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Cheap flights from the United Kingdom to Ontario from C$ 457
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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YYZ
4 Aug — 11 Aug1
Round-trip
1 adult
Economy
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 30 July 2025.
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 30 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 30 July 2025.
Wed 27/89:40 a.m.LGW - YUL
1 stop14h 40mAir Transat
Wed 17/910:05 p.m.YUL - LGW
Nonstop6h 45mAir Transat
Deal found 30/7C$ 637
Sat 20/95:40 p.m.LHR - YUL
1 stop32h 13mLufthansa
Mon 22/98:40 p.m.YUL - LHR
1 stop21h 00mLufthansa
Deal found 29/7C$ 640
Fri 5/96:00 a.m.LHR - YUL
1 stop14h 00mSWISS
Sun 21/94:40 p.m.YUL - LHR
1 stop10h 15mSWISS
Deal found 28/7C$ 646
Sun 31/81:10 p.m.LGW - YTZ
1 stop26h 12mAir Transat
Fri 12/96:55 p.m.YTZ - LGW
1 stop9h 55mAir Transat
Deal found 28/7C$ 652
Fri 19/96:00 a.m.LHR - YYZ
1 stop12h 50mAir Canada
Mon 29/99:30 p.m.YYZ - LHR
Nonstop7h 30mAir Canada
Deal found 28/7C$ 652
Fri 29/811:35 a.m.LGW - YYZ
1 stop12h 33mAir Transat
Sun 28/910:45 p.m.YYZ - LGW
Nonstop7h 00mAir Transat
Deal found 28/7C$ 652
Tue 2/98:15 a.m.STN - YYZ
1 stop10h 55mMultiple Airlines
Wed 10/910:10 p.m.YYZ - STN
1 stop9h 35mMultiple Airlines
Deal found 29/7C$ 654
Mon 15/99:55 p.m.LTN - YYZ
1 stop21h 15mMultiple Airlines
Wed 24/911:55 p.m.YYZ - LTN
1 stop10h 30mMultiple Airlines
Deal found 30/7C$ 655
Thu 25/910:30 a.m.LHR - YYZ
1 stop14h 15mLufthansa
Sat 11/106:20 p.m.YYZ - LHR
Nonstop7h 15mLufthansa
Deal found 28/7C$ 655
Thu 4/96:50 a.m.LHR - YTZ
2 stops12h 55mAir Canada
Sat 13/93:25 p.m.YTZ - LHR
1 stop10h 05mAir Canada
Deal found 27/7C$ 655
Thu 11/910:30 a.m.LHR - YUL
1 stop10h 30mMultiple Airlines
Thu 18/94:40 p.m.YUL - LHR
1 stop13h 45mMultiple Airlines
Deal found 27/7C$ 659
Tue 11/116:00 a.m.LHR - YTZ
2 stops17h 00mSWISS
Fri 14/115:30 p.m.YTZ - LHR
2 stops15h 10mSWISS
Deal found 28/7C$ 659
Cheapflights Fare Finder
Customize 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 629,999 searches. Data last updated 30 July 2025.
Use the filters below to find and compare flights from the United Kingdom to Ontario that are best for you.
Fly from
United Kingdom
Fly to
Ontario
Route
Depart
Return
Price
LondonMontreal
LGW - YUL
LGWYUL
London Gatwick
Wed 27/8
9:40 a.m.-7:20 p.m.
1 stop14h 40m
Montreal Pierre Elliott Trudeau Intl
Wed 17/9
10:05 p.m.-9:50 a.m.
Nonstop6h 45m
C$ 637
LondonMontreal
LHR - YUL
LHRYUL
London Heathrow
Thu 1/1
9:00 a.m.-3:10 p.m.
1 stop11h 10m
Montreal Pierre Elliott Trudeau Intl
Thu 8/1
4:45 p.m.-5:50 p.m.
1 stop20h 05m
C$ 639
LondonMontreal
LHR - YUL
LHRYUL
London Heathrow
Sat 20/9
5:40 p.m.-8:53 p.m.
1 stop32h 13m
Montreal Pierre Elliott Trudeau Intl
Mon 22/9
8:40 p.m.-10:40 p.m.
1 stop21h 00m
C$ 640
LondonToronto
LHR - YYZ
LHRYYZ
London Heathrow
Fri 19/9
6:00 a.m.-1:50 p.m.
1 stop12h 50m
Toronto Pearson Intl
Mon 29/9
9:30 p.m.-10:00 a.m.
Nonstop7h 30m
C$ 652
LondonToronto
LGW - YTZ
LGWYTZ
London Gatwick
Sun 31/8
1:10 p.m.-10:22 a.m.
1 stop26h 12m
Toronto Island
Fri 12/9
6:55 p.m.-9:50 a.m.
1 stop9h 55m
C$ 652
LondonToronto
LGW - YYZ
LGWYYZ
London Gatwick
Fri 29/8
9:40 a.m.-12:45 p.m.
Nonstop8h 05m
Toronto Pearson Intl
Mon 22/9
6:00 p.m.-9:50 a.m.
1 stop10h 50m
C$ 652
LondonToronto
STN - YYZ
STNYYZ
London Stansted
Tue 2/9
8:15 a.m.-2:10 p.m.
1 stop10h 55m
Toronto Pearson Intl
Wed 10/9
10:10 p.m.-12:45 p.m.
1 stop9h 35m
C$ 654
LondonToronto
LTN - YYZ
LTNYYZ
London Luton
Mon 15/9
9:55 p.m.-2:10 p.m.
1 stop21h 15m
Toronto Pearson Intl
Wed 24/9
11:55 p.m.-3:25 p.m.
1 stop10h 30m
C$ 655
LondonToronto
LHR - YYZ
LHRYYZ
London Heathrow
Thu 25/9
11:30 a.m.-7:45 p.m.
1 stop13h 15m
Toronto Pearson Intl
Fri 3/10
8:30 p.m.-8:35 a.m.
Nonstop7h 05m
C$ 655
LondonToronto
LHR - YTZ
LHRYTZ
London Heathrow
Thu 4/9
6:50 a.m.-2:45 p.m.
2 stops12h 55m
Toronto Island
Sat 13/9
3:25 p.m.-6:30 a.m.
1 stop10h 05m
C$ 655
Showing 1-10 of 50 results
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.
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 the United Kingdom to Ontario
What is the cheapest month to book a flight from United Kingdom to Region of Ontario?
Currently, January is the cheapest month in which you can book a flight from United Kingdom to Region of Ontario (average of C$ 167). Flying from United Kingdom to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 ON?
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 30 July 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from United Kingdom to Region of Ontario as you normally would.
Weekly flight availability from United Kingdom to Region of Ontario
Explore weekly flight availability from United Kingdom 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 30 July 2025.
The most flights from GB0 to CAON are scheduled on a Monday (39 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (30 on average).
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 30 July 2025.
Read reviews from past customers who have flown Air Transat,Austrian Airlines, andSWISS from the United Kingdom to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
7.9
Crew
8.4
Food
6.7
Overall
7.7
Comfort
7.3
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentLiam,Jun 2025
GLA - YYZ
Boarding
7.9
Crew
8.4
Food
6.7
Overall
7.7
Comfort
7.3
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentLiam,Jun 2025
GLA - YYZ
Boarding
7.9
Crew
8.4
Food
6.7
Overall
7.7
Comfort
7.3
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentLiam,Jun 2025
GLA - YYZ
Boarding
7.9
Crew
8.4
Food
6.7
Overall
7.7
Comfort
7.3
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentLiam,Jun 2025
GLA - YYZ
Boarding
7.9
Crew
8.4
Food
6.7
Overall
7.7
Comfort
7.3
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentLiam,Jun 2025
GLA - YYZ
Boarding
7.9
Crew
8.4
Food
6.7
Overall
7.7
Comfort
7.3
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentLiam,Jun 2025
GLA - YYZ
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.
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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 10 airlines flying from United Kingdom to Ontario
Discover the top 10 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 629,999 searches. Data last updated 30 July 2025.
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 United Kingdom to Ontario?
When you search for this flight from United Kingdom 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 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?
Yes, we can. To see specific flights from United Kingdom 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 United Kingdom to Ontario become cheaper?
Yes! Start tracking prices for United Kingdom to Ontario 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.