Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Ontario from C$ 435

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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YYZ
25 May — 1 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Ontario
Explore the most affordable flight options available from Heathrow to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 April 2026.

Fri 15/56:00 a.m.
LHR
-
YOW
2 stops16h 11m
Multiple Airlines
Fri 22/52:40 p.m.
YOW
-
LHR
1 stop10h 50m
Multiple Airlines
Deal found 23/4C$ 682
Fri 15/56:00 a.m.
LHR
-
YOW
2 stops16h 11m
Multiple Airlines
Sat 23/52:40 p.m.
YOW
-
LHR
1 stop14h 20m
Multiple Airlines
Deal found 22/4C$ 684
Thu 24/98:45 a.m.
LHR
-
YOW
2 stops18h 25m
Air Canada
Wed 30/95:30 p.m.
YOW
-
LHR
1 stop22h 30m
Air Canada
Deal found 23/4C$ 699
Sat 13/66:00 a.m.
LHR
-
YOW
2 stops16h 11m
Multiple Airlines
Sat 27/63:10 p.m.
YOW
-
LHR
1 stop13h 50m
Multiple Airlines
Deal found 22/4C$ 705
Fri 5/66:00 a.m.
LHR
-
YOW
2 stops16h 11m
Multiple Airlines
Fri 12/62:35 p.m.
YOW
-
LHR
1 stop10h 55m
Multiple Airlines
Deal found 21/4C$ 706
Mon 8/66:40 p.m.
LHR
-
YOW
2 stops27h 31m
Multiple Airlines
Mon 29/67:30 p.m.
YOW
-
LHR
1 stop9h 30m
Multiple Airlines
Deal found 22/4C$ 710
Tue 19/56:00 a.m.
LHR
-
YOW
2 stops16h 11m
Multiple Airlines
Tue 26/58:05 p.m.
YOW
-
LHR
1 stop10h 45m
Multiple Airlines
Deal found 21/4C$ 712
Mon 21/99:30 a.m.
LHR
-
YOW
Nonstop7h 55m
Air Canada
Wed 14/109:00 p.m.
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 23/4C$ 713
Mon 8/69:30 a.m.
LHR
-
YOW
Nonstop7h 10m
Air Canada
Mon 29/66:55 p.m.
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 22/4C$ 714
Wed 10/62:10 p.m.
LHR
-
YOW
Nonstop7h 10m
Air Canada
Tue 16/65:50 p.m.
YOW
-
LHR
1 stop11h 10m
Air Canada
Deal found 25/4C$ 716
Thu 30/41:05 p.m.
LHR
-
YYZ
1 stop11h 05m
Icelandair
Thu 7/511:10 p.m.
YYZ
-
LHR
1 stop16h 10m
Icelandair
Deal found 22/4C$ 765
Thu 30/41:05 p.m.
LHR
-
YYZ
1 stop11h 05m
Icelandair
Mon 4/58:45 p.m.
YYZ
-
LHR
1 stop10h 10m
Icelandair
Deal found 22/4C$ 766

Find flight deals from Heathrow to Ontario

Keep the following information in mind while searching for Heathrow to Ontario flight deals. Data was last updated 25 April 2026.

Round-trip from

C$ 682

One-way from

C$ 435

Popular in

December

Cheapest in

February

Average price

C$ 846

Good round-trip deal

C$ 993 or less

Good one-way deal

C$ 690 or less
Lufthansa
  • Lufthansa
  • 15/5-22/5
  • 3 total stops
  • 27h 01m total
  • London to Ontario
Search Deals
11/5
  • 11/5
  • 3 total stops
  • 31h 35m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 29 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Ontario.
Search Deals
Price to beat on a one-way flight from London Heathrow to Ontario.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 25 April 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 27/5

8:40 a.m.-11:54 p.m.

2 stops20h 14m

Ottawa

Mon 29/6

3:10 p.m.-10:40 a.m.

2 stops14h 30m

C$ 780

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 19/6

6:50 a.m.-10:05 p.m.

2 stops20h 15m

Ottawa

Sun 28/6

6:00 a.m.-6:55 a.m.

1 stop19h 55m

C$ 790

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 19/6

6:50 a.m.-4:38 p.m.

2 stops14h 48m

Ottawa

Tue 30/6

6:05 a.m.-9:25 p.m.

1 stop10h 20m

C$ 790

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 19/6

6:50 a.m.-4:38 p.m.

2 stops14h 48m

Ottawa

Mon 29/6

10:00 a.m.-10:40 a.m.

1 stop19h 40m

C$ 790

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sat 20/6

6:50 a.m.-10:05 p.m.

2 stops20h 15m

Ottawa

Mon 29/6

6:05 a.m.-6:55 a.m.

2 stops19h 50m

C$ 790

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Tue 9/6

6:50 a.m.-4:38 p.m.

2 stops14h 48m

Ottawa

Mon 22/6

12:00 p.m.-7:15 a.m.

2 stops14h 15m

C$ 802

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Sat 23/5

6:50 a.m.-10:06 p.m.

2 stops20h 16m

Montreal Pierre Elliott Trudeau Intl

Sun 24/5

3:25 p.m.-8:20 a.m.

1 stop11h 55m

C$ 942

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 9/10

5:45 p.m.-12:20 a.m.

1 stop11h 35m

Ottawa

Sun 18/10

6:25 p.m.-1:50 p.m.

2 stops14h 25m

C$ 958

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 8/10

5:45 p.m.-12:20 a.m.

1 stop11h 35m

Ottawa

Sat 17/10

5:10 p.m.-10:45 a.m.

2 stops12h 35m

C$ 981

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Fri 25/9

9:30 a.m.-4:00 p.m.

1 stop11h 30m

Montreal Pierre Elliott Trudeau Intl

Sun 4/10

6:40 p.m.-6:30 a.m.

Nonstop6h 50m

C$ 999

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/4

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from Heathrow to Ontario

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

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

The price you pay for your flight from London Heathrow Airport to Region of Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 42 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Region of Ontario (average of C$ 691). Flying from London Heathrow Airport to Region of Ontario in December is currently the most expensive (average of C$ 1,051). 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 LHR to ON?

Find hourly flight availability from Heathrow to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 April 2026.

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

Explore weekly flight availability from Heathrow to Ontario. 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 25 April 2026.

The most flights from LHR to CAON are scheduled on a Friday (40 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (23 on average).

How much does it cost to fly round-trip from London Heathrow Airport to Region of Ontario?

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 25 April 2026.
Read reviews from past customers who have flown United Airlines,Virgin Atlantic, andAir Canada from London Heathrow Airport to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,657 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
9,657 reviews
United Airlines
7.4
Good
9,657 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Virgin Atlantic
7.4
Good
688 reviews
United Airlines
7.4
Good
9,657 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Air Canada
7.1
Good
10,969 reviews
United Airlines
7.4
Good
9,657 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Lufthansa
6.8
Okay
7,950 reviews
United Airlines
7.4
Good
9,657 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
British Airways
6.7
Okay
7,919 reviews
United Airlines
7.4
Good
9,657 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Ontario. 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 London Heathrow Airport to Region of Ontario?

    United Airlines, Lufthansa, and KLM can get you from London Heathrow Airport to Region of Ontario in just under 7h 50m. Your travel time can differ by up to 12h 24m. The distance between London Heathrow Airport and Region of Ontario is about 5702 km. Both multi-stop and direct flights can be found to your destination and back.

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

    One-way options have recently been found by users for as low as C$ 384 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Aer Lingus from C$ 406 and Icelandair from C$ 444 one-way.

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

    The most popular route from London Heathrow Airport to Region of Ontario is London Heathrow - Toronto Pearson Intl. You may also consider London Heathrow - Toronto Island or London Heathrow - Montreal Pierre Elliott Trudeau Intl.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London Heathrow Airport to Region of Ontario on time: Thai Airways (80%), United Airlines (79%), Lufthansa (79%).

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

    While on average a flight from London Heathrow Airport to Region of Ontario is generally C$ 1,141, our data shows the cheapest flight currently is C$ 620. When looking at the most popular route, (London Heathrow - Toronto Pearson Intl), you can expect to pay C$ 675 for that flight.

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

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

  • How can I find direct flights from Heathrow to Ontario?

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Region of Ontario (average of C$ 691). Flying from London Heathrow Airport to Region of Ontario in December is currently the most expensive (average of C$ 1,051). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from Heathrow to Ontario

Discover the top 10 airlines that operate flights from Heathrow to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 25 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapestC$ 436AverageC$ 1,062FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
LufthansaCheapestC$ 556AverageC$ 900FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapestC$ 607AverageC$ 717FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapestC$ 621AverageC$ 864FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air CanadaCheapestC$ 646AverageC$ 947FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapestC$ 648AverageC$ 922FlexibilityNo cancel feeOn-time70%
Search British Airways flights
DeltaCheapestC$ 652AverageC$ 876FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Virgin AtlanticCheapestC$ 709AverageC$ 945FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapestC$ 721AverageC$ 1,289FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air FranceCheapestC$ 788AverageC$ 1,325FlexibilityNo cancel feeOn-time77%
Search Air France flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Ontario.

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

Yes, we can. To see specific flights from Heathrow to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Heathrow to Ontario 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.