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$371+ 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 7/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
May 11 — May 181
Mon 5/11
Mon 5/18
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 April 11, 2026.

This British Airways deal was found by Cheapflights users on 4/9. 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.
Sat 9/54:54 pm
ONT
-
BHD
2 stops17h 21m
British Airways
Wed 9/1610:05 am
BHD
-
ONT
2 stops19h 03m
British Airways
Deal found 4/9$974
This KAYAK deal was found by Cheapflights users on 4/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/285:05 pm
ONT
-
BHD
2 stops39h 45m
Multiple Airlines
Tue 1/55:20 pm
BHD
-
ONT
2 stops30h 52m
Multiple Airlines
Deal found 4/10$1,026
This oojo deal was found by Cheapflights users on 4/10. 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.
Mon 5/412:19 pm
ONT
-
BHD
2 stops22h 26m
British Airways
Mon 5/117:35 pm
BHD
-
ONT
2 stops28h 47m
British Airways
Deal found 4/10$1,057
This British Airways deal was found by Cheapflights users on 4/10. 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.
Sun 5/104:52 pm
ONT
-
BHD
2 stops17h 53m
British Airways
Mon 5/259:40 am
BHD
-
ONT
2 stops18h 16m
British Airways
Deal found 4/10$1,073
This British Airways deal was found by Cheapflights users on 4/7. 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.
Sun 8/1610:25 am
ONT
-
BHD
2 stops20h 10m
British Airways
Thu 8/206:30 am
BHD
-
ONT
2 stops24h 36m
British Airways
Deal found 4/7$1,096
This British Airways deal was found by Cheapflights users on 4/10. 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.
Mon 12/2812:55 pm
ONT
-
BHD
2 stops21h 40m
British Airways
Tue 1/56:35 am
BHD
-
ONT
2 stops23h 39m
British Airways
Deal found 4/10$1,131
This British Airways deal was found by Cheapflights users on 4/6. 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.
Wed 12/22:56 pm
ONT
-
BHD
2 stops17h 39m
British Airways
Sun 12/66:30 am
BHD
-
ONT
2 stops23h 30m
British Airways
Deal found 4/6$1,147
This British Airways deal was found by Cheapflights users on 4/8. 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.
Tue 5/122:08 pm
ONT
-
BHD
2 stops20h 47m
British Airways
Tue 5/269:40 am
BHD
-
ONT
2 stops18h 16m
British Airways
Deal found 4/8$1,207

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 April 11, 2026.

Round-trip from

$974
(British Airways)

One-way from

$371
(oojo)

Popular in

June

Cheapest in

October
From Ontario to Belfast
Search Deals
One-way flight from Ontario to Belfast
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($233 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($47 potential savings vs. average RT price).
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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 April 11, 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 round-trip

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sat 9/5

4:54 pm-6:15 pm

2 stops17h 21m

Belfast City

Wed 9/16

10:05 am-9:08 pm

2 stops19h 03m

$974
Quickest round-trip

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 5/10

4:52 pm-6:45 pm

2 stops17h 53m

Belfast City

Mon 5/25

9:40 am-7:56 pm

2 stops18h 16m

$1,073

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 8/16

10:25 am-2:35 pm

2 stops20h 10m

Belfast City

Thu 8/20

6:30 am-11:06 pm

2 stops24h 36m

$1,096

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 5/12

2:08 pm-6:55 pm

2 stops20h 47m

Belfast City

Tue 5/26

9:40 am-7:56 pm

2 stops18h 16m

$1,207

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 10/5

4:59 pm-6:45 pm

2 stops17h 46m

Belfast City

Wed 10/28

11:25 am-11:06 pm

2 stops18h 41m

$5,651
Cheapest one-way

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sat 7/25

12:35 pm-3:05 pm

2 stops18h 30m

$371

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 9/13

4:59 pm-6:45 pm

2 stops17h 46m

$3,824
Quickest one-way

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 5/5

2:08 pm-3:20 pm

2 stops17h 12m

$6,523

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/9

Sorted by cheapest first

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 $583). Flying from Ontario to Belfast in June is currently the most expensive (average of $1,344). 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 21m. Fly via British Airways to get the fastest option. The distance from Ontario to 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 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 $583). Flying from Ontario to Belfast in June is currently the most expensive (average of $1,344). 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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