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Cheap flights from Ontario to Northern Ireland from £381

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 26/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BFS
20 Nov — 27 Nov1
1 adult
1 adult, Economy

Cheap flight deals from Ontario to Northern Ireland

Keep the following information in mind while searching for Ontario to Northern Ireland flight deals. Data was last updated 21 October 2025.

Round-trip from

£658

One-way from

£381

Popular in

June

Cheapest in

October

Average price

£472
British Airways
  • British Airways
  • 5/1-12/1
  • 4 total stops
  • 36h 52m total
  • Ontario to Northern Ireland
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Delta
  • Delta
  • 26/10
  • 2 total stops
  • 20h 35m total
  • Ontario to Northern Ireland
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£117 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
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Find flight deals from Ontario to Northern Ireland

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Northern Ireland
Explore the most affordable flight options available from Ontario to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 October 2025.

Sun 2/1112:53ONT - BHD
2 stops17h 02mMultiple Airlines
Sun 9/1109:10BHD - ONT
2 stops22h 47mMultiple Airlines
Deal found 19/10£1,017
Mon 15/1216:47ONT - BHD
2 stops15h 18mBritish Airways
Mon 5/111:30BHD - ONT
2 stops18h 44mBritish Airways
Deal found 20/10£1,902
Tue 16/1210:47ONT - BHD
2 stops16h 43mMultiple Airlines
Sat 3/111:35BHD - ONT
2 stops18h 39mMultiple Airlines
Deal found 20/10£2,498

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ontario to Northern Ireland 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 21 October 2025.
Use the filters below to find and compare flights from Ontario to Northern Ireland that are best for you.

Fly from

Ontario

Fly to

Northern Ireland

Route

Depart

Return

Price

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 5/1

16:47-16:05

2 stops15h 18m

Belfast City

Mon 12/1

09:15-22:49

2 stops21h 34m

£658

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 3/4

13:00-21:20

2 stops24h 20m

Belfast City

Tue 7/4

17:25-16:19

2 stops30h 54m

£688

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 3/4

10:30-15:30

2 stops21h 00m

Belfast City

Tue 7/4

06:35-17:45

2 stops19h 10m

£747

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 2/11

12:53-13:55

2 stops17h 02m

Belfast City

Sun 9/11

09:10-23:57

2 stops22h 47m

£1,017

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 5/4

17:02-18:45

2 stops17h 43m

Belfast City

Sun 12/4

06:50-17:46

2 stops18h 56m

£1,317

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 16/12

10:47-11:30

2 stops16h 43m

Belfast City

Sat 3/1

11:35-22:14

2 stops18h 39m

£2,498

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 15/4

11:01-13:30

2 stops18h 29m

Belfast City

Thu 16/7

12:40-23:25

2 stops18h 45m

£3,439

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 28/10

13:15-16:50

2 stops20h 35m

£381

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 27/10

13:15-16:50

2 stops20h 35m

£381

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 26/10

13:15-16:50

2 stops20h 35m

£381

Flights are sorted by cheapest return flights first.

Deals found on 19/10

Showing 1-10 of 13 results
1
2

Best time to book a flight from Ontario to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland 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 Northern Ireland

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

Currently, March is the cheapest month in which you can book a flight from Ontario to Northern Ireland (average of £437). Flying from Ontario to Northern Ireland in June is currently the most expensive (average of £691). 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 Northern Ireland. 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 Northern Ireland?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Northern Ireland.

  • How long is the flight from Ontario to Northern Ireland?

    A quick flight from Ontario to Northern Ireland can take about 15h 18m. British Airways provides one of the quickest options available for as low as £658. There are 5095 mi between Ontario and Northern Ireland. This flight may include one or multiple stops.

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

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

  • How can I find direct flights from Ontario to Northern Ireland?

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

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

    Yes. Cheapflights offers flight deals from Ontario to Northern Ireland 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 Northern Ireland?

    Currently, March is the cheapest month in which you can book a flight from Ontario to Northern Ireland (average of £437). Flying from Ontario to Northern Ireland in June is currently the most expensive (average of £691). 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 Northern Ireland

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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 Ontario to Northern Ireland?

Deals for Ontario to Northern Ireland 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 Ontario to Northern Ireland?

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 Northern Ireland.

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

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

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Northern Ireland from Ontario today and book when prices fit your budget.

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