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Cheap flights from Belfast Intl Airport to Sydney from £389

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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SYD
14 Nov — 21 Nov1
1 adult
1 adult, Economy

Cheap flight deals from Belfast Intl to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Belfast Intl (BFS) to Sydney (SYD). 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 15 October 2025.

Round-trip from

£903

One-way from

£389

Popular in

December

Cheapest in

October

Average price

£1,076
26/11-3/12
  • 26/11-3/12
  • 4 total stops
  • 81h 25m total
  • Belfast to Sydney
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11/12
  • 11/12
  • 3 total stops
  • 58h 30m total
  • Belfast to Sydney
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£42 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£22 potential savings vs. average return price).
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Average for round-trip flights in October 2025
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Find flight deals from Belfast Intl to Sydney

Enter your travel dates to find the best prices.

Cheapest flights from Belfast Intl to Sydney
Explore the most affordable flight options available from Belfast Intl to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 October 2025.

Mon 17/1107:50BFS - SYD
2 stops35h 45mMultiple Airlines
Tue 2/1214:25SYD - BFS
3 stops32h 55mMultiple Airlines
Deal found 14/10£953
Sat 1/1109:40BFS - SYD
2 stops33h 55mMultiple Airlines
Sat 8/1121:30SYD - BFS
3 stops36h 10mMultiple Airlines
Deal found 13/10£1,211

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast Intl to Sydney 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 15 October 2025.
Use the filters below to find and compare flights from Belfast Intl Airport to Sydney that are best for you.

Fly from

Belfast Intl

Fly to

Sydney

Route

Depart

Return

Price

BelfastSydney

BFS - SYD

BFSSYD

Belfast Intl

Mon 17/11

07:50-06:35

2 stops35h 45m

Sydney Kingsford Smith

Tue 2/12

14:25-12:20

3 stops32h 55m

£953

BelfastSydney

BFS - SYD

BFSSYD

Belfast Intl

Sat 1/11

09:40-06:35

2 stops33h 55m

Sydney Kingsford Smith

Sat 8/11

21:30-22:40

3 stops36h 10m

£1,211

BelfastSydney

BFS - SYD

BFSSYD

Belfast Intl

Thu 11/12

17:10-14:40

3 stops58h 30m

£389

Flights are sorted by cheapest return flights first.

Deals found on 14/10

Best time to book a flight from Belfast Intl to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney 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.

Cheapflights Insights

Everything you need to know about your flight from Belfast Intl Airport to Sydney

What is the cheapest month to book a flight from Belfast Intl Airport to Sydney?

Currently, November is the cheapest month in which you can book a flight from Belfast Intl Airport to Sydney (average of £923). Flying from Belfast Intl Airport to Sydney in August is currently the most expensive (average of £1,198). 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.

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

Find hourly flight availability from Belfast Intl to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 October 2025.

One of the essential ways to save on airfare from Belfast Intl Airport to Sydney is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the evening could potentially save you up to 24% on airfare.

How much does it cost for a return flight from Belfast Intl Airport to Sydney?

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. 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 Sydney. Reviews last updated 15 October 2025.
Check out reviews from past customers who have flown with British Airways from Belfast Intl Airport to Sydney 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.
British Airways
6.7
Okay
7,456 reviews
Check prices

Entertainment

6.4

Boarding

6.9

Overall

6.7

Food

6.3

Crew

7.6

Comfort

6.7

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.
British Airways
6.7
Okay
7,456 reviews
British Airways
6.7
Okay
7,456 reviews
Check prices

Entertainment

6.4

Boarding

6.9

Overall

6.7

Food

6.3

Crew

7.6

Comfort

6.7

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

Related info for your journey

Find useful and relevant information for your journey from Belfast Intl to Sydney. 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 Sydney from Belfast Intl?

    Sydney Kingsford Smith (SYD), located 4.6 mi from the city center, is the airport you fly into when you book flights from Belfast Intl to Sydney. 1 airline have flights to Kingsford Smith from Belfast Intl on a regular basis. Booking flights from Belfast Intl to Sydney Kingsford Smith should not be difficult; the airport handles an average of 0 inbound flights from Belfast Intl per day.

  • What is the cheapest airline to fly from Belfast Intl Airport to Sydney round-trip?

    British Airways, at £1,029, was found to be the cheapest airline from Belfast Intl Airport to Sydney.. British Airways is currently priced 16% below the average price you’ll pay for this route.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast Intl to Sydney 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 Belfast Intl Airport to Sydney?

    Currently, November is the cheapest month in which you can book a flight from Belfast Intl Airport to Sydney (average of £923). Flying from Belfast Intl Airport to Sydney in August is currently the most expensive (average of £1,198). 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

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Bondi Beach
Wollongong
Coogee
Manly

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Alternative routes for Belfast Intl to Sydney

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

Top airline flying from Belfast Intl to Sydney

Discover the top airline that operate flights from Belfast Intl to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 15 October 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£1,029Average£1,193FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Belfast Intl to Sydney?

When you search for this flight from Belfast Intl to Sydney, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

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 Belfast Intl to Sydney.

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

Need flexible booking options for your flight to Sydney from Belfast Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Not ready to book yet? You can track prices for flights from Belfast Intl to Sydney on Cheapflights with our Price Alert feature and get notified when better prices are available.

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