SYD - OPO

$892 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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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

Thu, 14 Aug - Thu, 18 Sep
 Logo
21:15 - 22:05SYD-OPO
33h 50m3 stops
 Logo
10:25 - 09:45OPO-SYD
38h 20m3 stops
$1,788
Find Deal
Tue, 9 Sep - Mon, 29 Sep
Turkish Airlines Logo
20:55 - 10:05SYD-OPO
46h 10m2 stops
Turkish Airlines Logo
10:55 - 19:00OPO-SYD
47h 05m2 stops
$1,922Turkish Airlines
Find Deal
Thu, 31 Jul - Thu, 11 Sep
Etihad Airways Logo
21:30 - 06:50SYD-OPO
42h 20m2 stops
Etihad Airways Logo
16:05 - 16:55OPO-SYD
39h 50m2 stops
$1,940Etihad Airways
Find Deal
Sat, 19 Jul - Fri, 26 Sep
Etihad Airways Logo
21:30 - 10:50SYD-OPO
46h 20m2 stops
Etihad Airways Logo
16:05 - 06:10OPO-SYD
29h 05m2 stops
$2,237Etihad Airways
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Sat, 6 Sep - Sun, 28 Sep
KLM Logo
06:15 - 10:40SYD-OPO
37h 25m3 stops
KLM Logo
16:20 - 10:00OPO-SYD
32h 40m2 stops
$2,653KLM
Find Deal
Sat, 6 Sep - Mon, 29 Sep
KLM Logo
10:20 - 08:25SYD-OPO
31h 05m2 stops
KLM Logo
16:20 - 09:45OPO-SYD
32h 25m3 stops
$2,795KLM
Find Deal
Tue, 7 Oct - Thu, 23 Oct
Emirates Logo
06:00 - 22:55SYD-OPO
26h 55m2 stops
Emirates Logo
18:05 - 07:05OPO-SYD
27h 00m2 stops
$5,600Emirates
Find Deal
Tue, 7 Oct - Thu, 23 Oct
Emirates Logo
06:00 - 22:55SYD-OPO
26h 55m2 stops
Emirates Logo
10:00 - 22:25OPO-SYD
26h 25m2 stops
$5,605Emirates
Find Deal
Sun, 27 Jul - Sat, 2 Aug
SWISS Logo
11:00 - 17:20SYD-OPO
39h 20m2 stops
SWISS Logo
03:05 - 05:55OPO-SYD
41h 50m2 stops
$7,367SWISS
Find Deal
Fri, 15 Aug - Sat, 30 Aug
SWISS Logo
07:55 - 11:25SYD-OPO
36h 30m2 stops
SWISS Logo
12:15 - 05:55OPO-SYD
32h 40m2 stops
$8,428SWISS
Find Deal
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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.

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 March, where tickets cost $1,810 (return) on average. On the other hand, the most expensive months are December and April, where the average cost of round-trip tickets is $2,952 and $2,488 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 10 weeks before departure. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.


Good to know

Low seasonMarch
High seasonJuly
Cheapest flight$892
Best time to beat the crowds (17% less expensive on average)
Most popular time to fly (5% 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 $581 for a one-way ticket and $1,165 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, oneworld, and SkyTeam are the airline alliances operating flights between Sydney and Porto, with Star Alliance being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from Sydney to Porto are Emirates and KLM. With an average price for the route of $3,775 and an overall rating of 8.1, Emirates is the most popular choice. KLM is also a great choice for the route, with an average price of $2,664 and an overall rating of 7.8.

  • 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.

Top 5 airlines serving 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.
7.8
KLMOverall score based on 1358 reviews
7.1Entertainment
7.8Boarding
7.2Food
7.7Comfort
8.4Crew
Airline reviews

Klm start boarding while somw air issue in the plan

8.0 ExcellentA, June 2025AMS - YYZ
Read more KLM reviews

Klm start boarding while somw air issue in the plan

The service was great. However the lounge only gets passing grade

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

You should not have to pay for WiFi in business class

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

I flew premium economy and this was a good option. Although the seats didn’t recline much, I was able to get some sleep with my head propped against the window. The food was good and the entertainment was wonderful The staff were very attentive and professional

Overall very poor. Flight was disorganised, staff were rude and this is my second experience with KLM that I've had baggage go missing. It feels like, if you are an economy customer, KLM staff do not show you any care. I shall never fly with KLM again. Worst airline in Europe

Great boarding, great short flight but no entertainment whatsoever and no wifi. Prepare to disembark by a staircase.

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.

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

PLEASE DONT TAKE FORCEFULLY(SIZE APPROPRIATE) CARRY ONS FROM PASSENGERS WHO FOR SOME REASON NEED TO KEEP IT

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.

-Swiss airlines online check in app crashed multiple times -Zurich airport does not have very many bathrooms accessible to people with disabilities - closest disability accessible bathroom to departure gate was 1/4 mile away.

We are glinting with united , but over all very disappointed

It is a good airlines, very professional very good food. I wish they offered free luggage is the only thing.

Everything was great except food . It as okay not good not bad

Flight attendant served beverage to everyone during meal service and forgot about me. Had to call her several times until she realized it. Not a good service for a business class flight

Edelweiss is now Nickle&dimming, not even a complimentary wine on the intercontinental flight. Sitting space is the smallest I have ever seen.

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.

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.

I had first class service from them. A little late taking off, but no major problem

No towels or tissue and chocolate and mint provided before arrival

It was a really long flight from Doha to Philadelphia and it was overall a good one. The one area that I would comment on is that there is a lot of single-use plastic and disposables in the meal service for American Airlines. It would be great to see more circular options in the meal service to reduce the amount of waste.

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.

My wife and 7 months old baby had a terrible experience traveling, we paid extra for bassinet they didn’t provided.she missed her flight due to late landing of the flight, they were unsupportive to my family due to that my wife and kid suffered a lot.

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

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

Very nice and friendly crew. Boarding system can be improved.

Turkish Airlines overbooked the flight and they did not allow me to board the flight even though I had the proper boarding pass and was at the gate on time. Simply unacceptable.

The fully flat bed in business class on the 777 is a little narrow, and the 2-3-2 configuration is now dated, but otherwise a comfortable and pleasant flight. It’s hard to beat the value too.

they have cancell the flight with no reasons, My parents were in the cold weather in the airport for 24 hours they did not give any hotel and food. I hate Turkish Airline, this is our last time that we ha ve chosen Turkish Airline.

Turkish Airlines is amazing. I have a problem with the ticket I purchased through the kayak website. I have filed a complaint related to the fact that I was contacted by phone on the day I purchased the ticket and told that the amount that the ticket had been advertised for was not accurate and that I had to pay more. This is totally fraudulent. I will look into addressing this further tomorrow and will never ever use kayak again.

I liked the ability to walk and stand in the crew area. I hated the security check experience before boarding. The airport staff were so rude, yelling at us unnecessarily, delaying us on purpose, and even threatening to call the police on us!

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.

We boarded the plane and waited for 30 minutes ultimately for them to cancel the flight due to engineering issues.

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.

Seats were extremely hard and uncomfortable. as well as very narrow even though I paid an extra $230 for upgraded preferred seats. Very disappointed in the downtrend of Lufthansa and United Airlines.

Service was courteous and attentive. Sat in the exit row. In exchange for leg room I had people tripping over my feet to use it at a hallway from one aisle to the other, had no access to films viaa viewscreen and no underseat storage for medicines or other personal travel needs. Next time I am seated there, I will refuse the exit row.

Using the media screen in economy class is a disaster

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