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$349+ 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
Jul 4 — Jul 111
Sat 7/4
Sat 7/11
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 June 4, 2026.

This British Airways deal was found by Cheapflights users on 6/3. 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.
Wed 9/2312:37 pm
ONT
-
BHD
2 stops16h 58m
British Airways
Wed 9/3010:05 am
BHD
-
ONT
2 stops18h 04m
British Airways
Deal found 6/3$1,076
This British Airways deal was found by Cheapflights users on 5/30. 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 10/1912:35 pm
ONT
-
BHD
2 stops18h 55m
British Airways
Fri 10/239:35 am
BHD
-
ONT
2 stops21h 31m
British Airways
Deal found 5/30$1,120
This American Airlines deal was found by Cheapflights users on 6/1. 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 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 6/1$1,129
This British Airways deal was found by Cheapflights users on 5/31. 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 12/2812:55 pm
ONT
-
BHD
2 stops19h 10m
British Airways
Tue 1/56:35 am
BHD
-
ONT
2 stops25h 11m
British Airways
Deal found 5/31$1,154
This Priceline deal was found by Cheapflights users on 6/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2712:37 pm
ONT
-
BHD
2 stops17h 58m
British Airways
Sun 10/111:10 pm
BHD
-
ONT
2 stops18h 43m
British Airways
Deal found 6/1$1,434
This KAYAK deal was found by Cheapflights users on 6/2. 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 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 1/56:20 pm
BHD
-
ONT
3 stops35h 41m
Multiple Airlines
Deal found 6/2$1,495
This British Airways deal was found by Cheapflights users on 6/1. 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.
Fri 12/184:45 pm
ONT
-
BHD
2 stops16h 30m
British Airways
Wed 1/611:25 am
BHD
-
ONT
2 stops19h 24m
British Airways
Deal found 6/1$1,617
This Priceline deal was found by Cheapflights users on 5/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:37 pm
ONT
-
BHD
2 stops16h 58m
British Airways
Sun 9/271:10 pm
BHD
-
ONT
2 stops17h 33m
British Airways
Deal found 5/30$1,685
This KLM deal was found by Cheapflights users on 6/2. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/65:05 pm
ONT
-
BHD
2 stops15h 50m
KLM
Wed 9/169:50 am
BHD
-
ONT
2 stops18h 07m
KLM
Deal found 6/2$1,697
This KLM deal was found by Cheapflights users on 5/31. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/3110:00 pm
ONT
-
BHD
2 stops27h 20m
KLM
Thu 6/49:50 am
BHD
-
ONT
2 stops19h 58m
KLM
Deal found 5/31$1,698

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 June 4, 2026.

Round-trip from

$1,076
(British Airways)

One-way from

$349
(Delta)

Popular in

June

Cheapest in

October

Average price

$1,370
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 ($214 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 4, 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

Wed 9/23

12:37 pm-1:35 pm

2 stops16h 58m

Belfast City

Wed 9/30

10:05 am-8:09 pm

2 stops18h 04m

$1,076

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 10/19

12:35 pm-3:30 pm

2 stops18h 55m

Belfast City

Fri 10/23

6:30 am-11:06 pm

2 stops24h 36m

$1,120

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 9/23

12:37 pm-1:35 pm

2 stops16h 58m

Belfast City

Sun 9/27

1:10 pm-10:43 pm

2 stops17h 33m

$1,685
Quickest round-trip

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 9/6

5:05 pm-4:55 pm

2 stops15h 50m

Belfast City

Wed 9/16

9:50 am-7:57 pm

2 stops18h 07m

$1,697

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 7/15

10:25 am-12:00 pm

2 stops17h 35m

Belfast City

Mon 7/20

11:35 am-11:59 pm

2 stops20h 24m

$2,624

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 7/15

5:10 pm-4:55 pm

2 stops15h 45m

Belfast City

Mon 7/20

9:50 am-10:52 pm

2 stops21h 02m

$3,320

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 6/21

12:41 pm-2:35 pm

2 stops17h 54m

Belfast City

Fri 6/26

9:35 am-7:56 pm

2 stops18h 21m

$4,203

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 6/26

12:41 pm-3:30 pm

2 stops18h 49m

Belfast City

Mon 6/29

9:40 am-7:56 pm

2 stops18h 16m

$4,698
Cheapest one-way

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 9/6

12:55 pm-9:20 am

2 stops36h 25m

$349

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sat 9/5

12:00 pm-9:20 am

2 stops37h 20m

$361

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/31

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

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 15h 50m. Fly via British Airways or KLM 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.

See more FAQs

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