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

According to our current data, Lufthansa (£401), United Airlines (£402), and Finnair (£417) offers the cheapest pricing from London to Ontario. You may be able to fly from London to Ontario for 32% 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 British Airways, which is currently one of the cheapest options available, starting at £435. Lufthansa flights start at £458 while deals on Iberia start at £479 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 21% 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 £506. For sooner than that we have options available in the next 3 days from £712.

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 £392.

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.

£322+ Flights from London to Ontario

The best prices from London to Ontario are usually found in January or April, 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	£401
One-way from	£322
Popular in	August
Cheapest in	January
Average price	£472

Lufthansa
21/4-12/5
3 total stops
44h 32m total
London to Ontario

Search Deals

26/3
2 total stops
32h 49m total
London to Ontario

Search Deals

Highest demand for flights based on searches. 15% potential increase in price (£91 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£25 potential savings vs. average return price).

Search Deals

Average for round-trip flights in January 2025

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 21 January 2025.

Mon 21/407:25LHR - ONT

2 stops21h 17mLufthansa

Mon 12/505:05ONT - LHR

1 stop23h 15mLufthansa

Deal found 20/1£401

Mon 10/308:45LHR - ONT

2 stops34h 59mUnited Airlines

Mon 17/305:05ONT - LHR

1 stop21h 35mUnited Airlines

Deal found 20/1£402

Mon 27/112:30LGW - ONT

2 stops33h 21mAmerican Airlines

Sun 9/206:00ONT - LGW

2 stops41h 30mAmerican Airlines

Deal found 20/1£410

Tue 18/213:50LHR - ONT

1 stop16h 26mFinnair

Mon 24/214:54ONT - LHR

1 stop13h 11mFinnair

Deal found 20/1£417

Tue 18/210:45LHR - ONT

1 stop13h 43mKLM

Wed 26/213:05ONT - LHR

1 stop13h 30mKLM

Deal found 19/1£421

Mon 17/209:20LHR - ONT

1 stop20h 39mMultiple Airlines

Mon 24/206:00ONT - LHR

1 stop17h 30mMultiple Airlines

Deal found 20/1£424

Mon 3/308:40LHR - ONT

2 stops22h 12mDelta

Mon 10/313:30ONT - LHR

1 stop13h 30mDelta

Deal found 20/1£425

Tue 18/210:40LHR - ONT

1 stop15h 55mBritish Airways

Tue 25/216:25ONT - LHR

1 stop12h 55mBritish Airways

Deal found 20/1£433

Tue 9/915:40LHR - ONT

1 stop14h 00mAmerican Airlines

Mon 29/915:00ONT - LHR

1 stop13h 30mAmerican Airlines

Deal found 20/1£443

Thu 20/210:05LHR - ONT

2 stops21h 48mIberia

Wed 26/210:51ONT - LHR

1 stop17h 14mIberia

Deal found 19/1£456

Sun 26/112:00LGW - ONT

1 stop27h 11mMultiple Airlines

Sun 2/208:01ONT - LGW

1 stop18h 34mMultiple Airlines

Deal found 21/1£470

Fri 7/211:00LGW - ONT

2 stops19h 45mIberia

Mon 10/210:56ONT - LGW

2 stops23h 54mIberia

Deal found 20/1£472

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 21 January 2025.

Mon 21/407:25LHR - ONT

2 stops21h 17mLufthansa

Mon 12/505:05ONT - LHR

1 stop23h 15mLufthansa

Deal found 20/1£401

Mon 10/308:45LHR - ONT

2 stops34h 59mUnited Airlines

Mon 17/305:05ONT - LHR

1 stop21h 35mUnited Airlines

Deal found 20/1£402

Tue 18/213:50LHR - ONT

1 stop16h 26mFinnair

Mon 24/214:54ONT - LHR

1 stop13h 11mFinnair

Deal found 20/1£417

Tue 18/210:45LHR - ONT

1 stop13h 43mKLM

Wed 26/213:05ONT - LHR

1 stop13h 30mKLM

Deal found 19/1£421

Mon 17/209:20LHR - ONT

1 stop20h 39mMultiple Airlines

Mon 24/206:00ONT - LHR

1 stop17h 30mMultiple Airlines

Deal found 20/1£424

Tue 18/210:40LHR - ONT

1 stop15h 55mBritish Airways

Tue 25/216:25ONT - LHR

1 stop12h 55mBritish Airways

Deal found 20/1£433

Thu 20/206:20LHR - ONT

2 stops18h 08mAir France

Wed 26/207:05ONT - LHR

1 stop16h 50mAir France

Deal found 19/1£442

Thu 20/210:05LHR - ONT

2 stops21h 48mIberia

Wed 26/210:51ONT - LHR

1 stop17h 14mIberia

Deal found 19/1£456

Thu 20/211:30LHR - ONT

2 stops19h 22mDelta

Wed 26/216:05ONT - LHR

2 stops20h 05mDelta

Deal found 19/1£459

Tue 18/210:40LHR - ONT

1 stop15h 55mAmerican Airlines

Sat 22/222:50ONT - LHR

1 stop24h 10mAmerican Airlines

Deal found 20/1£470

Thu 20/211:10LHR - ONT

2 stops17h 42mAir Canada

Thu 27/205:05ONT - LHR

2 stops17h 25mAir Canada

Deal found 21/1£520

Tue 3/610:55LHR - ONT

1 stop20h 50mVirgin Atlantic

Wed 11/609:55ONT - LHR

1 stop16h 05mVirgin Atlantic

Deal found 21/1£528

Last-minute flights from London to Ontario
Discover last-minute flight deals from London to Ontario. Data last updated 21 January 2025 and is based on user searches.

Sun 26/112:00LGW - ONT

1 stop27h 11mMultiple Airlines

Sun 2/208:01ONT - LGW

1 stop18h 34mMultiple Airlines

Deal found 21/1£470

Sun 26/108:20LHR - ONT

1 stop18h 17mBritish Airways

Sun 2/223:59ONT - LHR

1 stop23h 21mBritish Airways

Deal found 19/1£492

Sun 26/113:50LHR - ONT

1 stop16h 26mIberia

Sat 1/210:56ONT - LHR

1 stop13h 19mIberia

Deal found 20/1£9,356

Mon 27/112:30LGW - ONT

2 stops33h 21mAmerican Airlines

Sun 9/206:00ONT - LGW

2 stops41h 30mAmerican Airlines

Deal found 20/1£410

Mon 27/113:45LHR - ONT

1 stop14h 44mLufthansa

Thu 6/306:00ONT - LHR

1 stop17h 25mLufthansa

Deal found 20/1£416

Mon 27/112:30LHR - ONT

1 stop18h 22mKLM

Mon 17/213:05ONT - LHR

1 stop13h 30mKLM

Deal found 20/1£421

Mon 27/106:30LHR - ONT

2 stops24h 54mMultiple Airlines

Mon 10/206:45ONT - LHR

2 stops19h 15mMultiple Airlines

Deal found 20/1£532

Mon 27/121:15LHR - ONT

1 stop27h 35mChina Airlines

Mon 10/222:45ONT - LHR

1 stop34h 10mChina Airlines

Deal found 20/1£6,727

Fri 31/114:30LHR - ONT

1 stop16h 22mDelta

Fri 7/213:21ONT - LHR

1 stop12h 39mDelta

Deal found 21/1£513

Sat 1/212:45LHR - ONT

1 stop17h 12mLufthansa

Sat 15/206:00ONT - LHR

1 stop17h 30mLufthansa

Deal found 21/1£483

Fri 7/211:00LGW - ONT

2 stops19h 45mIberia

Mon 10/210:56ONT - LGW

2 stops23h 54mIberia

Deal found 20/1£472

Mon 17/206:30LHR - ONT

2 stops22h 22mUnited Airlines

Mon 24/205:05ONT - LHR

1 stop20h 35mUnited Airlines

Deal found 20/1£403

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 21 January 2025.

Wed 26/307:55LGW - ONT

2 stops32h 49mMultiple Airlines

Deal found 19/1£322

Wed 19/210:40LHR - ONT

1 stop15h 55mBritish Airways

Deal found 20/1£435

Wed 19/215:15LHR - ONT

3 stops56h 04mMultiple Airlines

Deal found 20/1£439

Wed 29/110:00LCY - ONT

2 stops19h 57mLufthansa

Deal found 20/1£458

Wed 29/110:05LHR - ONT

1 stop15h 59mLufthansa

Deal found 20/1£464

Mon 17/210:40LHR - ONT

1 stop19h 36mIberia

Deal found 20/1£479

Tue 18/208:20LHR - ONT

1 stop18h 15mFinnair

Deal found 20/1£492

Wed 14/508:15LHR - ONT

1 stop21h 07mJetBlue

Deal found 20/1£662

Tue 13/521:45LGW - ONT

2 stops30h 12mIberia

Deal found 20/1£676

Wed 12/221:40LHR - ONT

2 stops31h 20mAvianca

Deal found 21/1£764

Wed 29/110:45LHR - ONT

1 stop21h 08mVirgin Atlantic

Deal found 21/1£1,026

Sun 26/110:45LHR - ONT

1 stop13h 43mKLM

Deal found 21/1£1,109

Find flights from London to Ontario within your budget

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 21/4

07:25-20:42

2 stops21h 17m

Ontario

Mon 12/5

05:05-12:20

1 stop23h 15m

£401

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 10/3

08:45-12:44

2 stops34h 59m

Ontario

Mon 17/3

05:05-09:40

1 stop21h 35m

£402

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 18/2

13:50-22:16

1 stop16h 26m

Ontario

Mon 24/2

14:54-12:05

1 stop13h 11m

£417

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 18/2

10:45-16:28

1 stop13h 43m

Ontario

Wed 26/2

13:05-10:35

1 stop13h 30m

£421

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 17/2

09:20-21:59

1 stop20h 39m

Ontario

Mon 24/2

06:00-07:30

1 stop17h 30m

£424

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 3/3

08:40-22:52

2 stops22h 12m

Ontario

Mon 10/3

13:30-10:00

1 stop13h 30m

£425

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 18/2

10:40-18:35

1 stop15h 55m

Ontario

Tue 25/2

16:25-13:20

1 stop12h 55m

£433

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 20/2

06:20-16:28

2 stops18h 08m

Ontario

Wed 26/2

07:05-07:55

1 stop16h 50m

£442

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 20/2

10:05-23:53

2 stops21h 48m

Ontario

Wed 26/2

10:51-12:05

1 stop17h 14m

£456

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 18/2

10:40-18:35

1 stop15h 55m

Ontario

Sat 22/2

22:50-07:00

1 stop24h 10m

£470

Flights are sorted by cheapest return flights first.

Deals found on 19/1

Showing 1-10 of 37 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, March is the cheapest month in which you can book a flight from London to Ontario (average of £516). 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 Delta, British Airways and Iberia 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

8,521 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

8,521 reviews

Delta

8.0

Very Good

8,521 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

1,341 reviews

Delta

8.0

Very Good

8,521 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

7.6

Good

1,286 reviews

Delta

8.0

Very Good

8,521 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

665 reviews

Delta

8.0

Very Good

8,521 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

1,490 reviews

Delta

8.0

Very Good

8,521 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, Lufthansa (£401), United Airlines (£402), and Finnair (£417) offers the cheapest pricing from London to Ontario. You may be able to fly from London to Ontario for 32% 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 British Airways, which is currently one of the cheapest options available, starting at £435. Lufthansa flights start at £458 while deals on Iberia start at £479 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, March is the cheapest month in which you can book a flight from London to Ontario (average of £516). 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

Alternative routes for London to Ontario

Heathrow to Los Angeles flights

Heathrow to Las Vegas flights

Heathrow to San Francisco flights

Gatwick to Los Angeles flights

London City to Los Angeles flights

London City to Las Vegas flights

Heathrow to Ontario flights

Gatwick to San Francisco flights

London City to San Francisco flights

Gatwick to Las Vegas flights

Heathrow to Santa Ana flights

Heathrow to Long Beach flights

Heathrow to Burbank flights

Manchester to Las Vegas flights

Heathrow to San Diego flights

Stansted to Los Angeles flights

Heathrow to San Jose flights

Luton to Los Angeles flights

Manchester to Los Angeles flights

Manchester to San Francisco flights

Heathrow to Oakland flights

London City to San Diego flights

Gatwick to San Diego flights

Stansted to Las Vegas flights

Manchester to Ontario flights

Stansted to San Francisco flights

Manchester to Santa Ana flights

Edinburgh to Las Vegas flights

Luton to San Francisco flights

Luton to Las Vegas flights

London City to Oakland flights

Edinburgh to Los Angeles flights

Birmingham to Los Angeles flights

Birmingham to San Francisco flights

London City to Burbank flights

Manchester to San Diego flights

Manchester to San Jose flights

Birmingham to Las Vegas flights

Gatwick to San Jose flights

Gatwick to Burbank flights

Heathrow to Sacramento flights

Gatwick to Santa Ana flights

Heathrow to Reno flights

Gatwick to Oakland flights

Edinburgh to San Francisco flights

Leeds to Las Vegas flights

Newcastle upon Tyne to Las Vegas flights

Manchester to Palm Springs flights

Leeds to Sacramento flights

Gatwick to Sacramento flights

Top 5 airlines flying from London to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£406	Average£558	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£446	Average£707	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£448	Average£535	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Lufthansa	Cheapest£482	Average£571	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£549	Average£793	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.

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 London to Ontario from £322

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 26/3. 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 January or April, 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 21 January 2025.

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 21 January 2025.

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 17 January 2025.

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 21 January 2025.

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 Delta, British Airways and Iberia 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?

100% Free

Book with Flexibility

Travel Smart

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 21 January 2025.