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$689+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
1 adult, Economy
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Cheap 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 October 20, 2025.

Most accurate provider

Gurufare
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$1,170
(Trip.com)

One-way from

$689
(Qantas Airways)

Popular in

January

Cheapest in

September
Provider with most accurate pricing for Seattle/Tacoma Intl-Adelaide flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Adelaide flights.
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From Seattle/Tacoma Intl to Adelaide
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One-way flight from Seattle/Tacoma Intl to Adelaide
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Highest demand for flights based on searches. 16% potential increase in price ($273 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($86 potential savings vs. average RT price).
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Find 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 October 20, 2025.

This Trip.com deal was found by Cheapflights users on 10/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/293:40 pmSEA - ADL
2 stops57h 00mMultiple Airlines
Sun 12/73:25 pmADL - SEA
2 stops40h 25mMultiple Airlines
Deal found 10/18$1,170
This oojo deal was found by Cheapflights users on 10/18. 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.
Wed 12/36:05 amSEA - ADL
2 stops33h 15mQantas Airways
Wed 12/107:00 pmADL - SEA
2 stops37h 54mQantas Airways
Deal found 10/18$1,264
This Trip.com deal was found by Cheapflights users on 10/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:50 pmSEA - ADL
2 stops43h 55mMultiple Airlines
Wed 12/107:55 pmADL - SEA
2 stops44h 44mMultiple Airlines
Deal found 10/19$1,275
This Qantas Airways deal was found by Cheapflights users on 10/18. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:05 amSEA - ADL
2 stops36h 25mQantas Airways
Tue 12/95:10 pmADL - SEA
2 stops42h 48mQantas Airways
Deal found 10/18$1,419
This Qantas Airways deal was found by Cheapflights users on 10/18. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:05 amSEA - ADL
2 stops43h 00mQantas Airways
Mon 12/86:35 amADL - SEA
2 stops30h 15mQantas Airways
Deal found 10/18$1,450
This Qantas Airways deal was found by Cheapflights users on 10/18. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:05 amSEA - ADL
2 stops38h 50mQantas Airways
Sat 12/67:50 amADL - SEA
2 stops31h 15mQantas Airways
Deal found 10/18$1,455
This Qantas Airways deal was found by Cheapflights users on 10/18. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:05 amSEA - ADL
2 stops36h 25mQantas Airways
Sun 12/72:25 pmADL - SEA
2 stops42h 29mQantas Airways
Deal found 10/18$1,456
This Qantas Airways deal was found by Cheapflights users on 10/18. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:05 amSEA - ADL
2 stops38h 50mQantas Airways
Fri 12/57:00 pmADL - SEA
2 stops41h 50mQantas Airways
Deal found 10/18$1,461
This Qantas Airways deal was found by Cheapflights users on 10/18. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:05 amSEA - ADL
2 stops43h 00mQantas Airways
Thu 12/411:40 amADL - SEA
2 stops24h 18mQantas Airways
Deal found 10/18$1,488
This Qantas Airways deal was found by Cheapflights users on 10/18. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/22:59 pmSEA - ADL
2 stops25h 26mQantas Airways
Mon 12/86:35 amADL - SEA
2 stops26h 19mQantas Airways
Deal found 10/18$1,489
This Qantas Airways deal was found by Cheapflights users on 10/18. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/22:59 pmSEA - ADL
2 stops25h 26mQantas Airways
Wed 12/104:30 pmADL - SEA
2 stops43h 28mQantas Airways
Deal found 10/18$1,494

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 October 20, 2025.
Use the filters below to find and compare flights from Seattle to Adelaide that are best for you.

Fly from

Seattle

Fly to

Adelaide

Route

Depart

Return

Price

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 11/28

6:05 am-1:00 pm

2 stops36h 25m

Adelaide

Tue 12/9

5:10 pm-5:28 pm

2 stops42h 48m

$1,419

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 11/28

6:05 am-7:35 pm

2 stops43h 00m

Adelaide

Wed 12/10

12:35 pm-6:20 pm

2 stops24h 15m

$1,419

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 11/28

6:05 am-3:25 pm

2 stops38h 50m

Adelaide

Sat 12/6

7:50 am-8:35 pm

2 stops31h 15m

$1,455

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 11/28

6:05 am-1:00 pm

2 stops36h 25m

Adelaide

Sun 12/7

2:25 pm-2:24 pm

2 stops42h 29m

$1,456

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 12/2

2:59 pm-10:55 am

2 stops25h 26m

Adelaide

Mon 12/8

6:35 am-2:24 pm

2 stops26h 19m

$1,489

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 12/2

2:59 pm-10:55 am

2 stops25h 26m

Adelaide

Sun 12/7

4:30 pm-2:24 pm

2 stops40h 24m

$1,494

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 12/1

6:05 am-10:30 pm

2 stops45h 55m

Adelaide

Sat 12/6

6:05 am-8:35 pm

2 stops33h 00m

$1,497

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 11/27

6:05 am-10:30 pm

2 stops45h 55m

Adelaide

Mon 12/8

6:35 am-5:28 pm

2 stops29h 23m

$1,497

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 11/27

6:05 am-10:30 pm

2 stops45h 55m

Adelaide

Sat 12/6

7:50 am-6:20 pm

2 stops29h 00m

$1,497

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 11/29

6:05 am-7:15 pm

2 stops42h 40m

Adelaide

Mon 12/8

6:35 am-6:20 pm

2 stops30h 15m

$1,497

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

Showing 1-10 of 15 results
1
2

Compare providers for flights from Seattle to Adelaide

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Adelaide in October.
ProviderPrice AccuracyTrust Score*
GurufarePrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Adelaide flights, users find the pricing of Gurufare to be most consistent on Cheapflights vs. Gurufare Users can find the same prices on Seattle-Adelaide flight deals on Cheapflights vs. Gurufare >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 Gurufare the most. Gurufare 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.

Cheapflights Insights

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

What is the cheapest time of day to fly from SEA to ADL?

Find hourly flight availability from Seattle to Adelaide. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 20, 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Adelaide in the morning. If you’re flexible enough to do this you can expect to save up to 25% on your trip compared to booking a flight in the afternoon.

Reviews of airlines servicing Adelaide

Get insights into the airlines that provide service to Adelaide. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Adelaide. Reviews last updated October 20, 2025.
Read through reviews of airlines operating flights from Seattle to Adelaide, such as Qantas Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Qantas Airways
7.5
Good
922 reviews

Food

7.0

Comfort

7.5

Boarding

7.7

Overall

7.5

Entertainment

7.2

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.
Qantas Airways
7.5
Good
922 reviews
Qantas Airways
7.5
Good
922 reviews

Food

7.0

Comfort

7.5

Boarding

7.7

Overall

7.5

Entertainment

7.2

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.

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 $1,419, Qantas Airways can have you in Adelaide from Seattle in 36h 25m. Seattle and Adelaide are separated by a distance of 8332 mi.

  • What is the cheapest airline to fly from Seattle to Adelaide round-trip?

    Qantas Airways, at $1,088, was found to be the cheapest airline from Seattle to Adelaide.. This flight start at 22% lower than the current average price 3 months from now.

  • 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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Top airline flying from Seattle to Adelaide

Discover the top airline that operate flights from Seattle to Adelaide. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,166FlexibilityNo cancel feeOn-time74%

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