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$564+ 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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Mar 13 — Mar 201
Fri 3/13
Fri 3/20
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 February 11, 2026.

This Air Canada deal was found by Cheapflights users on 2/9. 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 stops25h 40m
Multiple Airlines
Fri 7/247:35 pm
ADL
-
SEA
2 stops30h 12m
Multiple Airlines
Deal found 2/9$998
This Air Canada deal was found by Cheapflights users on 2/9. 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 5/117:20 pm
SEA
-
ADL
2 stops24h 00m
Multiple Airlines
Thu 5/145:15 pm
ADL
-
SEA
2 stops32h 30m
Multiple Airlines
Deal found 2/9$1,005
This BusinessClass deal was found by Cheapflights users on 2/9. 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.
Thu 10/15:55 pm
SEA
-
ADL
2 stops25h 10m
Multiple Airlines
Thu 10/81:35 pm
ADL
-
SEA
2 stops24h 00m
Multiple Airlines
Deal found 2/9$1,074
This Air Canada deal was found by Cheapflights users on 2/9. 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.
Thu 3/268:00 pm
SEA
-
ADL
2 stops23h 10m
Multiple Airlines
Thu 4/26:10 am
ADL
-
SEA
2 stops20h 53m
Multiple Airlines
Deal found 2/9$1,103
This oojo deal was found by Cheapflights users on 2/10. 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 7/62:32 pm
SEA
-
ADL
2 stops28h 03m
Qantas Airways
Fri 7/248:05 pm
ADL
-
SEA
2 stops42h 00m
Qantas Airways
Deal found 2/10$1,213
This Alaska Airlines deal was found by Cheapflights users on 2/9. 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.
Mon 6/17:35 am
SEA
-
ADL
2 stops22h 30m
Multiple Airlines
Sun 6/148:50 am
ADL
-
SEA
2 stops37h 40m
Multiple Airlines
Deal found 2/9$1,219
This Alaska Airlines deal was found by Cheapflights users on 2/10. 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.
Sun 11/18:40 pm
SEA
-
ADL
2 stops41h 05m
Multiple Airlines
Sun 11/155:10 pm
ADL
-
SEA
2 stops21h 20m
Multiple Airlines
Deal found 2/10$1,221
This Trip.com deal was found by Cheapflights users on 2/8. 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 3/256:24 pm
SEA
-
ADL
2 stops29h 51m
Multiple Airlines
Wed 4/16:00 am
ADL
-
SEA
2 stops28h 14m
Multiple Airlines
Deal found 2/8$1,310
This Alaska Airlines deal was found by Cheapflights users on 2/9. 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.
Mon 6/17:35 am
SEA
-
ADL
2 stops22h 30m
Multiple Airlines
Sat 6/2012:40 pm
ADL
-
SEA
2 stops35h 15m
Multiple Airlines
Deal found 2/9$1,312
This Alaska Airlines deal was found by Cheapflights users on 2/9. 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.
Mon 6/17:35 am
SEA
-
ADL
2 stops22h 30m
Multiple Airlines
Thu 6/1812:40 pm
ADL
-
SEA
2 stops25h 35m
Multiple Airlines
Deal found 2/9$1,340
This Cathay Pacific deal was found by Cheapflights users on 2/9. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:45 am
SEA
-
ADL
2 stops36h 10m
Cathay Pacific
Thu 10/87:50 am
ADL
-
SEA
3 stops42h 32m
Cathay Pacific
Deal found 2/9$1,351

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 February 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$998
(Air Canada)

One-way from

$564
(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 February 11, 2026.
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

Thu 3/26

8:00 pm-12:40 pm

2 stops23h 10m

Adelaide

Thu 4/2

6:10 am-9:33 am

2 stops20h 53m

$1,103

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 3/25

6:24 pm-5:45 pm

2 stops29h 51m

Adelaide

Wed 4/1

6:00 am-4:44 pm

2 stops28h 14m

$1,310

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/15

4:50 pm-1:45 pm

2 stops26h 25m

Adelaide

Thu 2/19

7:50 am-6:57 pm

2 stops29h 37m

$1,402

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 3/25

8:10 am-5:45 pm

3 stops40h 05m

Adelaide

Wed 4/1

6:00 am-10:05 am

2 stops45h 35m

$1,551

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 3/25

5:05 pm-5:05 pm

1 stop30h 30m

Adelaide

Wed 4/1

7:20 pm-12:25 pm

2 stops34h 35m

$1,656

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/15

9:19 am-10:55 am

2 stops31h 06m

Adelaide

Thu 2/19

7:15 am-9:01 pm

3 stops32h 16m

$1,772

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 3/26

12:36 pm-9:20 am

1 stop27h 14m

Adelaide

Thu 4/2

7:40 am-6:35 pm

2 stops28h 25m

$1,818

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 5/11

4:30 pm-1:40 pm

2 stops28h 40m

Adelaide

Thu 5/14

6:00 am-6:30 pm

3 stops29h 00m

$1,870

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 3/6

8:45 am-7:25 am

2 stops52h 10m

$564

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 5/17

8:50 pm-11:05 am

2 stops45h 45m

$725

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/9

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 February.
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 February 11, 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
988 reviews

Overall

7.5

Crew

8.1

Food

7.0

Entertainment

7.2

Comfort

7.5

Boarding

7.7

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
988 reviews
Qantas Airways
7.5
Good
988 reviews

Overall

7.5

Crew

8.1

Food

7.0

Entertainment

7.2

Comfort

7.5

Boarding

7.7

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 $1,402, Qantas Airways can have you in Adelaide from Seattle in 26h 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..

  • 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

Browse thousands of different options on Cheapflights for your next trip

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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 February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,166FlexibilityNo cancel feeOn-time74%

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