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Cheap flights from Porto to Sydney from $870

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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — SYD
22 Jan — 29 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Porto to Sydney

Enter your travel dates to find the best prices.

Best flights from Porto to Sydney
Discover carefully curated flight deals from Porto to Sydney that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 December 2025.

Sat 14/219:50OPO - SYD
2 stops48h 05mBritish Airways
Mon 2/316:20SYD - OPO
2 stops36h 15mBritish Airways
Deal found 22/12$2,020
Sat 14/210:00OPO - SYD
3 stops33h 35mMultiple Airlines
Mon 2/313:35SYD - OPO
3 stops32h 25mMultiple Airlines
Deal found 22/12$2,171
Sat 7/312:35OPO - SYD
2 stops33h 30mUnited Airlines
Tue 10/314:00SYD - OPO
2 stops30h 30mUnited Airlines
Deal found 20/12$2,228
Sun 15/206:15OPO - SYD
3 stops40h 20mAir Canada
Tue 3/311:20SYD - OPO
3 stops38h 25mAir Canada
Deal found 22/12$2,869
Thu 5/216:10OPO - SYD
3 stops28h 20mKLM
Thu 12/216:15SYD - OPO
2 stops41h 10mKLM
Deal found 22/12$2,886
Tue 13/116:10OPO - SYD
2 stops30h 45mTurkish Airlines
Sat 24/121:15SYD - OPO
2 stops47h 40mTurkish Airlines
Deal found 20/12$2,889
Sun 15/220:05OPO - SYD
2 stops47h 50mBritish Airways
Tue 3/310:20SYD - OPO
2 stops42h 25mBritish Airways
Deal found 22/12$2,120
Wed 7/106:05OPO - SYD
3 stops40h 10mMultiple Airlines
Sun 11/121:50SYD - OPO
3 stops36h 10mMultiple Airlines
Deal found 22/12$2,406
Sat 10/114:45OPO - SYD
3 stops33h 15mMultiple Airlines
Sat 17/113:35SYD - OPO
3 stops43h 05mMultiple Airlines
Deal found 22/12$2,698

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 23 December 2025.

Round-trip from

$1,926

One-way from

$870

Popular in

April

Cheapest in

January

Average price

$2,641
15/2-2/3
  • 15/2-2/3
  • 4 total stops
  • 71h 15m total
  • Porto to Sydney
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5/4
  • 5/4
  • 3 total stops
  • 52h 10m total
  • Porto to Sydney
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($122 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($79 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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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 23 December 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

Sat 14/2

19:50-06:55

2 stops48h 05m

Sydney Kingsford Smith

Mon 2/3

16:20-17:35

2 stops36h 15m

$2,020

PortoSydney

OPO - SYD

OPOSYD

Porto

Sun 15/2

20:05-06:55

2 stops47h 50m

Sydney Kingsford Smith

Tue 3/3

10:20-17:45

2 stops42h 25m

$2,120

PortoSydney

OPO - SYD

OPOSYD

Porto

Sat 14/2

10:00-06:35

3 stops33h 35m

Sydney Kingsford Smith

Mon 2/3

13:35-11:00

3 stops32h 25m

$2,171

PortoSydney

OPO - SYD

OPOSYD

Porto

Sat 7/3

12:35-09:05

2 stops33h 30m

Sydney Kingsford Smith

Tue 10/3

14:00-09:30

2 stops30h 30m

$2,228

PortoSydney

OPO - SYD

OPOSYD

Porto

Wed 7/1

06:05-09:15

3 stops40h 10m

Sydney Kingsford Smith

Sun 11/1

21:50-23:00

3 stops36h 10m

$2,406

PortoSydney

OPO - SYD

OPOSYD

Porto

Sat 10/1

14:45-11:00

3 stops33h 15m

Sydney Kingsford Smith

Sat 17/1

13:35-21:40

3 stops43h 05m

$2,698

PortoSydney

OPO - SYD

OPOSYD

Porto

Sun 15/2

06:15-09:35

3 stops40h 20m

Sydney Kingsford Smith

Tue 3/3

11:20-14:45

3 stops38h 25m

$2,869

PortoSydney

OPO - SYD

OPOSYD

Porto

Thu 5/2

16:10-07:30

3 stops28h 20m

Sydney Kingsford Smith

Thu 12/2

16:15-22:25

2 stops41h 10m

$2,886

PortoSydney

OPO - SYD

OPOSYD

Porto

Tue 13/1

16:10-09:55

2 stops30h 45m

Sydney Kingsford Smith

Sat 24/1

21:15-09:55

2 stops47h 40m

$2,889

PortoSydney

OPO - SYD

OPOSYD

Porto

Sun 5/4

06:25-19:35

3 stops52h 10m

$870

Flights are sorted by cheapest return flights first.

Deals found on 22/12

Showing 1-10 of 14 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 $1,841). Flying from Porto to Sydney in April is currently the most expensive (average of $2,848). 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. 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 $1,841). Flying from Porto to Sydney in April is currently the most expensive (average of $2,848). 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
Cronulla
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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