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$696+ 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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Jun 25 — Jul 21
Thu 6/25
Thu 7/2
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 May 26, 2026.

This Alaska Airlines deal was found by Cheapflights users on 5/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:35 pm
SEA
-
ADL
2 stops43h 10m
Multiple Airlines
Sun 11/811:40 am
ADL
-
SEA
2 stops28h 18m
Multiple Airlines
Deal found 5/24$1,341
This Ovago deal was found by Cheapflights users on 5/22. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/68:00 am
SEA
-
ADL
2 stops22h 05m
Multiple Airlines
Fri 7/242:25 pm
ADL
-
SEA
2 stops26h 04m
Multiple Airlines
Deal found 5/22$1,479
This United Airlines deal was found by Cheapflights users on 5/21. 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 7/61:30 pm
SEA
-
ADL
2 stops29h 05m
United Airlines
Fri 7/246:05 am
ADL
-
SEA
2 stops29h 28m
United Airlines
Deal found 5/21$1,480
This United Airlines deal was found by Cheapflights users on 5/24. 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 12/2611:59 pm
SEA
-
ADL
2 stops63h 01m
United Airlines
Tue 1/59:30 am
ADL
-
SEA
2 stops44h 33m
United Airlines
Deal found 5/24$1,651
This KAYAK deal was found by Cheapflights users on 5/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/63:00 pm
SEA
-
ADL
2 stops27h 25m
Air New Zealand
Fri 7/246:25 am
ADL
-
SEA
3 stops28h 37m
Air New Zealand
Deal found 5/25$1,861
This oojo deal was found by Cheapflights users on 5/22. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/217:13 pm
SEA
-
ADL
2 stops45h 12m
Qantas Airways
Sun 1/106:00 am
ADL
-
SEA
2 stops27h 12m
Qantas Airways
Deal found 5/22$2,113
This United Airlines deal was found by Cheapflights users on 5/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/213:30 pm
SEA
-
ADL
1 stop23h 30m
United Airlines
Sun 1/106:00 am
ADL
-
SEA
2 stops34h 26m
United Airlines
Deal found 5/22$2,207
This BusinessClass deal was found by Cheapflights users on 5/24. 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.
Sat 12/2610:10 am
SEA
-
ADL
2 stops30h 15m
Air New Zealand
Tue 1/56:25 am
ADL
-
SEA
3 stops30h 27m
Air New Zealand
Deal found 5/24$2,387
This oojo deal was found by Cheapflights users on 5/24. 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.
Sat 12/268:45 am
SEA
-
ADL
1 stop29h 35m
Singapore Airlines
Tue 1/510:15 am
ADL
-
SEA
1 stop39h 25m
Singapore Airlines
Deal found 5/24$2,574
This Ovago deal was found by Cheapflights users on 5/22. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2110:50 am
SEA
-
ADL
1 stop29h 10m
Cathay Pacific
Sun 1/1012:00 pm
ADL
-
SEA
1 stop39h 40m
Cathay Pacific
Deal found 5/22$2,635

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 May 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,341
(Alaska Airlines)

One-way from

$696
(SmartFares)
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 May 26, 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 11/4

6:35 pm-1:45 pm

2 stops48h 40m

Adelaide

Sun 11/8

5:10 pm-9:28 pm

2 stops22h 48m

$1,341
Quickest round-trip

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

8:00 am-10:35 pm

2 stops22h 05m

Adelaide

Fri 7/24

2:25 pm-11:59 pm

2 stops26h 04m

$1,479

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

1:30 pm-11:05 am

2 stops29h 05m

Adelaide

Fri 7/24

6:05 am-2:36 pm

2 stops25h 01m

$1,480

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 11/4

4:05 pm-8:50 pm

1 stop34h 15m

Adelaide

Sun 11/8

10:40 pm-12:35 pm

1 stop32h 25m

$2,710

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 11/4

4:05 pm-5:05 pm

1 stop30h 30m

Adelaide

Sun 11/8

10:00 pm-11:40 am

1 stop32h 10m

$2,792

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

5:15 pm-8:05 pm

1 stop34h 20m

Adelaide

Fri 7/24

10:00 pm-1:25 pm

1 stop31h 55m

$3,177
Cheapest one-way
Quickest one-way

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 11/7

5:55 pm-1:40 pm

2 stops25h 15m

$696

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 11/7

8:45 am-8:50 am

1 stop53h 35m

$1,113

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/21

Sorted by cheapest first

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 May.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice 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 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.

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 May 26, 2026.
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
1,042 reviews

Food

7.0

Overall

7.5

Comfort

7.5

Crew

8.1

Boarding

7.7

Entertainment

7.2

Reviews

1 / 20
2.0
Mediocre

Midhat,Apr 2026

AKL - ADL

Poor as usual. Flight was delayed for more than 4 hours. The Staff was rude. Food was terrible. Very unreliable, unprofessional and unpleasant.
Qantas Airways
7.5
Good
1,042 reviews
Qantas Airways
7.5
Good
1,042 reviews

Food

7.0

Overall

7.5

Comfort

7.5

Crew

8.1

Boarding

7.7

Entertainment

7.2

Reviews

1 / 20
2.0
Mediocre

Midhat,Apr 2026

AKL - ADL

Poor as usual. Flight was delayed for more than 4 hours. The Staff was rude. Food was terrible. Very unreliable, unprofessional and unpleasant.

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.

  • 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..

  • 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 May 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,211FlexibilityNo cancel feeOn-time74%

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