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$664+ 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Aug 11 — Aug 181
Tue 8/11
Tue 8/18
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 July 12, 2026.

This United Airlines deal was found by Cheapflights users on 7/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/26:48 pm
SEA
-
ADL
2 stops23h 52m
United Airlines
Sun 8/166:05 am
ADL
-
SEA
2 stops26h 39m
United Airlines
Deal found 7/10$1,174
This oojo deal was found by Cheapflights users on 7/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:10 pm
SEA
-
ADL
2 stops23h 45m
Qantas Airways
Thu 8/2711:50 am
ADL
-
SEA
2 stops24h 19m
Qantas Airways
Deal found 7/10$1,259
This oojo deal was found by Cheapflights users on 7/9. 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 oojo 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 9/512:40 pm
ADL
-
SEA
2 stops27h 43m
Multiple Airlines
Deal found 7/9$1,267
This oojo deal was found by Cheapflights users on 7/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:58 pm
SEA
-
ADL
2 stops24h 57m
Qantas Airways
Sat 9/511:50 am
ADL
-
SEA
2 stops24h 19m
Qantas Airways
Deal found 7/7$1,272
This United Airlines deal was found by Cheapflights users on 7/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:52 pm
SEA
-
ADL
2 stops22h 43m
United Airlines
Sat 9/56:05 am
ADL
-
SEA
2 stops31h 08m
United Airlines
Deal found 7/8$1,278
This oojo deal was found by Cheapflights users on 7/8. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/94:20 pm
SEA
-
ADL
2 stops37h 45m
Multiple Airlines
Thu 7/1612:40 pm
ADL
-
SEA
2 stops27h 49m
Multiple Airlines
Deal found 7/8$1,279
This United Airlines deal was found by Cheapflights users on 7/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2010:55 am
SEA
-
ADL
2 stops31h 30m
United Airlines
Thu 8/278:00 pm
ADL
-
SEA
3 stops41h 45m
United Airlines
Deal found 7/10$1,280
This oojo deal was found by Cheapflights users on 7/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/214:25 pm
SEA
-
ADL
1 stop30h 05m
Qatar Airways
Sat 9/510:00 pm
ADL
-
SEA
1 stop31h 15m
Qatar Airways
Deal found 7/9$1,301

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 July 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,174
(United Airlines)

One-way from

$664
(United Airlines)
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
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One-way flight from Seattle/Tacoma Intl to Adelaide
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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 July 12, 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

10:29 am-11:10 am

2 stops32h 11m

Adelaide

Sun 8/16

6:05 am-9:15 pm

3 stops31h 40m

$1,174
Quickest round-trip

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 8/5

7:05 pm-11:10 am

2 stops23h 35m

Adelaide

Wed 8/19

6:05 am-9:15 pm

3 stops31h 40m

$1,175

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 8/20

10:55 am-10:55 am

2 stops31h 30m

Adelaide

Thu 8/27

8:00 pm-9:15 pm

3 stops41h 45m

$1,280

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 8/20

10:40 am-3:00 pm

2 stops35h 50m

Adelaide

Thu 8/27

10:00 pm-12:45 pm

1 stop31h 15m

$1,700

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 8/21

6:49 am-1:35 pm

3 stops38h 16m

Adelaide

Sat 9/5

8:50 am-10:56 am

3 stops42h 36m

$1,883
Cheapest one-way
Quickest one-way

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 8/7

7:05 pm-11:05 am

2 stops23h 30m

$664

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 11/30

7:00 am-8:45 am

2 stops31h 15m

$734

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 8/8

8:13 pm-9:55 pm

3 stops57h 12m

$764

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 8/7

8:00 am-8:00 am

3 stops31h 30m

$783

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 12/17

11:59 pm-9:30 am

2 stops63h 01m

$939

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/9

Showing 1-10 of 14 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 $1,174, United Airlines can have you in Adelaide from Seattle in 32h 11m. Seattle and Adelaide are separated by a distance of 8332 mi.

  • 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

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