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Cheap flights from Seattle to Adelaide from $836

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
16 Apr — 23 Apr1
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 17 March 2026.

Tue 28/415:40
SEA
-
ADL
2 stops27h 05m
Multiple Airlines
Tue 5/518:55
ADL
-
SEA
2 stops31h 25m
Multiple Airlines
Deal found 14/3$1,325
Sun 19/420:00
SEA
-
ADL
2 stops25h 25m
Multiple Airlines
Tue 28/417:15
ADL
-
SEA
2 stops32h 53m
Multiple Airlines
Deal found 13/3$1,409
Thu 30/415:40
SEA
-
ADL
2 stops29h 45m
Air Canada
Thu 7/521:20
ADL
-
SEA
2 stops29h 00m
Air Canada
Deal found 16/3$1,431
Mon 27/419:06
SEA
-
ADL
2 stops26h 04m
Qantas Airways
Mon 4/513:25
ADL
-
SEA
2 stops25h 57m
Qantas Airways
Deal found 12/3$1,585
Fri 24/415:40
SEA
-
ADL
2 stops31h 45m
Air Canada
Tue 28/420:00
ADL
-
SEA
2 stops35h 35m
Air Canada
Deal found 15/3$1,721
Fri 24/408:00
SEA
-
ADL
2 stops22h 05m
Multiple Airlines
Tue 28/412:40
ADL
-
SEA
2 stops28h 43m
Multiple Airlines
Deal found 11/3$1,734
Wed 21/1011:45
SEA
-
ADL
2 stops54h 00m
Cathay Pacific
Sun 1/1112:00
ADL
-
SEA
2 stops39h 40m
Cathay Pacific
Deal found 16/3$1,757
Sun 5/705:40
SEA
-
ADL
2 stops37h 40m
Air Canada
Fri 17/720:00
ADL
-
SEA
2 stops30h 22m
Air Canada
Deal found 14/3$1,811
Mon 6/719:20
SEA
-
ADL
2 stops25h 40m
Multiple Airlines
Fri 24/719:35
ADL
-
SEA
2 stops30h 47m
Multiple Airlines
Deal found 13/3$1,826
Sun 29/315:40
SEA
-
ADL
2 stops49h 05m
Multiple Airlines
Mon 13/420:00
ADL
-
SEA
2 stops39h 50m
Multiple Airlines
Deal found 16/3$1,886

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 17 March 2026.

Round-trip from

$1,325

One-way from

$836
Air Canada
  • Air Canada
  • 28/4-5/5
  • 4 total stops
  • 58h 30m total
  • Seattle to Adelaide
Search Deals
17/5
  • 17/5
  • 2 total stops
  • 23h 11m 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 17 March 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
Fastest return journey

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 24/4

08:00-22:35

2 stops22h 05m

Adelaide

Tue 28/4

12:40-00:53

2 stops28h 43m

$1,734

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 6/7

19:20-13:30

2 stops25h 40m

Adelaide

Fri 24/7

19:35-09:52

2 stops30h 47m

$1,958

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 28/4

19:37-11:05

2 stops22h 58m

Adelaide

Tue 5/5

20:00-21:06

3 stops41h 36m

$2,109

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 6/7

15:00-10:55

2 stops27h 25m

Adelaide

Fri 24/7

06:00-21:59

3 stops32h 29m

$2,237

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 30/4

11:45-11:55

2 stops31h 40m

Adelaide

Thu 7/5

10:10-16:17

3 stops46h 37m

$2,522

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 27/4

20:00-11:50

2 stops23h 20m

Adelaide

Mon 4/5

20:00-21:08

3 stops41h 38m

$2,925

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 29/3

07:40-22:35

2 stops45h 25m

Adelaide

Mon 13/4

08:30-17:01

3 stops49h 01m

$2,937

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 24/4

17:15-20:05

1 stop34h 20m

Adelaide

Tue 28/4

22:00-13:25

1 stop31h 55m

$3,678
Cheapest one-way
Fastest single journey

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 17/5

18:40-11:05

2 stops23h 55m

$848

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 17/5

20:30-08:05

3 stops43h 05m

$1,534

Flights are sorted by cheapest return flights first.

Deals found on 11/3

Showing 1-10 of 12 resultsSorted by cheapest first
1
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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 22h 58m. 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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