Which airlines fly to Seattle?

Virgin Australia, Singapore Airlines and Qantas Airways are the top three most popular airlines that fly to Seattle from Adelaide according to our data. Virgin Australia is the first choice among our users, with 39% of people opting to fly with this airline when travelling to Seattle. Keep in mind that there are 6 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

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

United Airlines, Singapore Airlines, and Qatar Airways are the most popular carriers operating from Adelaide to Seattle/Tacoma Intl

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

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

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

There are 6 operators available for flights from Adelaide Airport to Seattle/Tacoma Intl Airport as of August 2025.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Adelaide Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The travel and health documents required for your trip to Seattle/Tacoma Intl 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 licence, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$919 Cheap Flights from Adelaide to Seattle in 2025

1 adult

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Find the cheapest flights from Adelaide to Seattle

Round-trip

One-way

Cheap return flights

14:55 - 00:59ADL-SEA

28h 34m1 stop

12:50 - 09:30SEA-ADL

26h 10m1 stop

$1,653United Airlines

Find Deal

Mon, 15 Dec - Sat, 17 Jan

14:55 - 21:15ADL-SEA

24h 50m2 stops

08:30 - 09:30SEA-ADL

30h 30m2 stops

$1,661United Airlines

Find Deal

Mon, 15 Dec - Sat, 17 Jan

07:50 - 12:56ADL-SEA

23h 36m2 stops

16:00 - 13:35SEA-ADL

27h 05m3 stops

$3,344

Find Deal

Mon, 15 Dec - Tue, 20 Jan

07:50 - 12:56ADL-SEA

23h 36m2 stops

16:00 - 13:35SEA-ADL

27h 05m3 stops

$3,358

Find Deal

Mon, 15 Dec - Tue, 20 Jan

12:25 - 18:10ADL-SEA

48h 15m2 stops

00:10 - 17:45SEA-ADL

47h 05m2 stops

$3,577China Airlines

Find Deal

Mon, 15 Dec - Mon, 19 Jan

18:30 - 18:10ADL-SEA

42h 10m2 stops

00:10 - 17:45SEA-ADL

47h 05m2 stops

$3,838China Airlines

Find Deal

Wed, 17 Dec - Mon, 19 Jan

22:00 - 11:40ADL-SEA

32h 10m1 stop

16:05 - 17:05SEA-ADL

30h 30m1 stop

$4,220Qatar Airways

Find Deal

Wed, 17 Dec - Tue, 20 Jan

22:00 - 11:40ADL-SEA

32h 10m1 stop

16:05 - 17:05SEA-ADL

30h 30m1 stop

$4,254Qatar Airways

Find Deal

Wed, 17 Dec - Tue, 20 Jan

17:35 - 08:45ADL-SEA

55h 40m1 stop

10:15 - 07:25SEA-ADL

28h 40m1 stop

$11,030Singapore Airlines

Find Deal

Fri, 19 Sep - Fri, 26 Sep

09:10 - 08:45ADL-SEA

64h 05m1 stop

07:00 - 07:25SEA-ADL

31h 55m2 stops

$11,573Singapore Airlines

Find Deal

Wed, 3 Sep - Mon, 8 Sep

Singapore Airlines flights from Adelaide to Seattle

Our best Singapore Airlines deals on Adelaide to Seattle flight tickets

Singapore Airlines

19 Sept

ADL17:35Adelaide

55h 40m

1 stop

SEA08:45Seattle/Tacoma Intl

26 Sept

SEA10:15Seattle/Tacoma Intl

28h 40m

1 stop

ADL07:25Adelaide

$11,030

Find similar

Singapore Airlines

3 Sept

ADL09:10Adelaide

64h 05m

1 stop

SEA08:45Seattle/Tacoma Intl

8 Sept

SEA07:00Seattle/Tacoma Intl

31h 55m

2 stops

ADL07:25Adelaide

$11,573

Find similar

Singapore Airlines

19 Sept

ADL17:35Adelaide

31h 40m

1 stop

SEA08:45Seattle/Tacoma Intl

26 Sept

SEA21:40Seattle/Tacoma Intl

50h 10m

2 stops

ADL16:20Adelaide

$11,969

Find similar

Qatar Airways flights from Adelaide to Seattle

Our best Qatar Airways deals on Adelaide to Seattle flight tickets

Qatar Airways

17 Dec

ADL22:00Adelaide

32h 10m

1 stop

SEA11:40Seattle/Tacoma Intl

20 Jan

SEA16:05Seattle/Tacoma Intl

30h 30m

1 stop

ADL17:05Adelaide

$4,220

Find similar

Qatar Airways

17 Dec

ADL22:00Adelaide

32h 10m

1 stop

SEA11:40Seattle/Tacoma Intl

20 Jan

SEA16:05Seattle/Tacoma Intl

30h 30m

1 stop

ADL17:05Adelaide

$4,254

Find similar

Qatar Airways

15 Dec

ADL22:00Adelaide

32h 10m

1 stop

SEA11:40Seattle/Tacoma Intl

20 Jan

SEA16:05Seattle/Tacoma Intl

30h 30m

1 stop

ADL17:05Adelaide

$4,259

Find similar

Fly from

Fly to

Route

Depart

Return

Price

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 15/12

14:55-00:59

1 stop28h 34m

Seattle/Tacoma Intl

Sat 17/1

12:50-09:30

1 stop26h 10m

$1,653

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 15/12

14:55-21:15

2 stops24h 50m

Seattle/Tacoma Intl

Sat 17/1

08:30-09:30

2 stops30h 30m

$1,661

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 15/12

07:50-12:56

2 stops23h 36m

Seattle/Tacoma Intl

Tue 20/1

16:00-13:35

3 stops27h 05m

$3,344

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 15/12

07:50-12:56

2 stops23h 36m

Seattle/Tacoma Intl

Tue 20/1

16:00-13:35

3 stops27h 05m

$3,358

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 15/12

12:25-18:10

2 stops48h 15m

Seattle/Tacoma Intl

Mon 19/1

00:10-17:45

2 stops47h 05m

$3,577

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Wed 17/12

18:30-18:10

2 stops42h 10m

Seattle/Tacoma Intl

Mon 19/1

00:10-17:45

2 stops47h 05m

$3,838

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Wed 17/12

22:00-11:40

1 stop32h 10m

Seattle/Tacoma Intl

Tue 20/1

16:05-17:05

1 stop30h 30m

$4,220

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Wed 17/12

22:00-11:40

1 stop32h 10m

Seattle/Tacoma Intl

Tue 20/1

16:05-17:05

1 stop30h 30m

$4,254

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Fri 19/9

17:35-08:45

1 stop55h 40m

Seattle/Tacoma Intl

Fri 26/9

10:15-07:25

1 stop28h 40m

$11,030

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Wed 3/9

09:10-08:45

1 stop64h 05m

Seattle/Tacoma Intl

Mon 8/9

07:00-07:25

2 stops31h 55m

$11,573

Flights are sorted by cheapest return flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

How to get the cheapest flight ticket from Adelaide to Seattle

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 month to fly to Seattle?

The month of November is, on average, the cheapest month to fly to Seattle from Adelaide, with most prices found around $1,491. If you are unable to visit Seattle during the month of November, then departing from Adelaide during the month February is also very affordable. Most momondo users find prices during this month for around $1,743.

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

The cheapest day to depart from Adelaide to Seattle is on a Tuesday. Travellers who choose to depart for Seattle on a Tuesday will often find tickets for as low as $1,626. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Adelaide to Seattle for around $2,361.

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

According to our data, the cheapest time of day to fly to Seattle is in the afternoon. momondo users have found flights departing from Adelaide to Seattle in the afternoon for as low as $1,808. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Seattle is at midday when prices are around $2,424.

When to book flights from Adelaide to Seattle

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

Estimated return price

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

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

Best price found	$1,045
Fastest flight time	23h 17m
Direct flights	None
Airports in Seattle	1 airport

The best one-way flight to Seattle from Adelaide in the past 72 hours is $1,045. The best return flight deal from Adelaide to Seattle found on momondo in the last 72 hours is $1,653.

The fastest flight from Adelaide to Seattle takes 23h 17m

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

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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How far is Adelaide to Seattle/Tacoma Intl by plane?
Adelaide and Seattle/Tacoma Intl are 13407.3 km apart from one another. A reasonable flight in good conditions will take 23h 17m.
When did momondo last update prices for flights from Adelaide Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Adelaide Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Adelaide Airport to Seattle/Tacoma Intl Airport?
There are 6 operators available for flights from Adelaide Airport to Seattle/Tacoma Intl Airport as of August 2025.
How old do you have to be to fly from Adelaide Airport to Seattle/Tacoma Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Adelaide Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma Intl 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 licence, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl 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 Adelaide to Seattle?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Adelaide to Seattle is Virgin Australia (33% of total bookings). The next most popular airlines are Singapore Airlines (19%), Qantas Airways (17%), and United Airlines (16%).

Best airlines flying from Adelaide to Seattle

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

Airline	Rating	Free cancellation	Price
Air New Zealand	PriceFrom $948	Free cancellation	Rating 7.9 502 reviews	Search Air New Zealand flights
Qantas Airways	PriceFrom $1,377	Free cancellation	Rating 7.5 887 reviews	Search Qantas Airways flights
Singapore Airlines	PriceFrom $1,438	Free cancellation	Rating 8.1 1,342 reviews	Search Singapore Airlines flights
Air Canada	PriceFrom $1,490	Free cancellation	Rating 7.1 9,890 reviews	Search Air Canada flights
Virgin Australia	PriceFrom $1,760	Free cancellation	Rating 7.5 411 reviews	Search Virgin Australia flights
United Airlines	PriceFrom $1,762	Free cancellation	Rating 7.4 8,916 reviews	Search United Airlines flights

Leavenworth

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Why use momondo?

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

Finding the right flight to Seattle from Adelaide 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 Seattle quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for Adelaide to Seattle flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Adelaide to Seattle.

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

Yes momondo offers price alerts on flights to Seattle from Adelaide. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.