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Cheap flights from Porto to Sydney from $751

OPO — SYD
27 Sep — 4 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

Tue 8/914:00 -
2 stops33h 25m
Tue 29/915:40 -
2 stops28h 55m
Deal found 26/8$1,651
Tue 22/908:35 -
3 stops39h 15m
Tue 29/915:40 -
2 stops35h 55m
Deal found 25/8$1,680
Thu 22/1007:00 -
3 stops37h 55m
Mon 9/1121:30 -
2 stops34h 45m
Deal found 23/8$1,754
Fri 18/906:35 -
3 stops40h 45m
Thu 1/1020:50 -
2 stops34h 15m
Deal found 24/8$1,803
Thu 15/1016:05 -
3 stops42h 15m
Wed 4/1116:50 -
2 stops35h 50m
Deal found 25/8$1,828
Sat 19/913:55 -
2 stops34h 05m
Sat 3/1020:50 -
2 stops32h 25m
Deal found 23/8$1,970
Sat 12/918:05 -
2 stops29h 55m
Mon 28/920:50 -
2 stops32h 15m
Deal found 24/8$2,031

Find flight deals from Porto to Sydney

Round-trip from

$1,651

One-way from

$751

Popular in

July

Cheapest in

June

Average price

$2,414
8/9-29/9
  • 8/9-29/9
  • 4 total stops
  • 62h 20m total
  • Porto to Sydney
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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 ($178 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease ($120 potential savings vs. average return price).
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Average for round-trip flights in August 2026
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Cheapflights Fare Finder

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

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Route

Depart

Return

Price

Cheapest return flight

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Sat 19/9

16:05-12:35

3 stops35h 30m

Sydney Kingsford Smith

Sat 3/10

20:50-23:40

2 stops35h 50m

$1,973

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Fri 18/9

16:45-19:10

2 stops41h 25m

Sydney Kingsford Smith

Thu 1/10

21:05-09:45

2 stops45h 40m

$2,185

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

$2,260

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Tue 22/9

12:10-08:25

3 stops35h 15m

Sydney Kingsford Smith

Tue 29/9

21:45-00:40

3 stops35h 55m

$2,356

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Mon 14/12

11:15-06:30

3 stops32h 15m

Sydney Kingsford Smith

Sat 9/1

13:25-18:15

3 stops39h 50m

$2,368
Fastest return journey

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Thu 1/10

16:25-06:45

2 stops29h 20m

Sydney Kingsford Smith

Wed 14/10

15:45-15:25

2 stops33h 40m

$2,483

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

$2,507

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

$2,571

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Tue 12/1

10:55-07:10

2 stops33h 15m

Sydney Kingsford Smith

Sun 31/1

07:55-15:25

3 stops42h 30m

$2,685
Cheapest one-way

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Sun 6/9

05:55-14:15

2 stops47h 20m

$751

Flights are sorted by cheapest return flights first.

Deals found on 27/8

Showing 1-10 of 15 resultsSorted by cheapest first
1
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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 41h 25m. 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
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

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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.

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