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$400+ Cheap flights from Ontario (ONT) to Belfast

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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap 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 December 4, 2025.

This oojo deal was found by Cheapflights users on 12/2. 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.
Tue 12/910:47 amONT - BHD
2 stops16h 43mBritish Airways
Mon 12/156:35 amBHD - ONT
2 stops21h 04mBritish Airways
Deal found 12/2$849
This oojo deal was found by Cheapflights users on 12/2. 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.
Tue 12/910:47 amONT - BHD
2 stops16h 43mBritish Airways
Sun 12/1412:10 pmBHD - ONT
2 stops19h 45mBritish Airways
Deal found 12/2$960
This oojo deal was found by Cheapflights users on 12/2. 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 12/107:00 amONT - BHD
2 stops19h 15mBritish Airways
Mon 12/156:35 amBHD - ONT
2 stops21h 04mBritish Airways
Deal found 12/2$1,008
This Cheapflightsfares deal was found by Cheapflights users on 12/2. 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.
Tue 12/910:47 amONT - BHD
2 stops16h 43mMultiple Airlines
Tue 12/168:45 amBHD - ONT
2 stops18h 54mMultiple Airlines
Deal found 12/2$1,424
This oojo deal was found by Cheapflights users on 12/3. 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.
Sun 12/214:44 pmONT - BHD
2 stops16h 06mBritish Airways
Tue 1/65:15 pmBHD - ONT
2 stops33h 30mBritish Airways
Deal found 12/3$3,016
This Priceline deal was found by Cheapflights users on 12/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/234:44 pmONT - BHD
2 stops16h 01mBritish Airways
Sun 1/46:30 amBHD - ONT
2 stops22h 28mBritish Airways
Deal found 12/3$3,511
This Priceline deal was found by Cheapflights users on 12/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/234:44 pmONT - BHD
2 stops16h 01mBritish Airways
Sat 1/39:30 amBHD - ONT
2 stops22h 16mBritish Airways
Deal found 12/3$3,553
This Cheapflightsfares deal was found by Cheapflights users on 12/2. 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.
Sat 12/64:47 pmONT - BHD
2 stops15h 58mBritish Airways
Mon 12/811:30 amBHD - ONT
2 stops18h 58mBritish Airways
Deal found 12/2$4,870

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 December 4, 2025.

Round-trip from

$655
(Delta)

One-way from

$400
(oojo)

Popular in

June

Cheapest in

October

Average price

$1,145
From Ontario to Belfast
Search Deals
One-way flight from Ontario to Belfast
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($199 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 4, 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

Wed 1/28

6:00 am-4:50 pm

2 stops26h 50m

Belfast City

Sun 2/1

5:20 pm-12:16 pm

2 stops50h 56m

$655

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 3/27

5:02 pm-5:15 pm

2 stops17h 13m

Belfast City

Sun 4/5

11:00 am-10:07 pm

2 stops19h 07m

$752

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 3/31

11:59 am-4:55 pm

2 stops20h 56m

Belfast City

Mon 4/6

9:50 am-10:34 pm

2 stops20h 44m

$787

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 1/28

7:16 am-4:35 pm

2 stops25h 19m

Belfast City

Sun 2/1

10:40 am-10:13 pm

2 stops19h 33m

$812

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 2/11

10:58 am-4:35 pm

2 stops21h 37m

Belfast City

Sun 2/15

9:10 am-10:04 pm

2 stops20h 54m

$812

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 2/4

6:00 am-4:35 pm

2 stops26h 35m

Belfast City

Sun 2/8

3:10 pm-8:10 pm

2 stops37h 00m

$812

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 3/30

10:56 am-12:55 pm

2 stops17h 59m

Belfast City

Sat 4/4

9:35 am-10:30 pm

2 stops20h 55m

$1,033

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 2/15

6:00 am-4:50 pm

2 stops26h 50m

Belfast City

Thu 2/19

5:20 pm-4:02 pm

2 stops30h 42m

$1,052

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 2/15

2:47 pm-6:40 pm

2 stops19h 53m

Belfast City

Thu 2/19

9:05 am-11:58 pm

2 stops22h 53m

$1,231

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 5/29

1:33 pm-6:15 pm

2 stops20h 42m

Belfast City

Fri 6/5

6:35 am-9:43 pm

2 stops23h 08m

$1,360

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 14 results
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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 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 17h 13m. Fly via Delta 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.

See more FAQs

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