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

£183 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Porter Airlines and TAP AIR PORTUGAL, with prices starting from £211 and £229, respectively.

What are the most popular routes from Region of Ontario to London?

The most popular route from Region of Ontario to London is Toronto Pearson Intl - London Heathrow. You may also consider Toronto Pearson Intl - London Gatwick or Toronto Pearson Intl - London City.

What are the cheapest flights from Region of Ontario to London?

Looking for the cheapest flight from Region of Ontario to London? While on average our users pay £1,008, our data indicates the cheapest price to be £258. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £340.

What are the most reliable airlines from Region of Ontario to London?

The top 3 most reliable airlines when flying from Region of Ontario to London are Ethiopian Air (88%), Egyptair (78%) and American Airlines (76%).

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

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

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

Find a great deal and save up to 24% by booking at least 50 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Region of Ontario to London within the next two weeks, with the cheapest ticket starting at £466.

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

February can be a great time to fly to London from Region of Ontario with a flight ticket averaging about £467. Cheapflights users have found deals in the month of February for as cheap as £287. The most expensive prices can be found in the month of December.

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.

£143+ Flights from Ontario to London

Cheap flight deals from Ontario to London

Round-trip from	£361
One-way from	£143
Popular in	December
Cheapest in	February
Average price	£420
Good round-trip deal	£405 or less
Good one-way deal	£191 or less

Air Transat
8/5-14/5
Nonstop
15h 00m total
Ontario to London

Search Deals

15/7
1 total stop
20h 10m total
Ontario to London

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (£9 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from Ontario to London (LON).

Search Deals

Price to beat on a one-way flight from Ontario to London (LON).

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 17 April 2025.

Thu 8/522:45YYZ - LGW

Nonstop7h 00mAir Transat

Wed 14/512:40LGW - YYZ

Nonstop8h 00mAir Transat

Deal found 16/4£361

Mon 2/623:00YYZ - LGW

1 stop10h 35mIcelandair

Sat 7/615:40LGW - YYZ

1 stop11h 15mIcelandair

Deal found 16/4£364

Wed 28/522:15YYZ - STN

1 stop16h 45mMultiple Airlines

Mon 2/622:00STN - YYZ

1 stop21h 10mMultiple Airlines

Deal found 16/4£364

Wed 30/417:05YYZ - LHR

1 stop10h 30mAir Canada

Thu 8/508:40LHR - YYZ

1 stop12h 45mAir Canada

Deal found 16/4£365

Sat 17/522:05YUL - LGW

Nonstop6h 45mAir Transat

Sat 31/511:35LGW - YUL

Nonstop7h 40mAir Transat

Deal found 16/4£367

Sat 17/516:40YTZ - LGW

1 stop12h 10mPorter Airlines

Fri 30/511:35LGW - YTZ

1 stop11h 35mPorter Airlines

Deal found 15/4£367

Thu 8/520:50YYZ - LHR

1 stop10h 05mIcelandair

Thu 15/513:05LHR - YYZ

1 stop13h 50mIcelandair

Deal found 15/4£370

Thu 12/622:15YYZ - LTN

1 stop19h 05mMultiple Airlines

Sat 19/707:15LTN - YYZ

1 stop11h 55mMultiple Airlines

Deal found 15/4£378

Fri 16/521:00YTZ - LGW

1 stop31h 50mAir Transat

Tue 27/511:35LGW - YTZ

1 stop15h 45mAir Transat

Deal found 16/4£379

Thu 5/618:05YYZ - LHR

Nonstop7h 10mBritish Airways

Mon 9/613:20LHR - YYZ

Nonstop7h 40mBritish Airways

Deal found 15/4£383

Wed 30/416:20YTZ - LHR

1 stop11h 15mAir Canada

Thu 8/509:30LHR - YTZ

1 stop10h 20mAir Canada

Deal found 16/4£387

Sun 4/515:00YYZ - LHR

1 stop10h 30mMultiple Airlines

Fri 9/508:30LHR - YYZ

Nonstop7h 50mMultiple Airlines

Deal found 16/4£389

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 17 April 2025.

Thu 8/522:45YYZ - LGW

Nonstop7h 00mAir Transat

Wed 14/512:40LGW - YYZ

Nonstop8h 00mAir Transat

Deal found 16/4£361

Mon 2/623:00YYZ - LGW

1 stop10h 35mIcelandair

Thu 12/615:40LGW - YYZ

1 stop11h 15mIcelandair

Deal found 16/4£364

Wed 28/522:15YYZ - STN

1 stop16h 45mMultiple Airlines

Mon 2/622:00STN - YYZ

1 stop21h 10mMultiple Airlines

Deal found 16/4£364

Wed 30/417:05YYZ - LHR

1 stop10h 30mAir Canada

Thu 8/508:40LHR - YYZ

1 stop12h 45mAir Canada

Deal found 16/4£365

Sat 17/516:40YTZ - LGW

1 stop12h 10mPorter Airlines

Fri 30/511:35LGW - YTZ

1 stop11h 35mPorter Airlines

Deal found 15/4£367

Thu 5/618:05YYZ - LHR

Nonstop7h 10mBritish Airways

Mon 9/613:20LHR - YYZ

Nonstop7h 40mBritish Airways

Deal found 15/4£383

Tue 6/515:00YYZ - LHR

1 stop10h 30mLufthansa

Tue 13/508:30LHR - YYZ

Nonstop7h 50mLufthansa

Deal found 16/4£396

Mon 1/922:45YUL - LHR

1 stop18h 15mTAP AIR PORTUGAL

Wed 10/906:00LHR - YUL

1 stop19h 45mTAP AIR PORTUGAL

Deal found 17/4£404

Sat 14/619:30YYZ - LGW

1 stop8h 55mWestJet

Tue 24/610:45LGW - YYZ

1 stop11h 06mWestJet

Deal found 16/4£409

Sun 25/512:59YYZ - LGW

1 stop13h 51mAmerican Airlines

Mon 16/615:05LGW - YYZ

1 stop11h 25mAmerican Airlines

Deal found 16/4£413

Sun 4/512:05YYZ - LHR

2 stops16h 15mUnited Airlines

Wed 14/508:30LHR - YYZ

1 stop13h 12mUnited Airlines

Deal found 15/4£443

Wed 7/520:15YYZ - LCY

1 stop16h 00mSWISS

Thu 15/509:25LCY - YYZ

1 stop12h 00mSWISS

Deal found 16/4£452

Direct flights from Ontario to London
Explore direct flight options from Ontario to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 April 2025.

Thu 8/522:45YYZ - LGW

Nonstop7h 00mAir Transat

Wed 14/512:40LGW - YYZ

Nonstop8h 00mAir Transat

Deal found 16/4£361

Sat 17/522:05YUL - LGW

Nonstop6h 45mAir Transat

Sat 31/511:35LGW - YUL

Nonstop7h 40mAir Transat

Deal found 16/4£367

Mon 22/918:25YYZ - LHR

Nonstop7h 10mLufthansa

Mon 6/1008:30LHR - YYZ

Nonstop7h 55mLufthansa

Deal found 17/4£379

Thu 5/618:05YYZ - LHR

Nonstop7h 10mBritish Airways

Mon 9/613:20LHR - YYZ

Nonstop7h 40mBritish Airways

Deal found 15/4£383

Mon 28/418:20YYZ - LHR

Nonstop7h 15mAir Canada

Sun 4/508:30LHR - YYZ

Nonstop7h 50mAir Canada

Deal found 16/4£384

Fri 6/622:00YUL - LHR

Nonstop6h 40mBritish Airways

Mon 16/618:05LHR - YUL

Nonstop7h 10mBritish Airways

Deal found 15/4£401

Thu 8/522:45YYZ - LGW

Nonstop7h 00mPorter Airlines

Wed 14/512:40LGW - YYZ

Nonstop8h 00mPorter Airlines

Deal found 16/4£403

Thu 12/622:25YUL - LHR

Nonstop6h 35mAir Canada

Thu 19/609:30LHR - YUL

Nonstop7h 10mAir Canada

Deal found 15/4£413

Sat 31/522:05YUL - LGW

Nonstop6h 45mPorter Airlines

Sat 7/611:35LGW - YUL

Nonstop7h 40mPorter Airlines

Deal found 16/4£416

Thu 22/522:25YUL - LHR

Nonstop6h 35mLufthansa

Wed 28/509:30LHR - YUL

Nonstop7h 10mLufthansa

Deal found 16/4£416

Fri 2/522:00YYZ - LHR

Nonstop7h 15mAmerican Airlines

Thu 8/517:20LHR - YYZ

Nonstop7h 55mAmerican Airlines

Deal found 15/4£418

Thu 15/522:05YUL - LHR

Nonstop6h 40mAmerican Airlines

Fri 23/518:05LHR - YUL

Nonstop7h 10mAmerican Airlines

Deal found 16/4£426

Last-minute flights from Ontario to London
Discover last-minute flight deals from Ontario to London. Data last updated 17 April 2025 and is based on user searches.

Mon 21/412:45YYZ - LHR

1 stop13h 10mMultiple Airlines

Mon 28/406:00LHR - YYZ

1 stop15h 20mMultiple Airlines

Deal found 16/4£467

Tue 22/411:15YUL - LHR

1 stop18h 25mMultiple Airlines

Tue 13/506:50LHR - YUL

1 stop9h 55mMultiple Airlines

Deal found 15/4£455

Tue 22/412:55YUL - LHR

2 stops16h 10mAmerican Airlines

Mon 28/415:30LHR - YUL

1 stop25h 14mAmerican Airlines

Deal found 15/4£463

Tue 22/411:15YUL - LHR

1 stop18h 25mAir Canada

Sun 27/409:30LHR - YUL

Nonstop7h 10mAir Canada

Deal found 16/4£483

Tue 22/413:15YUL - LHR

1 stop16h 25mUnited Airlines

Mon 12/509:30LHR - YUL

2 stops15h 15mUnited Airlines

Deal found 15/4£509

Wed 23/415:14YYZ - LHR

1 stop11h 06mBritish Airways

Sat 3/517:15LHR - YYZ

Nonstop7h 55mBritish Airways

Deal found 16/4£429

Wed 23/418:50YUL - LHR

1 stop14h 00mKLM

Mon 12/508:40LHR - YUL

1 stop13h 15mKLM

Deal found 15/4£493

Wed 23/418:50YUL - LCY

1 stop16h 50mKLM

Mon 12/510:00LCY - YUL

1 stop11h 55mKLM

Deal found 15/4£512

Thu 24/414:00YYZ - LHR

1 stop13h 20mAir Canada

Tue 29/417:40LHR - YYZ

Nonstop7h 50mAir Canada

Deal found 15/4£426

Thu 24/414:00YYZ - LHR

1 stop13h 20mUnited Airlines

Tue 29/408:00LHR - YYZ

2 stops19h 13mUnited Airlines

Deal found 15/4£443

Thu 24/407:10YUL - LHR

1 stop20h 45mDelta

Mon 5/509:55LHR - YUL

1 stop12h 00mDelta

Deal found 16/4£492

Sat 26/416:15YYZ - LHR

1 stop13h 05mAmerican Airlines

Thu 1/517:20LHR - YYZ

Nonstop7h 55mAmerican Airlines

Deal found 16/4£428

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 17 April 2025.

Tue 15/721:15YYZ - LTN

1 stop20h 10mMultiple Airlines

Deal found 16/4£143

Tue 15/721:15YYZ - STN

1 stop11h 00mMultiple Airlines

Deal found 16/4£143

Tue 15/721:15YYZ - LGW

1 stop20h 35mMultiple Airlines

Deal found 16/4£156

Tue 15/721:15YYZ - LHR

1 stop19h 25mMultiple Airlines

Deal found 16/4£169

Sat 17/517:35YYZ - LGW

1 stop10h 50mWestJet

Deal found 16/4£183

Tue 27/508:50YTZ - LGW

3 stops19h 35mMultiple Airlines

Deal found 15/4£196

Mon 26/522:15YYZ - LCY

1 stop16h 35mMultiple Airlines

Deal found 16/4£201

Mon 26/518:55YTZ - LGW

1 stop9h 55mPorter Airlines

Deal found 16/4£211

Sun 8/623:00YYZ - LHR

1 stop32h 45mTAP AIR PORTUGAL

Deal found 16/4£229

Wed 7/512:50YTZ - LHR

2 stops26h 30mMultiple Airlines

Deal found 16/4£230

Sun 6/706:45YUL - LGW

1 stop22h 25mMultiple Airlines

Deal found 16/4£234

Thu 1/518:00YYZ - LGW

1 stop10h 50mAir Transat

Deal found 16/4£235

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Thu 8/5

22:45-10:45

Nonstop7h 00m

London Gatwick

Wed 14/5

12:40-15:40

Nonstop8h 00m

£361

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 2/6

23:00-14:35

1 stop10h 35m

London Gatwick

Thu 12/6

15:40-21:55

1 stop11h 15m

£364

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Wed 28/5

22:15-20:00

1 stop16h 45m

London Stansted

Mon 2/6

22:00-14:10

1 stop21h 10m

£364

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 30/4

17:05-08:35

1 stop10h 30m

London Heathrow

Thu 8/5

08:40-16:25

1 stop12h 45m

£365

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Sat 17/5

22:05-09:50

Nonstop6h 45m

London Gatwick

Sat 31/5

11:35-14:15

Nonstop7h 40m

£367

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Sat 17/5

16:40-09:50

1 stop12h 10m

London Gatwick

Fri 30/5

11:35-18:10

1 stop11h 35m

£367

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 8/5

20:50-11:55

1 stop10h 05m

London Heathrow

Thu 15/5

13:05-21:55

1 stop13h 50m

£370

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Thu 12/6

22:15-22:20

1 stop19h 05m

London Luton

Sat 19/7

07:15-14:10

1 stop11h 55m

£378

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Fri 16/5

21:00-09:50

1 stop31h 50m

London Gatwick

Tue 27/5

11:35-22:20

1 stop15h 45m

£379

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 5/6

18:05-06:15

Nonstop7h 10m

London Heathrow

Mon 9/6

13:20-16:00

Nonstop7h 40m

£383

Flights are sorted by cheapest return flights first.

Deals found on 16/4

Showing 1-10 of 60 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.

Cheapflights Insights

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

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

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London (average of £112). Flying from Region of Ontario to London in August is currently the most expensive (average of £164). 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 ON to LON?

When flying from Region of Ontario to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Region of Ontario to London

The most flights from CAON to LON are scheduled on a Tuesday (48 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (36 on average).

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

See what other customers who have flown with Delta, Porter Airlines and KLM from Ontario to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,916 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Delta

8.0

Very Good

7,916 reviews

Delta

8.0

Very Good

7,916 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Porter Airlines

8.0

Very Good

281 reviews

Delta

8.0

Very Good

7,916 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

KLM

7.8

Good

1,326 reviews

Delta

8.0

Very Good

7,916 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Air Transat

7.8

Good

385 reviews

Delta

8.0

Very Good

7,916 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Finnair

7.6

Good

1,269 reviews

Delta

8.0

Very Good

7,916 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Related info for your journey

What are the cheapest airlines to fly from Region of Ontario to London one-way?
£183 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Porter Airlines and TAP AIR PORTUGAL, with prices starting from £211 and £229, respectively.
What are the most popular routes from Region of Ontario to London?
The most popular route from Region of Ontario to London is Toronto Pearson Intl - London Heathrow. You may also consider Toronto Pearson Intl - London Gatwick or Toronto Pearson Intl - London City.
What are the most reliable airlines from Region of Ontario to London?
The top 3 most reliable airlines when flying from Region of Ontario to London are Ethiopian Air (88%), Egyptair (78%) and American Airlines (76%).
What are the cheapest flights from Region of Ontario to London?
Looking for the cheapest flight from Region of Ontario to London? While on average our users pay £1,008, our data indicates the cheapest price to be £258. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £340.
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 Region of Ontario to London?
Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London (average of £112). Flying from Region of Ontario to London in August is currently the most expensive (average of £164). 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

Hounslow

Deal

Milton Keynes

Gatwick

Luton

Slough

Croydon

Eastbourne

Wembley

Hayes

Crawley

Southend-on-Sea

Maidstone

Ipswich

Southall

Ilford

Winchester

Folkestone

Dartford

Watford

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Ontario to London

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest£249	Average£364	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Icelandair	Cheapest£335	Average£500	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air Transat	Cheapest£346	Average£543	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
Aer Lingus	Cheapest£362	Average£459	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Air Canada	Cheapest£378	Average£774	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Porter Airlines	Cheapest£380	Average£557	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
Virgin Atlantic	Cheapest£401	Average£460	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Lufthansa	Cheapest£406	Average£609	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£410	Average£531	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
KLM	Cheapest£410	Average£523	FlexibilityNo cancel fee	On-time75%	Search KLM flights

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from Ontario today with Cheapflights!

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?

Need flexible booking options for your flight to London from Ontario? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Of course! You can now track prices for flights from Ontario to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Cheap flights from Ontario to London from £143

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 15/7. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ontario to London

Keep the following information in mind while searching for Ontario to London flight deals. Data was last updated 17 April 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

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 17 April 2025.

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 17 April 2025.

Cheapflights Fare Finder

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

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.

Cheapflights Insights

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

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

What is the cheapest time of day to fly from ON 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 17 April 2025.

Weekly flight availability from Region of Ontario to London

Explore weekly flight availability from Ontario to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 17 April 2025.

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 insights into the airlines that provide service to London. 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 London. Reviews last updated 17 April 2025.

See what other customers who have flown with Delta, Porter Airlines and KLM from Ontario to London have to say. You can also see how each airline compares 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 are the cheapest airlines to fly from Region of Ontario to London one-way?

What are the most popular routes from Region of Ontario to London?

What are the most reliable airlines from Region of Ontario to London?

What are the cheapest flights from Region of 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 Region of Ontario to London?

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Alternative routes for Ontario to London

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Top 10 airlines flying from Ontario to London

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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 17 April 2025.