$679 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 19/11. 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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Cheap Flights from Seattle to Australia

Cheapest return prices found by our users on KAYAK in the last 72 hours
Sydney
Sydney1 stop$1,392
Brisbane
Brisbane1 stop$1,503
Adelaide
Adelaide2 stops$1,821
Perth
Perth1 stop$1,675
Coolangatta
Coolangatta2 stops$1,778
Hobart
Hobart2 stops$1,872
Launceston
Launceston2 stops$1,931
Sydney
Sydney1 stop$1,392
Brisbane
Brisbane1 stop$1,503
Adelaide
Adelaide2 stops$1,821
Perth
Perth1 stop$1,675
Coolangatta
Coolangatta2 stops$1,778
Hobart
Hobart2 stops$1,872
Launceston
Launceston2 stops$1,931

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

Mon, 26 Oct - Mon, 9 Nov
Philippine Airlines Logo
23:55 - 09:45
SEA
-
SYD
39h 50m
1 stop
Philippine Airlines Logo
11:35 - 18:35
SYD
-
SEA
26h 00m
1 stop
$1,392Philippine Airlines
Sun, 15 Nov - Sun, 29 Nov
Philippine Airlines Logo
23:55 - 07:20
SEA
-
MEL
36h 25m
1 stop
Philippine Airlines Logo
09:00 - 19:35
MEL
-
SEA
29h 35m
1 stop
$1,394Philippine Airlines
Tue, 1 Dec - Wed, 9 Dec
Qantas Airways Logo
17:55 - 09:30
SEA
-
MEL
20h 35m
1 stop
Qantas Airways Logo
18:30 - 12:25
MEL
-
SEA
36h 55m
2 stops
$1,395Qantas Airways
Wed, 4 Nov - Mon, 30 Nov
Air Canada Logo
19:05 - 09:35
SEA
-
SYD
19h 30m
1 stop
Air Canada Logo
11:20 - 09:17
SYD
-
SEA
16h 57m
1 stop
$1,460Air Canada
Mon, 27 Jul - Sun, 9 Aug
Air Canada Logo
19:20 - 07:20
SEA
-
SYD
19h 00m
1 stop
Air Canada Logo
09:20 - 14:22
SYD
-
SEA
22h 02m
1 stop
$1,476Air Canada
Wed, 11 Nov - Mon, 30 Nov
Air New Zealand Logo
10:10 - 09:35
SEA
-
SYD
28h 25m
1 stop
Air New Zealand Logo
11:20 - 21:57
SYD
-
SEA
29h 37m
1 stop
$1,500Air New Zealand
Tue, 29 Sep - Tue, 13 Oct
Qantas Airways Logo
16:59 - 05:00
SEA
-
BNE
19h 01m
1 stop
Qantas Airways Logo
20:35 - 22:57
BNE
-
SEA
19h 22m
1 stop
$1,503Qantas Airways
Wed, 1 Jul - Sat, 11 Jul
United Airlines Logo
19:05 - 08:15
SEA
-
MEL
20h 10m
1 stop
United Airlines Logo
10:55 - 12:34
MEL
-
SEA
18h 39m
1 stop
$1,546United Airlines
Mon, 5 Oct - Tue, 13 Oct
United Airlines Logo
10:55 - 09:15
SEA
-
MEL
28h 20m
1 stop
United Airlines Logo
11:55 - 12:23
MEL
-
SEA
18h 28m
1 stop
$1,547United Airlines
Mon, 27 Jul - Mon, 3 Aug
Air New Zealand Logo
06:00 - 20:10
SEA
-
LST
45h 10m
2 stops
Air New Zealand Logo
06:30 - 20:53
LST
-
SEA
31h 23m
3 stops
$2,461Air New Zealand
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 $138 (return) on average. On the other hand, the most expensive months are September and April, when the average cost of return tickets is $1,103 and $1,059 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 7 weeks before departure.

Find deals

Good to know

Low seasonMay
Cheapest flight$679
Best time to beat the crowds (10% less expensive on average)
Most popular time to fly (31% 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 airline 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 9831 reviews
7.7Boarding
7.1Entertainment
8.1Crew
7.3Comfort
6.6Food
Airline reviews

This planes staff was top tier. Everything went great and had a great flight home.

10.0 ExcellentKati, June 2026
DEN - DFW
Read more United Airlines reviews

This planes staff was top tier. Everything went great and had a great flight home.

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

This was an overnight flight, and in the morning they did know coffee service. How you can throw passengers in a San Francisco airport at 5:40 a.m. in the morning and not giving them Coffee is a crime.

I was promised by United Airline (operated by ANA) that I will be seated together with my kids as I am the only adult flying with two minors. We did not get seats together in our 11 hours flight from LA to Tokyo. When asked at the gate, ANA representative said United Airline should have informed them that there is a parent flying with two minors. He said they can’t do anything in the system as the flight is full. He ask me to ask passengers next to me and the kids if they are willing to change seats. This is ridiculous! However, I went in the flight and asked other passages but no one willing to change seats. 11 hours and we were seating separately. I was very disappointed with this. It made things super inconvenient for me.

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

Flight cancelled instead of leaving Friday am now, maybe, leaving Sunday

The pilot had to extend the flight time from san antonio to Houston to burn off fuel. This caused a lot of unnecessary stress since we had a tight connection to Aruba. And with no other flights going to Aruba we were worried about spending a night in Houston. We had to to run to our connection because of the flight crews mistake. Not happy.

Service was professional and quick. Premium economy seat was comfortable given the class

one of the flight attendants on the Dallas to frankfurt leg was somewhat rude..

I'm a United 1K member and have ben for 10 years. The gate agent had no control over the boarding process and had us passengers queued for hours as delays were announced. On the plane, the overhead air nozzle was broken so col over was powering through on me and the passenger next to me. Not a great experience for a million miler on United. Feel free to contact me. Josh Smigel - DM426089

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

Information on your arrival and departure airports

Seattle (SEA)