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Cheap flights from Ontario to Belfast from £654

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
11 Dec — 18 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 11 November 2025.

Tue 9/1206:00ONT - BHD
2 stops26h 50mKLM
Tue 16/1217:20BHD - ONT
2 stops30h 49mKLM
Deal found 9/11£886
Sat 6/1216:47ONT - BHD
2 stops15h 58mBritish Airways
Fri 12/1211:30BHD - ONT
2 stops18h 58mBritish Airways
Deal found 10/11£1,003

Cheap 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 11 November 2025.

Round-trip from

£654

Popular in

June

Cheapest in

October

Average price

£680
Delta
  • Delta
  • 3/4-7/4
  • 4 total stops
  • 39h 58m total
  • Ontario to Belfast
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£114 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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 11 November 2025.
Use the filters below to find and compare flights from Ontario to Belfast that are best for you.

Fly from

Ontario

Fly to

Belfast

Route

Depart

Return

Price

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 3/4

17:05-16:55

2 stops15h 50m

Belfast City

Tue 7/4

17:25-23:52

2 stops38h 27m

£654

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 29/4

13:00-16:55

2 stops19h 55m

Belfast City

Sun 3/5

06:30-23:44

2 stops25h 14m

£740

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 27/3

10:57-10:30

2 stops16h 33m

Belfast City

Fri 3/4

06:35-17:49

2 stops19h 14m

£772

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 29/4

12:55-15:35

2 stops18h 40m

Belfast City

Sun 3/5

06:50-17:46

2 stops18h 56m

£791

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 29/4

17:02-18:40

2 stops17h 38m

Belfast City

Sun 3/5

20:05-21:56

2 stops33h 51m

£792

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sat 28/3

13:00-15:55

2 stops19h 55m

Belfast City

Fri 3/4

06:30-16:19

2 stops17h 49m

£808

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 9/12

06:00-16:50

2 stops26h 50m

Belfast City

Tue 16/12

17:20-16:09

2 stops30h 49m

£886

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sat 6/12

16:47-16:45

2 stops15h 58m

Belfast City

Fri 12/12

11:30-22:28

2 stops18h 58m

£1,003

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 4/2

13:04-16:50

2 stops19h 46m

Belfast City

Thu 12/2

17:20-16:04

2 stops30h 44m

£4,632

Flights are sorted by cheapest return flights first.

Deals found on 8/11

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

What is the cheapest month to book a flight from Ontario to Belfast?

Currently, March is the cheapest month in which you can book a flight from Ontario to Belfast (average of £445). Flying from Ontario to Belfast in June is currently the most expensive (average of £704). 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.

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 15h 50m. The distance between Ontario and Belfast is about 5095 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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.

  • What is the cheapest month to book a flight from Ontario to Belfast?

    Currently, March is the cheapest month in which you can book a flight from Ontario to Belfast (average of £445). Flying from Ontario to Belfast in June is currently the most expensive (average of £704). 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.

See more FAQs

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Alternative routes for Ontario to Belfast

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Fly with Cheapflights

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

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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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