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$531+ Cheap flights from Seattle (SEA) to Adelaide (ADL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Jul 27 — Aug 31
Mon 7/27
Mon 8/3
1 adult, Economy
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Cheap flight deals from Seattle to Adelaide

Cheapest flights from Seattle to Adelaide
Explore the most affordable flight options available from Seattle to Adelaide. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 27, 2026.

This FlightHub deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/306:36 pm
SEA
-
ADL
2 stops23h 59m
Qantas Airways
Tue 8/2511:50 am
ADL
-
SEA
2 stops24h 19m
Qantas Airways
Deal found 6/27$1,262
This FlightHub deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/23:00 pm
SEA
-
ADL
2 stops27h 40m
Multiple Airlines
Sun 8/168:00 pm
ADL
-
SEA
2 stops30h 37m
Multiple Airlines
Deal found 6/27$1,292
This Air Canada deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/83:00 pm
SEA
-
ADL
2 stops28h 20m
Multiple Airlines
Tue 9/297:35 pm
ADL
-
SEA
2 stops31h 02m
Multiple Airlines
Deal found 6/22$1,296
This Air Canada deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/27:20 pm
SEA
-
ADL
2 stops30h 20m
Air Canada
Mon 8/176:55 pm
ADL
-
SEA
2 stops35h 57m
Air Canada
Deal found 6/23$1,301
This BusinessClass deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:20 am
SEA
-
ADL
2 stops22h 45m
Multiple Airlines
Sat 9/58:50 am
ADL
-
SEA
2 stops31h 33m
Multiple Airlines
Deal found 6/27$1,302
This SmartFares deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/148:00 am
SEA
-
ADL
2 stops22h 05m
Multiple Airlines
Fri 8/282:25 pm
ADL
-
SEA
2 stops25h 58m
Multiple Airlines
Deal found 6/23$1,305

Find flight deals from Seattle to Adelaide

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Adelaide (ADL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,292
(Justfly.com)

One-way from

$531
(Kiwi.com)
Provider with most accurate pricing for Seattle/Tacoma Intl-Adelaide flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Adelaide flights.
Search Deals
From Seattle/Tacoma Intl to Adelaide
Search Deals
One-way flight from Seattle/Tacoma Intl to Adelaide
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Adelaide that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 27, 2026.
Use the filters below to find and compare flights from Seattle to Adelaide that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 8/2

3:00 pm-11:10 am

2 stops27h 40m

Adelaide

Sun 8/16

8:00 pm-10:07 am

2 stops30h 37m

$1,292

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 8/2

7:20 pm-6:10 pm

2 stops30h 20m

Adelaide

Mon 8/17

6:55 pm-2:22 pm

2 stops35h 57m

$1,301

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 8/6

9:09 pm-10:35 pm

2 stops32h 56m

Adelaide

Thu 8/13

3:00 pm-11:59 pm

2 stops25h 29m

$1,312

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 8/2

6:48 pm-1:45 pm

2 stops26h 27m

Adelaide

Sun 8/16

6:05 am-9:15 pm

3 stops31h 40m

$1,454
Quickest round-trip

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 9/8

1:10 pm-10:55 am

2 stops29h 15m

Adelaide

Wed 9/30

6:05 am-12:23 pm

2 stops22h 48m

$1,468

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 8/20

7:35 pm-1:45 pm

2 stops25h 40m

Adelaide

Thu 9/3

6:05 am-4:14 pm

2 stops26h 39m

$1,540

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 7/8

4:20 pm-10:35 pm

2 stops37h 45m

Adelaide

Tue 7/21

2:25 pm-11:59 pm

2 stops26h 04m

$1,557

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 8/6

5:20 pm-1:45 pm

2 stops27h 55m

Adelaide

Thu 8/13

8:00 pm-9:15 pm

3 stops41h 45m

$1,563

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 8/21

4:25 pm-3:00 pm

1 stop30h 05m

Adelaide

Sat 9/5

6:20 pm-12:45 pm

2 stops34h 55m

$1,613
Cheapest one-way

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 9/14

8:48 pm-11:35 am

2 stops46h 17m

$541

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/22

Showing 1-10 of 15 resultsSorted by cheapest first
1
2
  • Most accurate provider: When it comes to deals on Seattle-Adelaide flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Adelaide flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Adelaide flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Adelaide flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Adelaide flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Adelaide

Have a flexible travel schedule? Discover the best time to fly to Adelaide from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Adelaide. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Adelaide?

    For as low as $1,454, Air Canada can have you in Adelaide from Seattle in 26h 27m. Seattle and Adelaide are separated by a distance of 8332 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Seattle to Adelaide that include hotel bookings?

    Yes. In addition to deals on Seattle to Adelaide flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Adelaide?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Adelaide.

  • Can I find deals for business class flights from Seattle to Adelaide?

    Yes. Cheapflights offers flight deals from Seattle to Adelaide by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Adelaide?

Book flights to Adelaide if you plan to visit one of these locations
Glenelg

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