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Cheap flights from Ontario to Belfast from £303

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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
7 Jul — 14 Jul1
1 adult

Cheap 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 2 July 2025.

Round-trip from

£581

One-way from

£303

Popular in

June

Cheapest in

November

Average price

£711
British Airways
  • British Airways
  • 22/7-31/7
  • 4 total stops
  • 47h 28m total
  • Ontario to Belfast
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British Airways
  • British Airways
  • 2/9
  • 2 total stops
  • 18h 31m total
  • Ontario to Belfast
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£88 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£13 potential savings vs. average return price).
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Average for round-trip flights in July 2025
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Find 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 2 July 2025.

Tue 22/716:45ONT - BHD
2 stops16h 45mBritish Airways
Thu 31/719:25BHD - ONT
2 stops30h 43mBritish Airways
Deal found 1/7£581
Sun 3/817:09ONT - BHD
2 stops15h 46mKLM
Tue 19/806:40BHD - ONT
2 stops17h 28mKLM
Deal found 1/7£614

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 2 July 2025.
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 - BHD

ONTBHD

Ontario

Tue 22/7

16:45-17:30

2 stops16h 45m

Belfast City

Thu 31/7

19:25-18:08

2 stops30h 43m

£581

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 3/8

17:09-16:55

2 stops15h 46m

Belfast City

Tue 19/8

06:40-16:08

2 stops17h 28m

£614

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 2/9

16:54-19:25

2 stops18h 31m

£303

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 3/9

16:50-16:55

2 stops16h 05m

£331

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Thu 4/9

14:54-18:45

2 stops19h 51m

£360

Flights are sorted by cheapest return flights first.

Deals found on 30/6

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

What is the cheapest month to book a flight from Ontario to Belfast?

Currently, January is the cheapest month in which you can book a flight from Ontario to Belfast (average of £67). Flying from Ontario to Belfast in July is currently the most expensive (average of £90). 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.

Reviews of airlines servicing Belfast

Get insights into the airlines that provide service to Belfast. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Belfast. Reviews last updated 2 July 2025.
Check out reviews from past customers who have flown with Delta, KLM, andIberia from Ontario to Belfast to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,975 reviews
Check prices

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,975 reviews
Delta
8.0
Very Good
7,975 reviews
Check prices

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,366 reviews
Delta
8.0
Very Good
7,975 reviews
Check prices

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Iberia
7.0
Good
2,818 reviews
Delta
8.0
Very Good
7,975 reviews
Check prices

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
7,089 reviews
Delta
8.0
Very Good
7,975 reviews
Check prices

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines to fly from Ontario to Belfast one-way?

    The cheapet airlines for a one-way flight from Ontario to Belfast are British Airways (£303), Delta (£331), and Iberia (£360).

  • 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.

  • What is the cheapest month to book a flight from Ontario to Belfast?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Belfast (average of £67). Flying from Ontario to Belfast in July is currently the most expensive (average of £90). 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

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Alternative routes for Ontario to Belfast

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

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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.

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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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