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Cheap flights from Porto to Sydney from $738

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — SYD
22 Jul — 29 Jul1
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 22 June 2026.

Mon 22/611:35
OPO
-
SYD
2 stops33h 35m
Multiple Airlines
Mon 6/708:35
SYD
-
OPO
2 stops34h 05m
Multiple Airlines
Deal found 18/6$2,037
Thu 2/722:00
OPO
-
SYD
2 stops34h 10m
Multiple Airlines
Thu 16/708:35
SYD
-
OPO
2 stops58h 10m
Multiple Airlines
Deal found 21/6$2,100
Sun 21/611:35
OPO
-
SYD
2 stops33h 35m
Multiple Airlines
Mon 6/708:35
SYD
-
OPO
2 stops34h 05m
Multiple Airlines
Deal found 20/6$2,104
Fri 3/722:00
OPO
-
SYD
2 stops34h 10m
Multiple Airlines
Thu 16/708:35
SYD
-
OPO
2 stops58h 10m
Multiple Airlines
Deal found 21/6$2,116
Sat 4/708:35
OPO
-
SYD
2 stops43h 00m
Multiple Airlines
Wed 8/711:00
SYD
-
OPO
2 stops38h 10m
Multiple Airlines
Deal found 18/6$2,136
Fri 3/722:00
OPO
-
SYD
2 stops34h 10m
Multiple Airlines
Sun 19/714:45
SYD
-
OPO
2 stops51h 55m
Multiple Airlines
Deal found 21/6$2,139
Wed 1/708:20
OPO
-
SYD
2 stops36h 50m
Multiple Airlines
Wed 8/722:15
SYD
-
OPO
2 stops50h 30m
Multiple Airlines
Deal found 18/6$2,152
Mon 29/616:05
OPO
-
SYD
2 stops29h 05m
Multiple Airlines
Mon 13/720:50
SYD
-
OPO
2 stops43h 00m
Multiple Airlines
Deal found 21/6$2,190
Tue 8/906:15
OPO
-
SYD
2 stops41h 10m
Multiple Airlines
Tue 15/921:05
SYD
-
OPO
2 stops27h 35m
Multiple Airlines
Deal found 21/6$2,249

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 22 June 2026.

Round-trip from

$2,100

One-way from

$738

Popular in

May

Cheapest in

June

Average price

$2,006
2/7-16/7
  • 2/7-16/7
  • 4 total stops
  • 92h 20m total
  • Porto to Sydney
Search Deals
15/9
  • 15/9
  • 3 total stops
  • 55h 25m total
  • Porto to Sydney
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($15 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($53 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 22 June 2026.
Use the filters below to find and compare flights from Porto to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortoSydney

OPO - SYD

OPOSYD

Porto

Thu 2/7

22:00-17:10

2 stops34h 10m

Sydney Kingsford Smith

Thu 16/7

08:35-09:45

2 stops58h 10m

$2,100

PortoSydney

OPO - SYD

OPOSYD

Porto

Sat 4/7

08:35-12:35

2 stops43h 00m

Sydney Kingsford Smith

Wed 8/7

11:00-16:10

2 stops38h 10m

$2,136
Fastest return journey

PortoSydney

OPO - SYD

OPOSYD

Porto

Sat 14/11

16:40-06:50

2 stops27h 10m

Sydney Kingsford Smith

Tue 17/11

15:50-16:00

2 stops35h 10m

$2,257

PortoSydney

OPO - SYD

OPOSYD

Porto

Wed 9/9

12:35-06:55

2 stops33h 20m

Sydney Kingsford Smith

Sun 13/9

10:20-09:45

2 stops56h 25m

$2,380

PortoSydney

OPO - SYD

OPOSYD

Porto

Sat 14/11

12:35-09:05

2 stops33h 30m

Sydney Kingsford Smith

Tue 17/11

11:20-09:30

2 stops33h 10m

$2,459

PortoSydney

OPO - SYD

OPOSYD

Porto

Mon 7/9

09:00-07:00

2 stops61h 00m

Sydney Kingsford Smith

Tue 15/9

09:30-09:45

2 stops33h 15m

$2,461

PortoSydney

OPO - SYD

OPOSYD

Porto

Sun 19/7

10:45-19:10

2 stops47h 25m

Sydney Kingsford Smith

Sun 26/7

21:05-09:40

2 stops45h 35m

$2,590

PortoSydney

OPO - SYD

OPOSYD

Porto

Tue 21/7

16:50-19:10

2 stops41h 20m

Sydney Kingsford Smith

Sun 23/8

10:05-22:30

3 stops45h 25m

$2,698

PortoSydney

OPO - SYD

OPOSYD

Porto

Thu 2/7

19:55-17:10

2 stops36h 15m

Sydney Kingsford Smith

Thu 16/7

14:35-20:30

2 stops38h 55m

$2,750

PortoSydney

OPO - SYD

OPOSYD

Porto

Wed 9/9

16:20-06:30

3 stops29h 10m

Sydney Kingsford Smith

Mon 14/9

14:45-15:25

2 stops33h 40m

$2,840

Flights are sorted by cheapest return flights first.

Deals found on 19/6

Showing 1-10 of 18 resultsSorted by cheapest first
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.

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 27h 10m. 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.

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
Cronulla
Terrigal
Lithgow
Randwick
Bondi Beach
Leura
Coogee

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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