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

£232 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on TAP AIR PORTUGAL and Azores Airlines, with prices starting from £237 and £297, respectively.

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

When deciding which route to take from Region of Ontario to London Heathrow Airport consider Toronto Pearson Intl - London Heathrow, Montreal Pierre Elliott Trudeau Intl - London Heathrow or Toronto Island - London Heathrow as they are the most popular.

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

Looking for the cheapest flight from Region of Ontario to London Heathrow Airport? While on average our users pay £1,012, our data indicates the cheapest price to be £321. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £201.

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

No one likes to see their flight delayed. When booking a flight from Region of Ontario to London Heathrow Airport consider choosing Singapore Airlines (67%), American Airlines (65%) or Aer Lingus (65%) as they are the most reliable in getting you off to your destination on time.

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

Air Canada, Air France and British Airways are the most popular airlines when flying from Region of Ontario to London Heathrow Airport.

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

To save up to 23% on this flight, we recommend booking at least 50 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Region of Ontario to London Heathrow Airport from £509 1-2 weeks out and tickets from £642 for flights departing within the next 72 hours.

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

February can be a great time to fly to London Heathrow Airport from Region of Ontario with a flight ticket averaging about £492. Cheapflights users have found deals in the month of February for as cheap as £301. The most expensive prices can be found in the month of December.

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

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

How can I find direct flights from Ontario to Heathrow?

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

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

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

£215+ Flights from Ontario to London Heathrow Airport

Cheap flight deals from Ontario to Heathrow

Round-trip from	£372
One-way from	£215
Popular in	December
Cheapest in	February
Average price	£407
Good round-trip deal	£429 or less
Good one-way deal	£327 or less

Air Canada
13/4-4/5
3 total stops
23h 05m total
Ontario to London

Search Deals

26/3
1 total stop
15h 35m total
Ontario to London

Search Deals

Highest demand for flights based on searches. 1% potential increase in price (£7 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 February 2025

Search Deals

Price to beat on a round-trip flight from Ontario to London Heathrow.

Search Deals

Price to beat on a one-way flight from Ontario to London Heathrow.

Search Deals

Find flight deals from Ontario to Heathrow

Cheapest flights from Ontario to Heathrow
Explore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.

Sun 13/415:25YTZ - LHR

1 stop10h 05mAir Canada

Sun 4/506:50LHR - YTZ

2 stops13h 00mAir Canada

Deal found 20/2£372

Wed 2/417:40YYZ - LHR

1 stop11h 40mTAP AIR PORTUGAL

Tue 29/418:45LHR - YYZ

1 stop24h 10mTAP AIR PORTUGAL

Deal found 20/2£375

Mon 3/318:10YYZ - LHR

Nonstop7h 20mAir Canada

Thu 13/306:00LHR - YYZ

1 stop13h 35mAir Canada

Deal found 19/2£376

Wed 12/310:20YTZ - LHR

2 stops16h 50mMultiple Airlines

Wed 19/311:10LHR - YTZ

2 stops14h 40mMultiple Airlines

Deal found 19/2£395

Thu 24/418:20YYZ - LHR

Nonstop7h 15mLufthansa

Thu 8/506:55LHR - YYZ

1 stop16h 35mLufthansa

Deal found 20/2£402

Sun 30/316:00YYZ - LHR

1 stop9h 30mMultiple Airlines

Tue 8/415:50LHR - YYZ

Nonstop7h 50mMultiple Airlines

Deal found 20/2£416

Sat 22/319:05YYZ - LHR

1 stop33h 15mAustrian Airlines

Tue 29/409:05LHR - YYZ

1 stop33h 45mAustrian Airlines

Deal found 20/2£448

Fri 28/212:15YYZ - LHR

1 stop13h 25mUnited Airlines

Mon 2/616:40LHR - YYZ

1 stop12h 14mUnited Airlines

Deal found 20/2£454

Sat 15/319:00YYZ - LHR

Nonstop7h 15mBritish Airways

Sat 12/413:20LHR - YYZ

Nonstop7h 40mBritish Airways

Deal found 21/2£457

Sun 11/522:25YUL - LHR

Nonstop6h 35mAir Canada

Wed 21/506:50LHR - YUL

1 stop9h 55mAir Canada

Deal found 20/2£457

Sat 3/522:25YUL - LHR

Nonstop6h 35mMultiple Airlines

Wed 14/506:50LHR - YUL

1 stop9h 55mMultiple Airlines

Deal found 20/2£458

Sun 23/213:20YYZ - LHR

1 stop12h 30mVirgin Atlantic

Mon 3/314:45LHR - YYZ

1 stop11h 40mVirgin Atlantic

Deal found 20/2£459

Best flights from Ontario to Heathrow
Discover carefully curated flight deals from Ontario to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 February 2025.

Sun 13/415:25YTZ - LHR

1 stop10h 05mAir Canada

Sun 4/506:50LHR - YTZ

2 stops13h 00mAir Canada

Deal found 20/2£372

Wed 2/417:40YYZ - LHR

1 stop11h 40mTAP AIR PORTUGAL

Tue 29/418:45LHR - YYZ

1 stop24h 10mTAP AIR PORTUGAL

Deal found 20/2£375

Wed 12/310:20YTZ - LHR

2 stops16h 50mMultiple Airlines

Wed 19/311:10LHR - YTZ

2 stops14h 40mMultiple Airlines

Deal found 19/2£395

Thu 24/418:20YYZ - LHR

Nonstop7h 15mLufthansa

Thu 8/506:55LHR - YYZ

1 stop16h 35mLufthansa

Deal found 20/2£402

Sat 22/319:05YYZ - LHR

1 stop33h 15mAustrian Airlines

Tue 29/409:05LHR - YYZ

1 stop33h 45mAustrian Airlines

Deal found 20/2£448

Fri 25/418:00YYZ - LHR

1 stop10h 20mUnited Airlines

Tue 13/515:20LHR - YYZ

1 stop12h 03mUnited Airlines

Deal found 21/2£455

Sat 15/319:00YYZ - LHR

Nonstop7h 15mBritish Airways

Sat 12/413:20LHR - YYZ

Nonstop7h 40mBritish Airways

Deal found 21/2£457

Fri 25/420:50YYZ - LHR

1 stop10h 05mIcelandair

Sun 27/421:25LHR - YYZ

1 stop26h 45mIcelandair

Deal found 20/2£459

Thu 10/422:30YYZ - LHR

Nonstop7h 10mDelta

Tue 15/417:50LHR - YYZ

Nonstop7h 50mDelta

Deal found 21/2£463

Thu 27/323:05YYZ - LHR

Nonstop7h 10mAmerican Airlines

Sun 30/319:05LHR - YYZ

1 stop19h 45mAmerican Airlines

Deal found 20/2£483

Sun 16/318:20YOW - LHR

1 stop18h 15mAir France

Mon 24/319:35LHR - YOW

1 stop24h 35mAir France

Deal found 21/2£486

Tue 6/518:35YYZ - LHR

1 stop22h 00mBrussels Airlines

Tue 20/506:50LHR - YYZ

2 stops13h 44mBrussels Airlines

Deal found 19/2£487

Direct flights from Ontario to Heathrow
Explore direct flight options from Ontario to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 21 February 2025.

Sun 23/319:10YYZ - LHR

Nonstop7h 20mAir Canada

Tue 1/417:40LHR - YYZ

Nonstop7h 50mAir Canada

Deal found 21/2£394

Wed 12/319:10YYZ - LHR

Nonstop7h 20mLufthansa

Wed 26/318:00LHR - YYZ

Nonstop8h 00mLufthansa

Deal found 21/2£407

Tue 15/418:20YYZ - LHR

Nonstop7h 15mMultiple Airlines

Thu 24/417:40LHR - YYZ

Nonstop7h 50mMultiple Airlines

Deal found 19/2£428

Sat 12/418:25YYZ - LHR

Nonstop7h 10mBritish Airways

Thu 17/413:20LHR - YYZ

Nonstop7h 40mBritish Airways

Deal found 21/2£448

Thu 10/422:30YYZ - LHR

Nonstop7h 10mDelta

Mon 14/417:50LHR - YYZ

Nonstop7h 50mDelta

Deal found 21/2£463

Fri 2/522:25YUL - LHR

Nonstop6h 35mLufthansa

Wed 21/509:30LHR - YUL

Nonstop7h 10mLufthansa

Deal found 20/2£466

Sun 9/320:15YUL - LHR

Nonstop6h 55mAir Canada

Tue 18/315:00LHR - YUL

Nonstop7h 40mAir Canada

Deal found 20/2£503

Sun 20/418:05YYZ - LHR

Nonstop7h 10mAmerican Airlines

Wed 30/413:20LHR - YYZ

Nonstop7h 40mAmerican Airlines

Deal found 20/2£532

Tue 8/422:10YUL - LHR

Nonstop6h 40mBritish Airways

Tue 15/418:05LHR - YUL

Nonstop7h 10mBritish Airways

Deal found 20/2£545

Mon 28/422:10YUL - LHR

Nonstop6h 40mFinnair

Tue 6/518:05LHR - YUL

Nonstop7h 10mFinnair

Deal found 21/2£548

Sun 30/322:20YUL - LHR

Nonstop6h 40mMultiple Airlines

Sat 5/414:05LHR - YUL

Nonstop7h 10mMultiple Airlines

Deal found 20/2£551

Thu 1/518:55YOW - LHR

Nonstop6h 35mLufthansa

Thu 8/514:05LHR - YOW

Nonstop7h 20mLufthansa

Deal found 19/2£568

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

Sun 23/218:10YYZ - LHR

Nonstop7h 20mMultiple Airlines

Mon 3/318:00LHR - YYZ

Nonstop8h 00mMultiple Airlines

Deal found 20/2£415

Sun 23/213:20YYZ - LHR

1 stop12h 30mVirgin Atlantic

Mon 3/314:45LHR - YYZ

1 stop11h 40mVirgin Atlantic

Deal found 20/2£459

Tue 25/218:00YYZ - LHR

1 stop11h 45mDelta

Tue 11/311:45LHR - YYZ

1 stop12h 30mDelta

Deal found 20/2£468

Wed 26/218:35YYZ - LHR

1 stop14h 10mDelta

Tue 11/310:00LHR - YYZ

1 stop14h 15mDelta

Deal found 20/2£464

Wed 26/212:15YUL - LHR

1 stop13h 15mAir Canada

Tue 4/319:25LHR - YUL

1 stop23h 30mAir Canada

Deal found 20/2£503

Wed 26/213:14YYZ - LHR

1 stop14h 01mBritish Airways

Thu 13/306:50LHR - YYZ

2 stops18h 54mBritish Airways

Deal found 20/2£520

Wed 26/218:00YYZ - LHR

2 stops14h 45mAir France

Mon 3/314:45LHR - YYZ

1 stop11h 40mAir France

Deal found 21/2£525

Sat 1/315:00YYZ - LHR

1 stop10h 20mUnited Airlines

Wed 5/316:00LHR - YYZ

1 stop11h 49mUnited Airlines

Deal found 21/2£452

Sat 1/314:00YYZ - LHR

1 stop11h 20mUnited Airlines

Wed 5/315:10LHR - YYZ

1 stop12h 39mUnited Airlines

Deal found 21/2£452

Sun 2/320:10YYZ - LHR

Nonstop7h 20mLufthansa

Wed 12/313:30LHR - YYZ

1 stop11h 25mLufthansa

Deal found 20/2£406

Sun 2/320:10YYZ - LHR

Nonstop7h 20mMultiple Airlines

Sat 8/306:35LHR - YYZ

1 stop13h 20mMultiple Airlines

Deal found 20/2£441

Sun 2/318:00YYZ - LHR

1 stop10h 00mKLM

Sun 9/311:45LHR - YYZ

1 stop12h 30mKLM

Deal found 20/2£468

One-way flights from Ontario to Heathrow
Search for one-way flight options from Ontario to Heathrow. Find affordable one-way fares based on user searches. Data last updated 21 February 2025.

Wed 26/319:20YHM - LHR

1 stop15h 35mMultiple Airlines

Deal found 20/2£215

Sat 15/321:10YYZ - LHR

1 stop35h 40mMultiple Airlines

Deal found 21/2£226

Tue 25/318:05YHM - LHR

1 stop14h 45mWestJet

Deal found 20/2£232

Wed 26/322:45YUL - LHR

1 stop14h 45mTAP AIR PORTUGAL

Deal found 20/2£237

Wed 2/417:40YYZ - LHR

1 stop24h 15mTAP AIR PORTUGAL

Deal found 20/2£238

Mon 12/523:00YUL - LHR

1 stop10h 15mMultiple Airlines

Deal found 20/2£238

Tue 25/306:15YOW - LHR

1 stop26h 35mWestJet

Deal found 20/2£250

Tue 4/309:30YYZ - LHR

2 stops22h 20mWestJet

Deal found 20/2£257

Wed 12/318:10YTZ - LHR

2 stops14h 30mMultiple Airlines

Deal found 20/2£271

Tue 25/316:45YUL - LHR

1 stop16h 05mWestJet

Deal found 20/2£272

Sat 22/318:55YOW - LHR

1 stop37h 55mMultiple Airlines

Deal found 20/2£281

Sun 30/320:45YYZ - LHR

2 stops40h 00mAzores Airlines

Deal found 21/2£297

Find flights from Ontario to Heathrow within your budget

Fly from

Fly to

Route

Depart

Return

Price

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Sun 13/4

10:20-06:30

2 stops15h 10m

London Heathrow

Sun 4/5

06:50-14:50

2 stops13h 00m

£372

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 2/4

17:40-10:20

1 stop11h 40m

London Heathrow

Tue 29/4

18:45-13:55

1 stop24h 10m

£375

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 3/3

18:10-06:30

Nonstop7h 20m

London Heathrow

Thu 13/3

06:00-15:35

1 stop13h 35m

£376

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Wed 12/3

10:20-07:10

2 stops16h 50m

London Heathrow

Wed 19/3

11:10-21:50

2 stops14h 40m

£395

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 24/4

18:20-06:35

Nonstop7h 15m

London Heathrow

Thu 8/5

06:55-18:30

1 stop16h 35m

£402

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 30/3

16:00-06:30

1 stop9h 30m

London Heathrow

Tue 8/4

15:50-18:40

Nonstop7h 50m

£416

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sat 22/3

19:05-08:20

1 stop33h 15m

London Heathrow

Tue 29/4

09:05-13:50

1 stop33h 45m

£448

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Fri 25/4

18:00-09:20

1 stop10h 20m

London Heathrow

Tue 13/5

15:20-22:23

1 stop12h 03m

£455

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sat 15/3

19:00-06:15

Nonstop7h 15m

London Heathrow

Sat 12/4

13:20-16:00

Nonstop7h 40m

£457

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 22/5

22:25-10:00

Nonstop6h 35m

London Heathrow

Wed 28/5

06:50-11:45

1 stop9h 55m

£457

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 60 results

...

Best time to book a flight from Ontario to Heathrow

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

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Ontario to Heathrow

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

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

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of £112). Flying from Region of Ontario to London Heathrow Airport in August is currently the most expensive (average of £163). 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 LHR?

When flying from Region of Ontario to London Heathrow Airport, 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 Heathrow Airport

The most flights from CAON to LHR are scheduled on a Thursday (35 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (25 on average).

Rainfall in Heathrow by month

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

Temperature in Heathrow by month

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

Read through reviews of airlines operating flights from Ontario to London, such as Delta, KLM and Azores Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

8,213 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

8,213 reviews

Delta

8.0

Very Good

8,213 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

1,331 reviews

Delta

8.0

Very Good

8,213 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.

Azores Airlines

7.6

Good

62 reviews

Delta

8.0

Very Good

8,213 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.

Austrian Airlines

7.6

Good

773 reviews

Delta

8.0

Very Good

8,213 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.

SWISS

7.5

Good

1,568 reviews

Delta

8.0

Very Good

8,213 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 Heathrow Airport one-way?
£232 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on TAP AIR PORTUGAL and Azores Airlines, with prices starting from £237 and £297, respectively.
What are the most popular routes from Region of Ontario to London Heathrow Airport?
When deciding which route to take from Region of Ontario to London Heathrow Airport consider Toronto Pearson Intl - London Heathrow, Montreal Pierre Elliott Trudeau Intl - London Heathrow or Toronto Island - London Heathrow as they are the most popular.
What are the most reliable airlines from Region of Ontario to London Heathrow Airport?
No one likes to see their flight delayed. When booking a flight from Region of Ontario to London Heathrow Airport consider choosing Singapore Airlines (67%), American Airlines (65%) or Aer Lingus (65%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Region of Ontario to London Heathrow Airport?
Looking for the cheapest flight from Region of Ontario to London Heathrow Airport? While on average our users pay £1,012, our data indicates the cheapest price to be £321. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £201.
Can I find deals for flights from Ontario to Heathrow that include hotel bookings?
Yes. In addition to deals on Ontario to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Ontario to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Heathrow.
Can I find deals for business class flights from Ontario to Heathrow?
Yes. Cheapflights offers flight deals from Ontario to Heathrow 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 Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of £112). Flying from Region of Ontario to London Heathrow Airport in August is currently the most expensive (average of £163). 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

Deal

Hounslow

Milton Keynes

Croydon

Gatwick

Slough

Luton

Ilford

Hayes

Eastbourne

Swindon

Northampton

Wembley

Southend-on-Sea

Ipswich

Winchester

Maidstone

Crawley

Southall

Watford

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Ontario to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest£261	Average£382	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Air Transat	Cheapest£363	Average£586	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
Aer Lingus	Cheapest£371	Average£457	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Virgin Atlantic	Cheapest£398	Average£482	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Icelandair	Cheapest£398	Average£544	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air Canada	Cheapest£399	Average£812	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
KLM	Cheapest£430	Average£549	FlexibilityNo cancel fee	On-time75%	Search KLM flights
British Airways	Cheapest£432	Average£557	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Lufthansa	Cheapest£443	Average£614	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Air France	Cheapest£545	Average£548	FlexibilityNo cancel fee	On-time77%	Search Air France flights

Fly with Cheapflights

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

Cheapflights makes it easy to find Ontario to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

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

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Heathrow flexibly with Cheapflights today.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from Ontario to London Heathrow Airport from £215

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.

Cheap flight deals from Ontario to Heathrow

Keep the following information in mind while searching for Ontario to Heathrow flight deals. Data was last updated 21 February 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 Heathrow

Cheapest flights from Ontario to HeathrowExplore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.

Explore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.

Find flights from Ontario to Heathrow within your budget

Best time to book a flight from Ontario to Heathrow

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

Travel insights for flights from Ontario to Heathrow

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

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

What is the cheapest time of day to fly from ON to LHR?

Find hourly flight availability from Ontario to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 February 2025.

Weekly flight availability from Region of Ontario to London Heathrow Airport

Explore weekly flight availability from Ontario to Heathrow. 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 21 February 2025.

Rainfall in Heathrow by month

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

Temperature in Heathrow by month

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

Reviews of airlines servicing Heathrow

Read through reviews of airlines operating flights from Ontario to London, such as Delta, KLM and Azores Airlines. Reviews also offer insight into each airline's 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 Heathrow. 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 Heathrow Airport one-way?

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

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

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

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

How can I find direct flights from Ontario to Heathrow?

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

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

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Alternative routes for Ontario to Heathrow

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Top 10 airlines flying from Ontario to Heathrow

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Cheapest flights from Ontario to Heathrow
Explore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.