$382 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 3/25. 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 round-trip prices found by our users on KAYAK in the last 72 hours
Sydney
Sydney1 stop$983
Melbourne
Melbourne2 stops$1,042
Brisbane
Brisbane1 stop$837
Perth
Perth1 stop$1,175
Cairns
Cairns2 stops$1,689
Adelaide
Adelaide2 stops$1,182
Hobart
Hobart2 stops$1,339
Coolangatta
Coolangatta2 stops$1,351
Canberra
Canberra2 stops$1,125
Darwin
Darwin2 stops$1,649
Maroochydore
Maroochydore2 stops$2,029
Sydney
Sydney1 stop$983
Melbourne
Melbourne2 stops$1,042
Brisbane
Brisbane1 stop$837
Perth
Perth1 stop$1,175
Cairns
Cairns2 stops$1,689
Adelaide
Adelaide2 stops$1,182
Hobart
Hobart2 stops$1,339
Coolangatta
Coolangatta2 stops$1,351
Canberra
Canberra2 stops$1,125
Darwin
Darwin2 stops$1,649
Maroochydore
Maroochydore2 stops$2,029

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

Fri, Nov 28 - Wed, Dec 3
Air Canada Logo
8:00 pm - 8:45 amSEA-BNE
18h 45m1 stop
Air Canada Logo
10:45 am - 9:31 amBNE-SEA
16h 46m1 stop
$837Air Canada
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Wed, Mar 4 - Wed, Mar 18
Air Canada Logo
10:05 am - 8:45 amSEA-BNE
28h 40m1 stop
Air Canada Logo
9:45 am - 3:01 pmBNE-SEA
22h 16m1 stop
$850Air Canada
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Fri, Feb 20 - Sun, Mar 1
Delta Logo
2:04 pm - 8:20 amSEA-BNE
24h 16m1 stop
Delta Logo
10:40 am - 8:37 pmBNE-SEA
27h 57m1 stop
$867Delta
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Wed, Mar 4 - Wed, Mar 18
Delta Logo
11:15 am - 8:20 amSEA-BNE
27h 05m2 stops
Delta Logo
10:05 am - 6:32 pmBNE-SEA
25h 27m2 stops
$871Delta
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Wed, Nov 26 - Wed, Dec 10
United Airlines Logo
1:20 pm - 7:30 amSEA-BNE
24h 10m1 stop
United Airlines Logo
11:40 am - 9:00 pmBNE-SEA
27h 20m1 stop
$962United Airlines
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Wed, Nov 26 - Wed, Dec 10
United Airlines Logo
7:10 am - 7:30 amSEA-BNE
30h 20m2 stops
United Airlines Logo
11:40 am - 9:46 pmBNE-SEA
28h 06m2 stops
$967United Airlines
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Thu, Jan 29 - Tue, Mar 24
Qantas Airways Logo
5:53 pm - 9:30 amSEA-MEL
20h 37m1 stop
Qantas Airways Logo
12:00 pm - 2:16 pmMEL-SEA
20h 16m1 stop
$1,044Qantas Airways
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Tue, Feb 10 - Mon, Apr 20
Qantas Airways Logo
5:53 pm - 9:30 amSEA-MEL
20h 37m1 stop
Qantas Airways Logo
9:45 am - 10:49 pmMEL-SEA
30h 04m1 stop
$1,052Qantas Airways
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Sat, Mar 14 - Fri, Mar 20
Singapore Airlines Logo
9:45 am - 11:55 pmSEA-PER
23h 10m1 stop
Singapore Airlines Logo
5:05 pm - 8:10 amPER-SEA
30h 05m1 stop
$1,175Singapore Airlines
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Sat, Mar 14 - Thu, Mar 19
Singapore Airlines Logo
9:45 am - 11:55 pmSEA-PER
23h 10m1 stop
Singapore Airlines Logo
1:15 am - 8:10 amPER-SEA
21h 55m1 stop
$1,186Singapore Airlines
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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 August, when tickets cost $863 (return) on average. On the other hand, the most expensive months are December and January, when the average cost of round-trip tickets is $1,335 and $1,323 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$445
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly with an average 19% increase in price.
Flight from Seattle to Brisbane

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 11243 reviews
7.1Food
7.8Comfort
7.0Entertainment
8.1Boarding
8.5Crew
Airline reviews

Pretzels are always a disappointment. Cheezits, Sun Chips, trail mix, anything else would be nice.

8.0 ExcellentLyle, Nov 2025SEA - BOI
Read more Alaska Airlines reviews

Pretzels are always a disappointment. Cheezits, Sun Chips, trail mix, anything else would be nice.

Its bumpy but I can say its safe flight ,Thanks Alaska airline for bringing me in my destination😊.

Almost 3 hr delay in Settle with very little information available to passengers. They boarded the plane and we waited for a long time inside the plane as well.

This was our first time flying with Alaska. It was a seamless experience, with comfortable seats and leg room. Staff were friendly and helpful.

Flight on time. Crew good. Seating Bad. Have to pay extra on a not cheap flight to avoid being next to toilet.

The crew was great! Passengers were nice. Just an fyi that I heard several of them complain that the snack was not gluten free. Many people got handed the snack and then promptly gave it back to the flight attendant. Might be good to look into another option as such a high percentage of people in CO and WA are gf. Cheers!

Food and entertainment not applicable - standard drinks and cinnamon cookies; crew did not do a song and dance for us so no entertainment. I like the slightly better leg room than American Airlines - at least it felt that way. Flight crew and atmosphere seemed more welcoming than American, too.

It was fine, mostly I was just happy to be on my last leg home. No in flight entertainment but that's forgivable since it was only a 2 hour flight.

Was delayed in Newark 24 hours due to mechanical problems. The staff was very helpful in trying to make the best of a trying situation. In SeaTac, they changed gates and times. Usually have no problems from SeaTac.

Flight was cancelled, then rebooked on a flight that I was unable to get through since they had closed the gate.

I truly love flying with Delta. They have always treated me with the upmost respect

Our flight attendant in FIRST CLASS was one of the worst I’ve ever had. She was not at all pleasant, nor particularly good at her service.

Everything went well and was good. Nothing exceptional, but no complaints either. Cheap seats are pretty comfortable.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The aircraft interior is old and tired on this aircraft. The entertainment system never worked despite the crews attempt to reset the system.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Old plane and old configuration/seats but still comfortable for a morning flight

After already paying for excess luggage prior to flight, i was advised AT check in that i had to pay $816 or forfeit my flight! The lady at the counter was SO rude and had already started offboarding me when i said i would pay it after asking her three times for the exact amount! Have lodged a formal complaint yet heard nothing. Will not ever travel via Qantas again

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.

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

My experience on this United Airlines flight was highly uncomfortable, primarily due to two issues: Cabin Temperature: The temperature on the Boeing 737 MAX 8 was unacceptably high, feeling consistently around 80 degrees throughout the flight. This made sleeping impossible and significantly detracted from the experience. Seating Arrangement: Being stuck in a middle seat for a six-and-a-half-hour overnight flight compounded the discomfort. Moving forward, I will always purchase a seat assignment to avoid this situation.

Premium Plus is a really good idea for longer flights

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

The person I bought the ticket for didn’t make the flight.

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

Over 40 years ago my AC return flight was canceled, during this last summer the same thing happened. AC denied everything Canadian like paying for accommodations and basic necessities. So why would I ever want to fly AC again? This last flight my wife took the return flight had problems and left late, so I guess they are getting better. However I have no faith in this airline so I drove to this last destination! I'll never fly AC again!!!

Great check in process in LA and good service The check in process as well as at the gate is way better in the US versus canada 🇨🇦

Super experience. Earlier than schedule departure and arrival. Baggage handling was very good

Allow me to book extra bag check in as free though I packed in 1 luggage but that was 7 LBS overweight so make another bag to free check in.

I would like to get my money back. I flight was 4 hours late on the way to detroit, And same on my way back to Brussels they cancelled my flight and give me an other ticket and i had to wait 5 hours.

All attendents were very efficient, pleasant and happy. Everything went smoothly. The seats could have been wider. There could have been more free food instead of just one small bar.

My seat was one of those that couldn't recline, but the problem was that it was abnormally upright, so the headrest actually made the seat concave, which was uncomfortable and hard on my lower back. I had to ball my jacket up and use it as lumbar support. goodness I had it with me.

Boarding was so so after zone 3 was called all other zones went in

I liked a lot , the flight attendant so nice ,the seat very comfortable I enjoyed the flight , I will do it again with Air Canada,

Plane left an hour late, I missed my connection and my bow case was never even loaded on the plane in VA. I deal with this type of nonsense everytime I fly air canada.

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

Information on your arrival and departure airports