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Cheap flights from Ontario to Belfast from £418

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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHD
18 Jun — 25 Jun1
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 13 June 2025.

Round-trip from

£732

One-way from

£418

Popular in

June

Cheapest in

November

Average price

£804
American Airlines
  • American Airlines
  • 3/8-18/8
  • 4 total stops
  • 38h 47m total
  • Ontario to Belfast
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British Airways
  • British Airways
  • 6/7
  • 2 total stops
  • 17h 54m total
  • Ontario to Belfast
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£89 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£14 potential savings vs. average return price).
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Average for round-trip flights in June 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 13 June 2025.

Sun 3/814:37ONT - BHD
2 stops19h 03mAmerican Airlines
Mon 18/806:40BHD - ONT
2 stops19h 44mAmerican Airlines
Deal found 11/6£732
Sun 3/817:09ONT - BHD
2 stops15h 46mKLM
Mon 18/806:30BHD - ONT
2 stops17h 38mKLM
Deal found 11/6£1,166
Thu 12/610:54ONT - BHD
2 stops18h 21mBritish Airways
Thu 19/612:40BHD - ONT
2 stops16h 58mBritish Airways
Deal found 11/6£1,329

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 13 June 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

Sun 3/8

14:37-17:40

2 stops19h 03m

Belfast City

Mon 18/8

06:40-18:24

2 stops19h 44m

£732

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 3/8

17:09-16:55

2 stops15h 46m

Belfast City

Mon 18/8

06:30-16:08

2 stops17h 38m

£1,166

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Thu 26/6

08:15-09:20

2 stops17h 05m

Belfast City

Mon 30/6

09:50-21:38

2 stops19h 48m

£1,643

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 6/7

12:46-14:40

2 stops17h 54m

£418

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 8/7

14:37-17:30

2 stops18h 53m

£481

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 18/6

17:08-16:55

2 stops15h 47m

£1,814

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 7/7

14:37-15:40

2 stops17h 03m

£5,121

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 6/7

08:15-11:30

2 stops19h 15m

£6,023

Flights are sorted by cheapest return flights first.

Deals found on 12/6

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.

Rainfall in Belfast by month

Plan your trip to Belfast by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Belfast ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast when rainfall is around 50.0 mm.

Temperature in Belfast by month

Plan your trip to Belfast by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Belfast, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

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 13 June 2025.
KLM
7.8
Good
1,358 reviews
Check prices

Crew

8.4

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.2

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
KLM
7.8
Good
1,358 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Crew

8.4

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.2

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
American Airlines
7.2
Good
10,000 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Crew

8.4

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.2

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Iberia
7.0
Good
2,776 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Crew

8.4

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.2

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
British Airways
6.6
Okay
7,011 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Crew

8.4

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.2

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.

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 (£418), American Airlines (£481), and KLM (£1,814).

  • 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

See prices for flight routes from nearby airports that may be better suited for you.
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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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