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Cheap flights from Porto to Sydney from $779

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 20/9. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — SYD
14 Sep — 21 Sep1
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
Explore the most affordable flight options available from Porto to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2026.

Sun 27/906:35 -
2 stops41h 25m
Thu 15/1012:00 -
2 stops41h 05m
Deal found 13/8$1,847
Sat 5/907:35 -
3 stops40h 25m
Fri 11/911:00 -
3 stops41h 20m
Deal found 14/8$1,899
Mon 7/918:00 -
3 stops38h 10m
Mon 21/914:50 -
3 stops42h 50m
Deal found 12/8$2,025
Fri 11/905:00 -
2 stops29h 25m
Thu 24/920:50 -
2 stops35h 20m
Deal found 12/8$2,028
Tue 29/1219:20 -
2 stops33h 30m
Sun 24/116:50 -
2 stops32h 35m
Deal found 13/8$2,066
Thu 5/1120:05 -
2 stops47h 45m
Mon 9/1115:50 -
2 stops40h 25m
Deal found 10/8$2,073
Sat 7/1108:45 -
2 stops35h 05m
Wed 11/1115:50 -
2 stops40h 25m
Deal found 11/8$2,083

Find flight deals from Porto to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Porto (OPO) 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 August 2026.

Round-trip from

$1,847

One-way from

$779

Popular in

July

Cheapest in

June

Average price

$2,448
27/9-15/10
  • 27/9-15/10
  • 4 total stops
  • 82h 30m total
  • Porto to Sydney
Search Deals
20/9
  • 20/9
  • 3 total stops
  • 55h 25m total
  • Porto to Sydney
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($184 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($124 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Porto 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 15 August 2026.
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 7/11

08:45-06:50

2 stops35h 05m

Sydney Kingsford Smith

Wed 11/11

15:50-21:15

2 stops40h 25m

$2,083

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Mon 21/12

20:40-06:50

2 stops47h 10m

Sydney Kingsford Smith

Sun 17/1

15:50-13:55

2 stops33h 05m

$2,300

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Mon 7/9

11:45-06:05

2 stops33h 20m

Sydney Kingsford Smith

Mon 21/9

14:35-20:05

2 stops38h 30m

$2,396

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Sat 5/9

10:40-06:25

2 stops34h 45m

Sydney Kingsford Smith

Mon 21/9

14:35-20:05

2 stops38h 30m

$2,445

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

$2,585
Fastest return journey

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Tue 12/1

16:10-08:10

3 stops29h 00m

Sydney Kingsford Smith

Sun 31/1

11:45-10:30

3 stops33h 45m

$2,631
Cheapest one-way

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Mon 26/10

19:50-15:05

3 stops56h 15m

$832

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Thu 27/8

18:00-14:15

3 stops59h 15m

$920
Fastest single journey

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Tue 1/9

22:00-17:10

2 stops34h 10m

$1,379

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Tue 1/9

12:35-07:00

2 stops57h 25m

$1,580

Flights are sorted by cheapest return flights first.

Deals found on 13/8

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
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.

Related info for your journey

Find useful and relevant information for your journey from Porto to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Porto to Sydney?

    Departing from Porto to Sydney will take you 35h 05m. Porto and Sydney are separated by a distance of 18057 km.

  • 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
Randwick
Terrigal
Leura
Bondi Beach
Coogee

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Porto to Sydney

See prices for flight routes from nearby airports that may be better suited for you.
Lisbon 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 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.

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