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Cheap flights from Belfast Intl Airport to Ontario from £629

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — ONT
1 May — 8 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast Intl to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Belfast Intl to Ontario
Explore the most affordable flight options available from Belfast Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 April 2026.

Tue 2/610:35
BFS
-
ONT
2 stops37h 42m
Multiple Airlines
Tue 9/617:59
ONT
-
BFS
2 stops21h 11m
Multiple Airlines
Deal found 29/3£629

Find flight deals from Belfast Intl to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Belfast Intl (BFS) to Ontario (ONT). 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 1 April 2026.

Round-trip from

£629

Popular in

December

Cheapest in

June

Average price

£765
2/6-9/6
  • 2/6-9/6
  • 4 total stops
  • 58h 53m total
  • Belfast to Ontario
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£99 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast Intl to Ontario 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 1 April 2026.
Use the filters below to find and compare flights from Belfast Intl Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

BelfastOntario

BFS - ONT

BFSONT

Belfast Intl

Tue 2/6

10:35-16:17

2 stops37h 42m

Ontario

Tue 9/6

17:59-23:10

2 stops21h 11m

£629

Flights are sorted by cheapest return flights first.

Deals found on 29/3

Sorted by cheapest first

Best time to book a flight from Belfast Intl to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Belfast Intl 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.

Related info for your journey

Find useful and relevant information for your journey from Belfast Intl to Ontario. 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 into for flights to Ontario from Belfast Intl?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Belfast Intl. On average, Ontario has 0 inbound flights from Belfast Intl per day from 0 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

    Yes. In addition to deals on Belfast Intl to Ontario flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Belfast Intl to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast Intl to Ontario.

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

    Yes. Cheapflights offers flight deals from Belfast Intl to Ontario 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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How does Cheapflights help users find flights from Belfast Intl to Ontario?

Cheapflights helps you search for flights from Belfast Intl to Ontario via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from Belfast Intl.

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

Certainly. Search results for flights to Ontario from Belfast Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights offers price alerts on Belfast Intl to Ontario flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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