$678 Find Cheap Flights from Portugal to Sydney – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Sydney departing on 17/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Portugal to Sydney

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Portugal to Sydney that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Portugal to Sydney

Thu, 12 Nov - Thu, 19 Nov
Multiple Airlines Logo
06:00 - 08:35
LIS
-
SYD
39h 35m
2 stops
Multiple Airlines Logo
10:40 - 22:35
SYD
-
LIS
46h 55m
2 stops
$1,551Multiple Airlines
Mon, 7 Sep - Tue, 22 Sep
Multiple Airlines Logo
22:00 - 14:50
OPO
-
SYD
55h 50m
2 stops
Multiple Airlines Logo
19:40 - 21:20
SYD
-
OPO
34h 40m
2 stops
$1,738Multiple Airlines
Tue, 22 Sep - Sun, 4 Oct
Multiple Airlines Logo
16:05 - 19:05
LIS
-
SYD
42h 00m
2 stops
Multiple Airlines Logo
21:35 - 14:15
SYD
-
LIS
50h 40m
2 stops
$1,758Multiple Airlines
Sun, 6 Sep - Tue, 22 Sep
Multiple Airlines Logo
05:55 - 14:15
OPO
-
SYD
47h 20m
2 stops
Multiple Airlines Logo
21:05 - 15:40
SYD
-
OPO
27h 35m
2 stops
$1,761Multiple Airlines
Sun, 6 Sep - Tue, 22 Sep
Multiple Airlines Logo
05:55 - 14:15
OPO
-
SYD
47h 20m
2 stops
Multiple Airlines Logo
21:05 - 15:40
SYD
-
OPO
27h 35m
2 stops
$1,764Multiple Airlines
Sun, 20 Sep - Tue, 6 Oct
Multiple Airlines Logo
07:35 - 19:05
LIS
-
SYD
50h 30m
2 stops
Multiple Airlines Logo
21:35 - 16:35
SYD
-
LIS
53h 00m
2 stops
$1,768Multiple Airlines
Sun, 6 Sep - Tue, 22 Sep
Multiple Airlines Logo
05:55 - 14:15
OPO
-
SYD
47h 20m
2 stops
Multiple Airlines Logo
21:05 - 15:40
SYD
-
OPO
27h 35m
2 stops
$1,777Multiple Airlines
Thu, 10 Sep - Tue, 29 Sep
Multiple Airlines Logo
16:05 - 19:05
LIS
-
SYD
42h 00m
2 stops
Multiple Airlines Logo
20:35 - 08:45
SYD
-
LIS
45h 10m
2 stops
$1,801Multiple Airlines
Mon, 7 Sep - Mon, 21 Sep
Etihad Airways Logo
09:10 - 16:50
LIS
-
SYD
22h 40m
1 stop
Etihad Airways Logo
20:50 - 07:15
SYD
-
LIS
43h 25m
1 stop
$2,212Etihad Airways
Mon, 21 Sep - Tue, 6 Oct
Etihad Airways Logo
09:10 - 16:50
LIS
-
SYD
22h 40m
1 stop
Etihad Airways Logo
21:35 - 07:25
SYD
-
LIS
43h 50m
1 stop
$2,220Etihad Airways
Booking Insights

KAYAK's insights & trends for flights to Sydney

Get data-powered insights and trends into flights to Sydney to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to Sydney?

These are the best return prices found by users searching on KAYAK in the last 5 days.

In the last 5 days, the cheapest flight deal to Sydney was found on the route from Porto, at $1,551 return. The most popular connection is from Lisbon to Sydney, while KAYAK users have found return deals for as low as $1,551 in the last 5 days.

What is the cheapest month to fly to Sydney?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights to Sydney, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to Sydney is June, where tickets cost $2,010 on average for return flights. On the other hand, the most expensive months are April and July, where the average cost of tickets from Portugal is $3,166 and $2,740 respectively. For one-way flights, the best month to travel is June with an average price of $1,213.

How far in advance should I book a flight to Sydney?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Sydney, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price, you should book around 2 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Find deals

Good to know

Low season

June

Cheapest flight

$678
Best time to beat the crowds (13% less expensive on average)
Most popular time to fly (2% more expensive on average)
Flight from Porto to Sydney

FAQs - booking Sydney flights

  • What is the cheapest flight to Sydney?

    In the last 5 days, the cheapest flight deal to Sydney was found on the route from Porto, at $1,551 return. The most popular connection is from Lisbon to Sydney, while KAYAK users have found return deals for as low as $1,551 in the last 5 days.

  • How far is Sydney Kingsford Smith Airport from central Sydney?

    The distance between Sydney Kingsford Smith Airport and the city centre of Sydney is 7 km.

  • What is the name of Sydney’s airport?

    When flying to Sydney, you'll arrive at Sydney Kingsford Smith Airport (SYD). The airport is also known as Kingsford Smith or Sydney.

  • How does KAYAK find such low prices on flights to Sydney?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Sydney.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Sydney?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Sydney?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sydney with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Sydney?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many direct flights to Sydney are there each week?

    Each week there are around 8,235 direct flights from within Portugal to Sydney. The most common day for departures is Friday, with 17% of flights taking off on this day.

Top tips for finding cheap flights to Sydney

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Sydney flight deals.

Reviews of the top airline flying from Portugal to Sydney

 
See real verified KAYAK customer reviews for airlines flying to Sydney. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Portugal to Sydney. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Sydney? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.3
Etihad AirwaysOverall score based on 1499 reviews
7.5Boarding
7.8Crew
7.2Entertainment
7.1Food
7.3Comfort
Airline reviews

Boarding staff at lahore airport corporate well. Thanks to that guy.

10.0 Excellentneelam, July 2026
LHE - AUH
Read more Etihad Airways reviews

Boarding staff at lahore airport corporate well. Thanks to that guy.

They lost the baggage and said it was deleted from the system. I had baggage tag so was able to file the complaint but there was no PIR number and update so far

Air hostesses were great. Food was good. Flat bed is not that flat or comfortable.

More leg space than other flights, but felt like *maybe* narrower seats?

The seat was like there is no leg space....there were no proper option for food in the airline. It seemed like the airline was at brink of bankruptcy. The crew was helpful except for a few.

1st of all on February 27th Abu Dhabi to Delhi flight the seat wasn't comfortable at all, coming back the Lounge at Abu Dhabi didn't have anything. Than the Food in the flight

Crew were very polite and quicker in service. Excellent cooling, comfortable seats and tasty food served

Crew was good, boarding mediocre, food choices were limited, seating was not comfortable

Sits are very uncomfortable and food quality should be improved. Alcohol you have to ask and wait for more then 1/2 hrs. Don’t feel like to travel in Etihad. It was 1st time we traveled in Etihad now we decided we don’t want to travel in Etihad.

I travelled from Adu Dhabi to Melb; service was minimal at best, when I asked for a bottle of water but no meal I was told it was not available- it seemed a cup would do. The staff were un helpful & dismissive. We had a family near us who I never saw obtain any assistance from crew- they were simply avoided! Meal was simple and adequate no hot drinks were on offer until close to arriving, with a pseudo breakfast. Seats were tight despite obtaining extra leg room. I will not be flying with Etihad again and will not recommend them to family & friends.

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Wollongong
Parramatta
Leura
Katoomba
Terrigal
Penrith
Manly
Cronulla
Coogee
Randwick
Lithgow
Bondi Beach
Swansea
Newport
Charlestown
Brooklyn

Everything you need to know for your flight to Sydney

Information on the airport you'll fly into in Sydney

Sydney (SYD)