SEA - SYD

$713 Find Cheap Flights from Seattle to Sydney – 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 Seattle to Sydney departing on 24/8. 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.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return fare
$1,406
Typical prices: $886-$1,622
American Airlines
Mon 3/8Sun 16/8
SEA - SYD • 1 stop
Cheapest one-way flight
$713
Typical prices: $578-$913
ANA
Mon 24/8
SEA - SYD • 2 stops
Top airlines
Cheapest • from $1,406 (return)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Direct flights
Not available
There are currently no direct flights between Seattle and Sydney. You’ll need at least 1 connection.
Insights
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Insights
Top stopover airports
Cheapest • Avg $1,207 (return)
Shortest trip • 18h 53m (one-way)
Insights
Insights
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Insights
When to travel
Cheapest • 35% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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 return 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 return flight deals from Seattle to Sydney

Mon, 3 Aug - Sun, 16 Aug
American Airlines Logo
15:21 - 06:55
SEA
-
SYD
22h 34m
1 stop
American Airlines Logo
17:50 - 23:21
SYD
-
SEA
22h 31m
1 stop
$1,406American Airlines
Mon, 27 Jul - Tue, 11 Aug
American Airlines Logo
15:21 - 06:55
SEA
-
SYD
22h 34m
1 stop
American Airlines Logo
09:10 - 16:32
SYD
-
SEA
24h 22m
1 stop
$1,409American Airlines
Mon, 27 Jul - Mon, 3 Aug
American Airlines Logo
15:21 - 06:55
SEA
-
SYD
22h 34m
1 stop
American Airlines Logo
17:50 - 21:45
SYD
-
SEA
20h 55m
1 stop
$1,410American Airlines
Mon, 3 Aug - Sun, 16 Aug
United Airlines Logo
08:45 - 06:55
SEA
-
SYD
29h 10m
1 stop
United Airlines Logo
09:30 - 21:15
SYD
-
SEA
28h 45m
2 stops
$1,412United Airlines
Mon, 17 Aug - Mon, 24 Aug
American Airlines Logo
11:40 - 07:05
SEA
-
SYD
26h 25m
1 stop
American Airlines Logo
09:10 - 16:41
SYD
-
SEA
24h 31m
2 stops
$1,413American Airlines
Mon, 27 Jul - Mon, 3 Aug
United Airlines Logo
17:04 - 07:00
SEA
-
SYD
20h 56m
1 stop
United Airlines Logo
09:30 - 21:10
SYD
-
SEA
28h 40m
2 stops
$1,415United Airlines
Mon, 27 Jul - Tue, 11 Aug
United Airlines Logo
17:20 - 06:55
SEA
-
SYD
20h 35m
1 stop
United Airlines Logo
10:20 - 18:29
SYD
-
SEA
25h 09m
1 stop
$1,416United Airlines
Mon, 27 Jul - Tue, 11 Aug
American Airlines Logo
15:21 - 06:55
SEA
-
SYD
22h 34m
1 stop
American Airlines Logo
09:10 - 16:32
SYD
-
SEA
24h 22m
1 stop
$1,418American Airlines
Mon, 3 Aug - Mon, 17 Aug
American Airlines Logo
14:20 - 07:30
SEA
-
SYD
24h 10m
1 stop
American Airlines Logo
09:10 - 16:32
SYD
-
SEA
24h 22m
1 stop
$1,419American Airlines
Mon, 27 Jul - Tue, 15 Sep
United Airlines Logo
19:05 - 06:55
SEA
-
SYD
18h 50m
1 stop
United Airlines Logo
09:30 - 15:39
SYD
-
SEA
23h 09m
1 stop
$1,423United Airlines
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 return flight from Seattle to Sydney?

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

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 $1,000 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $2,413 and $1,838 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 7 weeks before departure.

Good to know

Low seasonMarch
Cheapest flight$713
Best time to beat the crowds (2% less expensive on average)
Most popular time to fly (55% more expensive on average)
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 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 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 $713 for a one-way ticket and $1,406 for a return.

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

    Seattle and Sydney are both served by 1 main airport. You will leave Seattle from Seattle/Tacoma Intl and will be arriving 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?

    Star Alliance is the only airline alliance operating flights between Seattle and Sydney.

  • 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 return ticket. You could then fly to Sydney with an airline and back to Seattle with another airline.

  • 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 airline flying 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.
7.4
United AirlinesOverall score based on 9948 reviews
7.3Comfort
8.1Crew
6.7Food
7.1Entertainment
7.7Boarding
Airline reviews

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

10.0 ExcellentSteve, May 2026
SFO - SYD
Read more United Airlines reviews

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

My flight time was changed without any notification to me which ruined my time sensitive plans so I ended up completely changing my travel plans and no reimbursement.

Terrible. Our first time back on United for 10 years, the seats in Polaris class are small and uncomfortable. They have squished too many people in to get more $$$. The staff are not friendly and not wanting to accommodate. I asked for two salads rather than a main meal and was advised no we wont do that. Then asked what I would like for breakfast and given something else anyway. I will not be flying United International anytime soon.

Food should be changed in menu Many muslims travels in this airlime they need to add one Halal meal

Smooth flight. As always dinner could have been more generous. Breakfast was great.

Moody attendants that can barely look up at the passengers. I’m all for people having an off day, but you can tell some Untied Airlines Employees have lost their zeal for their jobs

Great checkin experience and flight crew were very friendly and helpful

Staff did not care, and very clearly did not want to be serving passengers. Requests were ignored repeatedly. Toilets filthy. Bins were just trash bags hung around the place that were never emptied. It was a challenge to even get a glass of water on a 14 hour flight.

Got automatically assigned a middle seat, unless I fork out extra money for seat assigment.

Flight was diverted to Canberra because Not enough fuel to circle on Sydney’s skies waiting for showers to pass. After that everything went wrong. It took forever to put fuel. Once back rolling, we stopped short of takeoff because crew had reached maximum work hours per shift. Back to gate we waited and waited in the plane with no water and no food - a total of 4 hours. Received contrasting news about the follow up of our trip. Finally we disembarked but our luggage could not be processed there as not enough custom agents. We ended up on buses and arrived at Sydney airports after a 3 hours trip. There we had to queue in line with 240 more passengers to file a lost luggage claim. We received the luggage after 48 hours, many of which spent holding with non-existent United customer service. Never able to speak to an actual person during those long phone calls. Finally on a chatline I could talk to a baggage agent, who filed another report as our luggage did not appear anywhere in their system. Thus it was surprising to get it back.

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

Information on your arrival and departure airports