How long is the flight from Ontario to Belfast?

There are many flights that can get you from Ontario to Belfast in 18h. Fly via British Airways to get the fastest option. The distance from Ontario to Belfast is about 5095 mi.

In terms of precipitation, rainfall in Belfast ranges from 2.0 - 3.5 inches per month. October is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Belfast when rainfall is around 2.0 in.

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 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

What is the cheapest time of day to fly from ONT to BFS?

When flying from Ontario to Belfast, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

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.

$575+ Cheap Flights from Ontario to Belfast

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Cheap flight deals from Ontario to Belfast

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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 November 3, 2026.

Mon 12/2811:59 pm -

2 stops26h 51m

Tue 1/56:30 pm -

3 stops59h 45m

Deal found 11/2

$1,364

Best flights from Ontario to Belfast
Discover carefully curated flight deals from Ontario to Belfast that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 3, 2026.

Fri 3/194:25 pm -

2 stops18h 00m

Wed 3/2411:40 am -

2 stops19h 19m

Deal found 11/1

$954

Tue 3/21:44 pm -

2 stops19h 01m

Fri 3/56:45 am -

2 stops25h 14m

Deal found 10/30

$1,139

Mon 4/1912:24 pm -

2 stops23h 01m

Wed 4/218:35 pm -

2 stops35h 11m

Deal found 10/29

$1,144

Fri 1/84:19 pm -

2 stops17h 06m

Sat 5/299:35 am -

2 stops18h 17m

Deal found 10/30

$1,197

Find flight deals from Ontario to Belfast

Round-trip from	$954 (British Airways)
One-way from	$575 (FlightHub)

From Ontario to Belfast

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One-way flight from Ontario to Belfast

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OntarioBelfast

ONT Ontario - BHD Belfast City

ONTBHD

Ontario

Fri 1/8

1:24 pm-5:25 pm

2 stops20h 01m

Belfast City

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$575

OntarioBelfast

ONT Ontario - BHD Belfast City

ONTBHD

Ontario

Fri 3/19

4:25 pm-5:25 pm

2 stops18h 00m

Belfast City

Wed 3/24

11:40 am-11:59 pm

2 stops19h 19m

$954

OntarioBelfast

ONT Ontario - BHD Belfast City

ONTBHD

Ontario

Tue 3/2

1:44 pm-4:45 pm

2 stops19h 01m

Belfast City

Fri 3/5

6:45 am-11:59 pm

2 stops25h 14m

$1,139

OntarioBelfast

ONT Ontario - BHD Belfast City

ONTBHD

Ontario

Mon 4/19

12:24 pm-7:25 pm

2 stops23h 01m

Belfast City

Wed 4/21

8:35 pm-11:46 pm

2 stops35h 11m

$1,144

OntarioBelfast

ONT Ontario - BHD Belfast City

ONTBHD

Ontario

Fri 1/8

7:00 am-8:40 pm

3 stops29h 40m

Belfast City

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$1,181

OntarioBelfast

ONT Ontario - BHD Belfast City

ONTBHD

Ontario

Fri 1/8

4:19 pm-5:25 pm

2 stops17h 06m

Belfast City

Sat 5/29

9:35 am-7:52 pm

2 stops18h 17m

$1,197

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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.

ONT-BF1

ONT-BHD

Estimated round-trip price

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Everything you need to know about your flight from Ontario to Belfast

ONT-BF1

ONT-BHD

No data available for this route at this time. Please check back soon.

Related info for your journey

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. 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.

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$575+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Belfast with Cheapflights

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Cheap flight deals from Ontario to Belfast

Cheapest flights from Ontario to BelfastExplore 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 November 3, 2026.

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 November 3, 2026.

Best flights from Ontario to BelfastDiscover carefully curated flight deals from Ontario to Belfast that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 3, 2026.

Discover carefully curated flight deals from Ontario to Belfast that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 3, 2026.

Last-minute flights from Ontario to BelfastDiscover last-minute flight deals from Ontario to Belfast. Data last updated November 3, 2026 and is based on user searches.

Discover last-minute flight deals from Ontario to Belfast. Data last updated November 3, 2026 and is based on user searches.

One-way flights from Ontario to BelfastSearch for one-way flight options from Ontario to Belfast. Find affordable one-way fares based on user searches. Data last updated November 3, 2026.

Search for one-way flight options from Ontario to Belfast. Find affordable one-way fares based on user searches. Data last updated November 3, 2026.

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Best time to book a flight from Ontario to Belfast

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Related info for your journey

What airport do you fly from for flights from Ontario to Belfast?

How long is the flight from Ontario to Belfast?

Can I find deals for flights from Ontario to Belfast that include hotel bookings?

How can I find direct flights from Ontario to Belfast?

Can I find deals for business class flights from Ontario to Belfast?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Belfast

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Complete your trip

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Search flights from Ontario to Belfast by cabin class

Find flights from Ontario to Belfast, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Ontario and Belfast flights

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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 November 3, 2026.

Best flights from Ontario to Belfast
Discover carefully curated flight deals from Ontario to Belfast that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 3, 2026.

Last-minute flights from Ontario to Belfast
Discover last-minute flight deals from Ontario to Belfast. Data last updated November 3, 2026 and is based on user searches.

One-way flights from Ontario to Belfast
Search for one-way flight options from Ontario to Belfast. Find affordable one-way fares based on user searches. Data last updated November 3, 2026.