Find flights
When to book
FAQs

Cheap flights from Belfast Intl Airport to Sydney from $918

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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SYD
9 Sep — 16 Sep1
1 adult

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 4 September 2025.

Round-trip from

$2,248

One-way from

$918

Popular in

December

Cheapest in

November

Average price

$2,394
16/10-23/10
  • 16/10-23/10
  • 4 total stops
  • 66h 35m total
  • Belfast to Sydney
Search Deals
8/9
  • 8/9
  • 3 total stops
  • 56h 35m total
  • Belfast to Sydney
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($231 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($82 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Belfast Intl to Sydney

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 4 September 2025.

Tue 30/908:15BFS - SYD
2 stops39h 45mMultiple Airlines
Mon 10/1112:00SYD - BFS
2 stops43h 10mMultiple Airlines
Deal found 2/9$2,268
Fri 17/1007:35BFS - SYD
3 stops39h 15mMultiple Airlines
Fri 24/1013:50SYD - BFS
3 stops42h 45mMultiple Airlines
Deal found 1/9$2,536
Thu 16/1006:10BFS - SYD
2 stops28h 15mMultiple Airlines
Thu 23/1019:05SYD - BFS
3 stops38h 54mMultiple Airlines
Deal found 3/9$2,544
Sat 18/1008:20BFS - SYD
3 stops37h 05mMultiple Airlines
Sat 25/1016:00SYD - BFS
2 stops29h 55mMultiple Airlines
Deal found 3/9$2,718

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 647,157 searches. Data last updated 4 September 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

Thu 16/10

06:10-20:25

2 stops28h 15m

Sydney Kingsford Smith

Thu 23/10

11:15-15:35

2 stops38h 20m

$2,248

BelfastSydney

BFS - SYD

BFSSYD

Belfast Intl

Tue 30/9

08:15-09:00

2 stops39h 45m

Sydney Kingsford Smith

Mon 10/11

12:00-20:10

2 stops43h 10m

$2,268

BelfastSydney

BFS - SYD

BFSSYD

Belfast Intl

Fri 17/10

07:35-08:50

3 stops39h 15m

Sydney Kingsford Smith

Fri 24/10

13:50-22:35

3 stops42h 45m

$2,536

BelfastSydney

BFS - SYD

BFSSYD

Belfast Intl

Sat 18/10

08:20-07:25

3 stops37h 05m

Sydney Kingsford Smith

Sat 25/10

16:00-11:55

2 stops29h 55m

$2,718

BelfastSydney

BFS - SYD

BFSSYD

Belfast Intl

Mon 8/9

12:35-06:10

3 stops56h 35m

$918

BelfastSydney

BFS - SYD

BFSSYD

Belfast Intl

Wed 15/10

06:10-08:50

3 stops40h 40m

$952

BelfastSydney

BFS - SYD

BFSSYD

Belfast Intl

Sun 12/10

17:30-21:00

3 stops41h 30m

$1,012

BelfastSydney

BFS - SYD

BFSSYD

Belfast Intl

Fri 17/10

18:40-08:20

3 stops51h 40m

$1,012

BelfastSydney

BFS - SYD

BFSSYD

Belfast Intl

Mon 13/10

13:55-10:45

3 stops58h 50m

$1,024

BelfastSydney

BFS - SYD

BFSSYD

Belfast Intl

Sun 5/10

17:30-21:00

3 stops41h 30m

$1,058

Flights are sorted by cheapest return flights first.

Deals found on 31/8

Showing 1-10 of 16 results
1
2

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, May is the cheapest month in which you can book a flight from Belfast Intl Airport to Sydney (average of $129). Flying from Belfast Intl Airport to Sydney in October is currently the most expensive (average of $171). 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.

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?

    Most people fly into Sydney Kingsford Smith (SYD) if they book a flight to Sydney from Belfast Intl. On average, Kingsford Smith has 0 inbound flights from Belfast Intl per day from 0 airlines. Sydney Kingsford Smith is conveniently located just 7.5 km from Sydney’s city centre.

  • 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, May is the cheapest month in which you can book a flight from Belfast Intl Airport to Sydney (average of $129). Flying from Belfast Intl Airport to Sydney in October is currently the most expensive (average of $171). 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
Parramatta
Wollongong
Katoomba
Penrith
Terrigal
Manly
Lithgow
Randwick
Bondi Beach
Coogee
Cronulla
Leura

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights makes it easy to find Belfast Intl to Sydney flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Belfast Intl to Sydney for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.