How long is the flight from Seattle to Adelaide?

For as low as $1,011, Air Canada can have you in Adelaide from Seattle in 32h. Seattle and Adelaide are separated by a distance of 8332 mi.

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 19% lower than the current average price 3 months from now.

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.

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).

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 Gurufare the most. Gurufare 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.

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.

$663+ Flights from Seattle to Adelaide

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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 December 21, 2025.

Mon 12/222:50 pmSEA - ADL

2 stops30h 25mQantas Airways

Wed 12/247:00 pmADL - SEA

2 stops41h 40mQantas Airways

Deal found 12/18

$2,381

Mon 12/224:05 pmSEA - ADL

1 stop30h 30mMultiple Airlines

Wed 12/248:25 pmADL - SEA

2 stops33h 45mMultiple Airlines

Deal found 12/18

$3,005

Mon 12/224:05 pmSEA - ADL

1 stop30h 30mQatar Airways

Wed 12/2410:00 pmADL - SEA

1 stop32h 10mQatar Airways

Deal found 12/18

$3,080

Best flights from Seattle to Adelaide
Discover carefully curated flight deals from Seattle to Adelaide that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 21, 2025.

Wed 2/48:00 pmSEA - ADL

2 stops28h 20mMultiple Airlines

Wed 2/116:10 amADL - SEA

2 stops26h 51mMultiple Airlines

Deal found 12/20

$964

Tue 2/38:00 pmSEA - ADL

2 stops32h 00mAir Canada

Tue 2/106:10 amADL - SEA

2 stops21h 35mAir Canada

Deal found 12/20

$1,011

Mon 2/25:10 pmSEA - ADL

1 stop21h 50mUnited Airlines

Mon 2/92:55 pmADL - SEA

1 stop24h 47mUnited Airlines

Deal found 12/19

$1,113

Mon 2/28:00 pmSEA - ADL

2 stops24h 55mMultiple Airlines

Mon 2/96:00 amADL - SEA

2 stops21h 45mMultiple Airlines

Deal found 12/19

$1,005

Sat 2/218:00 pmSEA - ADL

2 stops28h 40mAir Canada

Tue 2/247:55 pmADL - SEA

2 stops37h 06mAir Canada

Deal found 12/18

$1,088

Wed 2/47:30 pmSEA - ADL

2 stops23h 00mUnited Airlines

Wed 2/112:55 pmADL - SEA

1 stop24h 47mUnited Airlines

Deal found 12/20

$1,372

Sat 5/95:06 pmSEA - ADL

2 stops25h 59mMultiple Airlines

Sat 5/1612:35 pmADL - SEA

2 stops26h 07mMultiple Airlines

Deal found 12/20

$1,257

Tue 2/39:25 amSEA - ADL

2 stops34h 15mUnited Airlines

Tue 2/107:15 amADL - SEA

3 stops32h 27mUnited Airlines

Deal found 12/20

$1,379

Last-minute flights from Seattle to Adelaide
Discover last-minute flight deals from Seattle to Adelaide. Data last updated December 21, 2025 and is based on user searches.

Mon 12/222:50 pmSEA - ADL

2 stops30h 25mQantas Airways

Wed 12/247:00 pmADL - SEA

2 stops41h 40mQantas Airways

Deal found 12/18

$2,381

Thu 1/87:30 pmSEA - ADL

1 stop19h 30mUnited Airlines

Mon 1/122:55 pmADL - SEA

1 stop43h 19mUnited Airlines

Deal found 12/20

$2,545

Sun 1/113:45 pmSEA - ADL

2 stops46h 00mMultiple Airlines

Mon 1/1912:35 pmADL - SEA

2 stops28h 12mMultiple Airlines

Deal found 12/20

$1,479

Sun 1/113:30 pmSEA - ADL

2 stops47h 30mUnited Airlines

Mon 1/192:55 pmADL - SEA

3 stops43h 36mUnited Airlines

Deal found 12/20

$1,989

Sun 1/114:05 pmSEA - ADL

1 stop34h 15mEmirates

Mon 1/1910:40 pmADL - SEA

1 stop32h 25mEmirates

Deal found 12/20

$2,482

Tue 1/133:45 pmSEA - ADL

2 stops24h 40mQantas Airways

Sat 2/287:50 amADL - SEA

2 stops29h 37mQantas Airways

Deal found 12/20

$1,635

Tue 1/138:00 pmSEA - ADL

2 stops32h 00mAir Canada

Sat 2/286:00 amADL - SEA

2 stops27h 01mAir Canada

Deal found 12/19

$1,932

Tue 1/135:59 pmSEA - ADL

3 stops42h 36mCathay Pacific

Sat 2/2812:00 pmADL - SEA

3 stops44h 29mCathay Pacific

Deal found 12/19

$2,045

Tue 1/138:15 pmSEA - ADL

2 stops43h 45mMultiple Airlines

Sat 2/2812:00 pmADL - SEA

3 stops44h 29mMultiple Airlines

Deal found 12/19

$2,183

Tue 1/135:10 pmSEA - ADL

2 stops26h 30mUnited Airlines

Sat 2/282:55 pmADL - SEA

1 stop24h 36mUnited Airlines

Deal found 12/19

$2,197

Tue 1/134:05 pmSEA - ADL

1 stop34h 15mEmirates

Sat 2/2810:40 pmADL - SEA

1 stop32h 25mEmirates

Deal found 12/19

$2,532

One-way flights from Seattle to Adelaide
Search for one-way flight options from Seattle to Adelaide. Find affordable one-way fares based on user searches. Data last updated December 21, 2025.

Fri 5/157:55 pmSEA - ADL

3 stops43h 30mMultiple Airlines

Deal found 12/19

$663

Tue 1/203:57 pmSEA - ADL

2 stops25h 48mMultiple Airlines

Deal found 12/19

$697

Sun 5/177:08 pmSEA - ADL

2 stops23h 27mQantas Airways

Deal found 12/18

$715

Sun 5/174:30 pmSEA - ADL

2 stops52h 55mANA

Deal found 12/20

$716

Thu 1/87:00 amSEA - ADL

2 stops36h 15mMultiple Airlines

Deal found 12/19

$721

Sun 5/176:59 pmSEA - ADL

3 stops26h 06mMultiple Airlines

Deal found 12/18

$805

Fri 1/96:00 amSEA - ADL

2 stops41h 15mQantas Airways

Deal found 12/19

$853

Fri 1/93:45 pmSEA - ADL

3 stops55h 30mMultiple Airlines

Deal found 12/19

$856

Tue 1/206:20 amSEA - ADL

3 stops39h 35mCathay Pacific

Deal found 12/20

$1,015

Find flight deals from Seattle to Adelaide

Most accurate provider	FlightHub 3 stars
Most trusted provider	Gurufare 3 stars
Round-trip from	$964 (Air Canada)
One-way from	$663 (Kiwi.com)
Popular in	January
Cheapest in	September
Average price	$1,274

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

One-way flight from Seattle/Tacoma Intl to Adelaide

Search Deals

Highest demand for flights based on searches. 14% potential increase in price ($234 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 7% potential price decrease ($90 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 2/4

8:00 pm-6:50 pm

2 stops28h 20m

Adelaide

Wed 2/11

6:10 am-2:31 pm

2 stops26h 51m

$964

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/2

8:00 pm-3:25 pm

2 stops24h 55m

Adelaide

Mon 2/9

6:00 am-9:15 am

2 stops21h 45m

$1,005

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 2/3

8:00 pm-10:30 pm

2 stops32h 00m

Adelaide

Tue 2/10

6:10 am-9:15 am

2 stops21h 35m

$1,011

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 2/21

8:00 pm-7:10 pm

2 stops28h 40m

Adelaide

Tue 2/24

7:55 pm-2:31 pm

2 stops37h 06m

$1,088

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/2

5:10 pm-9:30 am

1 stop21h 50m

Adelaide

Mon 2/9

2:55 pm-9:12 pm

1 stop24h 47m

$1,113

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 5/9

5:06 pm-11:35 am

2 stops25h 59m

Adelaide

Sat 5/16

12:35 pm-10:12 pm

2 stops26h 07m

$1,257

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 2/4

7:30 pm-1:00 pm

2 stops23h 00m

Adelaide

Wed 2/11

2:55 pm-9:12 pm

1 stop24h 47m

$1,372

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 2/3

9:25 am-2:10 pm

2 stops34h 15m

Adelaide

Tue 2/10

7:15 am-9:12 pm

3 stops32h 27m

$1,379

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 5/15

7:55 pm-7:55 am

3 stops43h 30m

$663

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 1/20

3:57 pm-12:15 pm

2 stops25h 48m

$697

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/19

Showing 1-10 of 15 results

Compare providers for flights from Seattle to Adelaide

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Adelaide in December.

Provider	Price Accuracy	Trust Score*
Gurufare	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star

*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 Gurufare the most. Gurufare 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 time of day to fly from SEA to ADL?

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 25% on your trip compared to booking a flight in the afternoon.

Reviews of airlines servicing Adelaide

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

948 reviews

Reviews

1 / 20

10.0

Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.

Qantas Airways

7.5

Good

948 reviews

Qantas Airways

7.5

Good

948 reviews

Reviews

1 / 20

10.0

Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.

Related info for your journey

How long is the flight from Seattle to Adelaide?
For as low as $1,011, Air Canada can have you in Adelaide from Seattle in 32h. Seattle and Adelaide are separated by a distance of 8332 mi.
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 19% 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.

See more FAQs

Glenelg

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Top airline flying from Seattle to Adelaide

Airline	Cheapest	Average	Flexibility	On-time
Qantas Airways	Cheapest$1,088	Average$1,166	FlexibilityNo cancel fee	On-time74%

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$663+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Seattle to Adelaide with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Seattle to Adelaide

Cheapest flights from Seattle to AdelaideExplore 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 December 21, 2025.

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 December 21, 2025.

Find flight deals from Seattle to Adelaide

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Adelaide that are best for you.

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 December.

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.

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?

Reviews of airlines servicing Adelaide

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.

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?

What is the cheapest airline to fly from Seattle to Adelaide round-trip?

Can I find deals for flights from Seattle to Adelaide that include hotel bookings?

How can I find direct flights from Seattle to Adelaide?

Can I find deals for business class flights from Seattle to Adelaide?

Traveling to a place near Adelaide?

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.

Other flights to Adelaide

Explore flights to Adelaide departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on December 21, 2025.

Top airline flying from Seattle to Adelaide

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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 December 21, 2025.