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Cheap flights from Ontario to Belfast from £293

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 23/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
18 May — 25 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Belfast

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Belfast
Explore the most affordable flight options available from Ontario to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 April 2026.

Sun 8/1116:47
ONT
-
BHD
2 stops16h 03m
British Airways
Tue 17/1111:25
BHD
-
ONT
2 stops18h 34m
British Airways
Deal found 13/4£665
Tue 28/713:10
ONT
-
BHD
2 stops21h 45m
British Airways
Thu 13/809:35
BHD
-
ONT
2 stops19h 37m
British Airways
Deal found 12/4£749
Mon 4/516:52
ONT
-
BHD
2 stops17h 53m
British Airways
Tue 19/509:40
BHD
-
ONT
2 stops19h 14m
British Airways
Deal found 15/4£763
Wed 9/916:59
ONT
-
BHD
2 stops17h 46m
British Airways
Wed 23/910:05
BHD
-
ONT
2 stops19h 03m
British Airways
Deal found 13/4£771
Mon 10/812:33
ONT
-
BHD
2 stops18h 57m
British Airways
Thu 20/806:30
BHD
-
ONT
2 stops22h 42m
British Airways
Deal found 13/4£780
Tue 15/916:59
ONT
-
BHD
2 stops17h 56m
British Airways
Wed 30/910:05
BHD
-
ONT
2 stops19h 03m
British Airways
Deal found 13/4£791
Mon 28/1214:42
ONT
-
BHD
2 stops17h 23m
American Airlines
Tue 5/111:25
BHD
-
ONT
2 stops18h 49m
American Airlines
Deal found 12/4£834
Mon 28/1212:55
ONT
-
BHD
2 stops23h 20m
British Airways
Tue 5/106:35
BHD
-
ONT
2 stops23h 39m
British Airways
Deal found 14/4£836
Wed 13/516:52
ONT
-
BHD
2 stops17h 53m
British Airways
Wed 20/518:20
BHD
-
ONT
2 stops32h 02m
British Airways
Deal found 13/4£887
Tue 12/516:52
ONT
-
BHD
2 stops18h 03m
British Airways
Tue 26/509:40
BHD
-
ONT
2 stops18h 16m
British Airways
Deal found 14/4£909
Wed 6/517:05
ONT
-
BHD
2 stops15h 50m
KLM
Wed 13/509:50
BHD
-
ONT
2 stops20h 44m
KLM
Deal found 16/4£912

Find flight deals from Ontario to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Belfast (BF1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 April 2026.

Round-trip from

£763

One-way from

£293

Popular in

June

Cheapest in

October
British Airways
  • British Airways
  • 4/5-19/5
  • 4 total stops
  • 37h 07m total
  • Ontario to Belfast
Search Deals
British Airways
  • British Airways
  • 23/7
  • 2 total stops
  • 22h 46m total
  • Ontario to Belfast
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£127 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ontario to Belfast 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 18 April 2026.
Use the filters below to find and compare flights from Ontario to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 28/7

13:10-18:55

2 stops21h 45m

Belfast City

Thu 13/8

09:35-21:12

2 stops19h 37m

£749

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 4/5

16:52-18:45

2 stops17h 53m

Belfast City

Tue 19/5

09:40-20:54

2 stops19h 14m

£763

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 9/9

16:59-18:45

2 stops17h 46m

Belfast City

Wed 23/9

10:05-21:08

2 stops19h 03m

£771

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 10/8

12:33-15:30

2 stops18h 57m

Belfast City

Thu 20/8

06:30-21:12

2 stops22h 42m

£780

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 15/9

16:59-18:55

2 stops17h 56m

Belfast City

Wed 30/9

10:05-21:08

2 stops19h 03m

£791
Fastest return journey

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 12/5

16:52-18:55

2 stops18h 03m

Belfast City

Tue 26/5

09:40-19:56

2 stops18h 16m

£909

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 6/5

17:05-16:55

2 stops15h 50m

Belfast City

Wed 13/5

09:50-22:34

2 stops20h 44m

£912

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sat 12/9

16:59-18:15

2 stops17h 16m

Belfast City

Sat 26/9

09:35-21:08

2 stops19h 33m

£1,065

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 13/5

16:52-18:45

2 stops17h 53m

Belfast City

Wed 20/5

10:05-22:40

2 stops20h 35m

£1,272

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 5/5

16:52-18:55

2 stops18h 03m

Belfast City

Sat 16/5

09:35-22:40

2 stops21h 05m

£1,274

Flights are sorted by cheapest return flights first.

Deals found on 16/4

Showing 1-10 of 19 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Ontario with our price prediction graph.
Estimated return 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 Ontario to Belfast
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Belfast. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Belfast?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Belfast. You should not have trouble finding flights to Belfast from Ontario; the airport handles an average of 0 outbound flights to Belfast per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Ontario airport to Belfast. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • How long is the flight from Ontario to Belfast?

    Departing from Ontario to Belfast will take you 21h 45m. The distance between Ontario and Belfast is about 5095 mi.

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

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

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

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

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

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

See more FAQs

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Alternative routes for Ontario to Belfast

See prices for flight routes from nearby airports that may be better suited for you.
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San Francisco to Belfast City flights

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Belfast from Ontario today with Cheapflights!

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

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 Ontario to Belfast.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Belfast flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ontario to Belfast become cheaper?

Of course! You can now track prices for flights from Ontario to Belfast 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.

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