Cheap flights from the United Kingdom to Ontario from £392
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from United Kingdom to Ontario
Keep the following information in mind while searching for United Kingdom to Ontario flight deals. Data was last updated 8 July 2025.
Round-trip from | £392 |
---|---|
Popular in | August |
Cheapest in | February |
Average price | £582 |
Find flight deals from United Kingdom to Ontario
Cheapest flights from United Kingdom to OntarioExplore the most affordable flight options available from United Kingdom to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 July 2025.
Explore the most affordable flight options available from United Kingdom to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from United Kingdom 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 8 July 2025.
Use the filters below to find and compare flights from the United Kingdom to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonOntario
LHR - ONT
LHRONT
London Heathrow
Sun 24/8
10:55-23:40
1 stop20h 45m
Ontario
Tue 9/9
11:40-14:15
1 stop18h 35m
LondonOntario
LGW - ONT
LGWONT
London Gatwick
Thu 28/8
15:05-11:32
2 stops28h 27m
Ontario
Wed 10/9
06:10-08:10
2 stops18h 00m
LondonOntario
LHR - ONT
LHRONT
London Heathrow
Sun 24/8
10:55-23:40
1 stop20h 45m
Ontario
Tue 9/9
06:05-06:25
2 stops40h 20m
LondonOntario
LHR - ONT
LHRONT
London Heathrow
Sun 31/8
15:10-22:14
1 stop15h 04m
Ontario
Sat 13/9
14:54-12:45
1 stop13h 51m
LondonOntario
LHR - ONT
LHRONT
London Heathrow
Fri 26/9
12:00-18:54
1 stop14h 54m
Ontario
Wed 8/10
16:49-12:50
1 stop12h 01m
LondonOntario
LHR - ONT
LHRONT
London Heathrow
Mon 24/11
19:05-09:28
2 stops22h 23m
Ontario
Fri 5/12
10:57-10:00
1 stop15h 03m
LondonOntario
LHR - ONT
LHRONT
London Heathrow
Tue 25/11
06:30-22:41
2 stops24h 11m
Ontario
Fri 5/12
06:00-12:15
2 stops22h 15m
LondonOntario
LHR - ONT
LHRONT
London Heathrow
Mon 1/9
15:40-21:39
1 stop13h 59m
Ontario
Wed 17/9
16:45-12:50
1 stop12h 05m
LondonOntario
LHR - ONT
LHRONT
London Heathrow
Wed 3/9
12:00-18:54
1 stop14h 54m
Ontario
Tue 9/9
12:45-10:50
1 stop14h 05m
ManchesterOntario
MAN - ONT
MANONT
Manchester
Wed 19/11
05:55-23:46
2 stops25h 51m
Ontario
Tue 2/12
06:00-16:35
2 stops26h 35m
Best time to book a flight from United Kingdom to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from United Kingdom with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from the United Kingdom to Ontario
What is the cheapest month to book a flight from United Kingdom to Ontario?
Currently, March is the cheapest month in which you can book a flight from United Kingdom to Ontario (average of £516). Flying from United Kingdom to Ontario in August is currently the most expensive (average of £827). 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 GB to ONT?
Find hourly flight availability from United Kingdom 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 8 July 2025.
When flying from United Kingdom to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
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 8 July 2025.
Read through reviews of airlines operating flights from the United Kingdom to Ontario, such as Delta, KLM, andFinnair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
Overall
Boarding
Food
Comfort
Entertainment
Reviews
Aaron,Oct 2024
TUS - LAX
Crew
Overall
Boarding
Food
Comfort
Entertainment
Reviews
Aaron,Oct 2024
TUS - LAX
Crew
Overall
Boarding
Food
Comfort
Entertainment
Reviews
Aaron,Oct 2024
TUS - LAX
Crew
Overall
Boarding
Food
Comfort
Entertainment
Reviews
Aaron,Oct 2024
TUS - LAX
Crew
Overall
Boarding
Food
Comfort
Entertainment
Reviews
Aaron,Oct 2024
TUS - LAX
Crew
Overall
Boarding
Food
Comfort
Entertainment
Reviews
Aaron,Oct 2024
TUS - LAX
Related info for your journey
Find useful and relevant information for your journey from United Kingdom 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 United Kingdom to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from United Kingdom to Ontario
Discover the top 6 airlines that operate flights from United Kingdom 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 8 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 United Kingdom to Ontario?
Deals for United Kingdom to Ontario flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.
Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Ontario?
Cheapflights simply makes it quick and affordable to book flights from United Kingdom to Ontario by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
Can Cheapflights find flights from United Kingdom to Ontario with no change fees?
Need flexible booking options for your flight to Ontario from United Kingdom? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.
Can Cheapflights notify me if prices for flights from United Kingdom to Ontario become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ontario from United Kingdom today and book when prices fit your budget.