SEA - SYD

$570 Find Cheap Flights from Seattle 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 from Seattle to Sydney departing on 8/25. 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 in flight searches from Seattle to Sydney.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Sydney.
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Everything you should know

Cheapest round-trip
$1,026
Typical prices: $1,284-$872
Air Canada
Sun 6/21Tue 7/7
SEA - SYD • 1 stop
Cheapest one-way
$570
Typical prices: $414-$630
Multiple Airlines
Tue 8/25
SEA - SYD • 3 stops
Top airlines
Cheapest • from $1,026 (round-trip)
Best reviews • 8.3 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between Seattle and Sydney. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $767 (round-trip)
Shortest trip • 19h 20m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 25% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Sydney (SEA-SYD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle 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 round-trip flight deals from Seattle to Sydney

Sun, Jun 21 - Tue, Jul 7
Air Canada Logo
3:00 pm - 7:20 am
SEA
-
SYD
23h 20m
1 stop
Air Canada Logo
9:20 am - 10:07 am
SYD
-
SEA
17h 47m
1 stop
$1,026Air Canada
Sun, Jun 21 - Tue, Jul 7
Air Canada Logo
3:00 pm - 7:20 am
SEA
-
SYD
23h 20m
1 stop
Air Canada Logo
9:20 am - 6:32 pm
SYD
-
SEA
26h 12m
1 stop
$1,035Air Canada
Sun, Jun 21 - Tue, Jul 7
Air Canada Logo
3:00 pm - 7:20 am
SEA
-
SYD
23h 20m
1 stop
Air Canada Logo
9:20 am - 10:07 am
SYD
-
SEA
17h 47m
1 stop
$1,040Air Canada
Sun, Jun 21 - Tue, Jul 7
Air Canada Logo
3:00 pm - 7:20 am
SEA
-
SYD
23h 20m
1 stop
Air Canada Logo
9:20 am - 10:07 am
SYD
-
SEA
17h 47m
1 stop
$1,041Air Canada
Sun, Jun 21 - Tue, Jul 7
Multiple Airlines Logo
7:20 pm - 12:40 pm
SEA
-
SYD
24h 20m
2 stops
Multiple Airlines Logo
9:20 am - 10:07 am
SYD
-
SEA
17h 47m
1 stop
$1,042Multiple Airlines
Sun, Jun 21 - Tue, Jul 7
Air Canada Logo
3:00 pm - 7:20 am
SEA
-
SYD
23h 20m
1 stop
Air Canada Logo
9:20 am - 6:32 pm
SYD
-
SEA
26h 12m
1 stop
$1,043Air Canada
Sun, Aug 9 - Sun, Aug 16
Air Canada Logo
5:45 am - 7:20 am
SEA
-
SYD
32h 35m
1 stop
Air Canada Logo
9:20 am - 2:22 pm
SYD
-
SEA
22h 02m
1 stop
$1,046Air Canada
Sun, Aug 9 - Sun, Aug 16
Air Canada Logo
7:20 pm - 7:20 am
SEA
-
SYD
19h 00m
1 stop
Air Canada Logo
9:20 am - 10:07 am
SYD
-
SEA
17h 47m
1 stop
$1,056Air Canada
Wed, Nov 11 - Mon, Nov 30
Air Canada Logo
10:10 am - 9:35 am
SEA
-
SYD
28h 25m
1 stop
Air Canada Logo
11:20 am - 6:22 pm
SYD
-
SEA
26h 02m
1 stop
$1,058Air Canada
Wed, Nov 11 - Mon, Nov 30
Air Canada Logo
10:10 am - 9:35 am
SEA
-
SYD
28h 25m
1 stop
Air Canada Logo
11:20 am - 6:22 pm
SYD
-
SEA
26h 02m
1 stop
$1,059Air Canada
Booking Insights

KAYAK's insights & trends for Seattle to Sydney flights

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

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

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Sydney departing in June.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle 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 from Seattle to Sydney is August, where tickets cost $792 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $1,611 and $1,283 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle 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 on the flight from Seattle to Sydney, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonMarch
Cheapest flight$570
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 53% increase in price.
Flight from Seattle to Sydney

When to book flights from Seattle to Sydney

Are your dates flexible? Find out the best times to travel from Seattle to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 Seattle to Sydney

  • Are there direct flights from Seattle to Sydney?

    Yes, there are direct flights from Seattle/Tacoma International (SEA) to Sydney/Kingsford Smith (SYD). There is a range of direct flights to choose from, such as Delta, Hawaiian, Fiji Airways, and many more. However, there are several indirect flights to choose from if you are looking for a cheaper flight.

  • Are there any hotels in Sydney Airport (SYD)?

    Yes, there are multiple hotels near and at the airport in Sydney that also provides shuttle services to and from the airport. If you can't stay outside, look no further than the hotels at the airport. These include Rydges Sydney Airport Hotel, Citadines Connect Airport Hotel, and Travelodge Hotel Sydney Airport.

  • What is the best way to get to Sydney CBD from SYD?

    There are several ways to get to Sydney CBD from the airport. You can use a train which will take about 17min or rideshare app services which will take 20min. Alternatively, you can take public transport, a bus which will take 28mins.

  • What is the best way to get to SEA from downtown Seattle?

    It takes about 20min to get to SEA from downtown Seattle by bus. You can order a taxi or use a shuttle. The shuttle runs from the terminals at regular intervals between SEA and downtown.

  • What is the cheapest flight from Seattle to Sydney?

    In the last 5 days, the lowest price for a flight from Seattle to Sydney was $570 for a one-way ticket and $1,026 for a round-trip.

  • Do I need a passport to fly between Seattle and Sydney?

    Yes

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

    On your way to Sydney, you’ll fly out from Seattle/Tacoma Intl. You’ll be landing at Sydney Kingsford Smith.

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

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

  • Which airline alliances offer flights from Seattle to Sydney?

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

  • What is the most popular layover when flying to Sydney from Seattle?

    Los Angeles is the most popular layover city among KAYAK users traveling from Seattle to Sydney.

  • Which is the best airline for flights from Seattle to Sydney, ANA or Air New Zealand?

    The two airlines most popular with KAYAK users for flights from Seattle to Sydney are ANA and Air New Zealand. With an average price for the route of $639 and an overall rating of 8.3, ANA is the most popular choice. Air New Zealand is also a great choice for the route, with an average price of $1,276 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Seattle 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 from Seattle to Sydney.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Seattle 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 Seattle 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 to Seattle with another airline. Booking your flights between Seattle and SYD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle 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 from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Sydney

  • If you are flying out of Seattle/Tacoma International Airport (SEA) and would like to park your car, SEA offers various options at reasonable prices, depending on how long you plan to park. If you are planning for long-term parking, Park n Jet, located 1mile from Seattle/Tacoma International Airport, is the best choice. For short-term parking, you can use Aeroparking, which is located 1.2 miles from the airport. Also, there is an airport shuttle dropping passengers at each terminal.
  • If you are traveling with kids from Seattle/Tacoma International Airport (SEA) to Sydney Kingsford Smith International Airport (SYD), there are multiple play areas and food courts to enjoy before your flight to SYD. The play areas are located across Delta Sky Lounge between Central terminals and Gate A. They are equipped with many toys for kids.
  • If you are looking to spend the night close to the airport for an early flight, look no further than the best hotels in Seattle, which offer several excellent amenities. Most of them are easily accessible from the airport. Some of the hotels include Double Tree by Hilton, which is located 1.2 miles from the airport, Hampton Inn & Suites Seattle, located at 1.3 miles, and Red Lion Hotel Seattle Airport, which is 1 mile from the airport.
  • SYD offers transport services out of the airport for passengers on a tight schedule upon request. To use these services, call your airline to inform them how best they can help ahead of time. You can choose between a shared ride or express reservation, which you can book online in advance.
  • It is recommended that you arrive a few hours before your trip if traveling out of SEA. If you go to the SEA website ahead of time, you can view the security line wait times to plan ahead of time.

Reviews of the top 5 airlines serving from Seattle to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Sydney. 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 Seattle 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.
8.3
ANAOverall score based on 1221 reviews
7.7Food
8.5Boarding
7.9Entertainment
8.2Comfort
8.7Crew
Airline reviews

I thought I bought the ticket directly through Kayak not a 3rd party

2.0 MediocreCristina, Jun 2026
LAX - HND
Read more ANA reviews

I thought I bought the ticket directly through Kayak not a 3rd party

I like that we made it faster than regularly scheduled. Everything else was poor. The boarding was slow and chaotic. One person was screaming instructions to people that didn’t understand and there was only one camera so boarding was slow. The crew was not very friendly and one stewardess was extremely rude to everyone the entire flight. The food was not good and not themed to the country we were going to like every international flight I’ve taken. Lastly the seats were awful. After this flight I would never recommend United and will actively avoid booking another flight through them.

When I checked in, it printed two bag tags. The helper said they would cancel the other. They canceled both and my bag was left behind

The ladies are great seats should be a little bigger!

Couple of hours delayed, we had to re-booked our Shinkansen reservation twice. United Aiines need to improve their time!

The staff is amazing, I cannot stress that enough! The food is really good and snacks at stations to take for yourselves. Economy seating is fine, not the most comfortable, but our friends in Premium Economy said they were very comfortable! Decent entertainment options, but being built in, you have to use their cheap headsets unless you have your own plug in ones. I only have Bluetooth earbuds.

It was good. The crew was efficient, food was good

Seats were extremely cramped even for economy. Food was atrocious. Crew was fine but no follow up, additional drinks offered etc. For a 14 hour flight I expected more.

Boarding was good. Inflight service was good. Alcoholic drinks could have been served free.

Suite lounge in Honolulu is the best lounge in Honolulu. I love the huge bathrooms in ANA first Class on the A380 Honu plane. Japanese meal was outstanding and service was amazing. Everything was just excellent. Can’t wait to fly again

Check in & bag drop was straightforward. Alaskair changed the gate approx 40 min before departure, and I only became aware due to Google wallet update to my boarding pass. Had to move from gate N1 to C9 which required use of the Train, luckily I had time available.

Very short leg - too short for any meals/snacks or entertainment.

Super impressed by staff courtesy, and assistance, Flight was one of the best I've had despite turbulence... Will definitely be flying Alaskan air as my preferred choice

My boarding passes were pulled from my Apple wallet and my 3 family members who were all sitting together in the same row all got put middle seats and were one of the last to board and barely were able to get our bags in the luggage bins.

Was disappointed not to have known Alaska Air offers no music, no flight aware, no films.

I was surprised by everything. The cleanliness, the punctuality, the friendliness of the crew… and the Wi-Fi! Please keep up the good work.

The flight attendant and first class were very friendly, efficient, and wanted to make sure that service was great. Highly recommend this airline.

Thank you to everyone, the crew and pilots.. they were so amazing!!

Crew was so kind, flight was easy, thank you so much for everything

The plane was to narrow. Uncomfortable seats.. Kayak is Awesome!

I never flew with alliance. Kayak is a joke and none of the flights or times were correct. Won’t ever use kayak again

I missed my flight due to unforeseen circumstances It was, however , an excellent price !

We had a medical emergency, needing to get to an emergency room upon landing at LAX. I let the back flight attendants know the situation. One, David, contacted the pilot, who made arrangements for EMT's to be there when we got off the plane. They went above and beyond for us. We didn't have to go through customs, as a customs person came to us and checked us right at the exit of the jet way. Another wonderful woman, a United employee at LAX, perhaps a customer service liaison, took care of our luggage situation, as we weren't going to make our connection to Bozeman. When we came back to LAX to see when we could get a flight to Bozeman, the personnel are very accommodating and booked us on the next flight out, and assigned good seats. It was a horrible flight, physically, from Sydney to LAX, , but the professionalism of all involved was excellent! We are very grateful fir the way they all stepped in and helped during a very unpleasant medical situation. Thank you!!

PREMIUM ECONOMY - excellent !Brilliant new plane. Excellent tv catalogue. Good food. Good communication and service from all friend Australian crew. Good communication from captain. Best travel experience in years.

Very good overall. However, your choices of free movies was limited and there was no music Channel???

I couldn't hear all of the announcements. It was nice when they put them on the screen.

This was the worst flight I’ve been on. Getting on the plane where is was 30 degrees outside was hotter on board cabin must’ve been 33 degrees. This is a health hazard. They cannot be doing this to save on fuel. People could die from this!!. Fans and a/c was, off entertainment was off. Poor excuse given. Crew made the excuse that the system didn’t have enough power. They basically were operating on one engine to save on jet fuel till 3 hours later on cruising altitude and they then started the second engine. And finally the cabin was cooled. On a 7hour red eye flight this made it so uncomfortable and impossible to sleep.

My experience was great overall. Tanya was particularly friendly and helpful the entire trip. I was very pleased with her customer service skills. The plane was an older aircraft but the entire way was comfortable with barely any turbulence at all. Qantas should speed up its fleet renovation. Totally recommend using this airline.

I liked boarding the plane. The staff were rude, the food was appalling and the chairs the most uncomfortable I have ever experienced

an hour late, then had to disembark on back stairs and take 4 flights up to get to main airport. No warning, and difficulty for those with canes and poor knees.

Even through the flight was delayed due to storms near IAH The flight was great! The crew was so hospitable and professional

I flew from Santa Fe to Denver to catch a flight to London and the transfer of my luggage on arrival at Denver to the London flight worked perfectly. The crew on the ground and on board for the London flight were so friendly and efficient.

Boarded early; and arrived home 40 mins early. After a long flight, it’s nice to be back home early. These flights have no amenities; no snacks. So need to bring your own

Boarded early, left early, arrived 40 mins early! A win win for me!

New plane was lovely. Crew customer service is always lax but expected. Kraft on time and arrived safely.

These airplanes should be illegal. The seats are two tight, it is a safety issue. Wheelchair support was ridiculously slow. We almost missed our flight.

It was a short flight so I was expecting too much

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

Flight was delayed but more than 90 minutes. This caused me to miss my available windows for pick-up by a friend. I had to pay $125 for an uber back home from the airport which was an added expense that I had not budgeted for my trip. Staff was friendly.

I felt scammed. The priced advertised was different than what I paid. I paid the whole some online. I then got a call 20 minutes later saying I need to paid 70 more person. She said the price online is not the guaranteed price.

Didn’t make it on the flight. Delayed then had to be rebooked, which in turn had me waiting at the airport for another 8 hours before next flight

No TV on the flight. The charging outlet was not working. No food, even a sandwich. The served orange was poor quality.

Selected seats 5 months prior to date. Had email confirmation and seats were not honoured. Family did not sit together

Loved and was pleasantly surprised by the food!! Request Lufthansa to help transiting passengers at Munich (confusion whether to go thru passport control or not).

The flight was comfortable and the staff were helpful and friendly. However, we did not know we were flying PAL until we arrived in Canada, so it was a bit disconcerting. In addition, which port we were leaving from was confusing.

They did not let us board because one member needed a transit visa, which was not evident at the time of ticket purchase.

I was charge a baggage checking fee $68!! I volunteered to check my duffle bag which usually goes under my seat!

I did not like anything because the flight was cancelled yesterday and I did not get to arrive on time in Toronto as I was rebooked with another airline. This caused me to be really stressed out as I am an individual with back injury and to be forced to stay longer in an airport to accommodate a change of airline and the transfers associated with it Due to this I am probably not going to book through your website to eliminate this potentially chaos in the future

shittiest airline in the hemisphere. To improve - start thinking you're flying people, not cattle

Easy boarding, inflight refreshments came on time and comfortable seat

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

Information on your arrival and departure airports