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$321+ 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 7/27. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
May 3 — May 101
Sun 5/3
Sun 5/10
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 April 3, 2026.

This American Airlines deal was found by Cheapflights users on 4/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/172:22 pm
ONT
-
BHD
2 stops17h 08m
Multiple Airlines
Wed 9/211:35 am
BHD
-
ONT
2 stops19h 49m
Multiple Airlines
Deal found 4/2$894
This American Airlines deal was found by Cheapflights users on 3/31. 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.
Tue 9/12:22 pm
ONT
-
BHD
2 stops16h 58m
American Airlines
Tue 9/156:30 am
BHD
-
ONT
2 stops19h 18m
American Airlines
Deal found 3/31$895
This FlightHub deal was found by Cheapflights users on 4/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:54 pm
ONT
-
BHD
2 stops17h 51m
British Airways
Tue 9/18:25 pm
BHD
-
ONT
2 stops34h 41m
British Airways
Deal found 4/2$908
This FlightHub deal was found by Cheapflights users on 4/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/161:00 pm
ONT
-
BHD
2 stops23h 35m
British Airways
Wed 9/26:30 am
BHD
-
ONT
2 stops22h 38m
British Airways
Deal found 4/2$935
This FlightHub deal was found by Cheapflights users on 4/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/171:00 pm
ONT
-
BHD
2 stops23h 35m
British Airways
Mon 8/319:40 am
BHD
-
ONT
2 stops21h 26m
British Airways
Deal found 4/2$958
This American Airlines deal was found by Cheapflights users on 3/31. 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.
Sat 9/52:22 pm
ONT
-
BHD
2 stops16h 43m
Multiple Airlines
Wed 9/1611:35 am
BHD
-
ONT
2 stops18h 02m
Multiple Airlines
Deal found 3/31$973
This British Airways deal was found by Cheapflights users on 4/1. 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 4/1$974
This British Airways deal was found by Cheapflights users on 4/2. 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.
Sun 8/167:20 am
ONT
-
BHD
2 stops26h 20m
British Airways
Thu 8/209:35 am
BHD
-
ONT
2 stops21h 31m
British Airways
Deal found 4/2$1,096
This British Airways deal was found by Cheapflights users on 3/31. 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 11/22:59 pm
ONT
-
BHD
2 stops19h 36m
British Airways
Fri 11/66:45 am
BHD
-
ONT
2 stops23h 38m
British Airways
Deal found 3/31$1,097
This oojo deal was found by Cheapflights users on 3/31. 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 9/14:54 pm
ONT
-
BHD
2 stops18h 46m
British Airways
Tue 9/158:25 pm
BHD
-
ONT
2 stops30h 32m
British Airways
Deal found 3/31$1,098
This British Airways deal was found by Cheapflights users on 4/1. 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 11/711:59 pm
ONT
-
BHD
2 stops32h 51m
British Airways
Tue 11/105:15 pm
BHD
-
ONT
2 stops37h 08m
British Airways
Deal found 4/1$1,103

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 3, 2026.

Round-trip from

$894
(American Airlines)

One-way from

$321
(oojo)

Popular in

June

Cheapest in

August

Average price

$781
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 ($216 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 3, 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

4:54 pm-6:45 pm

2 stops17h 51m

Belfast City

Tue 9/1

8:25 pm-11:06 pm

2 stops34h 41m

$908

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 8/17

1:00 pm-8:35 pm

2 stops23h 35m

Belfast City

Mon 8/31

9:40 am-11:06 pm

2 stops21h 26m

$958

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 8/19

1:00 pm-6:45 pm

2 stops21h 45m

Belfast City

Mon 8/31

6:30 am-9:08 pm

2 stops22h 38m

$958
Quickest 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

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 8/16

7:20 am-5:40 pm

2 stops26h 20m

Belfast City

Thu 8/20

9:35 am-11:06 pm

2 stops21h 31m

$1,096

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 8/18

1:00 pm-5:35 pm

2 stops20h 35m

Belfast City

Tue 9/1

1:45 pm-11:24 pm

2 stops17h 39m

$1,215

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 5/12

2:08 pm-5:35 pm

2 stops19h 27m

Belfast City

Tue 5/26

9:40 am-7:56 pm

2 stops18h 16m

$1,226

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sat 6/13

11:59 pm-5:40 pm

2 stops33h 41m

Belfast City

Mon 6/29

7:35 pm-11:59 pm

2 stops36h 24m

$1,522

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 6/9

7:00 am-5:35 pm

2 stops26h 35m

Belfast City

Sun 6/28

8:10 pm-7:56 pm

2 stops31h 46m

$1,583

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 6/9

7:00 am-3:20 pm

2 stops24h 20m

Belfast City

Wed 6/24

8:35 pm-7:56 pm

2 stops31h 21m

$1,586

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/29

Showing 1-10 of 15 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

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 $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 51m. 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 $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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