HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Belfast

$976+ Cheap flights from Ontario (ONT) to Belfast

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
Aug 4 — Aug 111
Tue 8/4
Tue 8/11
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 July 5, 2026.

This Priceline deal was found by Cheapflights users on 7/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/12:59 pm
ONT
-
BHD
2 stops17h 51m
British Airways
Tue 11/310:00 am
BHD
-
ONT
2 stops19h 59m
British Airways
Deal found 7/3$976
This British Airways deal was found by Cheapflights users on 7/3. 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.
Tue 9/2212:37 pm
ONT
-
BHD
2 stops18h 43m
British Airways
Fri 10/29:35 am
BHD
-
ONT
2 stops18h 34m
British Airways
Deal found 7/3$1,008
This British Airways deal was found by Cheapflights users on 6/30. 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 11/89:59 am
ONT
-
BHD
2 stops24h 41m
British Airways
Thu 11/129:05 am
BHD
-
ONT
2 stops22h 52m
British Airways
Deal found 6/30$1,116
This Travelocity deal was found by Cheapflights users on 7/4. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/612:33 pm
ONT
-
BHD
2 stops18h 02m
British Airways
Wed 9/1610:05 am
BHD
-
ONT
2 stops18h 02m
British Airways
Deal found 7/4$1,148
This British Airways deal was found by Cheapflights users on 7/3. 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 12/2812:55 pm
ONT
-
BHD
2 stops19h 10m
British Airways
Tue 1/57:25 pm
BHD
-
ONT
2 stops34h 36m
British Airways
Deal found 7/3$1,151
This Priceline deal was found by Cheapflights users on 7/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1612:33 pm
ONT
-
BHD
2 stops18h 02m
British Airways
Mon 8/249:40 am
BHD
-
ONT
2 stops21h 19m
British Airways
Deal found 7/2$1,204
This Priceline deal was found by Cheapflights users on 7/1. 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.
Wed 9/1612:37 pm
ONT
-
BHD
2 stops16h 58m
British Airways
Wed 9/2310:05 am
BHD
-
ONT
2 stops18h 04m
British Airways
Deal found 7/1$1,244
This Justfly.com deal was found by Cheapflights users on 7/3. 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.
Thu 7/2312:35 pm
ONT
-
BHD
2 stops22h 50m
British Airways
Mon 7/277:35 pm
BHD
-
ONT
2 stops34h 59m
British Airways
Deal found 7/3$1,419
This KAYAK deal was found by Cheapflights users on 7/4. 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
3 stops20h 45m
Multiple Airlines
Tue 1/511:25 am
BHD
-
ONT
2 stops18h 49m
Multiple Airlines
Deal found 7/4$1,665

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 July 5, 2026.

Round-trip from

$976
(Priceline)
From Ontario to Belfast
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 July 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

Tue 9/22

12:37 pm-3:20 pm

2 stops18h 43m

Belfast City

Fri 10/2

9:35 am-8:09 pm

2 stops18h 34m

$1,008

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 11/8

9:59 am-6:40 pm

2 stops24h 41m

Belfast City

Thu 11/12

9:05 am-11:57 pm

2 stops22h 52m

$1,116
Quickest round-trip

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 9/6

12:33 pm-2:35 pm

2 stops18h 02m

Belfast City

Wed 9/16

10:05 am-8:07 pm

2 stops18h 02m

$1,148

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Thu 7/23

7:00 am-7:25 pm

2 stops28h 25m

Belfast City

Mon 7/27

7:35 pm-10:34 pm

2 stops34h 59m

$1,419

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 12/28

7:10 am-11:55 am

3 stops20h 45m

Belfast City

Tue 1/5

11:25 am-10:14 pm

2 stops18h 49m

$1,668
Cheapest one-way
Quickest one-way

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 8/28

4:07 pm-6:10 pm

2 stops18h 03m

$1,176

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sat 8/29

12:59 pm-8:30 pm

2 stops23h 31m

$1,217

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Sorted by cheapest first

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 18h 43m. 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

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.