SEA - ADL

$559 Find Cheap Flights from Seattle to Adelaide

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 Adelaide departing on 5/12. 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 Adelaide

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Adelaide, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Adelaide, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$971
Air Canada
Sun 5/3Sun 5/10
SEA - ADL • 2 stops
Cheapest one-way
$559
Multiple Airlines
Tue 5/12
SEA - ADL • 3 stops
Top airlines
Cheapest • from $971 (round-trip)
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Adelaide. You'll need at least 2 connections.
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We hope you love your trip to Adelaide!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Adelaide (SEA-ADL)

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

Sun, May 3 - Sun, May 10
Air Canada Logo
7:20 pm - 11:50 am
SEA
-
ADL
24h 00m
2 stops
Air Canada Logo
9:20 pm - 9:50 am
ADL
-
SEA
29h 00m
2 stops
$971Air Canada
Tue, May 5 - Tue, May 12
Multiple Airlines Logo
2:55 pm - 11:50 am
SEA
-
ADL
28h 25m
2 stops
Multiple Airlines Logo
5:15 pm - 2:20 pm
ADL
-
SEA
37h 35m
2 stops
$972Multiple Airlines
Sun, Apr 19 - Tue, Apr 28
Multiple Airlines Logo
8:00 pm - 11:50 am
SEA
-
ADL
23h 20m
2 stops
Multiple Airlines Logo
5:15 pm - 9:38 am
ADL
-
SEA
32h 53m
2 stops
$973Multiple Airlines
Thu, May 7 - Thu, May 14
Multiple Airlines Logo
2:55 pm - 1:55 pm
SEA
-
ADL
30h 30m
2 stops
Multiple Airlines Logo
5:15 pm - 10:05 am
ADL
-
SEA
33h 20m
2 stops
$1,047Multiple Airlines
Mon, Jul 6 - Fri, Jul 24
Multiple Airlines Logo
7:20 pm - 1:30 pm
SEA
-
ADL
25h 40m
2 stops
Multiple Airlines Logo
7:35 pm - 9:52 am
ADL
-
SEA
30h 47m
2 stops
$1,152Multiple Airlines
Mon, Jul 6 - Fri, Jul 24
Multiple Airlines Logo
7:20 pm - 1:30 pm
SEA
-
ADL
25h 40m
2 stops
Multiple Airlines Logo
7:35 pm - 9:52 am
ADL
-
SEA
30h 47m
2 stops
$1,153Multiple Airlines
Mon, Jul 6 - Fri, Jul 24
Multiple Airlines Logo
7:20 pm - 1:55 pm
SEA
-
ADL
26h 05m
2 stops
Multiple Airlines Logo
7:35 pm - 9:52 am
ADL
-
SEA
30h 47m
2 stops
$1,159Multiple Airlines
Fri, May 8 - Tue, May 12
Air Canada Logo
10:45 am - 3:55 pm
SEA
-
ADL
36h 40m
2 stops
Air Canada Logo
8:00 pm - 10:05 am
ADL
-
SEA
30h 35m
2 stops
$1,186Air Canada
Fri, May 8 - Tue, May 12
Air Canada Logo
7:20 pm - 3:55 pm
SEA
-
ADL
28h 05m
2 stops
Air Canada Logo
4:30 pm - 9:50 am
ADL
-
SEA
33h 50m
2 stops
$1,187Air Canada
Tue, May 5 - Tue, May 12
Multiple Airlines Logo
7:06 pm - 1:35 pm
SEA
-
ADL
25h 59m
3 stops
Multiple Airlines Logo
6:00 am - 1:01 pm
ADL
-
SEA
23h 31m
2 stops
$1,358Multiple Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Adelaide flights

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

Which airlines provide the cheapest flights from Seattle to Adelaide?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Seattle to Adelaide were found on Air Canada ($971) and United Airlines ($1,527).

Good to know

Cheapest flight$559
Flight from Seattle to Adelaide

When to book flights from Seattle to Adelaide

Are your dates flexible? Find out the best times to travel from Seattle to Adelaide based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Adelaide

  • What is the cheapest flight from Seattle to Adelaide?

    In the last 3 days, the lowest price for a flight from Seattle to Adelaide was $559 for a one-way ticket and $971 for a round-trip.

  • Do I need a passport to fly between Seattle and Adelaide?

    Yes

  • Which aircraft models fly most regularly from Seattle to Adelaide?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Adelaide?

    oneworld is the only airline alliance operating flights between Seattle and Adelaide.

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

    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 Adelaide.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Adelaide from Seattle 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 Adelaide?

    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 to Adelaide with an airline and back to Seattle with another airline. Booking your flights between Seattle and ADL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Adelaide?

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

Reviews of the top airline flying from Seattle to Adelaide

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Adelaide. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Adelaide? 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.
7.5
Qantas AirwaysOverall score based on 1009 reviews
7.7Boarding
7.4Comfort
7.2Entertainment
8.1Crew
7.0Food
Airline reviews

This was the worst flight I’ve been on. Getting on the plane where is was 30 degrees outside was hotter on board cabin must’ve been 33 degrees. This is a health hazard. They cannot be doing this to save on fuel. People could die from this!!. Fans and a/c was, off entertainment was off. Poor excuse given. Crew made the excuse that the system didn’t have enough power. They basically were operating on one engine to save on jet fuel till 3 hours later on cruising altitude and they then started the second engine. And finally the cabin was cooled. On a 7hour red eye flight this made it so uncomfortable and impossible to sleep.

2.0 MediocreAnonymous, Mar 2026
SIN - MEL
Read more Qantas Airways reviews

This was the worst flight I’ve been on. Getting on the plane where is was 30 degrees outside was hotter on board cabin must’ve been 33 degrees. This is a health hazard. They cannot be doing this to save on fuel. People could die from this!!. Fans and a/c was, off entertainment was off. Poor excuse given. Crew made the excuse that the system didn’t have enough power. They basically were operating on one engine to save on jet fuel till 3 hours later on cruising altitude and they then started the second engine. And finally the cabin was cooled. On a 7hour red eye flight this made it so uncomfortable and impossible to sleep.

My experience was great overall. Tanya was particularly friendly and helpful the entire trip. I was very pleased with her customer service skills. The plane was an older aircraft but the entire way was comfortable with barely any turbulence at all. Qantas should speed up its fleet renovation. Totally recommend using this airline.

Qantas is always subpar beyond comfy chairs for a domestic flight

I liked boarding the plane. The staff were rude, the food was appalling and the chairs the most uncomfortable I have ever experienced

an hour late, then had to disembark on back stairs and take 4 flights up to get to main airport. No warning, and difficulty for those with canes and poor knees.

Well my expórtenle with Qantas it wasn’t that good KLM from Bs Aires was delay Santiago Chile Qantas QF 028 was still in the airport but the crew didn’t opened the door for me soo I lost my fly And I stuck in the airport 13 hrs waiting for next fly by Latam Arline My question is can I have my money back for business class

It was ok, the additional baggage charges were a bit excessive given winter is a time for skiing. To have to pay $600 extra for skis was tantamount to robbery. Airlines should consider sporting goods as baggage. Likewise, they should consider increasing the number of bags allowed on international flights to known ski destinations.

Flight was canceled. I was not alerted. It was only kayak that alerted me

Flight was 2.5 hours late leaving. We spent 50 minutes of that sitting on the plane with no explanation. They did reduce the time in the air so we arrived a little less late which was something. The cheese and crackers were okay but the wine was terrible.

Couldn't access entertainment on app as said in an email

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

Information on your arrival and departure airports