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Cheap flights from Seattle to Adelaide from $1,660

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
28 Aug — 4 Sep1
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 29 July 2026.

Tue 8/915:00
SEA
-
ADL
2 stops28h 20m
Air Canada
Sun 13/921:20
ADL
-
SEA
2 stops29h 15m
Air Canada
Deal found 26/7$1,660
Sun 6/915:00
SEA
-
ADL
2 stops34h 40m
Air Canada
Sun 13/921:20
ADL
-
SEA
2 stops29h 15m
Air Canada
Deal found 26/7$1,663
Tue 8/915:00
SEA
-
ADL
2 stops28h 20m
Air Canada
Mon 14/919:00
ADL
-
SEA
2 stops35h 52m
Air Canada
Deal found 26/7$1,667
Wed 9/916:59
SEA
-
ADL
2 stops27h 21m
Qantas Airways
Wed 16/906:35
ADL
-
SEA
2 stops32h 35m
Qantas Airways
Deal found 26/7$1,671
Mon 7/915:00
SEA
-
ADL
2 stops29h 20m
Multiple Airlines
Mon 14/920:00
ADL
-
SEA
2 stops34h 52m
Multiple Airlines
Deal found 26/7$1,677
Sun 6/905:50
SEA
-
ADL
2 stops43h 50m
Air Canada
Tue 15/916:30
ADL
-
SEA
2 stops42h 32m
Air Canada
Deal found 26/7$1,730
Wed 9/917:59
SEA
-
ADL
2 stops24h 36m
Multiple Airlines
Wed 16/913:25
ADL
-
SEA
2 stops22h 44m
Multiple Airlines
Deal found 26/7$1,742
Sun 2/810:29
SEA
-
ADL
2 stops34h 46m
United Airlines
Sun 16/806:05
ADL
-
SEA
3 stops31h 40m
United Airlines
Deal found 25/7$1,746
Sun 6/909:05
SEA
-
ADL
2 stops33h 20m
United Airlines
Wed 16/906:05
ADL
-
SEA
2 stops21h 49m
United Airlines
Deal found 26/7$1,747
Mon 7/919:35
SEA
-
ADL
2 stops22h 50m
United Airlines
Mon 14/920:00
ADL
-
SEA
3 stops42h 01m
United Airlines
Deal found 25/7$1,749
Wed 9/913:16
SEA
-
ADL
2 stops29h 19m
United Airlines
Sun 13/920:00
ADL
-
SEA
2 stops42h 21m
United Airlines
Deal found 26/7$1,759
Mon 7/919:35
SEA
-
ADL
2 stops22h 50m
United Airlines
Sun 13/920:00
ADL
-
SEA
2 stops42h 21m
United Airlines
Deal found 26/7$1,760

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 29 July 2026.

Round-trip from

$1,660
Air Canada
  • Air Canada
  • 8/9-13/9
  • 4 total stops
  • 57h 35m 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 29 July 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

Sat 5/12

19:32-10:55

2 stops44h 53m

Adelaide

Wed 6/1

14:55-09:59

2 stops37h 34m

$1,832
Fastest return journey

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 21/8

16:25-15:00

1 stop30h 05m

Adelaide

Sat 5/9

22:00-12:45

1 stop31h 15m

$1,876

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/9

16:25-10:05

2 stops49h 10m

Adelaide

Mon 14/9

22:00-12:45

1 stop31h 15m

$1,915

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 21/8

21:25-09:25

3 stops43h 30m

Adelaide

Sat 5/9

06:00-10:56

3 stops45h 26m

$2,768

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 12/12

12:57-18:05

2 stops34h 38m

Adelaide

Sat 22/5

14:00-14:42

2 stops41h 12m

$3,892

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/9

18:10-07:00

3 stops44h 20m

Adelaide

Mon 14/9

09:45-15:40

3 stops46h 25m

$4,171

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 5/12

07:20-17:20

3 stops39h 30m

Adelaide

Wed 6/1

10:15-19:23

3 stops51h 38m

$4,404

Flights are sorted by cheapest return flights first.

Deals found on 27/7

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 and Qatar Airways can get you from Seattle to Adelaide in just under 30h 05m. Your travel time can differ by up to 14h 48m. There are 13409 km between Seattle and Adelaide. Both multi-stop and direct flights can be found to your destination and back.

  • 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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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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