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$1,036+ Cheap flights from Seattle (SEA) to Adelaide (ADL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
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 August 18, 2025.

Round-trip from

$1,036
(Air Canada)

Popular in

January

Cheapest in

November

Average price

$1,246
From Seattle/Tacoma Intl to Adelaide
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Highest demand for flights based on searches. 17% potential increase in price ($305 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($73 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 18, 2025.

This Air Canada deal was found by Cheapflights users on 8/17. 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 10/318:00 pmSEA - ADL
2 stops25h 55mMultiple Airlines
Fri 11/146:10 amADL - SEA
2 stops31h 36mMultiple Airlines
Deal found 8/17$1,036
This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/122:59 pmSEA - ADL
2 stops25h 26mQantas Airways
Mon 11/2412:35 pmADL - SEA
2 stops23h 58mQantas Airways
Deal found 8/16$1,044
This Air Canada deal was found by Cheapflights users on 8/16. 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 11/98:00 pmSEA - ADL
2 stops27h 40mAir Canada
Fri 11/216:10 amADL - SEA
2 stops34h 26mAir Canada
Deal found 8/16$1,063
This Expedia deal was found by Cheapflights users on 8/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1512:00 pmSEA - ADL
2 stops30h 50mMultiple Airlines
Mon 9/226:25 amADL - SEA
2 stops30h 29mMultiple Airlines
Deal found 8/17$1,065
This Air Canada deal was found by Cheapflights users on 8/16. 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 11/98:00 pmSEA - ADL
2 stops25h 50mAir Canada
Sat 11/226:55 pmADL - SEA
2 stops33h 06mAir Canada
Deal found 8/16$1,068
This Qantas Airways deal was found by Cheapflights users on 8/16. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/105:30 pmSEA - ADL
2 stops28h 25mQantas Airways
Tue 11/259:00 amADL - SEA
2 stops27h 33mQantas Airways
Deal found 8/16$1,121
This Qantas Airways deal was found by Cheapflights users on 8/16. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/124:30 pmSEA - ADL
2 stops23h 55mQantas Airways
Thu 11/276:25 amADL - SEA
2 stops30h 49mQantas Airways
Deal found 8/16$1,122
This Qantas Airways deal was found by Cheapflights users on 8/16. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:05 amSEA - ADL
2 stops34h 20mQantas Airways
Sun 11/237:00 pmADL - SEA
2 stops41h 33mQantas Airways
Deal found 8/16$1,129
This Qantas Airways deal was found by Cheapflights users on 8/16. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:05 amSEA - ADL
2 stops34h 20mQantas Airways
Wed 11/2612:35 pmADL - SEA
2 stops23h 58mQantas Airways
Deal found 8/16$1,130
This Air Canada deal was found by Cheapflights users on 8/16. 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 11/148:00 pmSEA - ADL
2 stops25h 40mAir Canada
Thu 11/276:10 amADL - SEA
2 stops21h 51mAir Canada
Deal found 8/16$1,163
This Air Canada deal was found by Cheapflights users on 8/16. 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 11/143:40 pmSEA - ADL
2 stops30h 00mAir Canada
Wed 11/266:00 amADL - SEA
2 stops34h 36mAir Canada
Deal found 8/16$1,168
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Mon 11/1012:30 pmSEA - ADL
3 stops31h 10mUnited Airlines
Sun 11/237:15 amADL - SEA
2 stops23h 33mUnited Airlines
Deal found 8/16$1,259

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 August 18, 2025.
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 11/2

8:00 pm-6:00 pm

2 stops27h 30m

Adelaide

Sun 11/9

6:10 am-7:16 pm

2 stops31h 36m

$1,036

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 10/31

8:00 pm-3:25 pm

2 stops25h 55m

Adelaide

Fri 11/14

6:10 am-7:16 pm

2 stops31h 36m

$1,036

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 11/12

2:59 pm-10:55 am

2 stops25h 26m

Adelaide

Mon 11/24

12:35 pm-6:03 pm

2 stops23h 58m

$1,044

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 11/11

8:00 pm-10:30 pm

2 stops32h 00m

Adelaide

Fri 11/21

6:10 am-7:16 pm

2 stops31h 36m

$1,063

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 11/14

8:00 pm-10:30 pm

2 stops32h 00m

Adelaide

Fri 11/21

6:10 am-9:31 am

2 stops21h 51m

$1,063

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 11/13

3:40 pm-10:30 pm

2 stops36h 20m

Adelaide

Fri 11/21

6:10 am-9:31 am

2 stops21h 51m

$1,063

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 11/15

8:00 pm-10:30 pm

2 stops32h 00m

Adelaide

Tue 11/25

6:10 am-2:26 pm

2 stops26h 46m

$1,063

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 11/14

3:40 pm-10:30 pm

2 stops36h 20m

Adelaide

Tue 11/25

6:10 am-2:26 pm

2 stops26h 46m

$1,063

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 11/12

10:05 am-10:30 pm

2 stops41h 55m

Adelaide

Tue 11/25

6:10 am-9:31 am

2 stops21h 51m

$1,063

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 11/15

10:05 am-6:10 pm

2 stops37h 35m

Adelaide

Fri 11/21

6:10 am-10:06 pm

2 stops34h 26m

$1,063

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 12 results
1
2

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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Adelaide

What is the cheapest time of day to fly from SEA to ADL?

Find hourly flight availability from Seattle to Adelaide. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 18, 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Adelaide in the morning. If you’re flexible enough to do this you can expect to save up to 26% on your trip compared to booking a flight at noon.

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 August 18, 2025.
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
896 reviews

Boarding

7.7

Food

6.9

Crew

8.2

Overall

7.5

Comfort

7.4

Entertainment

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

MEL - SYD

Flight cancelled 2hours before take off after checking in. Booked by airline on flight 6 hours later. No compensation or vouchers till we asked just before the flight took off.
Qantas Airways
7.5
Good
896 reviews
Qantas Airways
7.5
Good
896 reviews

Boarding

7.7

Food

6.9

Crew

8.2

Overall

7.5

Comfort

7.4

Entertainment

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

MEL - SYD

Flight cancelled 2hours before take off after checking in. Booked by airline on flight 6 hours later. No compensation or vouchers till we asked just before the flight took off.

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 $1,044, Qantas Airways can have you in Adelaide from Seattle in 25h 26m. 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.. This flight start at 24% lower than the current average price 3 months from now.

  • 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.

  • What is the cheapest month to book a flight from Seattle to Adelaide?

    Currently, August is the cheapest month in which you can book a flight from Seattle to Adelaide (average of $1,214). Flying from Seattle to Adelaide in December is currently the most expensive (average of $2,057). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Adelaide?

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

Browse thousands of different options on Cheapflights for your next trip

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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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,166FlexibilityNo cancel feeOn-time74%

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