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Cheap flights from Seattle to Adelaide from $1,821

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
16 Jul — 23 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Adelaide

Enter your travel dates to find the best prices.

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 16 June 2026.

Sun 2/808:45
SEA
-
ADL
2 stops36h 30m
United Airlines
Sun 16/806:05
ADL
-
SEA
2 stops29h 39m
United Airlines
Deal found 12/6$1,821
Sun 2/815:00
SEA
-
ADL
2 stops27h 40m
Multiple Airlines
Sun 16/820:00
ADL
-
SEA
2 stops30h 37m
Multiple Airlines
Deal found 15/6$1,832
Fri 21/807:20
SEA
-
ADL
2 stops22h 45m
Multiple Airlines
Sat 5/914:25
ADL
-
SEA
2 stops25h 58m
Multiple Airlines
Deal found 12/6$1,856
Mon 6/710:29
SEA
-
ADL
2 stops32h 06m
United Airlines
Fri 24/706:05
ADL
-
SEA
2 stops25h 01m
United Airlines
Deal found 12/6$1,905

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 16 June 2026.

Round-trip from

$1,821
United Airlines
  • United Airlines
  • 2/8-16/8
  • 4 total stops
  • 66h 09m total
  • Seattle to Adelaide
Search Deals

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 16 June 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 return flight

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/8

10:29-11:10

2 stops32h 11m

Adelaide

Sun 16/8

06:05-21:15

3 stops31h 40m

$1,837
Fastest return journey

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 21/8

07:20-22:35

2 stops22h 45m

Adelaide

Sat 5/9

14:25-23:53

2 stops25h 58m

$1,856

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 6/7

10:29-11:05

2 stops32h 06m

Adelaide

Fri 24/7

06:05-14:36

2 stops25h 01m

$1,905

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 30/7

17:20-11:05

2 stops25h 15m

Adelaide

Thu 6/8

20:00-21:10

3 stops41h 40m

$2,172

Flights are sorted by cheapest return flights first.

Deals found on 13/6

Sorted by cheapest first

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 return 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.

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?

    United Airlines can get you from Seattle to Adelaide in just under 32h 11m. Your travel time can differ by up to . There are 13409 km between Seattle and 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 holiday 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

Travelling to a place near Adelaide?

Book flights to Adelaide if you plan to visit one of these locations
Glenelg

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It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Adelaide.

Can Cheapflights find flights from Seattle to Adelaide with no change fees?

Yes, we can. To see specific flights from Seattle to Adelaide with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to Adelaide become cheaper?

Yes, Cheapflights offers price alerts on Seattle to Adelaide flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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