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Cheap flights from Porto to Sydney from $1,730

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/11. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — SYD
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheap 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 18 September 2025.

Round-trip from

$1,730

Popular in

April

Cheapest in

January

Average price

$2,284
Turkish Airlines
  • Turkish Airlines
  • 6/11-19/11
  • 4 total stops
  • 63h 45m total
  • Porto to Sydney
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($73 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease ($68 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from Porto to Sydney

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 18 September 2025.

Thu 6/1116:10OPO - SYD
2 stops31h 35mTurkish Airlines
Wed 19/1112:45SYD - OPO
2 stops32h 10mTurkish Airlines
Deal found 17/9$1,730
Mon 27/1014:40OPO - SYD
2 stops31h 45mMultiple Airlines
Sun 9/1120:05SYD - OPO
3 stops38h 40mMultiple Airlines
Deal found 17/9$1,800
Sat 1/1106:20OPO - SYD
3 stops42h 40mMultiple Airlines
Sat 8/1114:20SYD - OPO
3 stops41h 20mMultiple Airlines
Deal found 17/9$1,872
Mon 27/1010:55OPO - SYD
2 stops36h 50mTurkish Airlines
Sun 9/1112:45SYD - OPO
2 stops37h 25mTurkish Airlines
Deal found 17/9$1,985
Thu 30/1015:10OPO - SYD
3 stops31h 05mMultiple Airlines
Wed 12/1116:35SYD - OPO
2 stops34h 45mMultiple Airlines
Deal found 16/9$2,006
Thu 30/1010:55OPO - SYD
2 stops36h 50mTurkish Airlines
Wed 12/1112:45SYD - OPO
2 stops32h 10mTurkish Airlines
Deal found 16/9$2,018
Thu 6/1106:10OPO - SYD
2 stops46h 20mMultiple Airlines
Wed 19/1121:15SYD - OPO
2 stops28h 55mMultiple Airlines
Deal found 17/9$2,087
Sat 1/1116:10OPO - SYD
2 stops55h 10mTurkish Airlines
Sat 8/1112:45SYD - OPO
2 stops32h 10mTurkish Airlines
Deal found 17/9$2,096
Thu 30/1012:35OPO - SYD
2 stops33h 30mUnited Airlines
Wed 12/1111:20SYD - OPO
2 stops33h 10mUnited Airlines
Deal found 16/9$2,224
Thu 6/1112:35OPO - SYD
2 stops33h 30mUnited Airlines
Wed 19/1111:20SYD - OPO
2 stops33h 10mUnited Airlines
Deal found 17/9$2,238

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 18 September 2025.
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

Thu 30/10

15:10-09:15

3 stops31h 05m

Sydney Kingsford Smith

Wed 12/11

16:35-16:20

2 stops34h 45m

$2,006

PortoSydney

OPO - SYD

OPOSYD

Porto

Thu 30/10

10:55-10:45

2 stops36h 50m

Sydney Kingsford Smith

Wed 12/11

12:45-09:55

2 stops32h 10m

$2,018

PortoSydney

OPO - SYD

OPOSYD

Porto

Tue 6/1

10:55-19:20

2 stops45h 25m

Sydney Kingsford Smith

Sat 24/1

12:45-09:55

2 stops32h 10m

$2,196

PortoSydney

OPO - SYD

OPOSYD

Porto

Wed 7/1

10:55-19:20

2 stops45h 25m

Sydney Kingsford Smith

Sat 24/1

12:45-15:10

2 stops37h 25m

$2,196

PortoSydney

OPO - SYD

OPOSYD

Porto

Thu 12/3

12:35-09:05

2 stops57h 30m

Sydney Kingsford Smith

Mon 16/3

10:20-09:30

2 stops34h 10m

$2,224

PortoSydney

OPO - SYD

OPOSYD

Porto

Thu 30/10

12:35-09:05

2 stops33h 30m

Sydney Kingsford Smith

Wed 12/11

11:20-09:30

2 stops33h 10m

$2,224

PortoSydney

OPO - SYD

OPOSYD

Porto

Sun 4/1

16:10-19:20

2 stops40h 10m

Sydney Kingsford Smith

Sat 24/1

12:45-15:10

2 stops37h 25m

$2,265

PortoSydney

OPO - SYD

OPOSYD

Porto

Wed 7/1

16:10-19:20

2 stops40h 10m

Sydney Kingsford Smith

Fri 23/1

12:45-09:55

2 stops32h 10m

$2,298

PortoSydney

OPO - SYD

OPOSYD

Porto

Tue 6/1

10:55-19:20

2 stops45h 25m

Sydney Kingsford Smith

Fri 23/1

12:45-09:55

2 stops32h 10m

$2,298

PortoSydney

OPO - SYD

OPOSYD

Porto

Wed 7/1

10:55-19:20

2 stops45h 25m

Sydney Kingsford Smith

Sun 18/1

12:45-15:10

2 stops37h 25m

$2,298

Flights are sorted by cheapest return flights first.

Deals found on 16/9

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, May is the cheapest month in which you can book a flight from Porto to Sydney (average of $129). Flying from Porto to Sydney in October is currently the most expensive (average of $171). 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 36h 50m. 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.

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

    Currently, May is the cheapest month in which you can book a flight from Porto to Sydney (average of $129). Flying from Porto to Sydney in October is currently the most expensive (average of $171). 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
Katoomba
Penrith
Manly
Terrigal
Lithgow
Randwick
Bondi Beach
Coogee
Cronulla
Leura

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Porto to Sydney

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Fly with Cheapflights

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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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