$595 Find Cheap Flights from Seattle to Australia

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 Australia departing on 24/5. 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 Australia

Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 18% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Australia

Cheapest return prices found by our users on KAYAK in the last 72 hours
Sydney
Sydney1 stop$1,476
Brisbane
Brisbane2 stops$1,551
Perth
Perth1 stop$1,788
Adelaide
Adelaide2 stops$1,781
Coolangatta
Coolangatta2 stops$1,722
Hobart
Hobart2 stops$2,387
Launceston
Launceston2 stops$1,849
Sydney
Sydney1 stop$1,476
Brisbane
Brisbane2 stops$1,551
Perth
Perth1 stop$1,788
Adelaide
Adelaide2 stops$1,781
Coolangatta
Coolangatta2 stops$1,722
Hobart
Hobart2 stops$2,387
Launceston
Launceston2 stops$1,849

Book Cheap Seattle to Australia Plane Tickets

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

Mo, 18 Mai - Mi, 3 Jun
Multiple Airlines Logo
18:40 - 07:30
SEA
-
SYD
19h 50m
1 stop
Multiple Airlines Logo
09:10 - 11:01
SYD
-
SEA
18h 51m
1 stop
$1,476Multiple Airlines
Sa, 1 Aug - Fr, 14 Aug
Qantas Airways Logo
14:20 - 07:05
SEA
-
SYD
23h 45m
1 stop
Qantas Airways Logo
17:50 - 20:56
SYD
-
SEA
20h 06m
1 stop
$1,489Qantas Airways
Fr, 25 Sep - Fr, 23 Okt
American Airlines Logo
17:05 - 06:45
SEA
-
MEL
20h 40m
1 stop
American Airlines Logo
09:45 - 16:36
MEL
-
SEA
24h 51m
1 stop
$1,505American Airlines
Mo, 18 Mai - Mi, 3 Jun
Air Canada Logo
05:50 - 07:20
SEA
-
SYD
32h 30m
1 stop
Air Canada Logo
09:20 - 22:40
SYD
-
SEA
30h 20m
1 stop
$1,508Air Canada
Mo, 18 Mai - Mi, 3 Jun
Air Canada Logo
10:45 - 07:20
SEA
-
SYD
27h 35m
1 stop
Air Canada Logo
09:20 - 18:30
SYD
-
SEA
26h 10m
1 stop
$1,509Air Canada
Mi, 27 Mai - Mi, 3 Jun
American Airlines Logo
06:50 - 06:45
SEA
-
MEL
30h 55m
1 stop
American Airlines Logo
09:45 - 17:44
MEL
-
SEA
24h 59m
2 stops
$1,512American Airlines
Mo, 8 Jun - Mo, 15 Jun
United Airlines Logo
17:20 - 06:55
SEA
-
SYD
20h 35m
1 stop
United Airlines Logo
10:20 - 16:20
SYD
-
SEA
23h 00m
1 stop
$1,516United Airlines
Fr, 14 Aug - Sa, 29 Aug
United Airlines Logo
19:35 - 08:15
SEA
-
MEL
19h 40m
1 stop
United Airlines Logo
10:55 - 16:15
MEL
-
SEA
22h 20m
1 stop
$1,521United Airlines
So, 2 Aug - Mi, 19 Aug
ANA Logo
16:30 - 19:10
SEA
-
SYD
33h 40m
1 stop
ANA Logo
11:45 - 23:24
SYD
-
SEA
28h 39m
2 stops
$1,529ANA
Do, 4 Jun - Mo, 15 Jun
ANA Logo
16:30 - 14:40
SEA
-
OOL
53h 10m
2 stops
ANA Logo
07:05 - 14:25
OOL
-
SEA
48h 20m
2 stops
$1,832ANA
Booking Insights

KAYAK's insights & trends for Seattle to Australia flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Australia, 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 Australia is January, when tickets cost $135 (return) on average. On the other hand, the most expensive months are March and September, when the average cost of return tickets is $1,083 and $1,083 respectively.

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

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 Australia, 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 Australia, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonMarch
Cheapest flight$595
Best time to beat the crowds (13% less expensive on average)
Most popular time to fly (27% more expensive on average)
Flight from Seattle to Sydney

FAQs - booking Australia flights

  • How much luggage can I take if I buy an economy ticket from Seattle to Perth?

    When you fly from Seattle-Tacoma International Airport to Perth in Western Australia, you'll be landing at Perth Airport (PER). You can find a flight aboard Qatar with one stop in Hamad International Airport (DOH) that allows economy classic passengers one carry-on and two checked bags. Most other cheaper flights allow one carry-on.

  • Can I rent a car when my Seattle flight lands in Sydney?

    Sydney Kingsford Smith International Airport has rental car counters located in the arrivals area of Terminal 1 International and Terminals 2/3 Domestic. Some companies represented at include Avis, Europcar, Enterprise, and others.

  • What are some common layover cities on flights from Seattle to Brisbane, Australia?

    When you fly from Seattle-Tacoma International Airport to Brisbane Airport (BNE), you will have at least one stop. Flights on Qantas, Alaska, or United tend to stop in Los Angeles International Airport (LAX). Air Canada tends to stop in Vancouver International Airport (YVR), EVA Air in Taiwan Taoyuan International Airport (TPE), and Singapore Airlines in Singapore Changi International Airport.

  • Which airline flies a sustainable flight from the Seattle Tacoma International Airport SEA to Adelaide Airport (ADL) in South Australia?

    One of the most sustainable airlines that operates flights from Seattle to Adelaide Airport is Alaska airlines. Alaska is making successful strides to achieve net zero carbon emissions by the year 2040 by increasing operational efficiency, investing in fleet modernization, new technology, sustainable aviation fuels, and high quality carbon removal techniques.

  • How does KAYAK find such low prices on flights from Seattle to Australia?

    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 Australia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Seattle to Australia is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Australia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Seattle to Australia 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 from Seattle to Australia?

    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 from Seattle to Australia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Australia

  • Travelers who wish to fly from Seattle to Australia will be departing from the Seattle-Tacoma International Airport (SEA). Situated about 13 miles south of the heart of Seattle, this airport is a hub for several airlines, including Alaska, Delta Air Lines, and Horizon Air.
  • Flights from Seattle to Sydney, Australia will land at Sydney Kingsford Smith International Airport (SYD). While it is unlikely that you will find a non-stop flight from Seattle to Sydney, several airlines operate flights with one connection. Air Canada stops in Vancouver, Qantas and Delta in Los Angeles, and ANA in Tokyo.
  • When you fly from Seattle to Melbourne in Victoria, Australia, you will land at Melbourne Airport (MEL). The cheapest flights available tend to involve multiple airlines and connection cities with self-transfers. However, Singapore Airlines offers flights paired with both Scoot and Jetstar that are affordable and have only one stop in Singapore Changi International Airport (SIN).
  • If you want to visit the north of Queensland, the coastal city of Cairns makes an ideal destination. You'll be landing at Cairns Airport (CNS), a hub for Jetstar, Qantas, Australian Airlines, and others. One of the most affordable flights available is aboard Japan Airlines paired with Jetstar with one stop in Narita International Airport (NRT).
  • Economy-ticketed passengers at Seattle-Tacoma International Airport can relax in refined comfort and style while waiting for a flight to Australia. You can show a prepaid lounge pass or pay an entrance fee in order to access the exclusive lounge The Club at SEA. There is one location in the Central Terminal and one in the South Satellite.

Reviews of the top airlines flying from Seattle to Australia

 
Need help choosing which airline to fly with from Seattle to Australia? 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 9672 reviews
7.7Boarding
8.1Crew
6.6Food
7.1Entertainment
7.3Comfort
Airline reviews

Some crew were unfriendly or in some cases just straight up rude.

6.0 GoodAnonymous, Apr 2026
SFO - YVR
Read more United Airlines reviews

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

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

It was good that our flight left early. It was a nice smooth flight and landing.

All good……but luggage didn’t make it on the airplane. Had to wait 3 days. Was a bummer.

Small suitcase used for carryon the last time was refused by boarding crew this time. Appears to be at the discretion and mood of the person on the day. Flight was only half booked, there would have been no problem with space.

It was a problem because there was a delay where we sat before taking off from newark,then when landed in Toronto we sat on tarmac and they wouldn't let us out for a long period of time. When we finally were released to the airport in Toronto the attendant scanned our boarding pass that we were here for our connection to Brazil. We ran all the way to the gate and they said at the gate the door is shut so we can not let you on the plane. We explained that we were checked in by the attendant when we arrived at Toronto airport to go to Brazil and they should not have shut the door. We were ignored at the gate

Flight home was delayed multiple times, did not get home until 2am

the check-in lady at ORD was extremely rude and unprofessional. very disappointed as it was supposed to be a celebration for my wife's birthday and it really put a damper on things. if i wanted to be treated like trash, i would have flown Economy! (as opposed to business class)

My original flight was cancelled and then rebooked four hours later on a recovery flight, but I was checked in as stanby and had no seats so as a family of four we were concerned about not being seated altogether. Our flight then got delayed by another 1.5 hours and when seats were assigned at the gate, three of the four of us were together and we could get my wife closer, they offered no assistance.

My original booking was through AirCanada and unbeknownst to me they altered flights and providers which caused a complete disaster for checking in for my flights and seat assignments. The original gate agent in Auckland had me basically doing gymnastics to get onto the future flights and have my luggage follow me.

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

Information on your arrival and departure airports