HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Belfast

$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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
Mar 16 — Mar 231
Mon 3/16
Mon 3/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Belfast with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 February 14, 2026.

This Trip.com deal was found by Cheapflights users on 2/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/195:02 pm
ONT
-
BFS
2 stops22h 18m
Multiple Airlines
Sun 3/299:05 pm
BFS
-
ONT
2 stops27h 17m
Multiple Airlines
Deal found 2/11$849
This oojo deal was found by Cheapflights users on 2/11. 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 3/195:02 pm
ONT
-
BHD
2 stops16h 38m
British Airways
Sun 3/298:10 pm
BHD
-
ONT
2 stops28h 12m
British Airways
Deal found 2/11$924
This oojo deal was found by Cheapflights users on 2/11. 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 2/1210:56 am
ONT
-
BHD
2 stops19h 04m
British Airways
Thu 2/1911:05 am
BHD
-
ONT
2 stops20h 54m
British Airways
Deal found 2/11$984
This oojo deal was found by Cheapflights users on 2/12. 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 2/1910:56 am
ONT
-
BHD
2 stops19h 04m
British Airways
Thu 2/2611:05 am
BHD
-
ONT
2 stops20h 54m
British Airways
Deal found 2/12$985
This British Airways deal was found by Cheapflights users on 2/11. 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 2/256:00 am
ONT
-
BHD
2 stops20h 15m
British Airways
Sun 3/16:30 am
BHD
-
ONT
2 stops23h 59m
British Airways
Deal found 2/11$1,019
This British Airways deal was found by Cheapflights users on 2/12. 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 3/47:00 am
ONT
-
BHD
2 stops19h 15m
British Airways
Sun 3/86:30 am
BHD
-
ONT
2 stops24h 29m
British Airways
Deal found 2/12$1,020
This oojo deal was found by Cheapflights users on 2/11. 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 3/285:02 pm
ONT
-
BHD
2 stops40h 38m
British Airways
Sat 4/410:05 am
BHD
-
ONT
2 stops38h 17m
British Airways
Deal found 2/11$1,050
This KLM deal was found by Cheapflights users on 2/13. 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 4/55:09 pm
ONT
-
BHD
2 stops15h 46m
KLM
Tue 4/219:50 am
BHD
-
ONT
2 stops19h 10m
KLM
Deal found 2/13$1,052
This KAYAK deal was found by Cheapflights users on 2/13. 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.
Tue 5/124:52 pm
ONT
-
BHD
2 stops18h 03m
British Airways
Tue 5/266:30 am
BHD
-
ONT
2 stops25h 29m
British Airways
Deal found 2/13$1,155
This KLM deal was found by Cheapflights users on 2/12. 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.
Thu 3/126:00 am
ONT
-
BHD
2 stops27h 40m
KLM
Fri 3/206:30 am
BHD
-
ONT
2 stops23h 04m
KLM
Deal found 2/12$1,221
This KAYAK deal was found by Cheapflights users on 2/11. 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.
Sat 3/1411:58 pm
ONT
-
BHD
2 stops27h 22m
Multiple Airlines
Fri 3/206:45 am
BHD
-
ONT
2 stops24h 14m
Multiple Airlines
Deal found 2/11$1,248

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 February 14, 2026.

Round-trip from

$849
(Trip.com)

One-way from

$400
(oojo)

Popular in

June

Cheapest in

October

Average price

$685
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 ($218 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 14, 2026.
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 - BFS

ONTBFS

Ontario

Thu 3/19

5:02 pm-10:20 pm

2 stops22h 18m

Belfast Intl

Sun 3/29

9:05 pm-4:22 pm

2 stops27h 17m

$849

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Thu 3/19

5:02 pm-4:40 pm

2 stops16h 38m

Belfast City

Sun 3/29

8:10 pm-4:22 pm

2 stops28h 12m

$924

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 3/4

7:00 am-4:35 pm

2 stops25h 35m

Belfast City

Sun 3/8

10:40 am-11:52 pm

2 stops20h 12m

$1,019

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 2/25

7:00 am-10:15 am

2 stops19h 15m

Belfast City

Sun 3/1

6:30 am-10:29 pm

2 stops23h 59m

$1,019

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sat 3/28

5:02 pm-4:40 pm

2 stops40h 38m

Belfast City

Sat 4/4

10:05 am-4:22 pm

2 stops38h 17m

$1,050

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 4/5

5:09 pm-4:55 pm

2 stops15h 46m

Belfast City

Tue 4/21

9:50 am-9:00 pm

2 stops19h 10m

$1,052

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 5/12

4:52 pm-6:55 pm

2 stops18h 03m

Belfast City

Tue 5/26

6:30 am-11:59 pm

2 stops25h 29m

$1,155

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 3/4

7:00 am-10:15 am

2 stops19h 15m

$400

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 2/23

1:15 pm-4:50 pm

2 stops19h 35m

$429

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 2/24

1:15 pm-4:50 pm

2 stops19h 35m

$429

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/13

Showing 1-10 of 17 results
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

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 16h 38m. 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.