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$718+ 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 6/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
May 5 — May 121
Mon 5/5
Mon 5/12
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 April 30, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,326
(Jetabroad)

One-way from

$718
(United Airlines)

Popular in

January

Cheapest in

March

Average price

$1,570
Provider with most accurate pricing for Seattle/Tacoma Intl-Adelaide flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Adelaide flights.
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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 ($334 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($63 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 30, 2025.

This Jetabroad deal was found by Cheapflights users on 4/29. 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.
Thu 6/56:59 pmSEA - ADL
2 stops24h 06mMultiple Airlines
Thu 6/1212:35 pmADL - SEA
2 stops21h 49mMultiple Airlines
Deal found 4/29$1,326
This Expedia deal was found by Cheapflights users on 4/29. 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.
Sat 5/38:15 amSEA - ADL
2 stops44h 15mHawaiian Airlines
Wed 5/148:00 pmADL - SEA
2 stops53h 05mHawaiian Airlines
Deal found 4/29$1,377
This Jetabroad deal was found by Cheapflights users on 4/29. 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.
Sat 10/43:35 pmSEA - ADL
2 stops27h 00mQantas Airways
Sat 10/182:55 pmADL - SEA
2 stops22h 30mQantas Airways
Deal found 4/29$1,406
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Fri 6/135:14 pmSEA - ADL
2 stops24h 21mUnited Airlines
Fri 6/206:05 amADL - SEA
3 stops31h 33mUnited Airlines
Deal found 4/29$1,495
This KAYAK deal was found by Cheapflights users on 4/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/44:30 pmSEA - ADL
1 stop30h 50mQatar Airways
Sat 10/186:20 pmADL - SEA
2 stops35h 40mQatar Airways
Deal found 4/29$1,578
This BYOjet deal was found by Cheapflights users on 4/29. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/55:14 pmSEA - ADL
3 stops27h 46mAir New Zealand
Thu 6/128:10 pmADL - SEA
2 stops41h 31mAir New Zealand
Deal found 4/29$1,765
This StudentUniverse deal was found by Cheapflights users on 4/29. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/410:15 amSEA - ADL
1 stop37h 35mSingapore Airlines
Sat 10/186:35 pmADL - SEA
1 stop31h 40mSingapore Airlines
Deal found 4/29$1,856
This Air Canada deal was found by Cheapflights users on 4/29. 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.
Tue 5/62:55 pmSEA - ADL
2 stops28h 25mAir Canada
Sun 5/189:20 pmADL - SEA
2 stops28h 28mAir Canada
Deal found 4/29$9,666

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 April 30, 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

Thu 6/5

6:59 pm-11:35 am

2 stops24h 06m

Adelaide

Thu 6/12

12:35 pm-5:54 pm

2 stops21h 49m

$1,326

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 10/4

3:35 pm-12:05 pm

2 stops27h 00m

Adelaide

Sat 10/18

2:55 pm-7:55 pm

2 stops22h 30m

$1,406

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 6/13

5:14 pm-10:05 am

2 stops24h 21m

Adelaide

Fri 6/20

6:05 am-9:08 pm

3 stops31h 33m

$1,495

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 10/4

4:30 pm-4:50 pm

1 stop30h 50m

Adelaide

Sat 10/18

6:20 pm-12:30 pm

2 stops35h 40m

$1,578

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 6/5

5:14 pm-1:30 pm

3 stops27h 46m

Adelaide

Thu 6/12

8:10 pm-9:11 pm

2 stops41h 31m

$1,765

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 10/4

10:15 am-5:20 pm

1 stop37h 35m

Adelaide

Sat 10/18

6:35 pm-8:45 am

1 stop31h 40m

$1,856

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 6/13

5:14 pm-10:05 am

2 stops24h 21m

$718

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 5/9

9:28 pm-11:35 am

2 stops45h 37m

$885

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 5/9

4:30 pm-3:50 pm

1 stop30h 50m

$1,280

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 5/8

1:10 am-10:20 am

2 stops40h 40m

$2,542

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

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 April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Adelaide flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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.

Cheapflights Insights

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

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.

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 April 30, 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.

Rainfall in Adelaide by month

Plan your trip to Adelaide by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Adelaide ranges from 0.4 - 2.4 inches per month. July is typically the wettest month, when rainfall can reach 2.4 in. January is typically the driest time to visit Adelaide when rainfall is around 0.4 in.

Temperature in Adelaide by month

Plan your trip to Adelaide by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Adelaide, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 51.8 F).

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 April 30, 2025.
Singapore Airlines
8.1
Very good
1,292 reviews

Food

7.7

Comfort

7.9

Boarding

8.2

Entertainment

8.0

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
1,292 reviews
Singapore Airlines
8.1
Very good
1,292 reviews

Food

7.7

Comfort

7.9

Boarding

8.2

Entertainment

8.0

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.
Air New Zealand
8.0
Very good
471 reviews
Singapore Airlines
8.1
Very good
1,292 reviews

Food

7.7

Comfort

7.9

Boarding

8.2

Entertainment

8.0

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
829 reviews
Singapore Airlines
8.1
Very good
1,292 reviews

Food

7.7

Comfort

7.9

Boarding

8.2

Entertainment

8.0

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
3,563 reviews
Singapore Airlines
8.1
Very good
1,292 reviews

Food

7.7

Comfort

7.9

Boarding

8.2

Entertainment

8.0

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
8,696 reviews
Singapore Airlines
8.1
Very good
1,292 reviews

Food

7.7

Comfort

7.9

Boarding

8.2

Entertainment

8.0

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 $1,406, 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 5% 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 United Airlines ($718), Qatar Airways ($1,280), and American Airlines ($2,542).

  • 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 Seattle?

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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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,211Average$1,522FlexibilityNo cancel feeOn-time69%

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