What is the cheapest airline that flies from Seattle/Tacoma Intl to Adelaide?

Qantas Airways is the most popular carrier operating from Seattle/Tacoma Intl to Adelaide

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Adelaide Airport?

Prices for flights from Seattle/Tacoma Intl Airport to Adelaide Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Adelaide Airport?

As of November 2025, there is 1 operator available to choose from for flights from Seattle/Tacoma Intl Airport to Adelaide Airport.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Adelaide Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Adelaide Airport.

What documentation or ID do you need to fly to Adelaide Airport?

The travel and health documents required for your trip to Adelaide Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Adelaide Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$577 Cheap Flights from Seattle to Adelaide in 2025/26

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3:40 pm - 7:10 pmSEA-ADL

33h 00m2 stops

6:10 am - 9:31 amADL-SEA

21h 51m2 stops

$993Air Canada

Find Deal

Sun, Feb 1 - Sun, Feb 8

10:05 am - 6:50 pmSEA-ADL

38h 15m2 stops

6:10 am - 9:31 amADL-SEA

21h 51m2 stops

$997Multiple Airlines

Find Deal

Sat, Jan 31 - Sun, Feb 8

8:00 pm - 6:50 pmSEA-ADL

28h 20m2 stops

6:10 am - 7:16 pmADL-SEA

31h 36m2 stops

$1,002Multiple Airlines

Find Deal

Sat, Jan 31 - Sun, Feb 8

10:05 am - 6:50 pmSEA-ADL

38h 15m2 stops

6:10 am - 9:31 amADL-SEA

21h 51m2 stops

$1,003Multiple Airlines

Find Deal

Sat, Jan 31 - Sun, Feb 8

10:05 am - 6:50 pmSEA-ADL

38h 15m2 stops

6:10 am - 7:16 pmADL-SEA

31h 36m2 stops

$1,004Multiple Airlines

Find Deal

Sat, Jan 31 - Sun, Feb 8

8:00 pm - 6:50 pmSEA-ADL

28h 20m2 stops

6:10 am - 7:16 pmADL-SEA

31h 36m2 stops

$1,005Multiple Airlines

Find Deal

Sat, Jan 31 - Sun, Feb 8

10:05 am - 6:50 pmSEA-ADL

38h 15m2 stops

6:10 am - 9:31 amADL-SEA

21h 51m2 stops

$1,010Multiple Airlines

Find Deal

Sat, Jan 31 - Sun, Feb 8

8:00 pm - 4:20 pmSEA-ADL

25h 50m2 stops

6:10 am - 10:06 pmADL-SEA

34h 26m2 stops

$1,030Air Canada

Find Deal

Sun, Feb 1 - Tue, Feb 10

8:00 pm - 7:10 pmSEA-ADL

28h 40m2 stops

6:10 am - 7:16 pmADL-SEA

31h 36m2 stops

$1,031Air Canada

Find Deal

Mon, Feb 2 - Sun, Feb 8

5:50 am - 1:55 pmSEA-ADL

37h 35m2 stops

6:10 am - 10:06 pmADL-SEA

34h 26m2 stops

$1,032Air Canada

Find Deal

Sun, Feb 1 - Tue, Feb 10

United Airlines flights from Seattle to Adelaide

Our best United Airlines deals on Seattle to Adelaide flight tickets

United Airlines

Feb 2

SEA9:25 amSeattle/Tacoma Intl

29h 35m

1 stop

ADL9:30 amAdelaide

Feb 9

ADL2:55 pmAdelaide

24h 50m

2 stops

SEA9:15 pmSeattle/Tacoma Intl

$1,109

Find similar

United Airlines

Feb 2

SEA12:35 pmSeattle/Tacoma Intl

26h 25m

1 stop

ADL9:30 amAdelaide

Feb 9

ADL2:55 pmAdelaide

19h 19m

1 stop

SEA3:44 pmSeattle/Tacoma Intl

$1,110

Find similar

United Airlines

Feb 2

SEA8:40 amSeattle/Tacoma Intl

30h 20m

2 stops

ADL9:30 amAdelaide

Feb 9

ADL2:55 pmAdelaide

19h 19m

1 stop

SEA3:44 pmSeattle/Tacoma Intl

$1,115

Find similar

Qantas Airways flights from Seattle to Adelaide

Our best Qantas Airways deals on Seattle to Adelaide flight tickets

Qantas Airways

Jan 13

SEA3:45 pmSeattle/Tacoma Intl

24h 40m

2 stops

ADL10:55 amAdelaide

Feb 28

ADL4:10 pmAdelaide

22h 18m

2 stops

SEA7:58 pmSeattle/Tacoma Intl

$1,128

Find similar

Qantas Airways

Jan 13

SEA3:57 pmSeattle/Tacoma Intl

24h 28m

2 stops

ADL10:55 amAdelaide

Feb 28

ADL4:10 pmAdelaide

22h 18m

2 stops

SEA7:58 pmSeattle/Tacoma Intl

$1,129

Find similar

Qantas Airways

Jan 28

SEA3:57 pmSeattle/Tacoma Intl

27h 13m

2 stops

ADL1:40 pmAdelaide

Feb 11

ADL6:05 amAdelaide

24h 54m

2 stops

SEA12:29 pmSeattle/Tacoma Intl

$1,180

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/1

3:40 pm-7:10 pm

2 stops33h 00m

Adelaide

Sun 2/8

6:10 am-9:31 am

2 stops21h 51m

$993

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 1/31

10:05 am-6:50 pm

2 stops38h 15m

Adelaide

Sun 2/8

6:10 am-9:31 am

2 stops21h 51m

$997

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 1/31

8:00 pm-6:50 pm

2 stops28h 20m

Adelaide

Sun 2/8

6:10 am-7:16 pm

2 stops31h 36m

$1,002

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 1/31

10:05 am-6:50 pm

2 stops38h 15m

Adelaide

Sun 2/8

6:10 am-9:31 am

2 stops21h 51m

$1,003

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 1/31

10:05 am-6:50 pm

2 stops38h 15m

Adelaide

Sun 2/8

6:10 am-7:16 pm

2 stops31h 36m

$1,004

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 1/31

8:00 pm-6:50 pm

2 stops28h 20m

Adelaide

Sun 2/8

6:10 am-7:16 pm

2 stops31h 36m

$1,005

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 1/31

10:05 am-6:50 pm

2 stops38h 15m

Adelaide

Sun 2/8

6:10 am-9:31 am

2 stops21h 51m

$1,010

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/1

8:00 pm-4:20 pm

2 stops25h 50m

Adelaide

Tue 2/10

6:10 am-10:06 pm

2 stops34h 26m

$1,030

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/2

8:00 pm-7:10 pm

2 stops28h 40m

Adelaide

Sun 2/8

6:10 am-7:16 pm

2 stops31h 36m

$1,031

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/1

5:50 am-1:55 pm

2 stops37h 35m

Adelaide

Tue 2/10

6:10 am-10:06 pm

2 stops34h 26m

$1,032

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Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Adelaide

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Adelaide?

The cheapest day to depart on your flight to Adelaide is on a Wednesday when prices can be found for as low as $1,293. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Adelaide is Friday, with ticket prices averaging around $1,570.

What is the cheapest time of day to depart on your flight to Adelaide?

According to our data, the cheapest time of day to fly to Adelaide is in the morning. momondo users have found flights departing from Seattle to Adelaide in the morning for as low as $1,161. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Adelaide are more costly in the afternoon, with an average ticket price of $1,555. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Seattle to Adelaide flights?

You could potentially save up to 62% on your flight if you consider stops on a Seattle to Adelaide flight.

When to book flights from Seattle to Adelaide

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Adelaide according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Seattle to Adelaide (SEA to ADL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Adelaide

Fastest flight time	24h 30m
Direct flights	None

The fastest flight from Seattle to Adelaide takes 24h 30m

There are no direct flights from Seattle to Adelaide. There are no popular flight routes from Seattle to Adelaide.

Search flight deals

How far is Seattle/Tacoma Intl to Adelaide by plane?
A flight from Seattle/Tacoma Intl to Adelaide will travel around 8330.9 mi. Flights usually cover this in 21h 50m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Adelaide Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Adelaide Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Adelaide Airport?
As of November 2025, there is 1 operator available to choose from for flights from Seattle/Tacoma Intl Airport to Adelaide Airport.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Adelaide Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Adelaide Airport.
What documentation or ID do you need to fly to Adelaide Airport?
The travel and health documents required for your trip to Adelaide Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Adelaide Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Seattle to Adelaide?
momondo data reveals that the most frequently booked airline on the route from Seattle to Adelaide is Qantas Airways, representing 100% of all bookings.

Best airlines flying from Seattle to Adelaide

Compare and see reviews for airlines that fly from Seattle to Adelaide with momondo

Airline	Rating	Free Cancellation	Price
Qantas Airways	PriceFrom $1,088	Free Cancellation	Rating 7.5 946 reviews		Search Qantas Airways flights

Glenelg

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Adelaide?

Finding the right flight to Adelaide from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Adelaide quick and easy, saving you time and money.

Can I find flights from Seattle to Adelaide with flexible booking policies on momondo?

Flights from Seattle to Adelaide with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to Adelaide?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Adelaide from Seattle.

I’m not ready to book a flight from Seattle to Adelaide right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Adelaide now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Adelaide and let you know when they change.

An easier way to manage your Adelaide trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from Seattle to Adelaide from $577

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Adelaide departing on 1/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

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Price Alerts

Find the cheapest flights from Seattle to Adelaide

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

United Airlines flights from Seattle to Adelaide

Our best United Airlines deals on Seattle to Adelaide flight tickets

Qantas Airways flights from Seattle to Adelaide

Our best Qantas Airways deals on Seattle to Adelaide flight tickets

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

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How to get the cheapest flight ticket from Seattle to Adelaide

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Adelaide?

What is the cheapest time of day to depart on your flight to Adelaide?

Can stopping save me money on Seattle to Adelaide flights?

You could potentially save up to 62% on your flight if you consider stops on a Seattle to Adelaide flight.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Adelaide?

Qantas Airways is the most popular carrier operating from Seattle/Tacoma Intl to Adelaide

When to book flights from Seattle to Adelaide

Cheap Seattle to Adelaide (SEA to ADL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Adelaide

Fastest flight time

Direct flights

How far is Seattle/Tacoma Intl to Adelaide by plane?

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Adelaide Airport?

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Adelaide Airport?

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Adelaide Airport?

What documentation or ID do you need to fly to Adelaide Airport?

What is the most popular airline from Seattle to Adelaide?

Best airlines flying from Seattle to Adelaide

Compare and see reviews for airlines that fly from Seattle to Adelaide with momondo

Traveling to a place near Adelaide?

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Adelaide?

Can I find flights from Seattle to Adelaide with flexible booking policies on momondo?

How can momondo help me find flights from Seattle to Adelaide?

I’m not ready to book a flight from Seattle to Adelaide right now. Can momondo alert me if prices change?

An easier way to manage your Adelaide trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Australia

Airports servicing South Australia