SEA - ADL

$628 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 1/20. 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
$1,012
Multiple Airlines
Fri 1/16Sun 1/25
SEA - ADL • 2 stops
Cheapest one-way
$628
Multiple Airlines
Tue 1/20
SEA - ADL • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
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

Fri, Jan 16 - Sun, Jan 25
Multiple Airlines Logo
3:40 pm - 6:50 pm
SEA
-
ADL
32h 40m2 stops
Multiple Airlines Logo
6:10 am - 9:31 am
ADL
-
SEA
21h 51m2 stops
$1,012Multiple Airlines
Thu, Jan 29 - Thu, Feb 5
Air Canada Logo
9:55 am - 4:20 pm
SEA
-
ADL
35h 55m2 stops
Air Canada Logo
6:10 am - 7:16 pm
ADL
-
SEA
31h 36m2 stops
$1,034Air Canada
Fri, Feb 13 - Sun, Feb 22
Multiple Airlines Logo
8:00 pm - 4:55 pm
SEA
-
ADL
26h 25m2 stops
Multiple Airlines Logo
7:00 pm - 9:15 am
ADL
-
SEA
32h 45m2 stops
$1,086Multiple Airlines
Fri, Feb 13 - Sat, Feb 21
Qantas Airways Logo
3:50 pm - 1:00 pm
SEA
-
ADL
26h 40m2 stops
Qantas Airways Logo
11:40 am - 6:57 pm
ADL
-
SEA
25h 47m2 stops
$1,132Qantas Airways
Sat, Feb 28 - Wed, Mar 4
Air Canada Logo
8:00 pm - 7:10 pm
SEA
-
ADL
28h 40m2 stops
Air Canada Logo
6:55 pm - 10:06 pm
ADL
-
SEA
45h 41m2 stops
$1,140Air Canada
Sat, Feb 28 - Wed, Mar 4
Air Canada Logo
8:00 pm - 10:30 pm
SEA
-
ADL
32h 00m2 stops
Air Canada Logo
6:55 pm - 9:31 am
ADL
-
SEA
33h 06m2 stops
$1,142Air Canada
Fri, Feb 13 - Sat, Feb 21
United Airlines Logo
11:59 pm - 9:30 am
SEA
-
ADL
39h 01m2 stops
United Airlines Logo
2:55 pm - 12:59 am
ADL
-
SEA
28h 34m1 stop
$1,218United Airlines
Fri, Feb 13 - Sat, Feb 21
United Airlines Logo
11:59 pm - 9:30 am
SEA
-
ADL
39h 01m2 stops
United Airlines Logo
2:55 pm - 6:03 pm
ADL
-
SEA
45h 38m3 stops
$1,242United Airlines
Wed, Jan 14 - Wed, Jan 21
Air Canada Logo
8:00 pm - 10:55 am
SEA
-
ADL
44h 25m2 stops
Air Canada Logo
7:55 pm - 9:15 am
ADL
-
SEA
31h 50m2 stops
$1,337Air Canada
Tue, Jan 13 - Sat, Feb 28
United Airlines Logo
12:35 pm - 10:55 am
SEA
-
ADL
27h 50m2 stops
United Airlines Logo
2:55 pm - 9:01 pm
ADL
-
SEA
24h 36m1 stop
$1,430United 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.

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

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

When flying from Seattle to Adelaide, you should consider leaving on a Wednesday and avoid Fridays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Tuesdays and the most expensive ones on Wednesdays.

Good to know

Low seasonSeptember
Cheapest flight$628
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly and prices are also 8% lower on average.
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 $628 for a one-way ticket and $1,012 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 946 reviews
7.5Comfort
7.2Entertainment
7.0Food
7.7Boarding
8.1Crew
Airline reviews

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

2.0 MediocreGerard, Nov 2025
CBR - BNE
Read more Qantas Airways reviews

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

Excellent as always, I won't fly to Australia, and back to the US on any other airline. The flight crew is always top notch, and have a way to make one feel extra special. Thank you for your service, I would rate Qantas Airways a 10+.

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 !

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

Information on your arrival and departure airports