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$1,045+ 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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
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 septiembre 16, 2025.

Round-trip from

$1,045
(Gotogate)

Popular in

January

Cheapest in

September

Average price

$1,088
From Seattle/Tacoma Intl to Adelaide
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($300 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($79 potential savings vs. average RT price).
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Average for round-trip flights in September 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 septiembre 16, 2025.

This Gotogate deal was found by Cheapflights users on 9/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/298:00 pmSEA - ADL
2 stops33h 00mMultiple Airlines
mié. 11/512:45 pmADL - SEA
2 stops39h 16mMultiple Airlines
Deal found 9/14$1,045
This Priceline deal was found by Cheapflights users on 9/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/244:59 pmSEA - ADL
2 stops26h 36mQantas Airways
mié. 10/1512:45 pmADL - SEA
2 stops24h 52mQantas Airways
Deal found 9/15$1,046
This SmartFares deal was found by Cheapflights users on 9/14. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/138:00 amSEA - ADL
2 stops34h 35mMultiple Airlines
vie. 10/318:00 pmADL - SEA
2 stops41h 44mMultiple Airlines
Deal found 9/14$1,078
This Jetabroad deal was found by Cheapflights users on 9/14. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/225:59 pmSEA - ADL
2 stops25h 36mMultiple Airlines
lun. 9/2912:45 pmADL - SEA
2 stops24h 09mMultiple Airlines
Deal found 9/14$1,144
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/288:00 pmSEA - ADL
2 stops26h 50mMultiple Airlines
jue. 11/206:20 pmADL - SEA
3 stops33h 41mMultiple Airlines
Deal found 9/14$1,166
This United Airlines deal was found by Cheapflights users on 9/14. 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.
sáb. 12/139:25 amSEA - ADL
1 stop29h 35mUnited Airlines
lun. 1/52:55 pmADL - SEA
1 stop24h 42mUnited Airlines
Deal found 9/14$1,210
This United Airlines deal was found by Cheapflights users on 9/14. 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.
lun. 10/136:35 amSEA - ADL
2 stops35h 45mUnited Airlines
vie. 10/316:00 amADL - SEA
3 stops32h 43mUnited Airlines
Deal found 9/14$1,283
This United Airlines deal was found by Cheapflights users on 9/14. 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.
mié. 10/2911:59 pmSEA - ADL
2 stops44h 26mUnited Airlines
mié. 11/57:15 amADL - SEA
3 stops32h 06mUnited Airlines
Deal found 9/14$1,369
This Orbitz deal was found by Cheapflights users on 9/13. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/72:40 pmSEA - ADL
2 stops28h 25mMultiple Airlines
sáb. 10/111:35 pmADL - SEA
2 stops22h 37mMultiple Airlines
Deal found 9/13$1,429
This United Airlines deal was found by Cheapflights users on 9/15. 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.
vie. 12/1211:59 pmSEA - ADL
2 stops39h 01mUnited Airlines
lun. 1/52:55 pmADL - SEA
1 stop28h 34mUnited Airlines
Deal found 9/15$1,565

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 septiembre 16, 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

dom. 3/15

3:40 pm-1:55 pm

2 stops28h 45m

Adelaide

jue. 3/19

6:10 am-10:06 pm

2 stops33h 26m

$1,066

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

sáb. 12/13

9:25 am-9:30 am

1 stop29h 35m

Adelaide

lun. 1/5

2:55 pm-9:07 pm

1 stop24h 42m

$1,210

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

dom. 12/14

11:59 pm-9:30 am

2 stops39h 01m

Adelaide

lun. 1/5

2:55 pm-12:59 am

1 stop28h 34m

$1,215

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

lun. 12/15

7:10 am-9:30 am

2 stops31h 50m

Adelaide

lun. 1/5

2:55 pm-9:55 am

2 stops37h 30m

$1,215

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

dom. 3/15

3:00 pm-11:00 am

2 stops26h 30m

Adelaide

jue. 3/19

6:00 am-12:51 pm

3 stops24h 21m

$1,358

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

mié. 10/29

11:59 pm-1:55 pm

2 stops44h 26m

Adelaide

mié. 11/5

7:15 am-8:51 pm

3 stops32h 06m

$1,369

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

vie. 12/12

11:59 pm-9:30 am

2 stops39h 01m

Adelaide

lun. 1/5

2:55 pm-12:59 am

1 stop28h 34m

$1,565

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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 septiembre 16, 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 septiembre 16, 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
907 reviews

Comfort

7.5

Entertainment

7.2

Crew

8.2

Overall

7.5

Boarding

7.7

Food

7.0

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
907 reviews
Qantas Airways
7.5
Good
907 reviews

Comfort

7.5

Entertainment

7.2

Crew

8.2

Overall

7.5

Boarding

7.7

Food

7.0

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 $1,066, Air Canada can have you in Adelaide from Seattle in 28h 45m. 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 21% 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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,164FlexibilityNo cancel feeOn-time74%

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