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$588+ 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 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Aug 3 — Aug 101
Mon 8/3
Mon 8/10
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 4, 2026.

This United Airlines deal was found by Cheapflights users on 7/1. 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.
Wed 7/295:20 pm
SEA
-
ADL
2 stops25h 15m
United Airlines
Tue 8/116:05 am
ADL
-
SEA
2 stops31h 08m
United Airlines
Deal found 7/1$1,165
This United Airlines deal was found by Cheapflights users on 6/29. 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.
Wed 8/126:52 pm
SEA
-
ADL
2 stops22h 43m
United Airlines
Wed 8/196:05 am
ADL
-
SEA
2 stops28h 54m
United Airlines
Deal found 6/29$1,166
This United Airlines deal was found by Cheapflights users on 6/30. 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 8/21:30 pm
SEA
-
ADL
2 stops29h 10m
United Airlines
Sun 8/166:05 am
ADL
-
SEA
2 stops31h 08m
United Airlines
Deal found 6/30$1,168
This United Airlines deal was found by Cheapflights users on 6/30. 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.
Tue 7/287:05 pm
SEA
-
ADL
2 stops23h 30m
United Airlines
Tue 8/48:00 pm
ADL
-
SEA
3 stops41h 40m
United Airlines
Deal found 6/30$1,173
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Mon 7/610:29 am
SEA
-
ADL
2 stops32h 06m
United Airlines
Fri 7/246:05 am
ADL
-
SEA
2 stops25h 01m
United Airlines
Deal found 7/1$1,215
This United Airlines deal was found by Cheapflights users on 7/1. 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 7/317:00 am
SEA
-
ADL
2 stops35h 40m
United Airlines
Wed 8/196:05 am
ADL
-
SEA
3 stops31h 40m
United Airlines
Deal found 7/1$1,225
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Wed 12/91:16 pm
SEA
-
ADL
2 stops29h 14m
United Airlines
Mon 12/212:55 pm
ADL
-
SEA
1 stop19h 29m
United Airlines
Deal found 7/2$1,258
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Tue 12/83:30 pm
SEA
-
ADL
2 stops30h 20m
United Airlines
Mon 12/212:55 pm
ADL
-
SEA
1 stop24h 23m
United Airlines
Deal found 7/2$1,261
This FlightHub deal was found by Cheapflights users on 6/29. 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 6/29$1,262

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 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,165
(United Airlines)

One-way from

$588
(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 July 4, 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

Wed 7/29

5:20 pm-11:05 am

2 stops25h 15m

Adelaide

Tue 8/11

6:05 am-8:43 pm

2 stops31h 08m

$1,165

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 8/16

9:05 am-1:45 pm

2 stops36h 10m

Adelaide

Sun 8/23

6:05 am-6:29 pm

2 stops28h 54m

$1,166

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 8/2

1:30 pm-11:10 am

2 stops29h 10m

Adelaide

Sun 8/16

6:05 am-8:43 pm

2 stops31h 08m

$1,168

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

10:29 am-11:05 am

2 stops32h 06m

Adelaide

Fri 7/24

6:05 am-2:36 pm

2 stops25h 01m

$1,215

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 7/31

7:00 am-11:10 am

2 stops35h 40m

Adelaide

Wed 8/19

6:05 am-2:24 pm

2 stops24h 49m

$1,225
Quickest round-trip

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 8/21

6:52 pm-10:05 am

2 stops22h 43m

Adelaide

Sat 9/5

6:05 am-8:43 pm

2 stops31h 08m

$1,266

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

7:20 pm-1:30 pm

2 stops25h 40m

Adelaide

Fri 7/24

7:35 pm-10:07 am

2 stops31h 02m

$1,324
Cheapest one-way

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 7/28

10:34 am-11:35 am

2 stops32h 31m

$588
Quickest one-way

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 8/24

7:35 pm-11:05 am

2 stops23h 00m

$593

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 8/24

5:20 pm-11:05 am

2 stops25h 15m

$598

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Sorted by cheapest first
  • 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 $1,165, United Airlines can have you in Adelaide from Seattle in 25h 15m. 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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