Cheap flights from London to Ontario from £250
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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from London to Ontario
Keep the following information in mind while searching for London to Ontario flight deals. Data was last updated 15 July 2025.
Round-trip from | £345 |
---|---|
One-way from | £250 |
Popular in | December |
Cheapest in | February |
Average price | £515 |
Good round-trip deal | £379 or less |
Good one-way deal | £242 or less |
Find flight deals from London to Ontario
Cheapest flights from London to OntarioExplore the most affordable flight options available from London to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 July 2025.
Explore the most affordable flight options available from London to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from London 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 858,174 searches. Data last updated 15 July 2025.
Use the filters below to find and compare flights from London to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonToronto
LGW - YTZ
LGWYTZ
London Gatwick
Thu 28/8
11:35-10:22
1 stop27h 47m
Toronto Island
Sun 7/9
21:00-09:50
1 stop31h 50m
LondonToronto
LHR - YYZ
LHRYYZ
London Heathrow
Mon 17/11
12:15-18:15
1 stop11h 00m
Toronto Pearson Intl
Sat 29/11
19:45-19:30
1 stop18h 45m
LondonToronto
LGW - YYZ
LGWYYZ
London Gatwick
Wed 3/9
15:40-21:55
1 stop11h 15m
Toronto Pearson Intl
Fri 12/9
20:50-14:40
1 stop12h 50m
LondonToronto
LHR - YYZ
LHRYYZ
London Heathrow
Thu 2/10
17:50-20:40
Nonstop7h 50m
Toronto Pearson Intl
Wed 15/10
22:30-10:40
Nonstop7h 10m
LondonToronto
LGW - YYZ
LGWYYZ
London Gatwick
Mon 25/8
12:40-15:40
Nonstop8h 00m
Toronto Pearson Intl
Sun 7/9
23:15-09:50
1 stop29h 35m
LondonMontreal
LGW - YUL
LGWYUL
London Gatwick
Wed 27/8
09:40-00:37
1 stop19h 57m
Montreal Pierre Elliott Trudeau Intl
Wed 3/9
20:05-07:55
1 stop30h 50m
LondonMontreal
LHR - YUL
LHRYUL
London Heathrow
Mon 1/9
09:00-18:50
1 stop14h 50m
Montreal Pierre Elliott Trudeau Intl
Tue 9/9
16:40-07:55
1 stop10h 15m
LondonToronto
LHR - YYZ
LHRYYZ
London Heathrow
Thu 18/9
06:00-13:55
1 stop12h 55m
Toronto Pearson Intl
Sun 21/9
17:35-10:20
1 stop11h 45m
LondonToronto
LHR - YYZ
LHRYYZ
London Heathrow
Tue 16/9
17:15-20:10
Nonstop7h 55m
Toronto Pearson Intl
Tue 23/9
22:15-10:30
Nonstop7h 15m
LondonToronto
LHR - YYZ
LHRYYZ
London Heathrow
Thu 23/10
09:00-18:30
1 stop14h 30m
Toronto Pearson Intl
Sun 18/1
18:15-12:50
1 stop13h 35m
Best time to book a flight from London to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from London with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from London to Ontario
What is the cheapest month to book a flight from London to Region of Ontario?
Currently, January is the cheapest month in which you can book a flight from London to Region of Ontario (average of £490). Flying from London to Region of Ontario in July is currently the most expensive (average of £708). 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 LON to ON?
Find hourly flight availability from London 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 15 July 2025.
When flying from London 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 to Region of Ontario
Explore weekly flight availability from London 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 15 July 2025.
The most flights from LON to CAON are scheduled on a Tuesday (43 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (29 on average).
How much does it cost for a return flight from London 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 15 July 2025.
Read reviews from past customers who have flown with Delta, KLM, andAir Transat from London to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
Food
Boarding
Entertainment
Overall
Comfort
Reviews
Colin,Sept 2024
LHR - BOS
Crew
Food
Boarding
Entertainment
Overall
Comfort
Reviews
Colin,Sept 2024
LHR - BOS
Crew
Food
Boarding
Entertainment
Overall
Comfort
Reviews
Colin,Sept 2024
LHR - BOS
Crew
Food
Boarding
Entertainment
Overall
Comfort
Reviews
Colin,Sept 2024
LHR - BOS
Crew
Food
Boarding
Entertainment
Overall
Comfort
Reviews
Colin,Sept 2024
LHR - BOS
Crew
Food
Boarding
Entertainment
Overall
Comfort
Reviews
Colin,Sept 2024
LHR - BOS
Related info for your journey
Find useful and relevant information for your journey from London to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for London to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Top 10 airlines flying from London to Ontario
Discover the top 10 airlines that operate flights from London 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 858,174 searches. Data last updated 15 July 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 London to Ontario?
When you search for this flight from London to Ontario, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.
Why should you use Cheapflights to find cheap flight tickets from London to Ontario?
Millions of users choose and trust Cheapflights to book the best flight deals from London to Ontario 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 London to Ontario with no change fees?
Certainly. Search results for flights to Ontario from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from London to Ontario become cheaper?
Of course! You can now track prices for flights from London to Ontario and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.