$631 Find Cheap Flights from Ireland to Sydney

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 7/9. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Sydney, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Sydney, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Ireland to Sydney

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

Wed, 9 Sep - Wed, 18 Nov
China Eastern Logo
10:55 - 12:35
DUB
-
SYD
40h 40m
1 stop
China Eastern Logo
21:30 - 06:15
SYD
-
DUB
43h 45m
1 stop
$1,132China Eastern
Mon, 7 Sep - Sun, 15 Nov
China Eastern Logo
10:55 - 09:00
DUB
-
SYD
37h 05m
1 stop
China Eastern Logo
12:00 - 06:15
SYD
-
DUB
29h 15m
1 stop
$1,151China Eastern
Fri, 30 Oct - Tue, 3 Nov
British Airways Logo
07:40 - 07:55
ORK
-
SYD
37h 15m
2 stops
British Airways Logo
11:15 - 21:00
SYD
-
ORK
44h 45m
2 stops
$1,895British Airways
Fri, 30 Oct - Tue, 3 Nov
British Airways Logo
11:55 - 06:55
ORK
-
SYD
32h 00m
2 stops
British Airways Logo
11:15 - 15:25
SYD
-
ORK
39h 10m
2 stops
$1,929British Airways
Tue, 1 Sep - Fri, 18 Sep
Multiple Airlines Logo
08:10 - 19:25
ORK
-
SYD
26h 15m
2 stops
Multiple Airlines Logo
15:40 - 10:45
SYD
-
ORK
28h 05m
2 stops
$2,042Multiple Airlines
Sun, 5 Jul - Sun, 12 Jul
Air France Logo
15:10 - 18:00
ORK
-
SYD
41h 50m
2 stops
Air France Logo
11:15 - 14:40
SYD
-
ORK
36h 25m
2 stops
$2,246Air France
Sun, 5 Jul - Sun, 12 Jul
Air France Logo
15:10 - 18:00
ORK
-
SYD
41h 50m
2 stops
Air France Logo
11:15 - 14:40
SYD
-
ORK
36h 25m
2 stops
$2,252Air France
Fri, 27 Nov - Fri, 8 Jan
Multiple Airlines Logo
14:40 - 13:35
ORK
-
SYD
35h 55m
2 stops
Multiple Airlines Logo
10:45 - 19:25
SYD
-
ORK
43h 40m
3 stops
$2,386Multiple Airlines
Sat, 22 Aug - Mon, 31 Aug
United Airlines Logo
09:30 - 07:00
SNN
-
SYD
36h 30m
2 stops
United Airlines Logo
10:20 - 10:15
SYD
-
SNN
56h 55m
2 stops
$2,743United Airlines
Sat, 22 Aug - Mon, 31 Aug
United Airlines Logo
09:30 - 07:00
SNN
-
SYD
36h 30m
2 stops
United Airlines Logo
10:20 - 10:15
SYD
-
SNN
56h 55m
2 stops
$2,744United Airlines
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 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 August, where tickets cost $721 on average for return flights. On the other hand, the most expensive months are July and January, where the average cost of tickets from Ireland is $1,712 and $1,575 respectively. For one-way flights, the best month to travel is December with an average price of $618.

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 4 weeks before departure, which saves you about 8% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonJune
Cheapest flight$631
Best time to beat the crowds (17% less expensive on average)
Most popular time to fly (22% more expensive on average)
Flight from Dublin to Sydney

FAQs - booking Sydney flights

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

    Sydney Kingsford Smith Airport is 7 km from the centre of Sydney.

  • What is the name of Sydney’s airport?

    All flights to Sydney land at Sydney Kingsford Smith Airport. The airport code is SYD,and it can also be referred to 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 8,179 direct flights from within Ireland to Sydney. The most common day for departures is Friday, with 16% 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 airlines flying from Ireland 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 Ireland 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
Qatar AirwaysOverall score based on 3730 reviews
7.5Boarding
7.3Comfort
7.3Entertainment
7.3Food
7.9Crew
Airline reviews

checkin and boarding were good. Lounge was pathetic. All empty seats were having reserved tag, was very warm inside the lounge so basically we didnt utilise. The flight was A320, we blocked row 1 in economy assuming leg space will be sufficient. But it was OK, nothing great compared tot he first row of Air Arabia which we took for our trip. The food was horrible, i had the beed fwith mash potatoes. No salt, no spices nothing.

8.0 ExcellentAjesh, June 2026
TBS - DOH
Read more Qatar Airways reviews

checkin and boarding were good. Lounge was pathetic. All empty seats were having reserved tag, was very warm inside the lounge so basically we didnt utilise. The flight was A320, we blocked row 1 in economy assuming leg space will be sufficient. But it was OK, nothing great compared tot he first row of Air Arabia which we took for our trip. The food was horrible, i had the beed fwith mash potatoes. No salt, no spices nothing.

Flight canceled twice. Second cancellation with no notice. Qatar only got me to Copenhagen even thou flight from Copenhagen to Helsinki was code shared with QR they made me purchase a separate ticket for over 200€. At check in only 1 check in was allowed. I had to argue with staff to allow the second, carry-on sized, bag to be checked in for free. My original tix allowed 2 full size luggage as checked luggage. My 14+hr flight turned into a 60+ hr journey. 😢

Flight canceled by JetBlue for no reason. No good alternatives provided.

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

Qatar Airways has gone down over the last few years.

Amazing airline accommodations. The cabins were so great. The food was very good and the flight attendants were so nice. Made a 15 hour flight seem easy.

My journey with Qatar Airways from Ahmedabad to Jacksonville on 3rd February 2026 was truly exceptional. The entire experience reflected comfort, care, and world-class service. Complimentary high-quality Wi-Fi throughout the journey was a welcome luxury, especially on a long-haul flight. The vegetarian meals were thoughtfully prepared, delicious, and served with attention to detail, along with a fine selection of snacks and beverages. What truly elevated the experience was the cabin crew — graceful, courteous, and genuinely attentive, delivering outstanding hospitality at every step. This journey perfectly showcased the premium standard Qatar Airways is known for, and it left a lasting impression. I would gladly fly with them again.

First off, it wasn't clear that my first flight was to be operated by IndiGO. While the flight itself was fine, this meant that my whole initial check in where I would've properly verified my seating on my Qatar flight/requested an upgrade was impeded by the fact that I had to check in with IndiGO. They said I would separately have to go to Qatar counter to deal with second flight leg issues, which was impossible given how long the check in took/no time available to do so.

This flight was a very good trip for us. The crew were very friendly and helpful. They made arrangements for my husband to have assistance in boarding. We were not expecting a meal, so it was a pleasant surprise on this short flight to have a meal and beverage from a very courteous crew.

The seat cushions are absolutely lacking, not sure if they know the passengers are traveling for 14 hours straight, but the padding made our back and butt ache like crazy. The entertainment console had its own problems, either the headphone jack wasn't working or the power outlet via usb or ac outlet was not working. Not to mention the seat handles were not adjustable in some planes in the middle or on the aisle. Qatar/Indigo may be operating a very old fleet of planes to make as much profit as possible, but passengers may not be following them for long, should this treatment of its customers continue. Qatar/Indigo, wake up and do it right by your customers, or they may not be your customers anymore.

Very disappointed to not have lounge access The shorter flight seats were uncomfortable

Seats were very comfortable and the staff too was very friendly.

I booked tickets for a family of five and specifically paid extra to select our seats together. We spent nearly $1,000 extra (around $100 per seat) for extra legroom so we could sit near each other. However, despite paying for this, we ended up being separated on the flight. This caused a major issue for our family because my parents do not speak English and rely on me to translate and assist them during the journey. I do not understand why Etihad changed our reserved seats without explanation. I am extremely dissatisfied with this experience. I expect the airline to do better, and I am requesting a full refund for the seat selection fees we paid.

1 hour delay meant missed my connecting flight and 1st day of holiday

Unfortunately the flight was cancelled so I never got to go

Awful the whole airline arrived to check baggage and board our flight and the airline desk was closed where none of the passengers could check in baggage, asked for a supervisor and was refused a supervisor, called the airlines from the airport and they refused to refund the flights for their actions in the airport, Etihad and Garuda Airlines absolutely horrible customer service all the way around.

Good one but just notice that you have to ask several time to get water or coffee .

Early arrival. Good boarding. Deplaning this flight is very slow both coming and going. Baggage arrived quickly for Pearson

Dirty and smelly lavatory and toilets in Wamos Air operated flights

We have paid premium price for a business class Cabinet and we have received the old 777 with the following apart business class that is not to standard. It was very disappointing and it’s a very bad reputation for a premium airline company. This aeroplane should be the commission from being as a business class. We will pass this knowledge to our colleagues because the quality of business class in Etihad is not consistent and it is a lucky dip that sometimes you’re getting a good aeroplane and sometimes you’re getting their 30 years old aeroplane. The crew of the aeroplane have apologise and said that they hate this aeroplane and they have complained about it multiple times as well. Obviously Etihad is putting the economy in front of the Customer Experience. For the future we will not take this risk anymore and will fly with established company like emirates.

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Wollongong
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Everything you need to know for your flight to Sydney

Information on the airport you'll fly into in Sydney