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$487+ Cheap flights from Seattle (SEA) to Adelaide (ADL)

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 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
jul. 8 — jul. 151
mar. 7/8
mar. 7/15
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 julio 3, 2025.

Round-trip from

$1,042
(FlightHub)

One-way from

$487
(FlightHub)

Popular in

January

Cheapest in

March

Average price

$1,210
From Seattle/Tacoma Intl to Adelaide
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One-way flight from Seattle/Tacoma Intl to Adelaide
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Highest demand for flights based on searches. 18% potential increase in price ($335 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($70 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 3, 2025.

This FlightHub deal was found by Cheapflights users on 7/2. 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.
mié. 7/305:15 pmSEA - ADL
2 stops26h 20mQantas Airways
mié. 8/612:45 pmADL - SEA
2 stops23h 45mQantas Airways
Deal found 7/2$1,042
This Trip.com deal was found by Cheapflights users on 7/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/166:55 pmSEA - ADL
2 stops33h 35mMultiple Airlines
sáb. 8/234:30 pmADL - SEA
2 stops45h 36mMultiple Airlines
Deal found 7/3$1,100
This United Airlines deal was found by Cheapflights users on 7/2. 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. 7/48:57 amSEA - ADL
3 stops33h 28mUnited Airlines
vie. 8/156:05 amADL - SEA
3 stops31h 22mUnited Airlines
Deal found 7/2$1,266
This FlightHub deal was found by Cheapflights users on 7/2. 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.
sáb. 7/56:00 pmSEA - ADL
2 stops25h 05mFiji Airways
jue. 7/3112:35 pmADL - SEA
2 stops25h 01mFiji Airways
Deal found 7/2$1,428

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 julio 3, 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

mié. 7/30

5:15 pm-12:05 pm

2 stops26h 20m

Adelaide

mié. 8/6

12:45 pm-8:00 pm

2 stops23h 45m

$1,042

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

sáb. 8/16

6:55 pm-9:00 pm

2 stops33h 35m

Adelaide

sáb. 8/23

4:30 pm-9:36 pm

2 stops45h 36m

$1,100

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

mié. 7/9

5:14 pm-10:55 am

2 stops25h 11m

Adelaide

dom. 8/17

6:05 am-8:57 pm

3 stops31h 22m

$1,266

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

lun. 7/7

6:25 pm-11:35 am

3 stops48h 40m

Adelaide

lun. 8/25

12:35 pm-9:33 pm

2 stops25h 28m

$2,080

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

mié. 7/30

6:09 pm-12:05 pm

2 stops25h 26m

$487

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

dom. 8/17

2:32 pm-9:25 am

2 stops26h 23m

$557

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

dom. 8/17

6:15 pm-11:35 am

3 stops24h 50m

$599

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

vie. 8/15

10:15 am-4:20 pm

1 stop37h 35m

$1,326

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

mié. 7/30

4:30 pm-3:50 pm

1 stop30h 50m

$1,357

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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 julio 3, 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 julio 3, 2025.
Read through reviews of airlines operating flights from Seattle to Adelaide, such as Singapore Airlines, Hawaiian Airlines, and Qantas Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very good
1,320 reviews

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Singapore Airlines
8.1
Very good
1,320 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Hawaiian Airlines
7.8
Good
2,545 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Qantas Airways
7.5
Good
868 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Qatar Airways
7.4
Good
3,594 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
United Airlines
7.4
Good
8,861 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

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.

  • What are the cheapest airlines flying from Seattle to Adelaide round-trip?

    Qantas Airways, at $1,042, was found to be the cheapest airline from Seattle to Adelaide.Alternate airlines to your destination round-trip include United Airlines and Qatar Airways. These flights start at 29% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Seattle to Adelaide one-way?

    The cheapest airlines for a one-way flight from Seattle to Adelaide are Qantas Airways ($487), American Airlines ($557), and Singapore Airlines ($1,326).

  • 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

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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 julio 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,236FlexibilityNo cancel feeOn-time74%

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