HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Adelaide

$1,296+ 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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Jul 6 — Jul 131
Mon 7/6
Mon 7/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Adelaide with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 June 6, 2026.

This FlightHub deal was found by Cheapflights users on 5/31. 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.
Sun 8/27:20 pm
SEA
-
ADL
2 stops30h 20m
Multiple Airlines
Sun 8/168:00 pm
ADL
-
SEA
2 stops30h 37m
Multiple Airlines
Deal found 5/31$1,296
This Justfly.com deal was found by Cheapflights users on 6/4. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:05 pm
SEA
-
ADL
2 stops32h 10m
Air Canada
Tue 11/176:10 am
ADL
-
SEA
2 stops34h 17m
Air Canada
Deal found 6/4$1,299
This Booking.com deal was found by Cheapflights users on 6/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/119:10 pm
SEA
-
ADL
2 stops32h 55m
Multiple Airlines
Thu 6/1812:40 pm
ADL
-
SEA
2 stops27h 49m
Multiple Airlines
Deal found 6/5$1,305
This Ovago deal was found by Cheapflights users on 5/31. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:20 am
SEA
-
ADL
2 stops22h 45m
Multiple Airlines
Sat 9/52:25 pm
ADL
-
SEA
2 stops25h 58m
Multiple Airlines
Deal found 5/31$1,314
This Alaska Airlines deal was found by Cheapflights users on 6/1. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:20 am
SEA
-
ADL
2 stops22h 45m
Multiple Airlines
Sat 9/511:50 am
ADL
-
SEA
2 stops28h 33m
Multiple Airlines
Deal found 6/1$1,324
This Justfly.com deal was found by Cheapflights users on 6/1. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/138:40 am
SEA
-
ADL
2 stops37h 00m
Air Canada
Sun 11/296:00 am
ADL
-
SEA
2 stops34h 27m
Air Canada
Deal found 6/1$1,338
This Qantas Airways deal was found by Cheapflights users on 6/1. 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.
Tue 8/186:10 pm
SEA
-
ADL
2 stops25h 15m
Qantas Airways
Sat 9/55:10 pm
ADL
-
SEA
2 stops42h 59m
Qantas Airways
Deal found 6/1$1,414
This United Airlines deal was found by Cheapflights users on 6/1. 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.
Sun 8/23:33 pm
SEA
-
ADL
2 stops27h 07m
United Airlines
Sun 8/166:05 am
ADL
-
SEA
3 stops31h 40m
United Airlines
Deal found 6/1$1,433

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 June 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,296
(FlightHub)
Provider with most accurate pricing for Seattle/Tacoma Intl-Adelaide flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Adelaide flights.
Search Deals
From Seattle/Tacoma Intl to Adelaide
Search Deals

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 June 6, 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 round-trip
Quickest round-trip

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 8/20

7:20 am-10:35 pm

2 stops22h 45m

Adelaide

Sat 9/5

6:00 am-11:53 pm

2 stops34h 23m

$1,324

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 8/18

6:10 pm-11:55 am

2 stops25h 15m

Adelaide

Sat 9/5

5:10 pm-7:39 pm

2 stops42h 59m

$1,414

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 7/19

8:45 am-11:10 am

2 stops33h 55m

Adelaide

Sun 7/26

6:05 am-9:10 pm

3 stops31h 35m

$1,441

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

10:29 am-11:05 am

2 stops32h 06m

Adelaide

Fri 7/24

6:05 am-9:10 pm

3 stops31h 35m

$1,480

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 10/31

5:30 pm-12:00 pm

2 stops25h 00m

Adelaide

Tue 11/17

6:00 am-9:12 pm

3 stops33h 42m

$1,559
Cheapest one-way
Quickest one-way

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 6/20

4:25 pm-3:25 pm

1 stop30h 30m

$10,174

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 6/19

1:15 am-7:40 pm

3 stops49h 55m

$12,946

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/3

Sorted by cheapest first

Compare providers for flights from Seattle to Adelaide

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Adelaide in June.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Adelaide flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Adelaide flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Adelaide flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Adelaide flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Adelaide flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

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 June 6, 2026.
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
1,044 reviews

Crew

8.1

Entertainment

7.2

Comfort

7.5

Boarding

7.7

Food

7.0

Overall

7.5

Reviews

1 / 20
2.0
Mediocre

Midhat,Apr 2026

AKL - ADL

Poor as usual. Flight was delayed for more than 4 hours. The Staff was rude. Food was terrible. Very unreliable, unprofessional and unpleasant.
Qantas Airways
7.5
Good
1,044 reviews
Qantas Airways
7.5
Good
1,044 reviews

Crew

8.1

Entertainment

7.2

Comfort

7.5

Boarding

7.7

Food

7.0

Overall

7.5

Reviews

1 / 20
2.0
Mediocre

Midhat,Apr 2026

AKL - ADL

Poor as usual. Flight was delayed for more than 4 hours. The Staff was rude. Food was terrible. Very unreliable, unprofessional and unpleasant.

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 $1,414, Qantas Airways can have you in Adelaide from Seattle in 25h 15m. 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..

  • 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.

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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 June 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,211FlexibilityNo cancel feeOn-time74%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.