HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Adelaide

$669+ 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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Aug 31 — Sep 71
Mon 8/31
Mon 9/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Adelaide with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 August 1, 2026.

This United Airlines deal was found by Cheapflights users on 7/30. 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 8/25:04 pm
SEA
-
ADL
2 stops25h 21m
United Airlines
Sun 8/166:05 am
ADL
-
SEA
2 stops21h 59m
United Airlines
Deal found 7/30$1,229
This oojo deal was found by Cheapflights users on 8/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/204:25 pm
SEA
-
ADL
1 stop30h 05m
Qatar Airways
Sat 11/710:00 pm
ADL
-
SEA
1 stop32h 10m
Qatar Airways
Deal found 8/1$1,270
This oojo deal was found by Cheapflights users on 7/31. 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 stops25h 19m
Multiple Airlines
Deal found 7/31$1,274
This oojo deal was found by Cheapflights users on 8/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/154:59 pm
SEA
-
ADL
2 stops26h 26m
Qantas Airways
Tue 9/2211:50 am
ADL
-
SEA
2 stops24h 19m
Qantas Airways
Deal found 8/1$1,276
This United Airlines deal was found by Cheapflights users on 7/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:32 pm
SEA
-
ADL
2 stops44h 53m
United Airlines
Wed 1/62:55 pm
ADL
-
SEA
2 stops37h 34m
United Airlines
Deal found 7/27$1,278
This Air Canada deal was found by Cheapflights users on 7/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/133:00 pm
SEA
-
ADL
2 stops28h 20m
Air Canada
Sun 9/208:00 pm
ADL
-
SEA
2 stops34h 52m
Air Canada
Deal found 7/30$1,294
This FlightHub deal was found by Cheapflights users on 8/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/203:00 pm
SEA
-
ADL
2 stops29h 25m
Air Canada
Sat 11/75:05 pm
ADL
-
SEA
2 stops43h 47m
Air Canada
Deal found 8/1$1,297
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Sat 11/2111:59 pm
SEA
-
ADL
2 stops43h 26m
United Airlines
Sat 1/92:50 pm
ADL
-
SEA
2 stops43h 34m
United Airlines
Deal found 7/28$1,298

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 August 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,274
(oojo)

One-way from

$669
(American 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
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 August 1, 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
Quickest round-trip

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 8/21

7:20 am-10:35 pm

2 stops22h 45m

Adelaide

Sat 9/5

12:40 pm-9:29 pm

2 stops25h 19m

$1,274

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 12/5

7:32 pm-10:55 am

2 stops44h 53m

Adelaide

Wed 1/6

2:55 pm-9:59 am

2 stops37h 34m

$1,278

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 8/21

4:25 pm-3:00 pm

1 stop30h 05m

Adelaide

Sat 9/5

10:00 pm-12:45 pm

1 stop31h 15m

$1,309

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 9/15

1:10 pm-11:05 am

2 stops29h 25m

Adelaide

Tue 9/22

8:00 pm-9:15 pm

3 stops41h 45m

$1,330

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 1/5

3:50 pm-5:05 pm

1 stop30h 45m

Adelaide

Sat 1/30

10:00 pm-11:40 am

1 stop32h 10m

$1,330

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 10/28

7:55 am-6:15 pm

2 stops40h 50m

Adelaide

Sun 11/1

5:10 pm-8:41 am

2 stops33h 01m

$1,337

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 1/5

12:15 pm-1:00 pm

2 stops30h 15m

Adelaide

Sat 1/30

11:35 am-11:33 am

2 stops42h 28m

$1,377

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 10/28

4:50 pm-4:30 pm

1 stop30h 10m

Adelaide

Sun 11/1

10:00 pm-11:40 am

1 stop32h 10m

$1,523

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 10/20

11:45 am-11:15 am

2 stops30h 00m

Adelaide

Sat 11/7

10:10 am-8:52 am

3 stops41h 12m

$1,694
Cheapest one-way
Quickest one-way

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 10/11

4:37 pm-1:40 pm

2 stops27h 33m

$669

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 12 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 $1,309, United Airlines can have you in Adelaide from Seattle in 30h 05m. 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.