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

A quick flight from Region of Ontario to London Heathrow Airport can take about 6h 35m. Lufthansa provides one of the quickest options available for as low as C$ 858. The distance between Region of Ontario and London Heathrow Airport is about 5343 km. This flight may include one or multiple stops.

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

The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as C$ 327. However, be on the lookout for offers from Icelandair and Air Canada, as they are both options that can get you from Region of Ontario to London Heathrow Airport for a low price.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 mm 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?

The most popular flight routes from Region of Ontario to London Heathrow Airport are Toronto Pearson Intl - London Heathrow, Montreal Pierre Elliott Trudeau Intl - London Heathrow and Toronto Island - London Heathrow.

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

On average you can expect to pay C$ 2,396 for a flight from Region of Ontario to London Heathrow Airport. The cheapest flight overall is C$ 588 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 631.

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 (81%), Air France (81%) or Delta (81%) 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?

The most popular airlines flying from Region of Ontario to London Heathrow Airport are Air Canada, British Airways and Lufthansa. Something to consider prior to booking your flight.

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 vacation 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.

C$ 389+ Cheap Flights from Ontario to London Heathrow Airport

Cheap flight deals from Ontario to Heathrow

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 7 September 2026.

Sat 10/102:50 p.m. -

1 stop14h 10m

Mon 12/108:30 a.m. -

2 stops34h 28m

Deal found 3/9C$ 743

Thu 22/105:35 p.m. -

1 stop14h 10m

Sun 8/118:15 a.m. -

1 stop18h 00m

Deal found 2/9C$ 776

Fri 13/117:40 p.m. -

1 stop18h 50m

Fri 20/1112:15 p.m. -

1 stop11h 00m

Deal found 3/9C$ 778

Sun 8/117:40 p.m. -

1 stop10h 10m

Mon 23/1112:15 p.m. -

1 stop11h 00m

Deal found 2/9C$ 779

Sun 8/117:40 p.m. -

1 stop10h 10m

Sun 22/118:35 p.m. -

1 stop26h 40m

Deal found 2/9C$ 780

Sun 8/117:40 p.m. -

1 stop10h 10m

Mon 16/118:35 p.m. -

1 stop26h 40m

Deal found 5/9C$ 783

Sun 8/117:40 p.m. -

1 stop10h 10m

Fri 13/118:35 p.m. -

1 stop26h 40m

Deal found 4/9C$ 784

Fri 23/108:45 p.m. -

1 stop10h 10m

Sun 1/1112:15 p.m. -

1 stop11h 00m

Deal found 5/9C$ 787

Wed 4/1110:45 p.m. -

1 stop11h 45m

Sun 8/118:15 a.m. -

1 stop18h 00m

Deal found 3/9C$ 789

Thu 15/1011:10 p.m. -

1 stop16h 10m

Mon 19/109:25 p.m. -

1 stop26h 45m

Deal found 2/9C$ 791

Fri 4/127:40 p.m. -

2 stops14h 55m

Fri 11/128:50 a.m. -

2 stops14h 25m

Deal found 5/9C$ 793

Wed 18/119:45 p.m. -

1 stop12h 45m

Fri 27/118:15 a.m. -

1 stop16h 40m

Deal found 6/9C$ 796

Best flights from Ontario to Heathrow
Discover carefully curated flight deals from Ontario to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 7 September 2026.

Sun 8/117:40 p.m. -

1 stop10h 10m

Sat 14/1112:15 p.m. -

1 stop11h 00m

Deal found 5/9C$ 780

Fri 2/102:35 p.m. -

1 stop10h 55m

Fri 9/109:30 a.m. -

1 stop9h 28m

Deal found 3/9C$ 902

Tue 27/107:30 p.m. -

1 stop33h 40m

Tue 3/118:50 p.m. -

1 stop20h 40m

Deal found 3/9C$ 917

Wed 21/105:00 p.m. -

1 stop9h 55m

Wed 28/106:30 a.m. -

1 stop15h 45m

Deal found 3/9C$ 920

Tue 1/125:00 p.m. -

1 stop9h 55m

Fri 11/128:40 a.m. -

1 stop13h 35m

Deal found 7/9C$ 923

Fri 18/96:05 a.m. -

2 stops19h 50m

Mon 21/98:40 a.m. -

2 stops20h 14m

Deal found 4/9C$ 945

Sun 13/910:55 p.m. -

Nonstop7h 15m

Sat 19/911:45 a.m. -

1 stop13h 10m

Deal found 6/9C$ 985

Thu 15/106:15 p.m. -

1 stop12h 35m

Mon 19/108:40 a.m. -

2 stops19h 18m

Deal found 6/9C$ 1,267

Tue 10/113:25 p.m. -

1 stop16h 25m

Mon 16/112:50 p.m. -

1 stop28h 35m

Deal found 5/9C$ 1,419

Sun 6/127:40 p.m. -

1 stop10h 10m

Sat 19/1212:15 p.m. -

1 stop10h 45m

Deal found 5/9C$ 913

Wed 9/126:00 a.m. -

1 stop20h 45m

Mon 14/1210:00 a.m. -

1 stop12h 15m

Deal found 2/9C$ 924

Tue 15/1212:50 p.m. -

1 stop13h 55m

Wed 20/110:00 a.m. -

1 stop12h 15m

Deal found 6/9C$ 939

Thu 1/106:25 a.m. -

1 stop21h 05m

Tue 6/108:45 a.m. -

2 stops20h 09m

Deal found 4/9C$ 945

Mon 23/111:15 p.m. -

1 stop12h 15m

Fri 27/111:00 p.m. -

Nonstop7h 35m

Deal found 6/9C$ 970

Fri 22/15:10 p.m. -

2 stops13h 55m

Fri 29/16:20 a.m. -

1 stop13h 40m

Deal found 2/9C$ 1,011

Sat 16/17:05 p.m. -

1 stop13h 40m

Fri 22/16:30 a.m. -

1 stop15h 45m

Deal found 6/9C$ 932

Fri 2/102:45 p.m. -

1 stop13h 15m

Sun 11/106:50 a.m. -

2 stops22h 04m

Deal found 3/9C$ 950

Wed 18/115:10 p.m. -

1 stop15h 35m

Sat 5/127:20 p.m. -

1 stop24h 40m

Deal found 6/9C$ 950

Fri 6/115:10 p.m. -

2 stops13h 55m

Sun 6/126:30 a.m. -

2 stops13h 30m

Deal found 7/9C$ 1,047

Fri 25/97:55 a.m. -

1 stop17h 00m

Tue 29/96:50 a.m. -

2 stops15h 29m

Deal found 2/9C$ 952

Wed 18/116:04 p.m. -

1 stop11h 26m

Wed 2/1211:45 a.m. -

2 stops16h 22m

Deal found 2/9C$ 956

Fri 22/15:10 p.m. -

2 stops13h 55m

Fri 29/16:30 a.m. -

2 stops13h 30m

Deal found 2/9C$ 1,054

Tue 17/117:05 p.m. -

1 stop10h 25m

Sat 28/118:55 a.m. -

1 stop11h 25m

Deal found 6/9C$ 963

Wed 30/911:45 a.m. -

2 stops13h 45m

Mon 5/109:30 a.m. -

1 stop10h 35m

Deal found 7/9C$ 1,108

Sat 19/91:15 p.m. -

1 stop14h 15m

Sat 26/96:50 a.m. -

2 stops15h 33m

Deal found 3/9C$ 952

Mon 12/105:10 p.m. -

2 stops12h 35m

Fri 16/105:50 p.m. -

1 stop11h 30m

Deal found 2/9C$ 1,057

Thu 8/107:25 p.m. -

2 stops56h 10m

Mon 12/106:50 a.m. -

2 stops16h 52m

Deal found 2/9C$ 1,310

Wed 30/98:30 a.m. -

2 stops16h 25m

Wed 7/106:50 a.m. -

2 stops15h 29m

Deal found 2/9C$ 952

Mon 5/1011:45 a.m. -

1 stop13h 45m

Mon 12/109:30 a.m. -

1 stop10h 35m

Deal found 6/9C$ 1,188

Tue 8/123:25 p.m. -

1 stop16h 25m

Wed 16/122:50 p.m. -

1 stop28h 35m

Deal found 5/9C$ 1,439

Find flight deals from Ontario to Heathrow

Round-trip from	C$ 743
One-way from	C$ 389
Popular in	December
Cheapest in	January
Average price	C$ 885
Good round-trip deal	C$ 1,090 or less
Good one-way deal	C$ 837 or less

Lufthansa
10/10-12/10
3 total stops
48h 38m total
Ontario to London

Search Deals

21/9-31/12
1 total stop
11h 05m total
Ontario to London

Search Deals

Highest demand for flights based on searches. 0% potential increase in price (C$ 9 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 35 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

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

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

Cheapest round-trip

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Tue 8/12

6:10 a.m.-12:50 p.m.

1 stop25h 40m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 396

TorontoLondon

YTZ Toronto Island - LHR London Heathrow

YTZLHR

Toronto Island

Thu 1/10

8:20 a.m.-6:30 a.m.

1 stop17h 10m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 450

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LHR London Heathrow

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 24/9

11:45 p.m.-8:05 p.m.

1 stop15h 20m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 452

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LHR London Heathrow

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sun 27/9

11:45 p.m.-9:10 a.m.

1 stop28h 25m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 455

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LHR London Heathrow

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sat 3/10

11:45 p.m.-9:10 a.m.

1 stop28h 25m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 457

TorontoLondon

YTZ Toronto Island - LHR London Heathrow

YTZLHR

Toronto Island

Fri 23/10

5:30 p.m.-9:00 p.m.

2 stops22h 30m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 463

Thunder BayLondon

YQT Thunder Bay - LHR London Heathrow

YQTLHR

Thunder Bay

Tue 20/10

11:35 a.m.-3:00 p.m.

3 stops22h 25m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 470

TorontoLondon

YYZ Toronto Pearson Intl - LHR London Heathrow

YYZLHR

Toronto Pearson Intl

Thu 5/11

5:35 p.m.-9:20 a.m.

1 stop10h 45m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 472

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Tue 12/1

4:15 p.m.-12:50 p.m.

1 stop15h 35m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 472

HamiltonLondon

YHM Hamilton - LHR London Heathrow

YHMLHR

Hamilton

Mon 5/10

5:30 a.m.-8:35 a.m.

1 stop22h 05m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 473

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

YYZ-LHR

YOW-LHR

YUL-LHR

YQT-LHR

YHM-LHR

Estimated round-trip 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

CAON-LHR

YYZ-LHR

YOW-LHR

YUL-LHR

YQT-LHR

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

Currently, February is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of C$ 833). Flying from Region of Ontario to London Heathrow Airport in December is currently the most expensive (average of C$ 1,354). 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 (45 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (33 on average).

How much does it cost to fly round-trip 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 C$ 887 and C$ 1,130 in October.
The cheapest round-trip price found within the last 5 days was C$ 776 on TAP AIR PORTUGAL (22 Oct-8 Nov).

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

To ensure you get the cheapest price possible for a flight from Region of Ontario to London Heathrow Airport, you should look to book at least 68 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.

Related info for your journey

How long is the flight from Region of Ontario to London Heathrow Airport?
A quick flight from Region of Ontario to London Heathrow Airport can take about 6h 35m. Lufthansa provides one of the quickest options available for as low as C$ 858. The distance between Region of Ontario and London Heathrow Airport is about 5343 km. This flight may include one or multiple stops.
What are the cheapest airlines to fly from Region of Ontario to London Heathrow Airport one-way?
The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as C$ 327. However, be on the lookout for offers from Icelandair and Air Canada, as they are both options that can get you from Region of Ontario to London Heathrow Airport for a low price.
What are the most popular routes from Region of Ontario to London Heathrow Airport?
The most popular flight routes from Region of Ontario to London Heathrow Airport are Toronto Pearson Intl - London Heathrow, Montreal Pierre Elliott Trudeau Intl - London Heathrow and Toronto Island - London Heathrow.
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 (81%), Air France (81%) or Delta (81%) 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?
On average you can expect to pay C$ 2,396 for a flight from Region of Ontario to London Heathrow Airport. The cheapest flight overall is C$ 588 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 631.
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 vacation 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, February is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of C$ 833). Flying from Region of Ontario to London Heathrow Airport in December is currently the most expensive (average of C$ 1,354). 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

Gatwick

Romford

Twickenham

Ilford

Bromley

Sutton

Luton

Slough

Marlow

Cobham

Hounslow

Leamington Spa

Northampton

Watford

High Wycombe

Stratford-upon-Avon

Moreton-in-Marsh

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to England

Flights by cabin class

Heathrow flight routes

Other flight options

Popular flights

Top destinations

Alternative routes for Ontario to Heathrow

Vancouver Intl to Heathrow flights

Pearson Intl to Heathrow flights

Pearson Intl to Gatwick flights

Pearson Intl to London City flights

Pierre Elliott Trudeau Intl to Heathrow flights

Vancouver Intl to London City flights

Pearson Intl to Stansted flights

Toronto Island to Heathrow flights

Calgary to Heathrow flights

Vancouver Intl to Stansted flights

Vancouver Intl to Gatwick flights

Pearson Intl to Luton flights

Abbotsford to Heathrow flights

Halifax to Heathrow flights

Vancouver Intl to Luton flights

Pierre Elliott Trudeau Intl to London City flights

Pierre Elliott Trudeau Intl to Gatwick flights

Pierre Elliott Trudeau Intl to Stansted flights

Toronto Island to Gatwick flights

Calgary to Gatwick flights

Pierre Elliott Trudeau Intl to Luton flights

Ottawa to Heathrow flights

Calgary to London City flights

Halifax to Gatwick flights

Calgary to Stansted flights

Calgary to Luton flights

Edmonton to Heathrow flights

Victoria to Heathrow flights

Abbotsford to Gatwick flights

Ottawa to Gatwick flights

Halifax to London City flights

Pierre Elliott Trudeau Intl to Southend flights

Ottawa to London City flights

Kelowna to Heathrow flights

Halifax to Stansted flights

Victoria to Gatwick flights

Edmonton to Gatwick flights

Winnipeg to Heathrow flights

Edmonton to London City flights

Victoria to London City flights

Abbotsford to London City flights

Winnipeg to Gatwick flights

Kelowna to Gatwick flights

Ottawa to Stansted flights

Edmonton to Stansted flights

Hamilton to Heathrow flights

Toronto Island to London City flights

Top 10 airlines flying from Ontario to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	CheapestC$ 479	AverageC$ 968	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
TAP AIR PORTUGAL	CheapestC$ 601	AverageC$ 797	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Icelandair	CheapestC$ 654	AverageC$ 756	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Iberia	CheapestC$ 703	AverageC$ 976	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Air Transat	CheapestC$ 711	AverageC$ 1,043	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
Aer Lingus	CheapestC$ 732	AverageC$ 1,046	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
KLM	CheapestC$ 747	AverageC$ 963	FlexibilityNo cancel fee	On-time75%	Search KLM flights
American Airlines	CheapestC$ 768	AverageC$ 928	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
British Airways	CheapestC$ 769	AverageC$ 1,058	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air France	CheapestC$ 770	AverageC$ 1,283	FlexibilityNo cancel fee	On-time77%	Search Air France flights

Fly with Cheapflights

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

Cheapflights helps you search for flights from Ontario to Heathrow via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Ontario to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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! Start tracking prices for Ontario to Heathrow flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Ontario to London Heathrow Airport from C$ 389

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap 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 7 September 2026.

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 7 September 2026.

Best flights from Ontario to HeathrowDiscover carefully curated flight deals from Ontario to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 7 September 2026.

Discover carefully curated flight deals from Ontario to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 7 September 2026.

Direct flights from Ontario to HeathrowExplore direct flight options from Ontario to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 7 September 2026.

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 7 September 2026.

Last-minute flights from Ontario to HeathrowDiscover last-minute flight deals from Ontario to Heathrow. Data last updated 7 September 2026 and is based on user searches.

Discover last-minute flight deals from Ontario to Heathrow. Data last updated 7 September 2026 and is based on user searches.

One-way flights from Ontario to HeathrowSearch for one-way flight options from Ontario to Heathrow. Find affordable one-way fares based on user searches. Data last updated 7 September 2026.

Search for one-way flight options from Ontario to Heathrow. Find affordable one-way fares based on user searches. Data last updated 7 September 2026.

Find flight deals from Ontario to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

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

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 7 September 2026.

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

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 7 September 2026.

The most flights from CAON to LHR are scheduled on a Thursday (45 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (33 on average).

How much does it cost to fly round-trip 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 C$ 887 and C$ 1,130 in October.The cheapest round-trip price found within the last 5 days was C$ 776 on TAP AIR PORTUGAL (22 Oct-8 Nov).

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

To ensure you get the cheapest price possible for a flight from Region of Ontario to London Heathrow Airport, you should look to book at least 68 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.

Related info for your journey

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.

Complete your trip

Complete your trip to Heathrow by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to England

Book a non-stop flight to one of these other cities located in England.

Search flights from Ontario to Heathrow by cabin class

Find flights from Ontario to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Heathrow

Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 7 September 2026.

Ontario and Heathrow flights

Browse other Ontario and Heathrow flight options. Last updated on 7 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Ontario to Heathrow flights

Consider these flights travelling from Ontario to Heathrow.

Top 10 airlines flying from Ontario to Heathrow

Fly with Cheapflights

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 7 September 2026.

Best flights from Ontario to Heathrow
Discover carefully curated flight deals from Ontario to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 7 September 2026.

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 7 September 2026.

Last-minute flights from Ontario to Heathrow
Discover last-minute flight deals from Ontario to Heathrow. Data last updated 7 September 2026 and is based on user searches.

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 7 September 2026.

Region of Ontario to London Heathrow Airport flights typically cost between C$ 887 and C$ 1,130 in October.
The cheapest round-trip price found within the last 5 days was C$ 776 on TAP AIR PORTUGAL (22 Oct-8 Nov).