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 | £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 |
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.
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
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
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
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
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
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
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
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
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
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
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?
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?
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.
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 16 September 2025.
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
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.
Travelling to a place near London Heathrow Airport?
Book flights to London Heathrow Airport if you plan to visit one of these locationsBrowse 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
Discover the top 10 airlines that operate flights from Ontario to Heathrow. 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 858,174 searches. Data last updated 16 September 2025.
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?
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!