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

Qantas Airways and Cathay Pacific are the most popular carriers 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 January 2026, 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.

$663 Cheap Flights from Seattle to Adelaide in 2026

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Round-trip

One-way

Cheap round-trip flights

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8:00 pm - 1:55 pm

SEA

ADL

23h 25m

2 stops

6:10 am - 9:06 pm

ADL

SEA

33h 26m

2 stops

$955Air Canada

Sun, Mar 1 - Sun, Mar 8

3:00 pm - 11:10 am

SEA

ADL

27h 40m

2 stops

5:15 pm - 9:17 am

ADL

SEA

32h 32m

2 stops

$1,043Multiple Airlines

Sat, Jun 27 - Wed, Aug 5

3:40 pm - 10:30 pm

SEA

ADL

36h 20m

2 stops

6:00 am - 9:15 am

ADL

SEA

21h 45m

2 stops

$1,092Air Canada

Sun, Feb 15 - Thu, Feb 19

5:10 pm - 9:30 am

SEA

ADL

21h 50m

1 stop

2:55 pm - 12:59 am

ADL

SEA

28h 34m

1 stop

$1,115United Airlines

Mon, Feb 9 - Mon, Feb 16

12:25 pm - 9:30 am

SEA

ADL

26h 35m

2 stops

2:55 pm - 10:59 pm

ADL

SEA

26h 34m

2 stops

$1,119United Airlines

Mon, Feb 9 - Mon, Feb 16

10:58 am - 9:30 am

SEA

ADL

28h 02m

2 stops

2:55 pm - 6:03 pm

ADL

SEA

69h 38m

3 stops

$1,143United Airlines

Mon, Feb 9 - Mon, Feb 16

5:50 pm - 12:15 pm

SEA

ADL

24h 55m

2 stops

1:35 pm - 6:51 pm

ADL

SEA

22h 46m

2 stops

$1,146Multiple Airlines

Thu, Mar 12 - Mon, Mar 30

3:40 pm - 10:30 pm

SEA

ADL

36h 20m

2 stops

6:00 am - 2:46 pm

ADL

SEA

27h 16m

2 stops

$1,167Air Canada

Sun, Feb 15 - Thu, Feb 19

7:20 pm - 1:30 pm

SEA

ADL

25h 40m

2 stops

7:40 pm - 9:17 am

ADL

SEA

30h 07m

2 stops

$1,226Multiple Airlines

Mon, Jul 6 - Fri, Jul 24

7:20 pm - 1:30 pm

SEA

ADL

25h 40m

2 stops

7:40 pm - 9:17 am

ADL

SEA

30h 07m

2 stops

$1,227Multiple Airlines

Mon, Jul 6 - Fri, Jul 24

Air Canada flights from Seattle to Adelaide

Our best Air Canada deals on Seattle to Adelaide flight tickets

Air Canada

Mar 1

SEA8:00 pmSeattle/Tacoma Intl

23h 25m

2 stops

ADL1:55 pmAdelaide

Mar 8

ADL6:10 amAdelaide

33h 26m

2 stops

SEA9:06 pmSeattle/Tacoma Intl

$955

Air Canada

Feb 15

SEA3:40 pmSeattle/Tacoma Intl

36h 20m

2 stops

ADL10:30 pmAdelaide

Feb 19

ADL6:00 amAdelaide

21h 45m

2 stops

SEA9:15 amSeattle/Tacoma Intl

$1,092

Air Canada

Feb 15

SEA3:40 pmSeattle/Tacoma Intl

36h 20m

2 stops

ADL10:30 pmAdelaide

Feb 19

ADL6:00 amAdelaide

27h 16m

2 stops

SEA2:46 pmSeattle/Tacoma Intl

$1,167

United Airlines flights from Seattle to Adelaide

Our best United Airlines deals on Seattle to Adelaide flight tickets

United Airlines

Feb 9

SEA5:10 pmSeattle/Tacoma Intl

21h 50m

1 stop

ADL9:30 amAdelaide

Feb 16

ADL2:55 pmAdelaide

28h 34m

1 stop

SEA12:59 amSeattle/Tacoma Intl

$1,115

United Airlines

Feb 9

SEA12:25 pmSeattle/Tacoma Intl

26h 35m

2 stops

ADL9:30 amAdelaide

Feb 16

ADL2:55 pmAdelaide

26h 34m

2 stops

SEA10:59 pmSeattle/Tacoma Intl

$1,119

United Airlines

Feb 9

SEA10:58 amSeattle/Tacoma Intl

28h 02m

2 stops

ADL9:30 amAdelaide

Feb 16

ADL2:55 pmAdelaide

69h 38m

3 stops

SEA6:03 pmSeattle/Tacoma Intl

$1,143

Fly from

Fly to

Route

Depart

Return

Price

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 3/1

8:00 pm-1:55 pm

2 stops23h 25m

Adelaide

Sun 3/8

6:10 am-9:06 pm

2 stops33h 26m

$955

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 6/27

3:00 pm-11:10 am

2 stops27h 40m

Adelaide

Wed 8/5

5:15 pm-9:17 am

2 stops32h 32m

$1,043

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/15

3:40 pm-10:30 pm

2 stops36h 20m

Adelaide

Thu 2/19

6:00 am-9:15 am

2 stops21h 45m

$1,092

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/9

5:10 pm-9:30 am

1 stop21h 50m

Adelaide

Mon 2/16

2:55 pm-12:59 am

1 stop28h 34m

$1,115

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/9

12:25 pm-9:30 am

2 stops26h 35m

Adelaide

Mon 2/16

2:55 pm-10:59 pm

2 stops26h 34m

$1,119

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/9

10:58 am-9:30 am

2 stops28h 02m

Adelaide

Mon 2/16

2:55 pm-6:03 pm

3 stops69h 38m

$1,143

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 3/12

5:50 pm-12:15 pm

2 stops24h 55m

Adelaide

Mon 3/30

1:35 pm-6:51 pm

2 stops22h 46m

$1,146

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/15

3:40 pm-10:30 pm

2 stops36h 20m

Adelaide

Thu 2/19

6:00 am-2:46 pm

2 stops27h 16m

$1,167

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

7:20 pm-1:30 pm

2 stops25h 40m

Adelaide

Fri 7/24

7:40 pm-9:17 am

2 stops30h 07m

$1,226

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

7:20 pm-1:30 pm

2 stops25h 40m

Adelaide

Fri 7/24

7:40 pm-9:17 am

2 stops30h 07m

$1,227

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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

Prices

Airlines

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 55m
Direct flights	None

The fastest flight from Seattle to Adelaide takes 24h 55m

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 24h 55m, 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 January 2026, 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 7.5 971 reviews		Search Qantas Airways flights

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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.

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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 $663

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

Price Alerts

Price Alerts

Find the cheapest flights from Seattle to Adelaide

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Air Canada flights from Seattle to Adelaide

Our best Air Canada deals on Seattle to Adelaide flight tickets

United Airlines flights from Seattle to Adelaide

Our best United Airlines 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

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 and Cathay Pacific are the most popular carriers 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