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Cheap flights from Porto to Sydney from $908

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 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — SYD
14 Dec — 21 Dec1
1 adult
1 adult, Economy, 0 bags

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 14 November 2025.

Round-trip from

$2,167

One-way from

$908

Popular in

April

Cheapest in

January

Average price

$2,368
British Airways
  • British Airways
  • 7/4-28/4
  • 4 total stops
  • 73h 20m total
  • Porto to Sydney
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11/2
  • 11/2
  • 3 total stops
  • 51h 20m total
  • Porto to Sydney
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Highest demand for flights based on searches. 4% potential increase in price ($163 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($84 potential savings vs. average return price).
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Average for round-trip flights in November 2025
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Find 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 14 November 2025.

Mon 17/1120:40OPO - SYD
2 stops35h 10mMultiple Airlines
Tue 2/1216:20SYD - OPO
2 stops36h 25mMultiple Airlines
Deal found 11/11$2,097
Tue 25/1112:35OPO - SYD
2 stops57h 30mUnited Airlines
Tue 24/212:10SYD - OPO
2 stops32h 20mUnited Airlines
Deal found 11/11$2,231
Thu 20/1106:25OPO - SYD
3 stops39h 50mMultiple Airlines
Fri 5/1211:15SYD - OPO
3 stops45h 35mMultiple Airlines
Deal found 12/11$2,265
Sun 16/1116:30OPO - SYD
2 stops39h 50mTurkish Airlines
Sat 22/1121:15SYD - OPO
2 stops29h 15mTurkish Airlines
Deal found 11/11$2,319
Wed 26/1110:55OPO - SYD
2 stops45h 25mTurkish Airlines
Fri 5/1221:15SYD - OPO
2 stops28h 55mTurkish Airlines
Deal found 12/11$2,385
Thu 20/1116:10OPO - SYD
2 stops40h 10mTurkish Airlines
Wed 3/1221:15SYD - OPO
2 stops28h 55mTurkish Airlines
Deal found 12/11$2,416
Wed 26/1116:15OPO - SYD
2 stops54h 20mMultiple Airlines
Fri 5/1211:20SYD - OPO
3 stops58h 55mMultiple Airlines
Deal found 11/11$2,658

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 14 November 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

Mon 17/11

20:40-18:50

2 stops35h 10m

Sydney Kingsford Smith

Tue 2/12

16:20-17:45

2 stops36h 25m

$2,097

PortoSydney

OPO - SYD

OPOSYD

Porto

Tue 25/11

12:35-09:05

2 stops57h 30m

Sydney Kingsford Smith

Tue 24/2

12:10-09:30

2 stops32h 20m

$2,234

PortoSydney

OPO - SYD

OPOSYD

Porto

Sun 16/11

16:30-19:20

2 stops39h 50m

Sydney Kingsford Smith

Sat 22/11

21:15-15:30

2 stops29h 15m

$2,319

PortoSydney

OPO - SYD

OPOSYD

Porto

Wed 26/11

10:55-19:20

2 stops45h 25m

Sydney Kingsford Smith

Fri 5/12

21:15-15:10

2 stops28h 55m

$2,385

PortoSydney

OPO - SYD

OPOSYD

Porto

Mon 12/1

11:25-19:15

2 stops44h 50m

Sydney Kingsford Smith

Tue 20/1

21:15-15:10

2 stops28h 55m

$2,585

PortoSydney

OPO - SYD

OPOSYD

Porto

Sun 16/11

16:30-19:20

2 stops39h 50m

Sydney Kingsford Smith

Sat 22/11

21:15-12:05

3 stops49h 50m

$2,771

PortoSydney

OPO - SYD

OPOSYD

Porto

Tue 25/11

16:15-09:35

2 stops54h 20m

Sydney Kingsford Smith

Tue 24/2

11:20-18:30

3 stops42h 10m

$2,774

PortoSydney

OPO - SYD

OPOSYD

Porto

Fri 5/12

10:55-19:20

2 stops45h 25m

Sydney Kingsford Smith

Mon 22/12

21:15-15:10

2 stops28h 55m

$2,808

PortoSydney

OPO - SYD

OPOSYD

Porto

Wed 11/2

15:55-06:15

3 stops51h 20m

$908

PortoSydney

OPO - SYD

OPOSYD

Porto

Sat 7/2

15:30-10:45

3 stops56h 15m

$960

Flights are sorted by cheapest return flights first.

Deals found on 11/11

Showing 1-10 of 17 results
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.

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 $1,865). Flying from Porto to Sydney in April is currently the most expensive (average of $2,887). 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 39h 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, December is the cheapest month in which you can book a flight from Porto to Sydney (average of $1,865). Flying from Porto to Sydney in April is currently the most expensive (average of $2,887). 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
Terrigal
Manly
Randwick
Lithgow
Coogee
Leura
Bondi Beach
Cronulla

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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.
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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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