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Cheap flights from Porto to Sydney from $1,770

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/2. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — SYD
1 Mar — 8 Mar1
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 30 January 2026.

Sat 28/214:05
OPO
-
SYD
2 stops33h 15m
Multiple Airlines
Fri 13/312:30
SYD
-
OPO
2 stops35h 55m
Multiple Airlines
Deal found 29/1$1,770
Sat 14/314:45
OPO
-
SYD
2 stops32h 15m
Multiple Airlines
Sat 21/321:30
SYD
-
OPO
2 stops35h 40m
Multiple Airlines
Deal found 28/1$1,871
Tue 10/217:35
OPO
-
SYD
3 stops29h 20m
Multiple Airlines
Sat 14/209:40
SYD
-
OPO
3 stops47h 30m
Multiple Airlines
Deal found 28/1$1,968
Sat 28/318:50
OPO
-
SYD
2 stops36h 00m
Multiple Airlines
Mon 13/413:00
SYD
-
OPO
3 stops43h 55m
Multiple Airlines
Deal found 29/1$1,976
Sat 28/219:50
OPO
-
SYD
2 stops48h 05m
British Airways
Fri 13/316:20
SYD
-
OPO
2 stops37h 40m
British Airways
Deal found 28/1$2,006
Thu 26/216:05
OPO
-
SYD
3 stops33h 15m
Multiple Airlines
Thu 5/321:30
SYD
-
OPO
2 stops34h 50m
Multiple Airlines
Deal found 29/1$2,087

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 30 January 2026.

Round-trip from

$1,770

Popular in

April

Cheapest in

February

Average price

$2,300
28/2-13/3
  • 28/2-13/3
  • 4 total stops
  • 69h 10m total
  • Porto to Sydney
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($67 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($66 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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 30 January 2026.
Use the filters below to find and compare flights from Porto to Sydney that are best for you.

Fly from

Porto

Fly to

Sydney

Route

Depart

Return

Price

PortoSydney

OPO - SYD

OPOSYD

Porto

Sat 28/2

14:05-10:20

2 stops33h 15m

Sydney Kingsford Smith

Fri 13/3

12:30-13:25

2 stops35h 55m

$1,770

PortoSydney

OPO - SYD

OPOSYD

Porto

Tue 10/2

17:35-09:55

3 stops29h 20m

Sydney Kingsford Smith

Sat 14/2

09:40-22:10

3 stops47h 30m

$1,968

PortoSydney

OPO - SYD

OPOSYD

Porto

Sat 28/3

18:50-17:50

2 stops36h 00m

Sydney Kingsford Smith

Mon 13/4

13:00-23:55

3 stops43h 55m

$1,976

PortoSydney

OPO - SYD

OPOSYD

Porto

Sat 28/2

19:50-06:55

2 stops48h 05m

Sydney Kingsford Smith

Fri 13/3

16:20-19:00

2 stops37h 40m

$2,013

PortoSydney

OPO - SYD

OPOSYD

Porto

Thu 26/2

16:05-12:20

3 stops33h 15m

Sydney Kingsford Smith

Thu 5/3

13:35-19:25

3 stops40h 50m

$2,128

PortoSydney

OPO - SYD

OPOSYD

Porto

Wed 4/3

12:35-09:15

2 stops33h 40m

Sydney Kingsford Smith

Sun 8/3

10:20-09:30

2 stops34h 10m

$2,144

PortoSydney

OPO - SYD

OPOSYD

Porto

Mon 30/3

12:35-08:00

2 stops33h 25m

Sydney Kingsford Smith

Tue 14/4

09:30-09:45

2 stops33h 15m

$2,151

PortoSydney

OPO - SYD

OPOSYD

Porto

Thu 26/3

12:35-09:05

2 stops33h 30m

Sydney Kingsford Smith

Tue 14/4

09:30-09:45

2 stops33h 15m

$2,151

PortoSydney

OPO - SYD

OPOSYD

Porto

Sun 29/3

12:35-08:00

2 stops33h 25m

Sydney Kingsford Smith

Fri 10/4

09:30-09:45

2 stops33h 15m

$2,151

PortoSydney

OPO - SYD

OPOSYD

Porto

Mon 30/3

12:35-08:00

2 stops33h 25m

Sydney Kingsford Smith

Fri 10/4

09:30-09:45

2 stops33h 15m

$2,151

Flights are sorted by cheapest return flights first.

Deals found on 29/1

Showing 1-10 of 11 results
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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
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.

Cheapflights Insights

Everything you need to know about your flight from Porto to Sydney

What is the cheapest month to book a flight from Porto to Sydney?

Currently, December is the cheapest month in which you can book a flight from Porto to Sydney (average of $1,736). Flying from Porto to Sydney in April is currently the most expensive (average of $2,684). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 48h 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.

  • What is the cheapest month to book a flight from Porto to Sydney?

    Currently, December is the cheapest month in which you can book a flight from Porto to Sydney (average of $1,736). Flying from Porto to Sydney in April is currently the most expensive (average of $2,684). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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
Terrigal
Lithgow
Leura
Coogee
Cronulla
Randwick
Bondi Beach

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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