HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Belfast

$367+ 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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
Jun 28 — Jul 51
Sun 6/28
Sun 7/5
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 May 29, 2026.

This American Airlines deal was found by Cheapflights users on 5/28. 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 8/182:27 pm
ONT
-
BHD
2 stops20h 28m
American Airlines
Tue 9/16:30 am
BHD
-
ONT
2 stops20h 17m
American Airlines
Deal found 5/28$953
This FlightHub deal was found by Cheapflights users on 5/28. 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 8/177:06 am
ONT
-
BHD
2 stops24h 24m
British Airways
Wed 9/210:05 am
BHD
-
ONT
2 stops20h 53m
British Airways
Deal found 5/28$967
This FlightHub deal was found by Cheapflights users on 5/28. 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.
Wed 8/1912:33 pm
ONT
-
BHD
2 stops17h 02m
British Airways
Mon 8/317:35 pm
BHD
-
ONT
2 stops33h 37m
British Airways
Deal found 5/28$983
This FlightHub deal was found by Cheapflights users on 5/27. 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.
Fri 10/164:59 pm
ONT
-
BHD
2 stops19h 36m
British Airways
Fri 10/239:35 am
BHD
-
ONT
2 stops21h 31m
British Airways
Deal found 5/27$988
This FlightHub deal was found by Cheapflights users on 5/28. 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 8/1710:29 am
ONT
-
BHD
2 stops21h 01m
British Airways
Mon 8/316:30 am
BHD
-
ONT
2 stops24h 28m
British Airways
Deal found 5/28$1,084
This British Airways deal was found by Cheapflights users on 5/26. 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 10/1711:59 pm
ONT
-
BHD
2 stops33h 41m
British Airways
Wed 10/2110:05 am
BHD
-
ONT
2 stops19h 03m
British Airways
Deal found 5/26$1,127
This British Airways deal was found by Cheapflights users on 5/27. 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 10/191:31 pm
ONT
-
BHD
2 stops35h 29m
British Airways
Fri 10/239:35 am
BHD
-
ONT
2 stops21h 31m
British Airways
Deal found 5/27$1,132
This British Airways deal was found by Cheapflights users on 5/29. 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 1/510:00 am
BHD
-
ONT
2 stops21h 46m
British Airways
Deal found 5/29$1,154
This British Airways deal was found by Cheapflights users on 5/26. 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 8/197:06 am
ONT
-
BHD
2 stops22h 29m
British Airways
Sun 8/236:30 am
BHD
-
ONT
2 stops24h 28m
British Airways
Deal found 5/26$1,224

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 29, 2026.

Round-trip from

$953
(American Airlines)

One-way from

$367
(oojo)

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. 18% potential increase in price ($218 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($44 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 29, 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

Tue 8/18

2:27 pm-6:55 pm

2 stops20h 28m

Belfast City

Tue 9/1

6:30 am-6:47 pm

2 stops20h 17m

$953

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 8/18

10:29 am-5:35 pm

2 stops23h 06m

Belfast City

Wed 9/2

6:30 am-9:12 pm

2 stops22h 42m

$967

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 8/17

10:29 am-3:30 pm

2 stops21h 01m

Belfast City

Mon 8/31

6:30 am-10:58 pm

2 stops24h 28m

$1,084

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sat 10/17

11:59 pm-5:40 pm

2 stops33h 41m

Belfast City

Wed 10/21

10:05 am-9:08 pm

2 stops19h 03m

$1,127

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 10/19

2:22 pm-9:00 am

2 stops34h 38m

Belfast City

Fri 10/23

6:30 am-11:06 pm

2 stops24h 36m

$1,132

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 8/19

7:06 am-1:35 pm

2 stops22h 29m

Belfast City

Sun 8/23

6:30 am-10:58 pm

2 stops24h 28m

$1,224
Quickest round-trip

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Thu 10/8

4:59 pm-6:45 pm

2 stops17h 46m

Belfast City

Sun 10/18

1:10 pm-11:53 pm

2 stops18h 43m

$1,326
Cheapest one-way
Quickest one-way

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sat 10/24

4:59 pm-5:45 pm

2 stops16h 46m

$367

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Thu 9/10

2:22 pm-6:45 pm

2 stops20h 23m

$501

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 6/24

12:37 pm-1:35 pm

2 stops16h 58m

$892

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/28

Showing 1-10 of 11 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 20h 28m. Fly via American Airlines or British Airways 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

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.

Alternative routes for Ontario to Belfast

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Belfast Intl flights
San Francisco to Belfast Intl flights

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.
Site
©2026 Cheapflights