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Cheap flights from Seattle to Adelaide from $623

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 5/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to Adelaide

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:00 pm - 11:15 am
SEA
-
ADL
22h 45m
2 stops
Multiple Airlines Logo
6:55 pm - 7:20 pm
ADL
-
SEA
40h 55m
2 stops
$896Multiple Airlines
Tue, Apr 14 - Tue, Apr 21
Multiple Airlines Logo
3:40 pm - 11:50 am
SEA
-
ADL
27h 40m
2 stops
Multiple Airlines Logo
5:15 pm - 9:38 am
ADL
-
SEA
32h 53m
2 stops
$935Multiple Airlines
Wed, Apr 15 - Wed, Apr 22
Multiple Airlines Logo
7:20 pm - 1:55 pm
SEA
-
ADL
26h 05m
2 stops
Multiple Airlines Logo
7:35 pm - 9:17 am
ADL
-
SEA
30h 12m
2 stops
$1,141Multiple Airlines
Mon, Jul 6 - Fri, Jul 24
Multiple Airlines Logo
8:00 am - 10:35 pm
SEA
-
ADL
22h 05m
2 stops
Multiple Airlines Logo
12:40 pm - 11:59 pm
ADL
-
SEA
27h 49m
2 stops
$1,221Multiple Airlines
Mon, Jul 6 - Fri, Jul 24
Multiple Airlines Logo
8:00 am - 10:35 pm
SEA
-
ADL
22h 05m
2 stops
Multiple Airlines Logo
12:40 pm - 11:59 pm
ADL
-
SEA
27h 49m
2 stops
$1,222Multiple Airlines
Mon, Jul 6 - Fri, Jul 24
Air New Zealand Logo
3:40 pm - 10:55 am
SEA
-
ADL
26h 45m
2 stops
Air New Zealand Logo
7:50 am - 6:35 pm
ADL
-
SEA
27h 15m
3 stops
$1,312Air New Zealand
Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
12:22 pm - 10:05 am
SEA
-
ADL
29h 13m
2 stops
United Airlines Logo
6:05 am - 9:06 pm
ADL
-
SEA
31h 31m
3 stops
$1,378United Airlines
Wed, Apr 15 - Wed, Apr 22
Air New Zealand Logo
6:30 am - 10:20 am
SEA
-
ADL
35h 20m
2 stops
Air New Zealand Logo
6:00 am - 9:59 pm
ADL
-
SEA
32h 29m
3 stops
$1,530Air New Zealand
Mon, Jul 6 - Fri, Jul 24
Qatar Airways Logo
4:30 pm - 3:50 pm
SEA
-
ADL
30h 50m
1 stop
Qatar Airways Logo
6:20 pm - 12:45 pm
ADL
-
SEA
34h 55m
2 stops
$1,575Qatar Airways
Tue, Apr 14 - Tue, Apr 21
Multiple Airlines Logo
10:20 am - 11:50 am
SEA
-
ADL
33h 00m
2 stops
Multiple Airlines Logo
9:10 am - 8:45 am
ADL
-
SEA
40h 05m
1 stop
$1,643Multiple Airlines
Wed, Apr 15 - Wed, Apr 22

Qantas Airways flights from Seattle to Adelaide

Our best Qantas Airways deals on Seattle to Adelaide flight tickets
Qantas Airways
Mar 7
SEA12:50 pmSeattle/Tacoma Intl
28h 30m
2 stops
ADL11:50 amAdelaide
Mar 11
ADL7:00 pmAdelaide
41h 23m
2 stops
SEA6:53 pmSeattle/Tacoma Intl
$1,444
Qantas Airways
Mar 7
SEA12:50 pmSeattle/Tacoma Intl
39h 10m
2 stops
ADL10:30 pmAdelaide
Mar 11
ADL6:00 amAdelaide
30h 23m
2 stops
SEA6:53 pmSeattle/Tacoma Intl
$1,548

United Airlines flights from Seattle to Adelaide

Our best United Airlines deals on Seattle to Adelaide flight tickets
United Airlines
Apr 15
SEA12:22 pmSeattle/Tacoma Intl
29h 13m
2 stops
ADL10:05 amAdelaide
Apr 22
ADL6:05 amAdelaide
31h 31m
3 stops
SEA9:06 pmSeattle/Tacoma Intl
$1,378
United Airlines
Mar 7
SEA12:36 pmSeattle/Tacoma Intl
26h 24m
1 stop
ADL9:30 amAdelaide
Mar 11
ADL12:45 pmAdelaide
40h 25m
2 stops
SEA11:40 amSeattle/Tacoma Intl
$1,464
United Airlines
Mar 7
SEA9:20 amSeattle/Tacoma Intl
29h 40m
1 stop
ADL9:30 amAdelaide
Mar 11
ADL12:45 pmAdelaide
40h 25m
2 stops
SEA11:40 amSeattle/Tacoma Intl
$1,465

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Adelaide that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 2, 2026.
Use the filters below to find and compare flights from Seattle to Adelaide that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 4/14

8:00 pm-11:15 am

2 stops22h 45m

Adelaide

Tue 4/21

6:55 pm-7:20 pm

2 stops40h 55m

$896

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 4/15

3:40 pm-11:50 am

2 stops27h 40m

Adelaide

Wed 4/22

5:15 pm-9:38 am

2 stops32h 53m

$935

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

7:20 pm-1:55 pm

2 stops26h 05m

Adelaide

Fri 7/24

7:35 pm-9:17 am

2 stops30h 12m

$1,141

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

8:00 am-10:35 pm

2 stops22h 05m

Adelaide

Fri 7/24

12:40 pm-11:59 pm

2 stops27h 49m

$1,221

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

8:00 am-10:35 pm

2 stops22h 05m

Adelaide

Fri 7/24

12:40 pm-11:59 pm

2 stops27h 49m

$1,222

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 4/14

3:40 pm-10:55 am

2 stops26h 45m

Adelaide

Tue 4/21

7:50 am-6:35 pm

3 stops27h 15m

$1,312

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 4/15

12:22 pm-10:05 am

2 stops29h 13m

Adelaide

Wed 4/22

6:05 am-9:06 pm

3 stops31h 31m

$1,378

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

6:30 am-10:20 am

2 stops35h 20m

Adelaide

Fri 7/24

6:00 am-9:59 pm

3 stops32h 29m

$1,530

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 4/14

4:30 pm-3:50 pm

1 stop30h 50m

Adelaide

Tue 4/21

6:20 pm-12:45 pm

2 stops34h 55m

$1,575

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 4/15

10:20 am-11:50 am

2 stops33h 00m

Adelaide

Wed 4/22

9:10 am-8:45 am

1 stop40h 05m

$1,643

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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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

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

22h 05m

Direct flights

None
The fastest flight from Seattle to Adelaide takes 22h 05m
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 22h 05m, 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?

  • 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?

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 AirwaysPriceFrom $1,088Free CancellationRating
7.5
1,000 reviews
Search Qantas Airways flights

Traveling to a place near Adelaide?

Book flights to Adelaide if you plan to visit one of these locations
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.

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