Find flights
When to book
FAQs

Cheap flights from Porto to Sydney from $754

OPO — SYD
1 Oct — 8 Oct1
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

Sat 19/919:55 -
2 stops49h 10m
Sat 3/1014:35 -
2 stops39h 05m
Deal found 31/8$1,657
Sat 19/919:55 -
2 stops49h 10m
Mon 5/1015:35 -
2 stops38h 30m
Deal found 30/8$1,660
Wed 9/907:10 -
3 stops40h 10m
Tue 6/1016:40 -
2 stops34h 35m
Deal found 30/8$1,728
Fri 18/921:25 -
2 stops47h 40m
Thu 1/1014:35 -
2 stops38h 55m
Deal found 28/8$1,942
Sat 19/916:05 -
3 stops35h 30m
Mon 5/1021:35 -
2 stops32h 30m
Deal found 30/8$1,949
Tue 13/1023:35 -
2 stops34h 45m
Mon 19/1012:00 -
2 stops34h 30m
Deal found 29/8$1,951
Sat 19/916:05 -
3 stops35h 30m
Sat 3/1020:50 -
2 stops35h 50m
Deal found 31/8$1,976
Tue 8/914:00 -
2 stops33h 25m
Sat 26/906:00 -
2 stops26h 30m
Deal found 28/8$2,076
Mon 9/1112:15 -
2 stops34h 10m
Mon 30/1112:00 -
2 stops35h 35m
Deal found 29/8$2,095

Find flight deals from Porto to Sydney

Round-trip from

$1,657

One-way from

$754

Popular in

July

Cheapest in

June

Average price

$2,063
British Airways
  • British Airways
  • 19/9-3/10
  • 4 total stops
  • 88h 15m total
  • Porto to Sydney
Search Deals
6/9
  • 6/9
  • 2 total stops
  • 47h 20m total
  • Porto to Sydney
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($187 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($121 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

Sat 19/9

19:55-06:05

2 stops49h 10m

Sydney Kingsford Smith

Sat 3/10

14:35-20:40

2 stops39h 05m

$1,657

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Sat 19/9

19:55-06:05

2 stops49h 10m

Sydney Kingsford Smith

Mon 5/10

15:35-20:05

2 stops38h 30m

$1,660

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Fri 18/9

21:25-06:05

2 stops47h 40m

Sydney Kingsford Smith

Thu 1/10

14:35-20:30

2 stops38h 55m

$1,942

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Wed 11/11

20:40-06:50

2 stops47h 10m

Sydney Kingsford Smith

Sun 15/11

15:50-20:00

2 stops39h 10m

$2,254
Fastest return journey

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Mon 9/11

11:15-07:25

3 stops33h 10m

Sydney Kingsford Smith

Mon 30/11

16:30-15:25

2 stops33h 55m

$2,507

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Sat 12/9

16:50-06:30

2 stops28h 40m

Sydney Kingsford Smith

Mon 28/9

20:45-07:40

2 stops43h 55m

$2,515

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Mon 21/12

08:45-06:50

2 stops35h 05m

Sydney Kingsford Smith

Sun 17/1

15:50-13:55

2 stops33h 05m

$2,563
Cheapest one-way

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Sun 6/9

05:55-14:15

2 stops47h 20m

$754

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Mon 7/9

22:40-06:15

3 stops46h 35m

$803

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Wed 28/10

19:50-18:50

3 stops60h 00m

$808

Flights are sorted by cheapest return flights first.

Deals found on 27/8

Showing 1-10 of 11 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 47h 10m. 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
Katoomba
Lithgow
Cronulla
Terrigal
Leura
Randwick
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.