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$432+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
Jun 4 — Jun 111
Thu 6/4
Thu 6/11
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 May 5, 2026.

This Expedia deal was found by Cheapflights users on 5/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/34:47 pm
ONT
-
BHD
2 stops15h 58m
British Airways
Wed 11/1111:25 am
BHD
-
ONT
2 stops18h 58m
British Airways
Deal found 5/2$902
This Justfly.com deal was found by Cheapflights users on 5/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1712:33 pm
ONT
-
BHD
2 stops22h 12m
British Airways
Wed 9/28:35 pm
BHD
-
ONT
2 stops33h 29m
British Airways
Deal found 5/3$922
This British Airways deal was found by Cheapflights users on 5/2. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/294:59 pm
ONT
-
BHD
2 stops16h 41m
British Airways
Tue 11/311:25 am
BHD
-
ONT
2 stops18h 58m
British Airways
Deal found 5/2$979
This oojo deal was found by Cheapflights users on 5/2. 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.
Sat 9/511:59 pm
ONT
-
BHD
2 stops26h 31m
British Airways
Wed 9/1610:05 am
BHD
-
ONT
2 stops19h 03m
British Airways
Deal found 5/2$1,076
This British Airways deal was found by Cheapflights users on 4/30. 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 8/1612:59 pm
ONT
-
BHD
2 stops23h 36m
British Airways
Thu 8/209:35 am
BHD
-
ONT
2 stops21h 23m
British Airways
Deal found 4/30$1,101
This British Airways deal was found by Cheapflights users on 5/3. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/912:55 pm
ONT
-
BHD
2 stops19h 10m
British Airways
Wed 11/117:25 pm
BHD
-
ONT
2 stops34h 34m
British Airways
Deal found 5/3$1,102
This American Airlines deal was found by Cheapflights users on 5/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/284:45 pm
ONT
-
BHD
2 stops17h 50m
American Airlines
Tue 1/511:25 am
BHD
-
ONT
2 stops18h 49m
American Airlines
Deal found 5/4$1,131
This British Airways deal was found by Cheapflights users on 4/30. 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 stops19h 10m
British Airways
Tue 1/511:25 am
BHD
-
ONT
2 stops20h 21m
British Airways
Deal found 4/30$1,155
This KAYAK deal was found by Cheapflights users on 5/4. 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 12/287:10 am
ONT
-
BHD
2 stops19h 30m
Multiple Airlines
Tue 1/57:00 am
BHD
-
ONT
3 stops24h 46m
Multiple Airlines
Deal found 5/4$1,477
This oojo deal was found by Cheapflights users on 5/3. 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.
Thu 7/161:10 pm
ONT
-
BHD
2 stops21h 35m
British Airways
Thu 7/239:35 am
BHD
-
ONT
2 stops18h 24m
British Airways
Deal found 5/3$1,570
This Priceline deal was found by Cheapflights users on 5/4. 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.
Sat 7/412:35 pm
ONT
-
BHD
2 stops18h 30m
British Airways
Wed 7/86:30 am
BHD
-
ONT
2 stops19h 49m
British Airways
Deal found 5/4$1,618

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 May 5, 2026.

Round-trip from

$922
(Justfly.com)

One-way from

$432
(KAYAK)

Popular in

June

Cheapest in

October

Average price

$1,124
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).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 May 5, 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

Mon 8/17

12:33 pm-6:45 pm

2 stops22h 12m

Belfast City

Wed 9/2

8:35 pm-10:04 pm

2 stops33h 29m

$922
Quickest round-trip

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Thu 10/29

4:59 pm-4:40 pm

2 stops16h 41m

Belfast City

Tue 11/3

11:25 am-10:23 pm

2 stops18h 58m

$979

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 8/16

12:59 pm-8:35 pm

2 stops23h 36m

Belfast City

Thu 8/20

9:35 am-10:58 pm

2 stops21h 23m

$1,101

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 9/14

2:22 pm-5:30 pm

2 stops19h 08m

Belfast City

Fri 9/25

6:30 am-5:48 pm

2 stops19h 18m

$1,920

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 5/31

12:40 pm-2:35 pm

2 stops17h 55m

Belfast City

Sun 6/7

1:10 pm-11:56 pm

2 stops18h 46m

$1,926

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 7/15

5:10 pm-4:55 pm

2 stops15h 45m

Belfast City

Wed 7/22

9:50 am-9:50 pm

2 stops20h 00m

$2,777

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 5/22

4:57 pm-4:55 pm

2 stops15h 58m

Belfast City

Sun 5/31

9:50 am-9:48 pm

2 stops19h 58m

$3,249

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 7/15

5:10 pm-4:55 pm

2 stops15h 45m

Belfast City

Fri 7/24

9:50 am-9:50 pm

2 stops20h 00m

$3,580

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 7/17

5:10 pm-4:55 pm

2 stops15h 45m

Belfast City

Wed 7/22

9:50 am-9:50 pm

2 stops20h 00m

$3,872

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Thu 7/16

7:05 am-9:20 am

2 stops18h 15m

Belfast City

Wed 7/22

9:50 am-9:50 pm

2 stops20h 00m

$4,831

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/2

Showing 1-10 of 16 resultsSorted by cheapest first
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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
No data available for this route at this time. Please check back soon.

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 22h 12m. 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.

See more FAQs

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Alternative routes for Ontario to Belfast

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