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Cheap flights from Porto to Sydney from $1,376

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 15/1. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — SYD
25 Dec — 1 Jan1
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 25 November 2025.

Round-trip from

$2,183

One-way from

$1,376

Popular in

April

Cheapest in

January

Average price

$2,403
27/12-21/2
  • 27/12-21/2
  • 6 total stops
  • 81h 35m total
  • Porto to Sydney
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15/1
  • 15/1
  • 3 total stops
  • 56h 40m total
  • Porto to Sydney
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($167 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($87 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 25 November 2025.

Sat 27/1206:20OPO - SYD
3 stops46h 00mMultiple Airlines
Sat 21/213:35SYD - OPO
3 stops35h 35mMultiple Airlines
Deal found 24/11$2,183
Mon 29/1219:45OPO - SYD
2 stops32h 45mMultiple Airlines
Tue 13/115:15SYD - OPO
2 stops33h 05mMultiple Airlines
Deal found 24/11$2,248
Wed 26/1116:10OPO - SYD
2 stops40h 10mTurkish Airlines
Fri 5/1221:15SYD - OPO
2 stops28h 55mTurkish Airlines
Deal found 23/11$2,406
Mon 29/1219:45OPO - SYD
2 stops47h 50mMultiple Airlines
Fri 20/221:15SYD - OPO
2 stops28h 55mMultiple Airlines
Deal found 24/11$2,438
Tue 25/1116:10OPO - SYD
2 stops28h 15mKLM
Tue 2/1215:55SYD - OPO
2 stops29h 35mKLM
Deal found 24/11$2,454
Tue 25/1111:00OPO - SYD
3 stops36h 00mMultiple Airlines
Tue 2/1212:00SYD - OPO
2 stops35h 05mMultiple Airlines
Deal found 24/11$2,457
Sat 27/1216:10OPO - SYD
2 stops59h 30mMultiple Airlines
Fri 20/221:15SYD - OPO
2 stops28h 55mMultiple Airlines
Deal found 24/11$2,519
Mon 24/1112:35OPO - SYD
2 stops34h 25mMultiple Airlines
Sun 7/1211:15SYD - OPO
3 stops46h 10mMultiple Airlines
Deal found 22/11$2,627

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 25 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 29/12

19:45-15:30

2 stops32h 45m

Sydney Kingsford Smith

Tue 13/1

15:15-13:20

2 stops33h 05m

$2,248

PortoSydney

OPO - SYD

OPOSYD

Porto

Thu 5/3

12:35-09:05

2 stops33h 30m

Sydney Kingsford Smith

Mon 9/3

10:20-09:30

2 stops34h 10m

$2,254

PortoSydney

OPO - SYD

OPOSYD

Porto

Mon 29/12

19:45-06:35

2 stops47h 50m

Sydney Kingsford Smith

Fri 20/2

21:15-15:10

2 stops28h 55m

$2,438

PortoSydney

OPO - SYD

OPOSYD

Porto

Sun 18/1

13:10-10:00

2 stops33h 50m

Sydney Kingsford Smith

Sat 31/1

12:00-10:05

2 stops33h 05m

$2,505

PortoSydney

OPO - SYD

OPOSYD

Porto

Sat 27/12

16:10-14:40

2 stops59h 30m

Sydney Kingsford Smith

Fri 20/2

21:15-15:10

2 stops28h 55m

$2,519

PortoSydney

OPO - SYD

OPOSYD

Porto

Mon 29/12

19:45-06:35

2 stops47h 50m

Sydney Kingsford Smith

Sat 21/2

21:15-09:55

2 stops47h 40m

$2,545

PortoSydney

OPO - SYD

OPOSYD

Porto

Sun 28/12

06:30-14:40

2 stops45h 10m

Sydney Kingsford Smith

Fri 20/2

21:15-15:10

2 stops28h 55m

$2,678

PortoSydney

OPO - SYD

OPOSYD

Porto

Mon 29/12

16:10-19:50

2 stops40h 40m

Sydney Kingsford Smith

Thu 19/2

12:00-09:55

2 stops32h 55m

$2,771

PortoSydney

OPO - SYD

OPOSYD

Porto

Thu 15/1

12:25-08:05

3 stops56h 40m

$1,376

Flights are sorted by cheapest return flights first.

Deals found on 24/11

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 $1,892). Flying from Porto to Sydney in April is currently the most expensive (average of $2,929). 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 33h 30m. 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 $1,892). Flying from Porto to Sydney in April is currently the most expensive (average of $2,929). 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

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

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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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