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Cheap flights from Seattle to Adelaide from $996

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 17/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
30 May — 6 Jun1
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 30 April 2026.

Tue 12/513:21
SEA
-
ADL
2 stops29h 14m
United Airlines
Sun 24/506:05
ADL
-
SEA
3 stops31h 34m
United Airlines
Deal found 28/4$1,790
Sat 4/713:38
SEA
-
ADL
2 stops27h 17m
Multiple Airlines
Sat 18/717:35
ADL
-
SEA
2 stops44h 53m
Multiple Airlines
Deal found 27/4$1,851
Thu 7/513:21
SEA
-
ADL
2 stops29h 14m
United Airlines
Wed 20/506:05
ADL
-
SEA
2 stops28h 57m
United Airlines
Deal found 26/4$1,860
Sat 9/517:06
SEA
-
ADL
2 stops25h 39m
Qantas Airways
Sat 16/514:25
ADL
-
SEA
2 stops49h 03m
Qantas Airways
Deal found 30/4$1,889
Sat 9/517:45
SEA
-
ADL
2 stops24h 40m
United Airlines
Sat 16/506:05
ADL
-
SEA
2 stops25h 01m
United Airlines
Deal found 28/4$1,939
Sun 14/606:03
SEA
-
ADL
2 stops36h 42m
Multiple Airlines
Sun 21/617:15
ADL
-
SEA
2 stops45h 04m
Multiple Airlines
Deal found 30/4$1,998
Sat 13/608:00
SEA
-
ADL
2 stops31h 40m
Multiple Airlines
Sat 20/611:50
ADL
-
SEA
2 stops28h 39m
Multiple Airlines
Deal found 29/4$2,166
Mon 6/708:00
SEA
-
ADL
2 stops22h 05m
Multiple Airlines
Fri 24/712:40
ADL
-
SEA
2 stops27h 49m
Multiple Airlines
Deal found 29/4$2,167
Sat 4/716:25
SEA
-
ADL
1 stop30h 35m
Qatar Airways
Sat 18/718:20
ADL
-
SEA
2 stops34h 35m
Qatar Airways
Deal found 27/4$2,426

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 30 April 2026.

Round-trip from

$1,790

One-way from

$996
United Airlines
  • United Airlines
  • 12/5-24/5
  • 5 total stops
  • 60h 48m total
  • Seattle to Adelaide
Search Deals
United Airlines
  • United Airlines
  • 17/5
  • 2 total stops
  • 25h 15m 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 30 April 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

Fri 15/5

18:58-11:05

2 stops23h 37m

Adelaide

Wed 27/5

06:05-21:10

3 stops31h 35m

$1,860

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 13/6

08:00-08:10

2 stops31h 40m

Adelaide

Sat 20/6

11:50-23:59

2 stops28h 39m

$2,166
Fastest return journey

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 6/7

08:00-22:35

2 stops22h 05m

Adelaide

Fri 24/7

12:40-23:59

2 stops27h 49m

$2,167

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 12/5

17:15-20:05

1 stop34h 20m

Adelaide

Sun 24/5

22:00-13:25

1 stop31h 55m

$3,663

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 6/7

17:15-20:05

1 stop34h 20m

Adelaide

Fri 24/7

22:00-13:25

1 stop31h 55m

$4,261
Cheapest one-way

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 17/5

17:25-11:10

2 stops25h 15m

$996
Fastest single journey

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 24/10

17:55-12:15

2 stops24h 50m

$1,023

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 24/10

08:40-13:55

3 stops35h 45m

$1,301

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 17/5

19:16-11:15

3 stops47h 29m

$1,935

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 17/5

17:15-20:05

1 stop34h 20m

$2,458

Flights are sorted by cheapest return flights first.

Deals found on 29/4

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 23h 37m. 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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How does Cheapflights help users find flights from Seattle to Adelaide?

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Why should you use Cheapflights to find cheap flight tickets from Seattle to Adelaide?

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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