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$622+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Feb 5 — Feb 121
Thu 2/5
Thu 2/12
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 January 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$1,009
(oojo)

One-way from

$622
(Kiwi.com)
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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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 January 6, 2026.

This Air Canada deal was found by Cheapflights users on 1/3. 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 3/188:00 pmSEA - ADL
2 stops23h 10mMultiple Airlines
Wed 3/256:10 amADL - SEA
2 stops30h 36mMultiple Airlines
Deal found 1/3$1,007
This oojo deal was found by Cheapflights users on 1/5. 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.
Thu 2/194:50 pmSEA - ADL
2 stops24h 55mMultiple Airlines
Thu 2/261:15 pmADL - SEA
2 stops22h 15mMultiple Airlines
Deal found 1/5$1,009
This Air Canada deal was found by Cheapflights users on 1/6. 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 2/208:00 pmSEA - ADL
2 stops23h 35mMultiple Airlines
Fri 2/276:10 amADL - SEA
2 stops31h 36mMultiple Airlines
Deal found 1/6$1,029
This Air Canada deal was found by Cheapflights users on 1/5. 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 2/153:40 pmSEA - ADL
2 stops33h 00mAir Canada
Thu 2/196:00 amADL - SEA
2 stops31h 46mAir Canada
Deal found 1/5$1,090
This oojo deal was found by Cheapflights users on 1/4. 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 pmSEA - ADL
2 stops28h 03mQantas Airways
Fri 7/248:50 amADL - SEA
2 stops30h 35mQantas Airways
Deal found 1/4$1,166
This oojo deal was found by Cheapflights users on 1/4. 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 1/133:45 pmSEA - ADL
2 stops24h 40mQantas Airways
Sat 2/286:05 amADL - SEA
2 stops31h 22mQantas Airways
Deal found 1/4$1,421
This United Airlines deal was found by Cheapflights users on 1/5. 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.
Thu 2/1912:32 pmSEA - ADL
1 stop26h 28mUnited Airlines
Thu 2/267:15 amADL - SEA
2 stops29h 41mUnited Airlines
Deal found 1/5$1,462
This United Airlines deal was found by Cheapflights users on 1/6. 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.
Fri 2/207:00 amSEA - ADL
3 stops33h 25mUnited Airlines
Fri 2/277:15 amADL - SEA
3 stops32h 16mUnited Airlines
Deal found 1/6$1,489

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 January 6, 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

Sun 2/15

3:40 pm-7:10 pm

2 stops33h 00m

Adelaide

Thu 2/19

6:00 am-7:16 pm

2 stops31h 46m

$1,090

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 2/19

12:32 pm-9:30 am

1 stop26h 28m

Adelaide

Thu 2/26

7:15 am-6:26 pm

2 stops29h 41m

$1,462

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 2/20

7:00 am-10:55 am

3 stops33h 25m

Adelaide

Fri 2/27

7:15 am-3:41 pm

2 stops26h 56m

$1,489

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/15

5:20 pm-4:20 pm

2 stops28h 30m

Adelaide

Thu 2/19

7:15 am-9:01 pm

3 stops32h 16m

$1,875

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 3/18

1:30 pm-5:20 pm

2 stops34h 20m

Adelaide

Wed 3/25

10:15 am-7:48 pm

3 stops51h 03m

$2,108

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 1/13

5:59 pm-10:30 am

2 stops46h 01m

Adelaide

Sat 2/28

11:40 am-1:59 pm

3 stops44h 49m

$2,308

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/15

4:05 pm-8:50 pm

1 stop34h 15m

Adelaide

Thu 2/19

10:40 pm-12:35 pm

1 stop32h 25m

$2,481

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 3/16

12:36 pm-8:30 am

1 stop26h 24m

Adelaide

Wed 3/25

1:55 pm-12:59 am

1 stop28h 34m

$5,431

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 5/8

12:50 pm-6:25 am

3 stops49h 05m

$622

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 5/17

9:02 am-11:25 am

2 stops33h 53m

$635

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Showing 1-10 of 13 results
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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 January.
ProviderPrice AccuracyTrust Score*
GurufarePrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 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.

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 January 6, 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
967 reviews

Crew

8.1

Overall

7.5

Comfort

7.5

Boarding

7.7

Food

7.0

Entertainment

7.2

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
967 reviews
Qantas Airways
7.5
Good
967 reviews

Crew

8.1

Overall

7.5

Comfort

7.5

Boarding

7.7

Food

7.0

Entertainment

7.2

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 $1,462, Air Canada can have you in Adelaide from Seattle in 26h 28m. 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 January 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,166FlexibilityNo cancel feeOn-time74%

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