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$695+ 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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
May 1 — May 81
Fri 5/1
Fri 5/8
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 April 1, 2026.

This Air Canada deal was found by Cheapflights users on 3/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/137:20 pm
SEA
-
ADL
2 stops26h 05m
Multiple Airlines
Wed 5/205:15 pm
ADL
-
SEA
2 stops33h 20m
Multiple Airlines
Deal found 3/29$1,006
This Air Canada deal was found by Cheapflights users on 3/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:20 pm
SEA
-
ADL
2 stops24h 00m
Multiple Airlines
Tue 5/195:15 pm
ADL
-
SEA
2 stops33h 20m
Multiple Airlines
Deal found 3/27$1,021
This Air Canada deal was found by Cheapflights users on 3/31. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/67:20 pm
SEA
-
ADL
2 stops26h 05m
Multiple Airlines
Fri 7/247:35 pm
ADL
-
SEA
2 stops31h 02m
Multiple Airlines
Deal found 3/31$1,061
This Air Canada deal was found by Cheapflights users on 3/31. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/157:20 pm
SEA
-
ADL
2 stops28h 05m
Multiple Airlines
Fri 5/225:15 pm
ADL
-
SEA
2 stops33h 20m
Multiple Airlines
Deal found 3/31$1,193
This Air Canada deal was found by Cheapflights users on 3/31. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/313:05 pm
SEA
-
ADL
2 stops29h 20m
Air Canada
Wed 11/46:10 am
ADL
-
SEA
2 stops34h 16m
Air Canada
Deal found 3/31$1,518
This United Airlines deal was found by Cheapflights users on 3/27. 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.
Tue 5/127:36 pm
SEA
-
ADL
2 stops22h 59m
United Airlines
Tue 5/194:30 pm
ADL
-
SEA
3 stops45h 06m
United Airlines
Deal found 3/27$1,644

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 April 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,006
(Air Canada)

One-way from

$694
(Air Canada)
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 April 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

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 5/12

5:06 pm-10:00 pm

3 stops36h 24m

Adelaide

Tue 5/19

6:25 am-6:56 pm

3 stops29h 01m

$1,400

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 5/12

7:36 pm-11:05 am

2 stops22h 59m

Adelaide

Tue 5/19

4:30 pm-9:06 pm

3 stops45h 06m

$1,644
Quickest round-trip

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 5/13

4:30 pm-1:55 pm

2 stops28h 55m

Adelaide

Wed 5/20

6:00 am-6:30 pm

3 stops29h 00m

$2,223

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 5/15

7:00 am-6:25 pm

3 stops42h 55m

Adelaide

Fri 5/22

12:00 pm-10:05 am

2 stops38h 35m

$2,320

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 5/13

5:15 pm-8:05 pm

1 stop34h 20m

Adelaide

Wed 5/20

10:00 pm-1:25 pm

1 stop31h 55m

$2,455

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 5/12

4:30 pm-3:50 pm

1 stop30h 50m

Adelaide

Tue 5/19

9:40 pm-12:45 pm

1 stop31h 35m

$2,459

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 5/13

7:35 am-10:00 pm

2 stops21h 55m

Adelaide

Wed 5/20

9:10 am-8:45 am

1 stop40h 05m

$2,484

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 5/15

5:15 pm-8:05 pm

1 stop34h 20m

Adelaide

Fri 5/22

10:00 pm-1:25 pm

1 stop31h 55m

$2,505

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 5/15

6:00 pm-7:00 am

3 stops44h 30m

Adelaide

Fri 5/22

9:45 am-4:00 pm

3 stops46h 45m

$3,550
Cheapest one-way
Quickest one-way

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 5/17

7:20 pm-11:50 am

2 stops24h 00m

$695

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 14 resultsSorted by cheapest first
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 April.
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 April 1, 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
1,016 reviews

Crew

8.1

Food

7.0

Comfort

7.4

Overall

7.5

Boarding

7.7

Entertainment

7.2

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.
Qantas Airways
7.5
Good
1,016 reviews
Qantas Airways
7.5
Good
1,016 reviews

Crew

8.1

Food

7.0

Comfort

7.4

Overall

7.5

Boarding

7.7

Entertainment

7.2

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.

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 $1,644, United Airlines can have you in Adelaide from Seattle in 22h 59m. 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.

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

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