m

£416

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Di 21/1

13:15-22:32

1 stop17h 17m

Ontario

Mo 27/1

13:00-11:40

1 stop14h 40m

£418

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Di 4/2

14:30-22:52

1 stop16h 22m

Ontario

Do 20/2

13:00-10:35

1 stop13h 35m

£420

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Di 21/1

19:35-22:45

2 stops35h 10m

Ontario

Mo 27/1

07:00-10:15

2 stops43h 15m

£445

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Di 18/3

10:40-22:17

1 stop18h 37m

Ontario

Di 25/3

16:30-13:20

1 stop13h 50m

£452

LondonOntario

LCY - ONT

LCYONT

London City

Di 21/1

09:20-22:52

2 stops21h 32m

Ontario

Mo 27/1

13:00-16:35

2 stops19h 35m

£462

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mi 19/3

12:50-21:59

1 stop16h 09m

Ontario

Mi 26/3

13:40-09:40

1 stop13h 00m

£465

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Di 21/1

09:30-21:57

2 stops20h 27m

Ontario

Mo 27/1

10:47-09:20

2 stops38h 33m

£472

Flights are sorted by cheapest return flights first.

Deals found on 18/12

Showing 1-10 of 31 results

Best time to book a flight from London to Ontario

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

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

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

To ensure you get the cheapest price possible for a flight from London to Ontario, you should look to book at least 58 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 London to Ontario?

Currently, February is the cheapest month in which you can book a flight from London to Ontario (average of £514). Flying from London to Ontario in August is currently the most expensive (average of £827). 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 LON to ONT?

It’s optimal to fly from London to Ontario in the evening. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight at midday.

Rainfall in Ontario by month

In terms of precipitation, rainfall in Ontario ranges from 3.0 - 86.0 inches per month. February is typically the wettest month, when rainfall can reach 86.0 mm. June is typically the driest time to visit Ontario when rainfall is around 3.0 mm.

Temperature in Ontario by month

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 26.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 12.0 C).

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown Lufthansa, Finnair and United Airlines from London to Ontario. In addition to providing an overall rating, users have also rated airlines 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

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very Good

8,604 reviews

Delta

8.0

Very Good

8,604 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,349 reviews

Delta

8.0

Very Good

8,604 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.7

Good

1,285 reviews

Delta

8.0

Very Good

8,604 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic

7.5

Good

668 reviews

Delta

8.0

Very Good

8,604 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France

7.4

Good

1,505 reviews

Delta

8.0

Very Good

8,604 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What airport do you fly into for flights to Ontario from London?
Most people fly into Ontario (ONT) if they book a flight to Ontario from London. On average, Ontario has 0 inbound flights from London per day from 5 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.
What are the cheapest airlines flying from London to Ontario round-trip?
According to our current data, American Airlines (£407), Finnair (£414), and Iberia (£416) offers the cheapest pricing from London to Ontario. You may be able to fly from London to Ontario for 28% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from London to Ontario one-way?
To fly one-way, consider booking your trip with Lufthansa, which is currently one of the cheapest options available, starting at £506. Iberia flights start at £521 while deals on Finnair start at £551 one-way.
What are the most popular routes from London to Ontario?
The most popular route from London to Ontario is London Heathrow - Ontario. You may also consider London Gatwick - Ontario or London City - Ontario.
Can I find deals for flights from London to Ontario that include hotel bookings?
Yes. In addition to deals on London to Ontario flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Ontario.
Can I find deals for business class flights from London to Ontario?
Yes. Cheapflights offers flight deals from London to Ontario 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 London to Ontario?
Currently, February is the cheapest month in which you can book a flight from London to Ontario (average of £514). Flying from London to Ontario in August is currently the most expensive (average of £827). 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

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Top 5 airlines flying from London to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£393	Average£544	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£430	Average£628	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£432	Average£518	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Lufthansa	Cheapest£478	Average£545	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£530	Average£742	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Fly with Cheapflights

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

When you search for this flight from London to Ontario, 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 London to Ontario?

Cheapflights helps you find that perfect flight to Ontario from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from London to Ontario, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights offers price alerts on London to Ontario flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from London to Ontario from £289

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 20/2. Fares are subject to change and may not be available on all flights or dates of travel.

The best prices from London to Ontario are usually found in April or February, booked 58 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from London to Ontario

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from London to Ontario

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

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

Find flights from London to Ontario within your budget

Best time to book a flight from London to Ontario

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

Travel insights for flights from London to Ontario

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

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

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

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

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

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

Rainfall in Ontario by month

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

Temperature in Ontario by month

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

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown Lufthansa, Finnair and United Airlines from London to Ontario. In addition to providing an overall rating, users have also rated airlines 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 London to Ontario. 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 into for flights to Ontario from London?

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

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

What are the most popular routes from London to Ontario?

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

How can I find direct flights from London to Ontario?

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

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

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 London to Ontario

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

Top 5 airlines flying from London to Ontario

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 London to Ontario?

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

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

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

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