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$997+ Cheap flights from Ontario (ONT) to Belfast

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
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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 October 23, 2025.

Round-trip from

$1,004
(American Airlines)

Popular in

June

Cheapest in

October

Average price

$633
From Ontario to Belfast
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($212 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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Find flight deals from Ontario to Belfast

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 October 23, 2025.

This British Airways deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/54:47 pmONT - BHD
2 stops16h 28mBritish Airways
Fri 12/1211:30 amBHD - ONT
2 stops18h 58mBritish Airways
Deal found 10/21$1,062
This oojo deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2210:57 amONT - BHD
2 stops16h 58mBritish Airways
Fri 10/2411:55 amBHD - ONT
2 stops19h 56mBritish Airways
Deal found 10/21$1,392
This KLM deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/224:35 pmONT - BHD
2 stops16h 20mKLM
Fri 10/246:30 amBHD - ONT
2 stops18h 40mKLM
Deal found 10/20$1,778
This Cheapflightsfares deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/154:47 pmONT - BHD
2 stops15h 18mBritish Airways
Mon 1/511:30 amBHD - ONT
2 stops18h 44mBritish Airways
Deal found 10/20$2,552

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated October 23, 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 4/3

5:02 pm-8:45 pm

2 stops19h 43m

Belfast City

Tue 4/7

9:35 am-11:40 pm

2 stops22h 05m

$1,004

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 12/5

4:47 pm-5:15 pm

2 stops16h 28m

Belfast City

Fri 12/12

11:30 am-10:28 pm

2 stops18h 58m

$1,062

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 12/15

4:47 pm-4:05 pm

2 stops15h 18m

Belfast City

Mon 1/5

11:30 am-10:14 pm

2 stops18h 44m

$2,552

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

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 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 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 $586). Flying from Ontario to Belfast in June is currently the most expensive (average of $927). 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?

    There are many flights that can get you from Ontario to Belfast in 16h 28m. Fly via American Airlines or British Airways to get the fastest option. The distance from Ontario to Belfast is about 5095 mi. This flight may include one or multiple 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 vacation 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 $586). Flying from Ontario to Belfast in June is currently the most expensive (average of $927). 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.

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