SYD - OPO

$860 Find Cheap Flights from Sydney to Porto

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sydney to Porto departing on 15/9. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Porto

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sydney to Porto.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sydney to Porto.
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Flights Deals

Cheap Flights from Sydney to Porto (SYD-OPO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Sydney to Porto 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 Sydney to Porto

Fri, 26 Sep - Sat, 18 Oct
 Logo
15:40 - 19:20SYD-OPO
36h 40m2 stops
 Logo
16:05 - 07:10OPO-SYD
29h 05m2 stops
$1,630
Find Deal
Wed, 10 Sep - Mon, 22 Sep
 Logo
15:40 - 10:10SYD-OPO
27h 30m2 stops
 Logo
16:05 - 06:10OPO-SYD
29h 05m2 stops
$1,734
Find Deal
Fri, 12 Sep - Fri, 19 Sep
 Logo
21:30 - 21:00SYD-OPO
32h 30m2 stops
 Logo
07:20 - 06:10OPO-SYD
37h 50m3 stops
$1,931
Find Deal
Fri, 12 Sep - Fri, 19 Sep
 Logo
21:30 - 21:00SYD-OPO
32h 30m2 stops
 Logo
22:30 - 14:50OPO-SYD
31h 20m2 stops
$1,932
Find Deal
Fri, 26 Sep - Fri, 17 Oct
Etihad Airways Logo
21:30 - 06:50SYD-OPO
42h 20m2 stops
Etihad Airways Logo
20:10 - 07:10OPO-SYD
49h 00m2 stops
$1,945Etihad Airways
Find Deal
Wed, 10 Sep - Mon, 22 Sep
United Airlines Logo
09:30 - 06:05SYD-OPO
29h 35m2 stops
United Airlines Logo
09:00 - 07:00OPO-SYD
37h 00m2 stops
$2,042United Airlines
Find Deal
Fri, 22 Aug - Fri, 19 Sep
Etihad Airways Logo
21:30 - 06:50SYD-OPO
42h 20m2 stops
Etihad Airways Logo
16:05 - 06:10OPO-SYD
29h 05m2 stops
$2,468Etihad Airways
Find Deal
Fri, 12 Sep - Fri, 19 Sep
United Airlines Logo
09:30 - 09:45SYD-OPO
33h 15m2 stops
United Airlines Logo
12:35 - 07:00OPO-SYD
33h 25m2 stops
$3,008United Airlines
Find Deal
Sat, 27 Sep - Sat, 11 Oct
KLM Logo
11:45 - 10:40SYD-OPO
31h 55m3 stops
KLM Logo
16:20 - 07:40OPO-SYD
29h 20m2 stops
$3,253KLM
Find Deal
Fri, 29 Aug - Fri, 12 Sep
KLM Logo
10:20 - 10:40SYD-OPO
33h 20m2 stops
KLM Logo
16:20 - 06:30OPO-SYD
29h 10m3 stops
$3,700KLM
Find Deal
Booking Insights

KAYAK's insights & trends for Sydney to Porto flights

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

How much is a round-trip flight from Sydney to Porto?

What is the cheapest month to fly from Sydney to Porto?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sydney to Porto, 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 from Sydney to Porto is January, where tickets cost $1,883 (return) on average. On the other hand, the most expensive months are December and April, where the average cost of round-trip tickets is $2,994 and $2,559 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Sydney to Porto, 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 on the flight from Sydney to Porto, you should book around 9 weeks before departure, which saves you about 20% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.


Good to know

Low seasonMarch
Cheapest flight$860
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly (3% more expensive on average)
Flight from Sydney to Porto

When to book flights from Sydney to Porto

Are your dates flexible? Find out the best times to travel from Sydney to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Sydney to Porto

  • What is the cheapest flight from Sydney to Porto?

    In the last 3 days, the lowest price for a flight from Sydney to Porto was $554 for a one-way ticket and $1,050 for a return.

  • Which airports will I be using when flying from Sydney to Porto?

    On your way to Porto, you’ll fly out from Sydney Kingsford Smith. You’ll be landing at Porto.

  • Which aircraft models fly most regularly from Sydney to Porto?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Sydney to Porto?

    Star Alliance, and SkyTeam are the airline alliances operating flights between Sydney and Porto, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Sydney to Porto, KLM or Etihad Airways?

    The two airlines most popular with KAYAK users for flights from Sydney to Porto are KLM and Etihad Airways. With an average price for the route of $3,282 and an overall rating of 7.8, KLM is the most popular choice. Etihad Airways is also a great choice for the route, with an average price of $2,393 and an overall rating of 7.4.

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

    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 from Sydney to Porto.

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

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

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

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

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

    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 Porto from Sydney up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines flying from Sydney to Porto

 
See real verified KAYAK customer reviews for airlines flying from Sydney to Porto. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Sydney to Porto? 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.
7.5
SWISSOverall score based on 1686 reviews
7.4Comfort
8.2Crew
7.1Food
7.7Boarding
6.8Entertainment
Airline reviews

The cabin was warm and few used the blankets. I should’ve upgraded.

8.0 Excellentscott, July 2025ZRH - TPA
Read more SWISS reviews

The cabin was warm and few used the blankets. I should’ve upgraded.

I purchased a one way business class ticket from Geneva to Miami but the check in agent said I had an economy ticket and later upgraded to business class. This was not the case, I had a single business class transaction. I was forced to pay for my second checked bag. I am unsure of why this happened. But I won’t use Kayak again for business class tickets.

The food was good. Most the staff was pleasant. The flight would be drastically improved with WiFi on a long international flight.

The crew was very friendly and nice! Very smooth flight.

All the flight to USA were arranged to E terminal whereas from Dubrovnik arriving on Zurich is on A80, have to walk all the way from A to E, even need transfer bus , for short transfer time like in an hour, we have to work fast, as soon as arrived at E, it is about time to boarding, pretty tight schedule, I hope Zurich airport can make some rearrangement so that transfer people do not have to walk long way. For short transfer time people, such as 50 min, this is even impossible if still like this.

When I needed to get my bag off of the plane so that I could take a train because the connection was 4 hours later, they took 2 hours to take my bag off making me take the train and miss my flight simultaneously. The seat size on the plane is too small for an average aged woman let alone a middle-aged man. It's unacceptable and I will not fly Boeing again.

Delayed 30 mins Forced to check in my carry on luggage

They didn't give us Nothing to eat, come on..... 1 package of chips and a glass of soda won't do anything to the company

The cushion of the seats are old and very thin. The food can be more tasty or come with salt packages

I haven't flown Swiss in a long time. I was disappointed that after paying $14,907 for 3 business class seats, we still had to pay another $200 for a single business class seat. All the window seats used to be single seats. Now it's every other one and if you want a single seat it's extra. Also, The double seats do not have pods or any privacy. We landed in Chicago after a long 10 hour flight and our connecting flight was on United. Because we do not have status on Swiss, we were not allowed to use the United lounge, even with business class seats. My father is on crutches and we had a 4 hour layover. No lounge was also disappointing. All of my status is on British Airways so I will go back to flying BA. We flew Swiss because my father did not want to go through Heathrow. On a positive, the crew were super nice and accommodating for my father who had recently had hip replacement surgery. Food was okay. I"m not a good person to critique the food, I never like airplane food.

Indigo airlines is terrible. Staff is awful and so disorganized. They are so rude and unhelpful. I will never travel on Indigo airlines again!!!!!

The seats were uncomfortable. The service was poor. We bought internet for my family and myself and it didn’t work. The charger for our phone didn’t work. The service seemed like they were tired and exhausted and seemed a bit upset. It was not a good flight. Our flight from miami to Qatar was great but from Qatar to Tokyo was simply awful

I had to stay in the airport 15 even with a hotel reservation..i was refused to inter to qatar cuz the hotel was outside the airport. They could have offered a solution. It was really exhausting for me and my family.

The American/Hollywood movies in the entertainment system lack english subtitles, they tend to have only arabic subtitles. Coupled with the low quality airplane earphones and cabin noise, it sometimes is difficult to follow the movie dialogues.

Qatar Airways did a very good job. Flights were slightly delayed with boarding but pilots made up time by arrival. The food was OK, no better or worse than other airlines. Although it would be nice to have three meals during 16 hours flight instead of two.

The space was tight, hardly any leg room and the crew surprisingly were busy and did not take the time to attend to passengers, felt rushed. There was a delay for check in since the systems were down the airport staffs were accommodating

No difference between US airline and Qatar. Both cramp as many people. The airline seems to change planes without notice choice is seating when making reservations online doesn’t match the plane a passenger is on. Especially paying extra. Nothing special No different than US carriers.

Qatar Airways in-flight first/business class service is superior to any US airline; excellent meals are served on short haul flights such as between DXB and DOH.

Doha airport is huge , takes long time to reach gate .

Moved seats, didn't accommodate requests to change seats even though other seats were available.

A380 First Class Apartments were phenomenal. Comfortable bed and matress cover, superior vegetarian five course meal, shower, small business lounge and plenty of exercise walking around the aircraft.

second leg was more comfortable. Customer service in Abu Dhabi is okay.

Certainly! Here’s a more concise and refined version of your report, maintaining a polished and professional tone: --- Crew Check-In – Kolkata (CCU) The crew handling check-in in Kolkata was outstanding—efficient, courteous, and highly organized. Flight Segment – CCU to Abu Dhabi (AUH) A standard flight overall. Notably, only one in-flight meal option—a vegetarian curry—was available, which seemed unsuitable for a red-eye journey. The crew offered no alternatives, which was unexpected. Flight Segment – Abu Dhabi to Rome (AUH-FCO) Comfort improved on this leg, but service quality was average, falling short of Etihad’s premium standards. Crew attention was heavily absorbed by a difficult couple in Row 15 (port side), resulting in disproportionate focus. It was concerning that a steward had to personally return to apologize, a task better suited for supervisory staff. This highlights a development opportunity for supervisors Anna and Quashim in managing guest escalation professionally.

Should have had business class line in immigration. Food quality suboptimal

The staff were wonderful but the seats weren't very comfortable for a bigger guy like me.

The flight take time was changed 23 times. The system kept sending messages it will be earlier at 4am and eventually the flight was at 9am I didn’t sleep all night because of that

Needs better seat for business class. My seat was falling apart. Also no WiFi on that flight

Boarding catastrophic let alone have to claimb the plain rather than using jetway. 5.5 hr delay leaving had to do stop in Lgw for a new crew which further compounded the delay. Connecting flight would not wait and had to pend a night in a hotel. Curiously my seat would not go full flat.

Good. The food was very bad. Except for the chicken rice, rest of the dish went to trash.

In never flown this flight, because my flight coning from Barcelona was delayed.

With a 4 hour delay its was a very basic flight which was just bearable. We were offered food vouchers for the delay and then they didnt work, so that was annoying. Also poor communication about the delay which got pushed out 3 times.

This is really the rating of two flights. JFK to IST then IST to NQZ. New York to Istanbul was good. Good crew and all positives. The flight to Astana was so bad that brought it all down. Crew was nonexistent above the minimum, seats were cramped, and it was hot on the plane. Turkish Airlines seems to be slipping down to US based carriers level.

Took forever to board. They made announcements without the loudspeaker and since the waiting room was full of screaming kids, no one could hear what they were saying. The business class sleeper seats were designed for tall skinny people. When partially reclined there was nowhere to rest my feet because they did not reach the footrest. and when fully reclined there wasn't room at my sides for my arms. Definitely one of the worst sleeper seats I have ever had.

The business class seats are designed for someone taller than I am, so my feet were dangling (the footrest was just a smidge too low). Which caused problems with my sciatic nerve and made for a long uncomfortable flight.

Bad experience; they are not good anymore. They charge too much for luggage seat are so uncomfortable, Flight delays which may miss your next flight, they don’t care if you miss the flight or not. Zero customer services for front desk representatives Istanbul's airport I’m not using this airline any more.

This flight was in the air when the national power outage happened on 28 April 2025 in Spain and Portugal. As a result Lisbon airport was closed and the flight was diverted to Porto. There were no phones, internet or ATMs working and the Turkish Airlines ground crew in Porto were trying to find alternative transport to Lisbon (by bus). This did not materialise until late in the evening. The Turkish Airlines ground crew suggested that passengers may find their own way of getting to Lisbon. That in itself is a failure of Turkish Airlines, but understandable as there were no means of communication. The Turkish Airlines ground crew also said that any expenses insured for travel to Lisbon will be refunded by the Airline through their website. Unfortunately, I could find no way to travel back to Lisbon other than to hitch hike with an Uber driver. Because no systems were available and no credit card payment possible I paid the driver 140 Euros in cash with no receipt as systems were down. I arrived at my Lisbon hotel at 23:30 (flight was scheduled to land at 12:30). Upon contacting Turkish Airlines for compensation they are not willing to do anything as I do not have an invoice for my expenses. They do not even consider the 10 hours of delay and inactivity on their part as a reason to provide any sort of curtesy towards me. I find their behaviour appalling.

Aircraft you use on this route are always old and poor! This drives the entire experience down

All was fine , but air conditioning was not working on board properly so was very hot

Very punctual, the onboard staff was friendly and correct, the flight was fortunately very calm, the toilets were clean, in short, an excellent experience Thanks

Great food, great entertainment and very helpful, caring & attentive staff.

Hate their old flights, boatding, food and services. Very poor quality

very small seats the scree did not work. I could not watch anything for 9 hours.

Never happened. Flight was delayed. Had to be re rojyed

I was very grateful for Lufthansa's role in organizing mobility support. The touchscreen on my seat was faulty: slow, stained (I couldn't get it clean), and glitchy. This made selecting movies extremely time consuming, and twice I had to start all over from the beginning.

The booking I made 2 months in advance got changed the week before with another flight and had to pay more for seats and luggage. Not to mention hours and hours on hold to make sure my flight is still booked.

The flight was cancelled due to tech problem with the plane

No entertainment since it was a 3 hr flight. Good leg room for economy.

Crew was not happy. Very uncomfortable seats. When person leans back in front of you the screen is too close to me. Food was awful.

Our flights were severely delayed, then canceled and we had to fly out next day with no sleep accommodation help. This led to our baggage being lost and the service reps after baggage couldn’t be bothered to help. They kept sending us to different counters when we were at the right counter to begin with. The only saving grace was the angel woman supervisor with blond hair who helped us put in a missing baggage claim.

The service was really good. The breakfast food could’ve been better as I don’t eat sweets for breakfast and the only choice was a muffin. Overall, good experience though. Thank you.

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