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Cheap flights from Ontario to Belfast from £420

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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
30 Aug — 6 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Belfast

Enter your travel dates to find the best prices.

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 31 July 2026.

Sun 25/1016:29
ONT
-
BHD
2 stops17h 21m
British Airways
Sat 14/1111:35
BHD
-
ONT
2 stops19h 22m
British Airways
Deal found 27/7£659
Sun 25/1016:29
ONT
-
BHD
2 stops17h 21m
British Airways
Fri 13/1106:45
BHD
-
ONT
2 stops20h 02m
British Airways
Deal found 27/7£674
Sun 11/1012:43
ONT
-
BHD
2 stops17h 52m
British Airways
Wed 21/1011:35
BHD
-
ONT
2 stops18h 19m
British Airways
Deal found 26/7£711
Tue 29/1209:53
ONT
-
BHD
2 stops22h 52m
British Airways
Wed 6/117:40
BHD
-
ONT
2 stops36h 21m
British Airways
Deal found 28/7£727
Sun 27/912:37
ONT
-
BHD
2 stops17h 58m
British Airways
Thu 8/1020:35
BHD
-
ONT
2 stops32h 36m
British Airways
Deal found 29/7£740
Mon 12/1016:29
ONT
-
BHD
2 stops18h 16m
British Airways
Sat 7/1111:35
BHD
-
ONT
2 stops19h 22m
British Airways
Deal found 26/7£751
Mon 28/914:22
ONT
-
BHD
2 stops20h 23m
British Airways
Thu 8/1012:45
BHD
-
ONT
2 stops17h 09m
British Airways
Deal found 29/7£778
Sun 29/1113:27
ONT
-
BHD
2 stops19h 23m
British Airways
Wed 2/1217:40
BHD
-
ONT
2 stops32h 38m
British Airways
Deal found 28/7£834
Mon 28/1214:42
ONT
-
BHD
2 stops17h 23m
American Airlines
Tue 5/108:45
BHD
-
ONT
2 stops21h 07m
American Airlines
Deal found 27/7£842
Mon 28/1212:55
ONT
-
BHD
2 stops19h 10m
British Airways
Tue 5/119:25
BHD
-
ONT
2 stops34h 36m
British Airways
Deal found 29/7£859

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 31 July 2026.

Round-trip from

£659

One-way from

£420
British Airways
  • British Airways
  • 25/10-14/11
  • 4 total stops
  • 36h 43m total
  • Ontario to Belfast
Search Deals
British Airways
  • British Airways
  • 12/10
  • 2 total stops
  • 18h 16m total
  • Ontario to Belfast
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 31 July 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 return flight

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 29/12

09:53-16:45

2 stops22h 52m

Belfast City

Wed 6/1

17:40-22:01

2 stops36h 21m

£727

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 28/9

14:22-18:45

2 stops20h 23m

Belfast City

Thu 8/10

12:45-21:54

2 stops17h 09m

£778

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 29/11

13:27-16:50

2 stops19h 23m

Belfast City

Wed 2/12

17:40-18:18

2 stops32h 38m

£834

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 28/12

14:42-16:05

2 stops17h 23m

Belfast City

Tue 5/1

08:45-21:52

2 stops21h 07m

£842

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sat 10/10

07:05-09:15

2 stops18h 10m

Belfast City

Wed 21/10

09:50-22:43

2 stops20h 53m

£1,198
Fastest return journey

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 11/10

17:04-16:55

2 stops15h 51m

Belfast City

Sun 8/11

09:40-21:54

2 stops20h 14m

£1,253

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sat 24/10

07:05-10:10

2 stops19h 05m

Belfast City

Fri 13/11

09:40-21:59

2 stops20h 19m

£1,391

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 17/8

07:05-09:20

2 stops18h 15m

Belfast City

Mon 24/8

09:50-21:52

2 stops20h 02m

£1,449
Cheapest one-way

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 12/10

16:29-18:45

2 stops18h 16m

£420
Fastest single journey

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 13/9

08:25-10:30

2 stops18h 05m

£2,388

Flights are sorted by cheapest return flights first.

Deals found on 26/7

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 return 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?

    Departing from Ontario to Belfast will take you 22h 52m. The distance between Ontario and 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 holiday 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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Alternative routes for Ontario to Belfast

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

Fly with Cheapflights

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How does Cheapflights help users find flights from Ontario to Belfast?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Belfast from Ontario today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ontario to Belfast?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ontario to Belfast.

Can Cheapflights find flights from Ontario to Belfast with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Belfast flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ontario to Belfast become cheaper?

Of course! You can now track prices for flights from Ontario to Belfast and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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