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

According to our current data, British Airways (£404), KLM (£420), and United Airlines (£421) offers the cheapest pricing from London to Ontario. You may be able to fly from London to Ontario for 26% 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 £429. Lufthansa flights start at £454 while deals on Iberia start at £456 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 KLM 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 8 days in advance, which can save you up to 23% on flights from London to Ontario compared to booking the week you need them. Waiting 8 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 £444. For sooner than that we have options available in the next 3 days from £675.

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 £353.

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 6 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.

£277+ Flights from London to Ontario - Compare & Save Big

Cheapflights Tip: The best prices from London to Ontario are usually found in February or January, booked 77 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from London to Ontario

Round-trip from	£390
One-way from	£277
Popular in	August
Cheapest in	February
Average price	£542

18/5-24/5
4 total stops
56h 17m total
London to Ontario

Search Deals

13/5
3 total stops
31h 08m total
London to Ontario

Search Deals

Highest demand for flights based on searches. 15% potential increase in price (£76 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£19 potential savings vs. average return price).

Search Deals

Average for round-trip flights in May 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 1 May 2025.

Thu 30/1009:20LHR - ONT

1 stop17h 22mKLM

Thu 20/1111:29ONT - LHR

1 stop15h 31mKLM

Deal found 1/5£388

Sun 18/514:45LGW - ONT

2 stops31h 07mMultiple Airlines

Sat 24/522:40ONT - LGW

2 stops25h 10mMultiple Airlines

Deal found 30/4£390

Thu 8/507:50LHR - ONT

2 stops22h 08mBritish Airways

Thu 22/506:15ONT - LHR

1 stop20h 35mBritish Airways

Deal found 30/4£404

Fri 6/613:25LHR - ONT

1 stop17h 10mVirgin Atlantic

Sun 8/611:25ONT - LHR

2 stops35h 00mVirgin Atlantic

Deal found 30/4£417

Thu 15/513:40LHR - ONT

1 stop16h 20mUnited Airlines

Thu 22/513:36ONT - LHR

1 stop12h 49mUnited Airlines

Deal found 29/4£422

Wed 10/909:15LHR - ONT

2 stops22h 21mIberia

Wed 17/912:49ONT - LHR

1 stop14h 01mIberia

Deal found 30/4£424

Wed 28/509:55LHR - ONT

2 stops20h 40mDelta

Wed 11/607:05ONT - LHR

2 stops17h 45mDelta

Deal found 30/4£427

Thu 11/908:20LHR - ONT

1 stop17h 20mFinnair

Sun 21/912:49ONT - LHR

1 stop14h 01mFinnair

Deal found 30/4£458

Wed 29/1012:05LHR - ONT

1 stop16h 16mLufthansa

Wed 19/1113:00ONT - LHR

1 stop12h 40mLufthansa

Deal found 30/4£477

Fri 6/608:40LCY - ONT

2 stops21h 55mDelta

Sun 8/617:08ONT - LCY

2 stops15h 32mDelta

Deal found 30/4£480

Mon 30/620:40LGW - ONT

2 stops54h 21mIberia

Sun 13/712:46ONT - LGW

2 stops23h 14mIberia

Deal found 30/4£512

Tue 27/508:45LCY - ONT

2 stops22h 00mMultiple Airlines

Tue 3/606:00ONT - LCY

2 stops22h 30mMultiple Airlines

Deal found 29/4£552

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 1 May 2025.

Sun 18/514:45LGW - ONT

2 stops31h 07mMultiple Airlines

Sat 24/522:40ONT - LGW

2 stops25h 10mMultiple Airlines

Deal found 30/4£390

Mon 15/908:20LHR - ONT

1 stop17h 20mBritish Airways

Mon 22/917:09ONT - LHR

1 stop13h 31mBritish Airways

Deal found 30/4£404

Tue 13/510:55LHR - ONT

1 stop13h 22mKLM

Tue 5/813:15ONT - LHR

1 stop12h 35mKLM

Deal found 30/4£420

Wed 14/514:50LHR - ONT

1 stop14h 03mUnited Airlines

Tue 20/515:10ONT - LHR

1 stop15h 00mUnited Airlines

Deal found 29/4£421

Wed 10/909:15LHR - ONT

2 stops22h 21mIberia

Wed 17/912:49ONT - LHR

1 stop14h 01mIberia

Deal found 30/4£424

Wed 28/509:55LHR - ONT

2 stops20h 40mDelta

Wed 11/607:05ONT - LHR

2 stops17h 45mDelta

Deal found 30/4£427

Thu 11/908:20LHR - ONT

1 stop17h 20mFinnair

Sun 21/912:49ONT - LHR

1 stop14h 01mFinnair

Deal found 30/4£458

Mon 11/813:25LHR - ONT

1 stop17h 16mVirgin Atlantic

Tue 30/911:29ONT - LHR

1 stop15h 51mVirgin Atlantic

Deal found 30/4£463

Thu 29/514:50LHR - ONT

1 stop14h 14mLufthansa

Thu 19/613:33ONT - LHR

1 stop12h 07mLufthansa

Deal found 1/5£539

Mon 8/911:20LHR - ONT

1 stop19h 21mAir France

Sun 28/922:59ONT - LHR

1 stop28h 11mAir France

Deal found 30/4£566

Mon 30/609:30LHR - ONT

2 stops39h 55mAir Canada

Sun 13/718:28ONT - LHR

2 stops55h 32mAir Canada

Deal found 30/4£575

Wed 17/911:55LHR - ONT

1 stop17h 46mIcelandair

Sat 20/923:00ONT - LHR

1 stop13h 45mIcelandair

Deal found 30/4£579

Last-minute flights from London to Ontario
Discover last-minute flight deals from London to Ontario. Data last updated 1 May 2025 and is based on user searches.

Tue 6/510:55LHR - ONT

1 stop13h 38mMultiple Airlines

Tue 13/513:10ONT - LHR

1 stop12h 40mMultiple Airlines

Deal found 29/4£9,034

Wed 7/510:35LHR - ONT

1 stop15h 26mUnited Airlines

Sun 25/513:33ONT - LHR

1 stop12h 07mUnited Airlines

Deal found 30/4£490

Thu 8/507:50LHR - ONT

2 stops22h 08mBritish Airways

Thu 22/506:15ONT - LHR

1 stop20h 35mBritish Airways

Deal found 30/4£404

Thu 8/510:55LHR - ONT

1 stop13h 22mKLM

Mon 12/513:10ONT - LHR

1 stop12h 40mKLM

Deal found 30/4£419

Thu 8/509:20LCY - ONT

2 stops21h 15mDelta

Wed 21/513:10ONT - LCY

2 stops19h 30mDelta

Deal found 29/4£577

Thu 8/508:15LHR - ONT

1 stop20h 56mJetBlue

Thu 15/522:59ONT - LHR

1 stop13h 46mJetBlue

Deal found 30/4£710

Thu 8/511:55LHR - ONT

1 stop17h 16mIcelandair

Thu 15/522:59ONT - LHR

1 stop26h 31mIcelandair

Deal found 30/4£724

Thu 8/506:10LHR - ONT

2 stops23h 48mIberia

Thu 22/510:53ONT - LHR

2 stops16h 57mIberia

Deal found 30/4£2,103

Sat 10/515:05LGW - ONT

2 stops35h 18mMultiple Airlines

Mon 26/523:59ONT - LGW

2 stops24h 11mMultiple Airlines

Deal found 29/4£457

Sat 10/513:25LHR - ONT

1 stop17h 10mVirgin Atlantic

Mon 26/513:10ONT - LHR

1 stop12h 40mVirgin Atlantic

Deal found 30/4£472

Sat 10/509:30LHR - ONT

2 stops19h 23mLufthansa

Mon 26/507:00ONT - LHR

3 stops38h 55mLufthansa

Deal found 30/4£713

Sat 10/521:10LHR - ONT

1 stop28h 50mChina Airlines

Sun 25/500:10ONT - LHR

1 stop32h 20mChina Airlines

Deal found 30/4£6,445

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 1 May 2025.

Tue 13/513:00LGW - ONT

3 stops31h 08mMultiple Airlines

Deal found 29/4£277

Tue 13/514:10LHR - ONT

2 stops29h 58mMultiple Airlines

Deal found 29/4£369

Fri 6/615:40LHR - ONT

1 stop13h 58mBritish Airways

Deal found 30/4£429

Fri 29/808:55LCY - ONT

2 stops20h 30mLufthansa

Deal found 30/4£454

Wed 17/910:30LHR - ONT

1 stop19h 26mIberia

Deal found 30/4£456

Fri 29/816:30LHR - ONT

2 stops36h 55mLufthansa

Deal found 30/4£462

Tue 13/510:55LHR - ONT

1 stop13h 22mAir France

Deal found 30/4£501

Wed 14/508:15LHR - ONT

1 stop20h 56mJetBlue

Deal found 30/4£589

Wed 17/910:40LGW - ONT

2 stops20h 56mFinnair

Deal found 29/4£623

Mon 1/911:35LGW - ONT

2 stops19h 54mIberia

Deal found 29/4£634

Tue 9/908:25LHR - ONT

2 stops21h 16mIcelandair

Deal found 30/4£638

Mon 1/907:45LCY - ONT

2 stops22h 44mDelta

Deal found 29/4£647

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Sun 18/5

14:45-13:52

2 stops31h 07m

Ontario

Sat 24/5

22:40-07:50

2 stops25h 10m

£390

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 15/9

08:20-17:40

1 stop17h 20m

Ontario

Mon 22/9

17:09-14:40

1 stop13h 31m

£404

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 13/5

10:55-16:17

1 stop13h 22m

Ontario

Tue 5/8

13:15-09:50

1 stop12h 35m

£420

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 14/5

14:50-20:53

1 stop14h 03m

Ontario

Tue 20/5

15:10-14:10

1 stop15h 00m

£421

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 10/9

09:15-23:36

2 stops22h 21m

Ontario

Wed 17/9

12:49-10:50

1 stop14h 01m

£424

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 28/5

09:55-22:35

2 stops20h 40m

Ontario

Wed 11/6

07:05-08:50

2 stops17h 45m

£427

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 11/9

08:20-17:40

1 stop17h 20m

Ontario

Sun 21/9

12:49-10:50

1 stop14h 01m

£458

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 11/8

13:25-22:41

1 stop17h 16m

Ontario

Tue 30/9

11:29-11:20

1 stop15h 51m

£463

LondonOntario

LCY - ONT

LCYONT

London City

Fri 6/6

08:40-22:35

2 stops21h 55m

Ontario

Sun 8/6

17:08-16:40

2 stops15h 32m

£480

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Mon 30/6

20:40-19:01

2 stops54h 21m

Ontario

Sun 13/7

12:46-20:00

2 stops23h 14m

£512

Flights are sorted by cheapest return flights first.

Deals found on 29/4

Showing 1-10 of 49 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.

Cheapflights Insights

Everything you need to know about your flight from London to Ontario

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 77 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 16% 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, KLM and Finnair 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

7,934 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

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

Delta

8.0

Very Good

7,934 reviews

Delta

8.0

Very Good

7,934 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

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

KLM

7.8

Good

1,334 reviews

Delta

8.0

Very Good

7,934 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

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

Finnair

7.6

Good

1,275 reviews

Delta

8.0

Very Good

7,934 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

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

Air France

7.4

Good

1,446 reviews

Delta

8.0

Very Good

7,934 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

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

United Airlines

7.4

Good

8,696 reviews

Delta

8.0

Very Good

7,934 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

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 6 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, British Airways (£404), KLM (£420), and United Airlines (£421) offers the cheapest pricing from London to Ontario. You may be able to fly from London to Ontario for 26% 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 £429. Lufthansa flights start at £454 while deals on Iberia start at £456 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

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Gatwick to Ontario flights

Top 6 airlines flying from London to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Finnair	Cheapest£370	Average£498	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
KLM	Cheapest£380	Average£582	FlexibilityNo cancel fee	On-time75%	Search KLM flights
United Airlines	Cheapest£397	Average£592	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Atlantic	Cheapest£409	Average£510	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£409	Average£531	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Lufthansa	Cheapest£442	Average£534	FlexibilityNo cancel fee	On-time76%	Search Lufthansa 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 £277

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 13/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London to Ontario are usually found in February or January, booked 77 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 1 May 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 1 May 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Ontario that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from London to Ontario

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 25 April 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 1 May 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

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 1 May 2025.

Read reviews from past customers who have flown Delta, KLM and Finnair 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 6 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 1 May 2025.