Find flights
When to book
FAQs

Cheap flights from Porto to Sydney from $944

OPO — SYD
28 Oct — 4 Nov1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Porto to Sydney

Enter your travel dates to find the best prices.

Cheapest flights from Porto to Sydney

Mon 2/1117:35 -
2 stops51h 20m
Sun 22/1116:20 -
2 stops35h 25m
Deal found 24/9$1,620
Thu 5/1110:55 -
2 stops69h 30m
Thu 19/1121:35 -
2 stops52h 50m
Deal found 24/9$1,621
Fri 6/1116:25 -
2 stops40h 00m
Thu 19/1121:35 -
2 stops28h 50m
Deal found 25/9$1,622
Tue 10/1116:10 -
2 stops40h 15m
Tue 17/1121:35 -
2 stops28h 50m
Deal found 26/9$1,641
Sat 21/1110:55 -
2 stops69h 30m
Sat 5/1221:35 -
2 stops28h 50m
Deal found 28/9$1,648
Thu 12/1116:25 -
2 stops40h 00m
Thu 19/1121:35 -
2 stops28h 50m
Deal found 28/9$1,649
Sun 1/1110:55 -
2 stops45h 30m
Tue 24/1121:35 -
2 stops28h 50m
Deal found 24/9$1,659
Wed 11/1116:25 -
2 stops64h 00m
Sun 15/1121:35 -
2 stops28h 50m
Deal found 24/9$1,704

Find flight deals from Porto to Sydney

Round-trip from

$1,620

One-way from

$944

Popular in

July

Cheapest in

September

Average price

$2,101
British Airways
  • British Airways
  • 2/11-22/11
  • 4 total stops
  • 86h 45m total
  • Porto to Sydney
Search Deals
26/10-31/12
  • 26/10-31/12
  • 3 total stops
  • 54h 25m total
  • Porto to Sydney
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($639 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($142 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Porto to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Mon 26/10

19:55-13:20

3 stops54h 25m

Sydney Kingsford Smith

Wed 31/12

00:00-15:00

Nonstop0h 00m

$944

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Wed 14/10

20:15-12:45

3 stops54h 30m

Sydney Kingsford Smith

Wed 31/12

00:00-15:00

Nonstop0h 00m

$977

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Mon 2/11

17:35-07:55

2 stops51h 20m

Sydney Kingsford Smith

Thu 26/11

16:20-17:15

2 stops35h 55m

$1,620

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Sat 21/11

10:55-19:25

2 stops69h 30m

Sydney Kingsford Smith

Sat 5/12

21:35-09:55

2 stops47h 20m

$1,634

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Thu 5/11

16:25-19:25

2 stops40h 00m

Sydney Kingsford Smith

Thu 19/11

21:35-15:25

2 stops28h 50m

$1,644

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Tue 12/1

16:10-19:25

2 stops40h 15m

Sydney Kingsford Smith

Sun 31/1

21:35-15:25

2 stops28h 50m

$1,655

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Wed 11/11

16:25-19:25

2 stops64h 00m

Sydney Kingsford Smith

Sun 15/11

21:35-15:25

2 stops28h 50m

$1,705
Fastest return journey

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Mon 12/10

06:00-13:15

2 stops45h 15m

Sydney Kingsford Smith

Wed 31/12

00:00-15:00

Nonstop0h 00m

$2,115

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Sat 9/1

16:25-06:30

3 stops51h 05m

Sydney Kingsford Smith

Sat 23/1

21:35-09:55

2 stops47h 20m

$2,117

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Tue 12/1

16:10-19:25

2 stops40h 15m

Sydney Kingsford Smith

Sun 31/1

07:55-15:25

3 stops42h 30m

$2,184

Flights are sorted by cheapest return flights first.

Deals found on 25/9

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

Best time to book a flight from Porto to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Porto with our price prediction graph.
Estimated return price

Related info for your journey

  • How long is the flight from Porto to Sydney?

    Departing from Porto to Sydney will take you 51h 20m. Porto and Sydney are separated by a distance of 18057 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

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

  • How can I find direct flights from Porto to Sydney?

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

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

    Yes. Cheapflights offers flight deals from Porto 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.

See more FAQs

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Penrith
Manly
Lithgow
Cronulla
Terrigal
Katoomba
Randwick
Leura
Bondi Beach
Coogee

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Porto to Sydney

Lisbon to Sydney flights

Fly with Cheapflights

How does Cheapflights help users find flights from Porto to Sydney?

Deals for Porto to Sydney flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Porto to Sydney for you. Better yet — we are completely free to use.

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

Need flexible booking options for your flight to Sydney from Porto? 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 Porto to Sydney become cheaper?

Yes, Cheapflights offers price alerts on Porto to Sydney 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.

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.