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Cheap flights from Porto to Sydney from $1,001

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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — SYD
6 Aug — 13 Aug1
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 7 July 2026.

Fri 21/813:40
OPO
-
SYD
2 stops40h 10m
Multiple Airlines
Thu 3/919:40
SYD
-
OPO
2 stops34h 40m
Multiple Airlines
Deal found 5/7$1,609
Fri 21/813:40
OPO
-
SYD
2 stops40h 10m
Multiple Airlines
Fri 28/819:40
SYD
-
OPO
2 stops34h 40m
Multiple Airlines
Deal found 7/7$1,905
Tue 22/916:50
OPO
-
SYD
2 stops28h 45m
Qatar Airways
Tue 6/1015:50
SYD
-
OPO
2 stops34h 20m
Qatar Airways
Deal found 5/7$2,127
Mon 21/1205:00
OPO
-
SYD
2 stops25h 55m
Etihad Airways
Sun 17/116:35
SYD
-
OPO
2 stops37h 45m
Etihad Airways
Deal found 3/7$2,213
Fri 7/820:10
OPO
-
SYD
2 stops59h 40m
Etihad Airways
Thu 20/820:50
SYD
-
OPO
2 stops43h 00m
Etihad Airways
Deal found 5/7$2,242
Thu 3/922:20
OPO
-
SYD
2 stops53h 15m
Multiple Airlines
Wed 9/921:05
SYD
-
OPO
2 stops45h 35m
Multiple Airlines
Deal found 6/7$2,277
Wed 4/1112:25
OPO
-
SYD
2 stops31h 25m
Qatar Airways
Sun 8/1115:50
SYD
-
OPO
2 stops35h 10m
Qatar Airways
Deal found 2/7$2,311

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 7 July 2026.

Round-trip from

$1,609

One-way from

$1,001

Popular in

July

Cheapest in

June

Average price

$2,993
21/8-3/9
  • 21/8-3/9
  • 4 total stops
  • 74h 50m total
  • Porto to Sydney
Search Deals
2/11
  • 2/11
  • 2 total stops
  • 39h 15m total
  • Porto to Sydney
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($123 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($84 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 7 July 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 - SYD

OPOSYD

Porto

Fri 21/8

13:40-06:10

2 stops31h 30m

Sydney Kingsford Smith

Thu 3/9

08:35-19:05

3 stops43h 30m

$2,095

PortoSydney

OPO - SYD

OPOSYD

Porto

Fri 21/8

11:40-14:50

3 stops42h 10m

Sydney Kingsford Smith

Fri 28/8

19:40-07:50

3 stops45h 10m

$2,160

PortoSydney

OPO - SYD

OPOSYD

Porto

Mon 21/12

05:00-17:55

2 stops25h 55m

Sydney Kingsford Smith

Sun 17/1

16:35-19:20

2 stops37h 45m

$2,213
Fastest return journey

PortoSydney

OPO - SYD

OPOSYD

Porto

Wed 4/11

16:40-06:50

2 stops27h 10m

Sydney Kingsford Smith

Sun 8/11

15:50-16:00

2 stops35h 10m

$2,314

PortoSydney

OPO - SYD

OPOSYD

Porto

Fri 4/9

09:00-06:55

2 stops60h 55m

Sydney Kingsford Smith

Wed 9/9

09:30-06:55

2 stops54h 25m

$2,393

PortoSydney

OPO - SYD

OPOSYD

Porto

Sun 16/8

16:40-19:10

2 stops41h 30m

Sydney Kingsford Smith

Sun 23/8

10:05-22:30

3 stops45h 25m

$2,452

PortoSydney

OPO - SYD

OPOSYD

Porto

Tue 1/9

16:20-07:10

3 stops29h 50m

Sydney Kingsford Smith

Wed 9/9

20:30-22:00

2 stops34h 30m

$2,702

PortoSydney

OPO - SYD

OPOSYD

Porto

Sun 19/7

10:45-19:10

2 stops47h 25m

Sydney Kingsford Smith

Thu 23/7

21:05-09:45

2 stops45h 40m

$2,874
Cheapest one-way

PortoSydney

OPO - SYD

OPOSYD

Porto

Mon 2/11

22:05-10:00

3 stops48h 55m

$1,013

PortoSydney

OPO - SYD

OPOSYD

Porto

Mon 20/7

22:40-09:00

2 stops49h 20m

$1,279

Flights are sorted by cheapest return flights first.

Deals found on 6/7

Showing 1-10 of 15 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 25h 55m. 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
Katoomba
Manly
Lithgow
Cronulla
Terrigal
Randwick
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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