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Cheap flights from Portugal to Sydney from $749

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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SYD
16 Sep — 23 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portugal to Sydney

Enter your travel dates to find the best prices.

Cheapest flights from Portugal to Sydney
Explore the most affordable flight options available from Portugal to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 August 2026.

Tue 10/1120:40 -
2 stops50h 20m
Tue 17/1121:30 -
1 stop44h 25m
Deal found 16/8$1,549
Tue 10/1106:15 -
2 stops45h 50m
Mon 16/1121:30 -
1 stop44h 25m
Deal found 16/8$1,648
Fri 6/1116:15 -
2 stops41h 05m
Mon 16/1116:50 -
1 stop25h 05m
Deal found 17/8$1,678
Tue 15/907:00 -
3 stops40h 50m
Tue 22/915:40 -
1 stop24h 35m
Deal found 16/8$1,697
Sat 17/1021:25 -
2 stops29h 20m
Tue 10/1121:30 -
1 stop44h 25m
Deal found 13/8$1,716
Mon 14/906:35 -
2 stops46h 40m
Mon 28/920:50 -
1 stop43h 25m
Deal found 13/8$1,731
Sun 27/922:20 -
2 stops49h 40m
Sun 4/1016:40 -
1 stop24h 35m
Deal found 13/8$1,733
Sat 7/1109:40 -
2 stops36h 45m
Mon 16/1121:30 -
1 stop44h 25m
Deal found 17/8$1,747
Wed 4/1117:40 -
2 stops39h 40m
Tue 17/1116:50 -
1 stop25h 05m
Deal found 17/8$1,748
Wed 11/1117:05 -
2 stops38h 45m
Mon 16/1116:50 -
1 stop25h 05m
Deal found 16/8$1,750
Thu 5/1112:45 -
2 stops37h 50m
Tue 17/1116:50 -
1 stop25h 05m
Deal found 17/8$1,762
Sun 27/906:35 -
2 stops41h 25m
Thu 15/1012:00 -
2 stops41h 05m
Deal found 13/8$1,847

Find flight deals from Portugal to Sydney

Keep the following information in mind while searching for Portugal to Sydney flight deals. Data was last updated 17 August 2026.

Round-trip from

$1,531

One-way from

$749

Popular in

April

Cheapest in

March

Average price

$2,589
Etihad Airways
  • Etihad Airways
  • 10/11-17/11
  • 3 total stops
  • 94h 45m total
  • Portugal to Sydney
Search Deals
3/9
  • 3/9
  • 2 total stops
  • 54h 35m total
  • Portugal to Sydney
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($148 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($84 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portugal 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 17 August 2026.
Use the filters below to find and compare flights from Portugal to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Fri 11/9

05:00-19:25

2 stops29h 25m

Sydney Kingsford Smith

Thu 24/9

20:50-23:10

2 stops35h 20m

$2,028

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Mon 21/12

12:25-19:20

2 stops43h 55m

Sydney Kingsford Smith

Sun 17/1

21:10-07:40

2 stops69h 30m

$2,251

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Sat 7/11

20:40-19:20

2 stops35h 40m

Sydney Kingsford Smith

Wed 11/11

15:50-16:00

2 stops35h 10m

$2,284

LisbonSydney

LIS Lisbon Humberto Delgado - SYD Sydney Kingsford Smith

LISSYD

Lisbon Humberto Delgado

Sun 6/9

16:35-06:45

2 stops29h 10m

Sydney Kingsford Smith

Tue 22/9

09:50-21:55

2 stops45h 05m

$2,307

LisbonSydney

LIS Lisbon Humberto Delgado - SYD Sydney Kingsford Smith

LISSYD

Lisbon Humberto Delgado

Sat 31/10

11:05-06:55

2 stops32h 50m

Sydney Kingsford Smith

Sat 20/2

16:20-09:50

2 stops28h 30m

$2,358

LisbonSydney

LIS Lisbon Humberto Delgado - SYD Sydney Kingsford Smith

LISSYD

Lisbon Humberto Delgado

Sat 31/10

12:20-09:20

2 stops34h 00m

Sydney Kingsford Smith

Sat 20/2

09:20-08:10

2 stops33h 50m

$2,399

LisbonSydney

LIS Lisbon Humberto Delgado - SYD Sydney Kingsford Smith

LISSYD

Lisbon Humberto Delgado

Mon 7/9

18:40-06:30

1 stop26h 50m

Sydney Kingsford Smith

Tue 22/9

14:50-17:00

1 stop35h 10m

$2,519
Fastest return journey

LisbonSydney

LIS Lisbon Humberto Delgado - SYD Sydney Kingsford Smith

LISSYD

Lisbon Humberto Delgado

Mon 14/12

08:15-17:45

1 stop22h 30m

Sydney Kingsford Smith

Mon 4/1

16:50-06:55

1 stop25h 05m

$2,585

LisbonSydney

LIS Lisbon Humberto Delgado - SYD Sydney Kingsford Smith

LISSYD

Lisbon Humberto Delgado

Wed 28/10

08:15-17:45

1 stop22h 30m

Sydney Kingsford Smith

Sun 1/11

16:50-06:55

1 stop25h 05m

$2,592

PortoSydney

OPO Porto - SYD Sydney Kingsford Smith

OPOSYD

Porto

Tue 12/1

16:10-08:10

3 stops29h 00m

Sydney Kingsford Smith

Sun 31/1

16:30-10:35

2 stops29h 05m

$2,641

Flights are sorted by cheapest return flights first.

Deals found on 13/8

Showing 1-10 of 29 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Portugal to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Portugal 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 Portugal to Sydney

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

Currently, June is the cheapest month in which you can book a flight from Portugal to Sydney (average of $1,982). Flying from Portugal to Sydney in April is currently the most expensive (average of $3,122). 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.

How far ahead should I book a flight from Portugal to Sydney?

Booking 16 days in advance of your planned departure date is, on average, the best time to get cheap flights from Portugal to Sydney. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated 17 August 2026.
Read reviews from past customers who have flown with Etihad Airways from Portugal to Sydney. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Etihad Airways
7.3
Good
1,504 reviews
Check prices

Comfort

7.3

Entertainment

7.2

Crew

7.8

Boarding

7.5

Food

7.1

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,June 2026

AUH - KBL

really liked the excellent customer service, friendly staff, smooth check-in process, and comfortable flight. Everyone was professional and helpful, which made my journey enjoyable and stress-free.
Etihad Airways
7.3
Good
1,504 reviews
Etihad Airways
7.3
Good
1,504 reviews
Check prices

Comfort

7.3

Entertainment

7.2

Crew

7.8

Boarding

7.5

Food

7.1

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,June 2026

AUH - KBL

really liked the excellent customer service, friendly staff, smooth check-in process, and comfortable flight. Everyone was professional and helpful, which made my journey enjoyable and stress-free.

Related info for your journey

Find useful and relevant information for your journey from Portugal to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sydney from Portugal?

    For a flight from Portugal to Sydney, you will be flying into Kingsford Smith. Sydney Kingsford Smith (SYD) is just 7.5 km from the centre of the city.

  • How long is the flight from Portugal to Sydney?

    Departing from Portugal to Sydney will take you 29h 10m. There are 18163 km between Portugal and Sydney. This flight may include one or multiple stops.

  • Can I find deals for flights from Portugal to Sydney that include hotel bookings?

    Yes. In addition to deals on Portugal to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portugal to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portugal to Sydney.

  • Can I find deals for business class flights from Portugal to Sydney?

    Yes. Cheapflights offers flight deals from Portugal 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 Portugal to Sydney?

    Currently, June is the cheapest month in which you can book a flight from Portugal to Sydney (average of $1,982). Flying from Portugal to Sydney in April is currently the most expensive (average of $3,122). 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
Penrith
Manly
Katoomba
Lithgow
Cronulla
Randwick
Terrigal
Leura
Bondi Beach
Coogee

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Top airline flying from Portugal to Sydney

Discover the top airline that operate flights from Portugal to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 17 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Etihad AirwaysCheapest$2,123Average$2,507FlexibilityNo cancel feeOn-time75%
Search Etihad Airways 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 Portugal to Sydney?

Cheapflights helps you search for flights from Portugal to Sydney via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Portugal to Sydney?

Cheapflights simply makes it quick and affordable to book flights from Portugal to Sydney by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Portugal to Sydney with no change fees?

Yes! Cheapflights helps users easily find flights from Portugal to Sydney with no change fees.

Can Cheapflights notify me if prices for flights from Portugal to Sydney become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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