$367 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 12/11. 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.
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1 adult, Economy

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Cheap Flights from Seattle to Australia

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Sydney
Sydney1 stop$819
Melbourne
Melbourne2 stops$823
Brisbane
Brisbane1 stop$911
Perth
Perth1 stop$1,165
Cairns
Cairns2 stops$967
Adelaide
Adelaide2 stops$996
Hobart
Hobart2 stops$1,011
Coolangatta
Coolangatta2 stops$1,011
Canberra
Canberra2 stops$844
Darwin
Darwin2 stops$1,058
Maroochydore
Maroochydore2 stops$1,087
Sydney
Sydney1 stop$819
Melbourne
Melbourne2 stops$823
Brisbane
Brisbane1 stop$911
Perth
Perth1 stop$1,165
Cairns
Cairns2 stops$967
Adelaide
Adelaide2 stops$996
Hobart
Hobart2 stops$1,011
Coolangatta
Coolangatta2 stops$1,011
Canberra
Canberra2 stops$844
Darwin
Darwin2 stops$1,058
Maroochydore
Maroochydore2 stops$1,087

Book Cheap Seattle to Australia Plane Tickets

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

Sun, Nov 2 - Wed, Nov 12
Philippine Airlines Logo
9:30 pm - 9:50 amSEA-SYD
41h 20m1 stop
Philippine Airlines Logo
11:35 am - 6:40 pmSYD-SEA
26h 05m1 stop
$819Philippine Airlines
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Fri, Nov 7 - Fri, Nov 14
American Airlines Logo
11:25 am - 9:00 amSEA-SYD
26h 35m2 stops
American Airlines Logo
5:45 pm - 6:11 pmSYD-SEA
19h 26m1 stop
$820American Airlines
Find Deal
Wed, Feb 11 - Sun, Feb 22
Air Canada Logo
3:40 pm - 3:35 pmSEA-MEL
28h 55m2 stops
Air Canada Logo
7:10 am - 9:31 amMEL-SEA
21h 21m2 stops
$823Air Canada
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Tue, Nov 11 - Wed, Jan 14
United Airlines Logo
5:20 pm - 9:15 amSEA-SYD
20h 55m1 stop
United Airlines Logo
12:10 pm - 11:30 amSYD-SEA
18h 20m1 stop
$832United Airlines
Find Deal
Mon, Dec 8 - Sun, Dec 21
Qantas Airways Logo
2:59 pm - 7:25 amSEA-SYD
21h 26m1 stop
Qantas Airways Logo
11:20 am - 6:43 pmSYD-SEA
26h 23m1 stop
$835Qantas Airways
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Sun, Oct 19 - Sun, Nov 2
United Airlines Logo
5:26 pm - 8:00 amSEA-SYD
20h 34m1 stop
United Airlines Logo
11:50 am - 7:10 pmSYD-SEA
25h 20m2 stops
$838United Airlines
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Sun, Nov 30 - Thu, Dec 11
Air Canada Logo
8:00 pm - 2:40 pmSEA-SYD
23h 40m2 stops
Air Canada Logo
4:00 pm - 10:06 pmSYD-SEA
25h 06m1 stop
$839Air Canada
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Fri, Nov 14 - Mon, Nov 24
Qantas Airways Logo
6:20 am - 7:25 amSEA-SYD
30h 05m1 stop
Qantas Airways Logo
11:20 am - 8:23 pmSYD-SEA
28h 03m1 stop
$843Qantas Airways
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Thu, Oct 30 - Mon, Nov 17
Delta Logo
5:55 pm - 7:10 amSEA-SYD
19h 15m1 stop
Delta Logo
10:40 am - 12:56 pmSYD-SEA
21h 16m2 stops
$849Delta
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Tue, Oct 28 - Wed, Nov 19
Delta Logo
7:40 pm - 7:10 amSEA-SYD
41h 30m1 stop
Delta Logo
10:40 am - 4:55 pmSYD-SEA
25h 15m2 stops
$856Delta
Find Deal
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 September, when tickets cost $941 (return) on average. On the other hand, the most expensive months are December and January, when the average cost of round-trip tickets is $1,331 and $1,325 respectively.

What’s the cheapest day of the week to fly from Seattle to Australia?

The average price of all round-trip flights from Seattle to Australia clicked on KAYAK for each day over the last 12 months.

For Seattle to Australia, Tuesday is the cheapest day to fly on average and Thursday is the most expensive. Flying from Australia back to Seattle, the best deals are generally found on Saturday, with Monday being the most expensive.

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 seasonMay
Cheapest flight$367
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly with an average 22% increase in price.
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 travelers 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 round-trip 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.

  • What is the cheapest time of day to fly to Australia?

    The cheapest time of day to fly to Australia is generally at night, when round-trip flights cost $1,078 on average. Morning departures are around 1% more expensive than evening flights, on average. The most expensive time of day to fly to Australia is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,152.

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 5 airlines serving 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.
8.0
Alaska AirlinesOverall score based on 10000 reviews
8.1Boarding
7.0Entertainment
8.5Crew
7.1Food
7.8Comfort
Airline reviews

Plane seats are comfortable and seemed more roomy than others I have been on. Playing was clean and flight crew friendly. Passengers who have a connecting flight should however be allowed off the plane first

10.0 ExcellentJILL, Sep 2025SEA - SBP
Read more Alaska Airlines reviews

Plane seats are comfortable and seemed more roomy than others I have been on. Playing was clean and flight crew friendly. Passengers who have a connecting flight should however be allowed off the plane first

flights on time, flights that were leaving when scheduled..having the alaska people on the phone and most of all getting rid of the new atmos website it is terrible!!!!!!!!

6 hour flight, just crackers and drinks. No WiFi, no tv, and tight seats. Just like every other airline.

Seattle airport terminal was a nightmare to navigate. Coming g off a cruise boat etc. Lack of convient Restrooms a major issue. Once able to get to boarding Alaska Air it was good experience.

I don’t want to pay extra to choose my seat

SeaTac airport hottible No signage to tell you where to go Took one and half hour to make to gate after being dropped at airport HORRIBLE LOTS OF yelling at patrons EXTREMELY HORRIBLE AND SCARY!

Appreciated the upgrade on the saver ticket. Made the 5 hour flight bearable.

Only issue was at the gate the clerk tried to get us to check our carry on bags. When I questioned the other clerk said, the flight isn't full, they are fine to carry on

The best thing were the seats It was too cold most of the time. The food was poor… The eggs were runny and potatoes were cold. The last time I flew first class we had a TV screen to watch movies but not this time The last time we had free alcohol, but not this time

All flights were on time. No crowded and had empty seats. All flight attendents were great.

Cramped seating for me. Luckily it wasn’t a long flight

Lounge in Lagos is terrible, food on board from Lagos to Atlanta was horrible. Only bright spot the cabin crew were awesome.

The airport was reasonably clean. The boarding process reasonably efficient. The cabin crew was efficient, polite but not that friendly. The food quality was unremarkable and the choices were awful . There was either a so so chicken dish or a “ vegetarian “ option which was really cheap carbohydrates drowned in cheese. Signing onto i flight wifi was not straightforward. Overall it was a very average experience

The staff and the boarding procedure were all amazing . The one flight was not equipped with WIFI which now adays seems odd. All in all the experience was good

Passengers need to check in big baggage instead of bringing on the plane. That cause inconvenience for everyone. Otherwise flight was good.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

A few more inches of legroom is all i ask

One of the best Qantas business flights I've had. Quality product

Business class points redemption - good value for points paid, dubious value if out of your own pocket, domestic class business product okay for this length of flight. The flight left and arrived on time, crew were good, aircraft was a bit old and tired, but still miles ahead of their competitors in Virgin and Jetstar.

Airline running better than post Covid, proper boarding process now implemented, some aircraft feeling a bit old and tired, crew fine, online experience better.

Five hour flight instead of four hours due to westerly headwinds which wasn’t the fault of Qantas !

The wifi was out. Otherwise it was great flight. Richard, as CSM, was excellent.

Was bumped to a later flight because of inefficiency on part of the airline.

The Emerits/Qantas flight was cancelled to Wellington. We need a refund. Had to buy another airline ticket. How do we get the refund. Still not in Wellington.

Delayed QF59 flight once again, Qantas doesn't fail in maintaining there delayed departures and arrivals. USB points do not work nor do the power point sockets on the plane, Qantas staff admitted that on the flight. Don't expect to your charge devices. Saving grace, was the ice cream. Bottom line, if you expect to fly to HND and make it on time avoid Qantas and if you're interested in ice cream - visit 7/11.

Pretty excellent. I don’t know what the pilot could have done better with the bumping ( there was a storm) nor what happened to my ears coming down into bendigo. It doesn’t happen coming down into Sydney just the return flight. I wonder why?

Check in was quick and easy during early hours. Flight was on time, and customer services was a plus.

Terrible. They wouldn't allow me on my flight on the 14th..

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Tastless food and too obvious lack of enthusiasm for service in the economy vesus business class

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

Didn’t realize I purchased a basic fare with no carry ons allowed. Not very well communicated. Also had seats switched without knowledge and had to pay for different ones.

We loved our Air Canada experience and will definitely fly them again. It just so happened than in the first leg of our trip their entertainment system was not working, and neither was their oven so cold meal & snacks only.

For the price, it was a really good experience. There was no entertainment on board, so I couldn't really rate this, and I didn't order a meal. I appreciated that there was a free glass of wine.

Short flight. Everything was fine except the flight was delayed twice for a total of an hour.

My flight from New York to Canada and Canada to Brisbane was canceled, so I had to take united airlines instead flight from New York to Dubai then layover in Dubai 8 hours then from Dubai to Brisbane it was extremely difficult for me , it was a nightmare flying with Canadian airlines unfortunately.

I found the boarding easy and my seat was very comfortable as I had a lot of leg room. I am not too happy that I no longer have lounge access even though I used to get it with my TD credit card.

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

Real smooth and easy, Real good leg room in coach!

There labor disputes cancelled my flight less than 24 hours before my boarding time but there customer service/website was easy enough to navigate and they rebooked me for no upcharge.

Re luggage I carried a backpack only. I did not check any bags in. However there were other passengers with carry on luggage going in the plane. My question is why are others allowed to have a carry on luggage inside the plane? Shouldn’t they have dropped it off at the gate? I’m asking because I could have brought the same thing instead of a backpack only. Please clarify for future reference. Thank you.

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