How long is the flight from Region of Ontario to London Heathrow Airport?

For as low as £402, Icelandair can have you in London Heathrow Airport from Region of Ontario in 10h 10m. Region of Ontario and London Heathrow Airport are separated by a distance of 3543 mi. Both multi-stop and direct flights can be found to your destination and back.

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

£189 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 Air Canada, with prices starting from £214 and £215, respectively.

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.

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).

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 £600, our data indicates the cheapest price to be £219. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £292.

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 KLM (87%), Air France (87%) or Delta (87%) 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?

American Airlines, Air Canada and Finnair are the most popular airlines when flying from Region of Ontario to London Heathrow Airport.

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.

£174+ Flights from Ontario to London Heathrow Airport

Q: How much does it cost for a return flight from Region of Ontario to London Heathrow Airport?

Airfare is below average for this route at the moment. Region of Ontario to London Heathrow Airport flights typically cost between £416 and £579 in October. The cheapest return flight price found within the last 3 days was £383 on Icelandair (16 Oct-22 Oct).

Cheap flight deals from Ontario to Heathrow

Round-trip from	£383
One-way from	£174
Popular in	December
Cheapest in	February
Average price	£455
Good round-trip deal	£461 or less
Good one-way deal	£313 or less

Icelandair
16/10-22/10
2 total stops
58h 40m total
Ontario to London

Search Deals

23/10
1 total stop
18h 55m total
Ontario to London

Search Deals

Highest demand for flights based on searches. 3% potential increase in price (£14 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£11 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 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 16 September 2025.

Tue 18/1117:35YYZ - LHR

1 stop18h 55mTAP AIR PORTUGAL

Sun 30/1106:00LHR - YYZ

1 stop13h 25mTAP AIR PORTUGAL

Deal found 15/9£384

Thu 13/1119:40YYZ - LHR

1 stop18h 50mIcelandair

Tue 25/1112:15LHR - YYZ

1 stop11h 00mIcelandair

Deal found 16/9£386

Thu 23/1023:00YYZ - LHR

1 stop31h 55mIcelandair

Thu 6/1112:15LHR - YYZ

1 stop11h 00mIcelandair

Deal found 15/9£387

Thu 23/1008:50YTZ - LHR

1 stop16h 40mAir Canada

Thu 6/1106:00LHR - YTZ

2 stops15h 55mAir Canada

Deal found 16/9£388

Sun 9/1119:40YYZ - LHR

1 stop10h 10mIcelandair

Fri 14/1120:35LHR - YYZ

1 stop26h 40mIcelandair

Deal found 15/9£388

Mon 13/1018:20YYZ - LHR

Nonstop7h 15mAir Canada

Thu 23/1006:00LHR - YYZ

1 stop11h 50mAir Canada

Deal found 14/9£389

Thu 23/1018:20YYZ - LHR

Nonstop7h 15mAir Canada

Thu 6/1109:00LHR - YYZ

1 stop12h 10mAir Canada

Deal found 14/9£389

Fri 24/1010:25YTZ - LHR

1 stop15h 05mAir Canada

Sat 1/1106:50LHR - YTZ

2 stops17h 05mAir Canada

Deal found 14/9£390

Wed 12/1106:15YYZ - LHR

1 stop9h 20mAir Canada

Sun 16/1106:00LHR - YYZ

1 stop12h 50mAir Canada

Deal found 14/9£390

Fri 24/1010:25YTZ - LHR

1 stop15h 05mAir Canada

Sun 2/1105:50LHR - YTZ

2 stops13h 05mAir Canada

Deal found 16/9£391

Fri 14/1119:40YYZ - LHR

1 stop10h 10mIcelandair

Wed 26/1112:15LHR - YYZ

1 stop11h 00mIcelandair

Deal found 15/9£391

Tue 30/918:20YYZ - LHR

Nonstop7h 15mAir Canada

Tue 7/1006:50LHR - YYZ

1 stop9h 50mAir Canada

Deal found 14/9£392

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 16 September 2025.

Tue 17/219:40YYZ - LHR

1 stop10h 10mIcelandair

Mon 2/312:15LHR - YYZ

1 stop11h 00mIcelandair

Deal found 15/9£402

Tue 24/210:30YTZ - LHR

1 stop15h 40mAir Canada

Tue 3/313:25LHR - YTZ

1 stop11h 30mAir Canada

Deal found 15/9£422

Wed 15/1015:00YYZ - LHR

1 stop10h 30mLufthansa

Tue 21/1008:30LHR - YYZ

Nonstop7h 55mLufthansa

Deal found 14/9£428

Tue 24/212:10YYZ - LHR

2 stops16h 10mScandinavian Airlines

Tue 3/306:40LHR - YYZ

1 stop14h 00mScandinavian Airlines

Deal found 15/9£445

Thu 6/1110:30YTZ - LHR

2 stops16h 35mMultiple Airlines

Wed 12/1109:00LHR - YTZ

2 stops13h 55mMultiple Airlines

Deal found 14/9£456

Tue 14/1022:15YYZ - LHR

Nonstop7h 15mBritish Airways

Tue 31/317:15LHR - YYZ

Nonstop7h 55mBritish Airways

Deal found 16/9£457

Tue 30/910:05YYZ - LHR

1 stop15h 50mUnited Airlines

Tue 7/1007:45LHR - YYZ

2 stops19h 35mUnited Airlines

Deal found 16/9£458

Tue 24/205:50YHM - LHR

1 stop26h 00mWestJet

Tue 3/314:50LHR - YHM

1 stop31h 26mWestJet

Deal found 15/9£654

Tue 27/119:40YYZ - LHR

1 stop10h 10mIcelandair

Sat 31/112:15LHR - YYZ

1 stop11h 00mIcelandair

Deal found 15/9£402

Mon 29/916:10YTZ - LHR

1 stop9h 20mAir Canada

Wed 15/1009:30LHR - YTZ

1 stop13h 15mAir Canada

Deal found 14/9£422

Tue 30/918:55YUL - LHR

Nonstop6h 35mLufthansa

Sun 30/1111:10LHR - YUL

1 stop12h 10mLufthansa

Deal found 14/9£445

Mon 16/206:00YYZ - LHR

2 stops22h 20mScandinavian Airlines

Sat 28/215:35LHR - YYZ

2 stops29h 05mScandinavian Airlines

Deal found 15/9£449

Wed 29/1009:25YXU - LHR

2 stops17h 45mMultiple Airlines

Wed 5/1107:40LHR - YXU

2 stops18h 41mMultiple Airlines

Deal found 14/9£456

Mon 29/912:00YYZ - LHR

2 stops16h 20mUnited Airlines

Mon 6/1008:00LHR - YYZ

2 stops19h 12mUnited Airlines

Deal found 15/9£465

Tue 14/1015:25YTZ - LHR

1 stop10h 05mAir Canada

Tue 21/1009:30LHR - YTZ

1 stop10h 15mAir Canada

Deal found 15/9£423

Tue 4/1119:44YYZ - LHR

1 stop21h 26mBritish Airways

Sun 16/1117:05LHR - YYZ

Nonstop8h 10mBritish Airways

Deal found 15/9£466

Sat 25/1023:00YYZ - LHR

1 stop31h 50mIcelandair

Sun 9/1120:35LHR - YYZ

1 stop26h 40mIcelandair

Deal found 15/9£450

Sun 28/923:35YYZ - LHR

Nonstop7h 15mLufthansa

Wed 15/1015:50LHR - YYZ

Nonstop7h 55mLufthansa

Deal found 15/9£454

Wed 29/1015:00YUL - LHR

2 stops15h 50mUnited Airlines

Wed 5/1116:20LHR - YUL

2 stops20h 12mUnited Airlines

Deal found 14/9£467

Sun 28/909:15YOW - LHR

1 stop30h 45mMultiple Airlines

Tue 7/1006:00LHR - YOW

2 stops16h 04mMultiple Airlines

Deal found 16/9£469

Sun 12/1022:00YUL - LHR

Nonstop6h 40mBritish Airways

Tue 28/1016:10LHR - YUL

Nonstop7h 35mBritish Airways

Deal found 15/9£475

Thu 16/1016:10YTZ - LHR

1 stop9h 20mAir Canada

Wed 22/1012:40LHR - YTZ

1 stop11h 06mAir Canada

Deal found 15/9£442

Sat 11/1016:00YYZ - LHR

1 stop9h 30mLufthansa

Fri 17/1012:40LHR - YYZ

1 stop10h 45mLufthansa

Deal found 14/9£464

Tue 21/1015:41YUL - LHR

2 stops13h 59mUnited Airlines

Tue 28/1008:00LHR - YUL

2 stops14h 25mUnited Airlines

Deal found 15/9£467

Wed 1/1009:55YXU - LHR

1 stop19h 05mMultiple Airlines

Tue 14/1008:45LHR - YXU

2 stops17h 42mMultiple Airlines

Deal found 15/9£475

Thu 23/1008:50YTZ - LHR

1 stop16h 40mAir Canada

Wed 12/1113:25LHR - YTZ

1 stop11h 30mAir Canada

Deal found 15/9£442

Sat 15/1115:30YUL - LHR

2 stops14h 20mUnited Airlines

Tue 2/1206:50LHR - YUL

2 stops17h 58mUnited Airlines

Deal found 15/9£486

Tue 3/305:50YHM - LHR

1 stop26h 00mWestJet

Sun 15/314:50LHR - YHM

1 stop30h 26mWestJet

Deal found 13/9£656

Sat 22/1110:30YTZ - LHR

1 stop15h 40mAir Canada

Wed 3/1213:25LHR - YTZ

1 stop11h 30mAir Canada

Deal found 15/9£450

Sun 28/1212:59YUL - LHR

1 stop12h 36mMultiple Airlines

Sun 29/309:15LHR - YUL

1 stop18h 30mMultiple Airlines

Deal found 14/9£500

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 16 September 2025.

Tue 30/921:30YYZ - LHR

Nonstop7h 30mAir Canada

Tue 7/1015:50LHR - YYZ

Nonstop7h 55mAir Canada

Deal found 14/9£397

Mon 29/921:30YYZ - LHR

Nonstop7h 30mAir Canada

Mon 6/1008:30LHR - YYZ

Nonstop7h 55mAir Canada

Deal found 15/9£398

Wed 12/1123:00YYZ - LHR

Nonstop7h 20mAir Canada

Sun 16/1111:10LHR - YYZ

Nonstop8h 10mAir Canada

Deal found 14/9£399

Mon 13/1018:20YYZ - LHR

Nonstop7h 15mAir Canada

Fri 24/1008:30LHR - YYZ

Nonstop7h 55mAir Canada

Deal found 15/9£401

Mon 13/1023:35YYZ - LHR

Nonstop7h 15mAir Canada

Thu 23/1008:30LHR - YYZ

Nonstop7h 55mAir Canada

Deal found 14/9£403

Tue 14/1021:30YYZ - LHR

Nonstop7h 30mAir Canada

Tue 31/315:50LHR - YYZ

Nonstop7h 55mAir Canada

Deal found 16/9£412

Wed 12/1123:00YYZ - LHR

Nonstop7h 20mAir Canada

Mon 17/1113:00LHR - YYZ

Nonstop8h 00mAir Canada

Deal found 14/9£414

Mon 29/921:30YYZ - LHR

Nonstop7h 30mAir Canada

Wed 8/1008:30LHR - YYZ

Nonstop7h 55mAir Canada

Deal found 14/9£414

Thu 23/1018:20YYZ - LHR

Nonstop7h 15mAir Canada

Thu 6/1118:00LHR - YYZ

Nonstop8h 10mAir Canada

Deal found 14/9£416

Mon 6/1021:55YUL - LHR

Nonstop6h 40mAir Canada

Tue 14/1009:30LHR - YUL

Nonstop7h 10mAir Canada

Deal found 16/9£417

Wed 29/1020:10YUL - LHR

Nonstop7h 00mAir Canada

Wed 5/1113:25LHR - YUL

Nonstop7h 45mAir Canada

Deal found 14/9£418

Sun 5/1023:35YYZ - LHR

Nonstop7h 15mAir Canada

Mon 13/1008:30LHR - YYZ

Nonstop7h 55mAir Canada

Deal found 15/9£419

Last-minute flights from Ontario to Heathrow
Discover last-minute flight deals from Ontario to Heathrow. Data last updated 16 September 2025 and is based on user searches.

Tue 23/912:25YTZ - LHR

1 stop13h 05mAir Canada

Sat 4/1009:30LHR - YTZ

1 stop12h 15mAir Canada

Deal found 15/9£394

Wed 24/912:25YTZ - LHR

1 stop13h 05mAir Canada

Mon 13/1009:30LHR - YTZ

1 stop10h 15mAir Canada

Deal found 14/9£396

Mon 29/916:00YYZ - LHR

1 stop9h 30mAir Canada

Mon 6/1009:30LHR - YYZ

1 stop12h 24mAir Canada

Deal found 15/9£398

Tue 30/916:00YYZ - LHR

1 stop9h 30mAir Canada

Tue 7/1006:50LHR - YYZ

1 stop9h 50mAir Canada

Deal found 14/9£392

Mon 13/1018:20YYZ - LHR

Nonstop7h 15mAir Canada

Thu 23/1006:00LHR - YYZ

1 stop11h 50mAir Canada

Deal found 14/9£389

Thu 23/1023:00YYZ - LHR

1 stop31h 55mIcelandair

Thu 6/1112:15LHR - YYZ

1 stop11h 00mIcelandair

Deal found 15/9£387

Thu 23/1018:20YYZ - LHR

Nonstop7h 15mAir Canada

Thu 6/1109:00LHR - YYZ

1 stop12h 10mAir Canada

Deal found 14/9£389

Thu 23/1023:00YYZ - LHR

1 stop31h 55mIcelandair

Tue 4/1112:15LHR - YYZ

1 stop11h 00mIcelandair

Deal found 15/9£394

Thu 23/1023:00YYZ - LHR

1 stop31h 55mIcelandair

Mon 3/1120:35LHR - YYZ

1 stop26h 40mIcelandair

Deal found 15/9£395

Thu 23/1023:00YYZ - LHR

1 stop31h 55mIcelandair

Wed 5/1112:15LHR - YYZ

1 stop11h 00mIcelandair

Deal found 14/9£397

Fri 24/1020:50YYZ - LHR

1 stop10h 05mIcelandair

Tue 4/1112:15LHR - YYZ

1 stop11h 00mIcelandair

Deal found 15/9£393

Wed 29/1007:55YUL - LHR

1 stop8h 40mAir Canada

Wed 5/1109:00LHR - YUL

1 stop11h 10mAir Canada

Deal found 14/9£393

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 16 September 2025.

Thu 23/1012:10YHM - LHR

1 stop18h 55mMultiple Airlines

Deal found 16/9£174

Mon 13/1023:00YYZ - LHR

1 stop14h 50mTAP AIR PORTUGAL

Deal found 15/9£181

Wed 8/1020:20YTZ - LHR

2 stops30h 20mMultiple Airlines

Deal found 16/9£182

Mon 27/1014:35YHM - LHR

1 stop18h 15mMultiple Airlines

Deal found 15/9£182

Fri 14/1120:00YYZ - LHR

2 stops35h 50mMultiple Airlines

Deal found 15/9£182

Sun 16/1117:30YYZ - LHR

1 stop14h 10mTAP AIR PORTUGAL

Deal found 16/9£182

Wed 8/1019:55YYZ - LHR

3 stops32h 15mMultiple Airlines

Deal found 16/9£184

Thu 4/1214:10YYZ - LHR

1 stop17h 40mMultiple Airlines

Deal found 15/9£185

Sat 25/1019:15YOW - LHR

1 stop37h 35mWestJet

Deal found 15/9£185

Tue 18/1106:30YYZ - LHR

1 stop25h 20mWestJet

Deal found 14/9£186

Thu 13/1117:35YYZ - LHR

1 stop20h 20mTAP AIR PORTUGAL

Deal found 14/9£187

Mon 24/1114:35YHM - LHR

1 stop17h 15mMultiple Airlines

Deal found 15/9£188

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Tue 17/2

19:40-10:50

1 stop10h 10m

London Heathrow

Mon 2/3

12:15-18:15

1 stop11h 00m

£402

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Tue 27/1

19:40-10:50

1 stop10h 10m

London Heathrow

Sat 31/1

12:15-18:15

1 stop11h 00m

£402

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Tue 24/2

10:30-07:10

1 stop15h 40m

London Heathrow

Tue 3/3

13:25-19:55

1 stop11h 30m

£422

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Mon 29/9

16:10-06:30

1 stop9h 20m

London Heathrow

Wed 15/10

09:30-17:45

1 stop13h 15m

£422

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Tue 14/10

15:25-06:30

1 stop10h 05m

London Heathrow

Tue 21/10

09:30-14:45

1 stop10h 15m

£423

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 15/10

15:00-06:30

1 stop10h 30m

London Heathrow

Tue 21/10

08:30-11:25

Nonstop7h 55m

£428

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Thu 16/10

16:10-06:30

1 stop9h 20m

London Heathrow

Wed 22/10

12:40-18:46

1 stop11h 06m

£442

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Thu 23/10

08:50-06:30

1 stop16h 40m

London Heathrow

Wed 12/11

13:25-19:55

1 stop11h 30m

£442

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Tue 24/2

12:10-09:20

2 stops16h 10m

London Heathrow

Tue 3/3

06:40-15:40

1 stop14h 00m

£445

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 30/9

18:55-06:30

Nonstop6h 35m

London Heathrow

Sun 30/11

11:10-18:20

1 stop12h 10m

£445

Flights are sorted by cheapest return flights first.

Deals found on 15/9

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.

Cheapflights Insights

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

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 £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 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 Friday (46 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (39 on average).

How much does it cost for a return flight from Region of Ontario to London Heathrow Airport?

Related info for your journey

How long is the flight from Region of Ontario to London Heathrow Airport?
For as low as £402, Icelandair can have you in London Heathrow Airport from Region of Ontario in 10h 10m. Region of Ontario and London Heathrow Airport are separated by a distance of 3543 mi. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest airlines to fly from Region of Ontario to London Heathrow Airport one-way?
£189 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 Air Canada, with prices starting from £214 and £215, 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 KLM (87%), Air France (87%) or Delta (87%) 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 £600, our data indicates the cheapest price to be £219. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £292.
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 £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

Milton Keynes

Croydon

Hounslow

Slough

Gatwick

Northampton

Luton

Deal

Wembley

Ilford

Crawley

Hayes

Watford

Winchester

Chichester

Ipswich

Swindon

Dartford

Guildford

Brentford

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
Aer Lingus	Cheapest£361	Average£450	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Icelandair	Cheapest£362	Average£473	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air Canada	Cheapest£372	Average£783	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
KLM	Cheapest£378	Average£510	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Virgin Atlantic	Cheapest£383	Average£511	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Lufthansa	Cheapest£394	Average£611	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£397	Average£522	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£410	Average£452	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£412	Average£412	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
United Airlines	Cheapest£465	Average£566	FlexibilityNo cancel fee	On-time69%	Search United Airlines 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!

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 Ontario to London Heathrow Airport from £174

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 23/10. 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 16 September 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 16 September 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 16 September 2025.

Cheapflights Fare Finder

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

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.

Cheapflights Insights

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

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 16 September 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 16 September 2025.

How much does it cost for a return flight from Region of Ontario to London Heathrow Airport?

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.

How long is the flight from Region of Ontario to London Heathrow Airport?

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?

Travelling to a place near London Heathrow Airport?

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 Ontario to Heathrow

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

Top 10 airlines flying from Ontario to Heathrow

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 Ontario to Heathrow?

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

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

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

100% Free

Book with Flexibility

Travel Smart

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 16 September 2025.