$732 Find Cheap Flights from Seattle to Australia – 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 Australia departing on 12/9. 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.
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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$1,377
Brisbane
Brisbane1 stop$1,472
Adelaide
Adelaide2 stops$1,666
Perth
Perth2 stops$1,787
Coolangatta
Coolangatta2 stops$1,773
Hobart
Hobart2 stops$1,768
Launceston
Launceston2 stops$1,986
Sydney
Sydney1 stop$1,377
Brisbane
Brisbane1 stop$1,472
Adelaide
Adelaide2 stops$1,666
Perth
Perth2 stops$1,787
Coolangatta
Coolangatta2 stops$1,773
Hobart
Hobart2 stops$1,768
Launceston
Launceston2 stops$1,986

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

Thu, 5 Nov - Wed, 18 Nov
Multiple Airlines Logo
11:06 - 06:25
SEA
-
SYD
24h 19m
1 stop
Multiple Airlines Logo
14:00 - 18:26
SYD
-
SEA
23h 26m
2 stops
$1,377Multiple Airlines
Wed, 28 Oct - Tue, 17 Nov
Multiple Airlines Logo
11:06 - 06:25
SEA
-
SYD
25h 19m
1 stop
Multiple Airlines Logo
14:00 - 18:26
SYD
-
SEA
23h 26m
2 stops
$1,383Multiple Airlines
Thu, 5 Nov - Mon, 16 Nov
Multiple Airlines Logo
11:06 - 06:25
SEA
-
SYD
24h 19m
1 stop
Multiple Airlines Logo
14:00 - 18:26
SYD
-
SEA
23h 26m
2 stops
$1,384Multiple Airlines
Wed, 2 Sep - Tue, 27 Oct
Multiple Airlines Logo
10:34 - 07:30
SEA
-
SYD
27h 56m
1 stop
Multiple Airlines Logo
14:00 - 18:26
SYD
-
SEA
22h 26m
2 stops
$1,389Multiple Airlines
Sun, 9 Aug - Wed, 12 Aug
Air Canada Logo
19:20 - 07:05
SEA
-
BNE
18h 45m
1 stop
Air Canada Logo
10:00 - 14:22
BNE
-
SEA
21h 22m
1 stop
$1,475Air Canada
Mon, 31 Aug - Sat, 26 Sep
United Airlines Logo
18:30 - 07:30
SEA
-
MEL
20h 00m
1 stop
United Airlines Logo
10:55 - 18:44
MEL
-
SEA
24h 49m
1 stop
$1,502United Airlines
Tue, 18 Aug - Fri, 28 Aug
United Airlines Logo
13:16 - 08:15
SEA
-
MEL
25h 59m
1 stop
United Airlines Logo
09:30 - 19:14
MEL
-
SEA
26h 44m
1 stop
$1,502United Airlines
Tue, 18 Aug - Fri, 28 Aug
United Airlines Logo
15:30 - 08:15
SEA
-
MEL
23h 45m
1 stop
United Airlines Logo
09:30 - 21:15
MEL
-
SEA
28h 45m
2 stops
$1,502United Airlines
Sat, 12 Sep - Mon, 28 Sep
Air Canada Logo
10:50 - 07:05
SEA
-
BNE
27h 15m
1 stop
Air Canada Logo
10:00 - 18:32
BNE
-
SEA
25h 32m
1 stop
$1,530Air Canada
Wed, 18 Nov - Sun, 29 Nov
Air Canada Logo
15:15 - 08:45
SEA
-
BNE
23h 30m
1 stop
Air Canada Logo
10:45 - 21:57
BNE
-
SEA
29h 12m
1 stop
$1,530Air Canada
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 February, when tickets cost $1,376 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of return tickets is $2,400 and $1,868 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 23 weeks before departure.

Good to know

Low season

July

Cheapest flight

$732
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly (34% more expensive on average)
Flight from Seattle to Coolangatta

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 10046 reviews
7.3Comfort
7.7Boarding
8.1Crew
6.6Food
7.1Entertainment
Airline reviews

Flight be on time would be a good start. Then train your flight attendants to be attentive and friendly. This time they completely forgot my row for the measly snack! United, do better!

4.0 OkayAnonymous, July 2026
SEA - SFO
Read more United Airlines reviews

Flight be on time would be a good start. Then train your flight attendants to be attentive and friendly. This time they completely forgot my row for the measly snack! United, do better!

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.

Very comfortable seating and the Flight staff were very attentive. The premium economy section that I was seated in was very clean, updated, and well appointed. I would highly recommend flying United Airlines as this experience was better than the Japan Airlines business class that I flew several months ago.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Delayed by 2.5hrs any longer and they would’ve had to honour their own policy for breaking their own rules and regs. Not cool, especially when I have an infant child that needs to stay on a routine and they get schedules.

They had three choices for snacks - but you could only have one - and they ran out of the dark chocolate before they made it all the way down the aisle... Packed flight - limited service.

They opened my checked bag and even though my lock was tsa approved, they loose my lock and left my bag just like that. Incompetent people, very upset about it. I’ll try to avoid traveling with united

We fly to Ecuador frequently. Checking in is usually a hassle because most United agents take some time before they can verify that my passport doesn't require a visa to Ecuador. This time the process was even longer due to the cyber attack. But she was really nice to us. So glad we brought plenty of snacks to supplement the 3 flights from SEA to GYE.

We had selected seats in the app that were a 2x2 format in the middle of the plane. Our seats when we got on the plane had been moved to the back rows in a 3x1 format. What’s the point of paying up for tickets that allow seat selection if the airline will just change them?

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.

They could care less about you. Just under a 4 hour delay in Seattle, leading into a missed connection in Vancouver, which led to 2 more delays that added up to 3 more hours leaving us to have to sleep on the floor of the Toronto airport cause they don't help you find accomodations and they just book you on the next flight out. Took an additional 14 hours to get home. Always given the brush off to get rid of us. Worst airline ever

All was good with comfort and ease of boarding. There was confusion from what gate to board at. Meant moving a long distance but I allowed plenty of time for this.

Good airport. Good entertainment on the big flight. Did not have a good way to prop up or mount my phone/ipad

Air Canada at SeaTac was the best. Polite, helpful, all good!

The problem in part was with the airports, not really the fault of Air Canada. Confusing directions regarding the gate, in Seattle the recommended shuttle train entrance was not working. Simular problems in Toronto. Baggage arrived in good time. Marx Bros movie on entertainment from Seattle. I was told I was laughing too loudly, by the flight attendant. No lounge in Seattle. Lounge in Toronto excellent.

Both fights were delayed. Food could be better comparing to other international flights

I found the personal kind and caring. The Problem was not enough people to serve the the customers. The flow was restricted the crowd frustrated by the wait times. Air Canada seems to hire good people but they need backup in order to provide the service we pay for.

The Montreal to Barcelona flight was cancelled half hour before boarding. We had to struggle for hours to find an alternative route through a very long route with 6 hours of transit time in Munich. It wasted almost one full day of our long awaited vacation. We are extremely disappointed.

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

Information on your arrival and departure airports