SYD - OPO

$867 Find Cheap Flights from Sydney to Porto – 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 from Sydney to Porto departing on 18/8. 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.
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Everything you should know

Cheapest return fare
$1,784
Etihad Airways
Tue 17/11Sat 21/11
SYD - OPO • 2 stops
Cheapest one-way flight
$883
Typical prices: $960-$1,326
Multiple Airlines
Tue 18/8
SYD - OPO • 3 stops
Top airlines
Cheapest • from $1,784 (return)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between Sydney and Porto. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Porto!
Flight Deals
Booking Insights
Flight 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

Tue, 17 Nov - Sat, 21 Nov
Etihad Airways Logo
21:30 - 15:15
SYD
-
OPO
52h 45m
2 stops
Etihad Airways Logo
11:35 - 06:30
OPO
-
SYD
31h 55m
2 stops
$1,784Etihad Airways
Tue, 17 Nov - Sat, 21 Nov
Etihad Airways Logo
21:30 - 15:15
SYD
-
OPO
52h 45m
2 stops
Etihad Airways Logo
11:35 - 06:30
OPO
-
SYD
31h 55m
2 stops
$1,786Etihad Airways
Sat, 12 Sep - Sat, 26 Sep
Multiple Airlines Logo
14:35 - 20:40
SYD
-
OPO
39h 05m
2 stops
Multiple Airlines Logo
10:40 - 06:25
OPO
-
SYD
34h 45m
2 stops
$1,827Multiple Airlines
Wed, 11 Nov - Sun, 15 Nov
Etihad Airways Logo
16:50 - 15:15
SYD
-
OPO
33h 25m
2 stops
Etihad Airways Logo
11:35 - 06:30
OPO
-
SYD
31h 55m
2 stops
$1,854Etihad Airways
Sun, 6 Sep - Sat, 26 Sep
Multiple Airlines Logo
09:50 - 20:35
SYD
-
OPO
43h 45m
2 stops
Multiple Airlines Logo
10:40 - 06:25
OPO
-
SYD
34h 45m
2 stops
$1,901Multiple Airlines
Sun, 6 Sep - Sat, 26 Sep
Multiple Airlines Logo
09:50 - 20:35
SYD
-
OPO
43h 45m
2 stops
Multiple Airlines Logo
10:40 - 06:25
OPO
-
SYD
34h 45m
2 stops
$1,907Multiple Airlines
Tue, 15 Sep - Tue, 22 Sep
Turkish Airlines Logo
21:05 - 15:40
SYD
-
OPO
27h 35m
2 stops
Turkish Airlines Logo
10:40 - 19:10
OPO
-
SYD
47h 30m
2 stops
$1,950Turkish Airlines
Tue, 15 Sep - Tue, 22 Sep
Turkish Airlines Logo
21:05 - 15:40
SYD
-
OPO
27h 35m
2 stops
Turkish Airlines Logo
10:40 - 19:10
OPO
-
SYD
47h 30m
2 stops
$1,961Turkish Airlines
Mon, 14 Dec - Sun, 27 Dec
KLM Logo
12:45 - 10:30
SYD
-
OPO
32h 45m
3 stops
KLM Logo
11:15 - 07:25
OPO
-
SYD
33h 10m
3 stops
$5,173KLM
Sun, 6 Sep - Sun, 27 Sep
KLM Logo
11:40 - 10:40
SYD
-
OPO
32h 00m
3 stops
KLM Logo
16:20 - 06:30
OPO
-
SYD
29h 10m
3 stops
$5,175KLM
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 return flight from Sydney to Porto?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Sydney to Porto departing in November.

Flight prices are below average for this route right now.

Flights to Porto from Sydney usually cost between $2,402 and $2,904 in November.
The lowest price found in the past 5 days was $1,784 on Etihad Airways (17 Nov–21 Nov).

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 November, where tickets cost $0 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is $2,877 and $2,643 respectively.

Good to know

Low season

February

Cheapest flight

$867
Best time to beat the crowds (26% less expensive on average)
Most popular time to fly and prices are also 6% lower 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 5 days, the lowest price for a flight from Sydney to Porto was $867 for a one-way ticket and $1,784 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?

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

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

    The two airlines most popular with KAYAK users for flights from Sydney to Porto are Japan Airlines and KLM. With an average price for the route of $1,628 and an overall rating of 8.3, Japan Airlines is the most popular choice. KLM is also a great choice for the route, with an average price of $2,723 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.

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.
7.8
KLMOverall score based on 1552 reviews
7.2Entertainment
7.7Comfort
7.8Boarding
8.4Crew
7.3Food
Airline reviews

I did not use entertainment on board, so, cannot really evaluate. the flight was fine.

10.0 ExcellentEleonora, June 2026
AMS - PRG
Read more KLM reviews

I did not use entertainment on board, so, cannot really evaluate. the flight was fine.

There were no charge points for phones on the economy seats. The seats were comfortable overall. Food was okay.. flight was on time

It was really nice experience by flying this klm flight.I personally recommend everyone to please try this klm flight

Empty seats next to me - wish it had been for a longer flight!!

Couldn’t get boarding pass in SLC even with help from a redcoat, so had to find a desk in AMS to get boarding pass. Technical problems so not sure why. Very inconvenient. The KLM app is not as user friendly as most apps. Also had to wait almost an hour on the tarmac for a fuel truck, which caused us to miss a connecting bus in LUX.

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

Transavia flight, was booked as KLM but i couldnt select seat or access boarding pass with KLM at all. Crammed seating and very no frills experience all around. First and last time.

Transavia flight. Couldn't select seat or anything prior to flight. No connection with klm systems. Seats are very crammed. Extremely no frills.

KLM is my favourite airline. Never ever let us down.Staff are first class.

We left one hour late because of technical difficulties. The economy comfort seats are great for the price. The crew was mediocre, they do not provide a pleasant experience, they just deliver food and drinks and give orders, not very amicable, no service and hospitality focus.

The check-in at the airport was smooth and helpful. There was a delay due to some issue. The good regular but the staff very attentive.

I don’t like that an equipment change caused my seat to change from 23A to 44A. The boarding was also delayed. The crew were excellent, however and very attentive. The food was not bad.

Excellent, Lima to Paris. But Paris to Amsterdam, delayed, missed my flight and KLM treated its missed flights passengers very badly, terribly bad. No hotel accommodation given. Passengers were told to find their own hotel accommodation and claim at reasonable rate and left the booth and literally with armed Police Officers listening to passengers complains. For three hours, after moving by Uber from hotel to hotel and calling and booking online, no hotel was available. I had to return to the airport and seat/sleep on the benches, suffering the cold, and rats running around until my new allocated flight the next day. It was the most terrible KLM treatment even seen and being a Business Class passenger. Still mentally suffering to date as a result.

I don't understand the concept of paying to get your personal luggage onboard and then asked to check it in.... either sell the space or don't, its a hassle to carry those all through the airport just to make a check in at the last minute.

Much better than the major US Carriers especially in Biz Class.

The male attended that served are section was a snob. He did not answer my call light when my wine spilled all over the floor. I did not push it again or drew his attention to it. He just ignored the call light when he came to give us our meal, serving the people behind us first. I did not push it again or drew his attention to it to see his reaction. It was so obvious that he was ignoring us. We were in premium economy!

Not a good one this time. The absence of internet without any information/notification ahead was really the unacceptable part. Also this new A350-900 has a serious legroom challenge for economy seats. It’s more like a medium-haul flight legroom configuration.

Very good crew. Food service above average. Seats very small for a 12 hours flight.

Good aorcraft 777 but Worst food ever Breakfast was a bû’with matonnaise… Staff was nice but invisible most of the flight

Everything went smoothly with Air France. There was a delay in departure which seemed to relate to the immigration services being short staffed.

Overall the crew were friendlier than similar premium airlines like Cathay or Singapore. Seat was good. Food was excellent.. the starlink wifi was a real plus. The entertainment was just ok.

Very poor No information given to why we turned around.. No one at airport to help

Friendly and discreet staff. Could have done with a few more offers of water/snacks overnight. Movie and tv selection notably poor. Seats not especially comfortable

The check-in and crew staff were wonderful. The food was reasonable. The online side Qatar was very poor. Seats were very tight and not very comfortable for a 14 hour flight!

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.

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.

I found it weird that the quality of the flight different from Australia to Doha than the Doha to Berlin leg. The quality of the toiletries pack (was in a box from Australia) and then a proper bag from Doha. The biggest variation was the inflight entertainment, which had a significantly shorter amount of content compared to the Doha flight. My QSuite seat was also broken and did not recline all the way flat. Wasn’t the best and I wouldn’t be happy if I’d paid cash for the flight.

The plane from Dublin to Doha was quite comfortable. I was in economy and the seats and rows were very tight. The man in front of me reclined his seat and it made my screen incredibly close to my face and I wasn’t able to take my tray down and my knees were pressed against the seat. I had to ask three times for him to pull his seat up but in his defence he hadn’t even reclined it far, the rows were just too close. I had a pain in my side by the end of the flight from the chairs which were quite worn and not very padded or supportive. It was a significantly inferior plane to the plane from Doha to Sydney and vice versa.

Ordinary Indian food... Not great. Limited movie and TV selection

Crew members service are at its best Seating area is very compact, could be better

it was great honestly for the melbourne flight a kit with blindfold and slippers was probided to each passenger on the seat and the food was really great will definitely recommend people take turkish airlines for travel not just on the sin-melbourne route.

the flight was cancelled and I was rebooked twice, once 26 hours later, then another 24 hours later. In total the flight was delayed for 40 hours. Never again will I use kayak or Turkish Airlines for my travel.

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

Stale, bad and limited food, drink options. Entertainment system was broken, old and had barely any latest contents.

On my flight the menus showed different food and different was available. I think that was a miscommunication maybe. Other than that flight was wonderful.

I could not check in online 24 hours before the flight. Very inconvenient. Flight was delayed.

There many good things about the flight but What could be better is the seat room after a chair reclines in the row ahead of you.

The cabin crew was excellent. They were fully staffed and very helpful. The food on the fight was quite good for surpassing my expectations of “airline food“

I would fly with them again in a heartbeat. Everything was smooth. Even when there was a 3 hour delay on my flight, by the time I had landed they had already rebooked my flight and reassured me my luggage would be on the new flight. The food was great, the staff were great, Istanbul was great, Overall, I would fly with them again and recommend them to others.

On time and no hassle luggage policy (2 checked in and 1 cabin bag)

i have book the flight with baggage. and i have paid $800.00 for the baggage. when i contacted to JUSTFLY Costumer Service they told me that my baggage was included in the booking. then why i have to pay. i am going to file a complain against it. $800.00 is not at all small amount

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

I was charged $604 for a bag that weighed 17 kg. I was given three different prices until they landed on the most expensive one and didn't budge a penny. It's ironic and a bit enraging because the total cost of my ticket was $468. I've traveled the world and never experienced these kind of prices for only one piece of checked luggage.

The check-in has been the very best so far I didn't get to use my priority access which made me feel like a paid a higher price with no benefit for that I loved the food Very tasty and hot The staff friendliness, empathy could be better as it was not linear amongst the whole crew Otherwise, no complaints. I'd still fly again via Etihad Great prices despite the long 6h of waiting time

Liked leg room Disliked unable to book to sit with my family on same flight without paying extra

1st time with. Etihad Airways and it was amazing from check in to crew. Great flight.

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.

Dear Etihad Airways Customer Service, I hope this message finds you well. I am writing to express my deep disappointment with my recent flight experience on Etihad Airways, which took me from India to NYC via Abu Dhabi. My flight details are as follows: [Flight Number] on [Date]. My overall experience was marred by a series of significant issues that I believe warrant attention and improvement. These issues include: Bad Conditions of Washroom: The state of the washrooms on the flight was far from satisfactory. They were inadequately maintained and lacked the level of cleanliness one would expect during a long-haul journey. Seating Space and Comfort: The seating arrangement left much to be desired. The seats were cramped, uncomfortable, and the legroom was insufficient for such a long flight. The seats did not recline as expected, making the journey quite uncomfortable. Cabin Cleanliness: The cleanliness of the cabin, including seats and tray tables, was not up to par. The lack of cleanliness impacted the overall comfort and satisfaction of passengers. Excessive Noise: The flight was notably noisy, with disturbances and loud noises making it difficult to rest or concentrate. The noise levels were considerably disruptive. Food and Catering: The quality and variety of meals served on the flight left much to be desired. Furthermore, there were issues with accommodating dietary restrictions, which is crucial for passenger satisfaction. Hygiene and Sanitary Facilities: The condition of the restrooms was subpar, and essential hygiene supplies were not adequately provided. This falls short of expectations for a long-haul journey. Overall Experience: Regrettably, the combination of these issues significantly affected my overall experience during this long flight, making it far from the comfortable and enjoyable journey I had anticipated. I understand that maintaining high standards on long-haul flights can be challenging, but I believe it's vital to bring these concerns to your attention in the hope that they can be addressed and improved upon in the future. As a loyal Etihad Airways customer, I had higher expectations for my journey. I kindly request that you take these issues into consideration and work towards enhancing the overall passenger experience on similar routes. Your attention to these matters is greatly appreciated. Thank you for your time and understanding.

The legs room was not enough at all. The seats are not comfortable enough for long journey but other than that it was very good

Everything you need to know for your flight from Sydney to Porto

Information on your arrival and departure airports