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 August 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.

$1,036 Cheap Flights from Seattle to Adelaide in 2025

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Find the cheapest flights from Seattle to Adelaide

Round-trip

One-way

Cheap round-trip flights

8:00 pm - 3:25 pmSEA-ADL

25h 55m2 stops

6:10 am - 7:16 pmADL-SEA

31h 36m2 stops

$1,036

Find Deal

Fri, Oct 31 - Fri, Nov 14

12:00 pm - 11:20 amSEA-ADL

30h 50m2 stops

6:25 am - 8:24 pmADL-SEA

30h 29m2 stops

$1,065

Find Deal

Mon, Sep 15 - Mon, Sep 22

5:59 pm - 10:20 amSEA-ADL

23h 51m2 stops

2:55 pm - 8:07 pmADL-SEA

22h 42m2 stops

$1,079Qantas Airways

Find Deal

Thu, Oct 2 - Thu, Oct 9

8:00 pm - 6:10 pmSEA-ADL

27h 40m2 stops

6:10 am - 7:16 pmADL-SEA

31h 36m2 stops

$1,084Air Canada

Find Deal

Sun, Nov 2 - Sun, Nov 9

4:59 pm - 10:20 amSEA-ADL

24h 51m2 stops

2:55 pm - 8:25 pmADL-SEA

23h 00m2 stops

$1,130Qantas Airways

Find Deal

Wed, Oct 1 - Wed, Oct 8

11:59 pm - 10:55 amSEA-ADL

41h 26m2 stops

7:15 am - 8:51 pmADL-SEA

32h 06m3 stops

$1,276United Airlines

Find Deal

Fri, Oct 31 - Fri, Nov 14

4:30 pm - 3:50 pmSEA-ADL

30h 50m1 stop

6:20 pm - 12:45 pmADL-SEA

34h 55m2 stops

$1,487Qatar Airways

Find Deal

Mon, Sep 15 - Mon, Sep 22

1:00 pm - 11:05 amSEA-ADL

29h 35m2 stops

6:00 am - 9:15 pmADL-SEA

32h 45m3 stops

$1,909United Airlines

Find Deal

Thu, Oct 2 - Thu, Oct 9

4:30 pm - 3:50 pmSEA-ADL

30h 50m1 stop

9:40 pm - 12:45 pmADL-SEA

31h 35m1 stop

$2,229Qatar Airways

Find Deal

Mon, Sep 15 - Mon, Sep 22

12:00 pm - 12:55 pmSEA-ADL

56h 25m3 stops

6:10 am - 9:21 amADL-SEA

20h 41m2 stops

$13,601Air Canada

Find Deal

Thu, Oct 2 - Fri, Oct 10

Qantas Airways flights from Seattle to Adelaide

Our best Qantas Airways deals on Seattle to Adelaide flight tickets

Qantas Airways

Oct 2

SEA5:59 pmSeattle/Tacoma Intl

23h 51m

2 stops

ADL10:20 amAdelaide

Oct 9

ADL2:55 pmAdelaide

22h 42m

2 stops

SEA8:07 pmSeattle/Tacoma Intl

$1,079

Find similar

Qantas Airways

Oct 1

SEA4:59 pmSeattle/Tacoma Intl

24h 51m

2 stops

ADL10:20 amAdelaide

Oct 8

ADL2:55 pmAdelaide

23h 00m

2 stops

SEA8:25 pmSeattle/Tacoma Intl

$1,130

Find similar

Air Canada flights from Seattle to Adelaide

Our best Air Canada deals on Seattle to Adelaide flight tickets

Air Canada

Nov 2

SEA8:00 pmSeattle/Tacoma Intl

27h 40m

2 stops

ADL6:10 pmAdelaide

Nov 9

ADL6:10 amAdelaide

31h 36m

2 stops

SEA7:16 pmSeattle/Tacoma Intl

$1,084

Find similar

Air Canada

Oct 2

SEA12:00 pmSeattle/Tacoma Intl

56h 25m

3 stops

ADL12:55 pmAdelaide

Oct 10

ADL6:10 amAdelaide

20h 41m

2 stops

SEA9:21 amSeattle/Tacoma Intl

$13,601

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 10/31

8:00 pm-3:25 pm

2 stops25h 55m

Adelaide

Fri 11/14

6:10 am-7:16 pm

2 stops31h 36m

$1,036

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 9/15

12:00 pm-11:20 am

2 stops30h 50m

Adelaide

Mon 9/22

6:25 am-8:24 pm

2 stops30h 29m

$1,065

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 10/2

5:59 pm-10:20 am

2 stops23h 51m

Adelaide

Thu 10/9

2:55 pm-8:07 pm

2 stops22h 42m

$1,079

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 11/2

8:00 pm-6:10 pm

2 stops27h 40m

Adelaide

Sun 11/9

6:10 am-7:16 pm

2 stops31h 36m

$1,084

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 10/1

4:59 pm-10:20 am

2 stops24h 51m

Adelaide

Wed 10/8

2:55 pm-8:25 pm

2 stops23h 00m

$1,130

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 10/31

11:59 pm-10:55 am

2 stops41h 26m

Adelaide

Fri 11/14

7:15 am-8:51 pm

3 stops32h 06m

$1,276

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 9/15

4:30 pm-3:50 pm

1 stop30h 50m

Adelaide

Mon 9/22

6:20 pm-12:45 pm

2 stops34h 55m

$1,487

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 10/2

1:00 pm-11:05 am

2 stops29h 35m

Adelaide

Thu 10/9

6:00 am-9:15 pm

3 stops32h 45m

$1,909

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 9/15

4:30 pm-3:50 pm

1 stop30h 50m

Adelaide

Mon 9/22

9:40 pm-12:45 pm

1 stop31h 35m

$2,229

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 10/2

12:00 pm-12:55 pm

3 stops56h 25m

Adelaide

Fri 10/10

6:10 am-9:21 am

2 stops20h 41m

$13,601

Flights are sorted by cheapest round-trip flights first.

Sorted 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

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.

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

Best Price Found	$1,036
Fastest flight time	23h 51m
Direct flights	None
Airports in Adelaide	1 airport

The best flight deal from Seattle to Adelaide found on momondo in the last 72 hours is $1,036

The fastest flight from Seattle to Adelaide takes 23h 51m

There are no direct flights from Seattle to Adelaide. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Adelaide Airport.

There is 1 airport near Adelaide: Adelaide (ADL)

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 23h 51m, 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 August 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 7.5 896 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 $1,036

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Adelaide departing on 10/31. 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

Price Alerts

Price Alerts

Find the cheapest flights from Seattle to Adelaide

Cheap round-trip flights

Cheap one-way flights

Qantas Airways flights from Seattle to Adelaide

Our best Qantas Airways deals on Seattle to Adelaide flight tickets

Air Canada flights from Seattle to Adelaide

Our best Air Canada 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.

See travel insights to Adelaide from

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?

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

Best Price Found

Fastest flight time

Direct flights

Airports in Adelaide

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