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Cheap flights from Seattle to Adelaide from $721

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.
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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.
Qantas Airways Logo
5:28 pm - 11:55 am
SEA
-
ADL
25h 57m
2 stops
Qantas Airways Logo
1:20 pm - 9:58 pm
ADL
-
SEA
25h 08m
2 stops
$1,242Qantas Airways
Fri, Jun 5 - Tue, Jun 16
Multiple Airlines Logo
5:06 pm - 9:25 am
SEA
-
ADL
23h 49m
2 stops
Multiple Airlines Logo
6:00 am - 12:56 pm
ADL
-
SEA
23h 26m
2 stops
$1,266Multiple Airlines
Tue, May 12 - Tue, May 19
Multiple Airlines Logo
5:00 pm - 9:25 am
SEA
-
ADL
23h 55m
2 stops
Multiple Airlines Logo
6:00 am - 12:56 pm
ADL
-
SEA
23h 26m
2 stops
$1,275Multiple Airlines
Mon, Jun 1 - Mon, Jun 8
Multiple Airlines Logo
1:00 pm - 11:05 am
SEA
-
ADL
29h 35m
2 stops
Multiple Airlines Logo
1:15 pm - 10:44 pm
ADL
-
SEA
25h 59m
2 stops
$1,280Multiple Airlines
Thu, May 7 - Wed, May 20
Multiple Airlines Logo
6:40 pm - 11:05 am
SEA
-
ADL
23h 55m
2 stops
Multiple Airlines Logo
1:25 pm - 9:07 pm
ADL
-
SEA
24h 12m
2 stops
$1,288Multiple Airlines
Thu, May 7 - Wed, May 20
Multiple Airlines Logo
7:16 pm - 9:25 am
SEA
-
ADL
45h 39m
2 stops
Multiple Airlines Logo
6:25 am - 9:49 pm
ADL
-
SEA
31h 54m
2 stops
$1,295Multiple Airlines
Sat, May 30 - Tue, Jun 9
Multiple Airlines Logo
8:50 pm - 10:35 pm
SEA
-
ADL
33h 15m
2 stops
Multiple Airlines Logo
2:25 pm - 11:59 pm
ADL
-
SEA
26h 04m
2 stops
$1,298Multiple Airlines
Thu, May 28 - Thu, Jun 4
Multiple Airlines Logo
5:06 pm - 9:25 am
SEA
-
ADL
23h 49m
2 stops
Multiple Airlines Logo
9:15 am - 9:07 pm
ADL
-
SEA
28h 22m
2 stops
$1,316Multiple Airlines
Mon, May 4 - Wed, May 20
Multiple Airlines Logo
7:35 am - 10:35 pm
SEA
-
ADL
22h 30m
2 stops
Multiple Airlines Logo
7:10 pm - 11:59 pm
ADL
-
SEA
45h 19m
2 stops
$1,322Multiple Airlines
Wed, Jun 3 - Wed, Jun 17
Qantas Airways Logo
2:40 pm - 10:35 pm
SEA
-
ADL
39h 25m
2 stops
Qantas Airways Logo
1:15 pm - 9:58 pm
ADL
-
SEA
25h 13m
2 stops
$1,324Qantas Airways
Sun, Jun 7 - Tue, Jun 23

Qantas Airways flights from Seattle to Adelaide

Our best Qantas Airways deals on Seattle to Adelaide flight tickets
Qantas Airways
Jun 5
SEA5:28 pmSeattle/Tacoma Intl
25h 57m
2 stops
ADL11:55 amAdelaide
Jun 16
ADL1:20 pmAdelaide
25h 08m
2 stops
SEA9:58 pmSeattle/Tacoma Intl
$1,242
Qantas Airways
Jun 7
SEA2:40 pmSeattle/Tacoma Intl
39h 25m
2 stops
ADL10:35 pmAdelaide
Jun 23
ADL1:15 pmAdelaide
25h 13m
2 stops
SEA9:58 pmSeattle/Tacoma Intl
$1,324
Qantas Airways
Jun 2
SEA5:28 pmSeattle/Tacoma Intl
24h 22m
2 stops
ADL10:20 amAdelaide
Jun 16
ADL6:00 amAdelaide
32h 19m
2 stops
SEA9:49 pmSeattle/Tacoma Intl
$1,352

United Airlines flights from Seattle to Adelaide

Our best United Airlines deals on Seattle to Adelaide flight tickets
United Airlines
May 9
SEA4:32 pmSeattle/Tacoma Intl
25h 53m
2 stops
ADL10:55 amAdelaide
May 16
ADL6:05 amAdelaide
25h 01m
2 stops
SEA2:36 pmSeattle/Tacoma Intl
$1,386
United Airlines
May 27
SEA8:30 amSeattle/Tacoma Intl
34h 05m
2 stops
ADL11:05 amAdelaide
Jun 7
ADL6:05 amAdelaide
31h 35m
3 stops
SEA9:10 pmSeattle/Tacoma Intl
$1,399
United Airlines
May 31
SEA1:30 pmSeattle/Tacoma Intl
29h 10m
2 stops
ADL11:10 amAdelaide
Jun 7
ADL6:05 amAdelaide
31h 35m
3 stops
SEA9:10 pmSeattle/Tacoma Intl
$1,402

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 April 18, 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

Cheapest round-trip

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 6/5

5:28 pm-11:55 am

2 stops25h 57m

Adelaide

Tue 6/16

1:20 pm-9:58 pm

2 stops25h 08m

$1,242
Quickest round-trip

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 5/12

5:06 pm-9:25 am

2 stops23h 49m

Adelaide

Tue 5/19

6:00 am-12:56 pm

2 stops23h 26m

$1,266

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 6/1

5:00 pm-9:25 am

2 stops23h 55m

Adelaide

Mon 6/8

6:00 am-12:56 pm

2 stops23h 26m

$1,275

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 5/7

1:00 pm-11:05 am

2 stops29h 35m

Adelaide

Wed 5/20

1:15 pm-10:44 pm

2 stops25h 59m

$1,280

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 5/7

6:40 pm-11:05 am

2 stops23h 55m

Adelaide

Wed 5/20

1:25 pm-9:07 pm

2 stops24h 12m

$1,288

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 5/30

7:16 pm-9:25 am

2 stops45h 39m

Adelaide

Tue 6/9

6:25 am-9:49 pm

2 stops31h 54m

$1,295

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 5/28

8:50 pm-10:35 pm

2 stops33h 15m

Adelaide

Thu 6/4

2:25 pm-11:59 pm

2 stops26h 04m

$1,298

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 5/4

5:06 pm-9:25 am

2 stops23h 49m

Adelaide

Wed 5/20

9:15 am-9:07 pm

2 stops28h 22m

$1,316

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 6/3

7:35 am-10:35 pm

2 stops22h 30m

Adelaide

Wed 6/17

7:10 pm-11:59 pm

2 stops45h 19m

$1,322

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 6/7

2:40 pm-10:35 pm

2 stops39h 25m

Adelaide

Tue 6/23

1:15 pm-9:58 pm

2 stops25h 13m

$1,324

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

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

Frequently asked questions about flying from Seattle to Adelaide

  • 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
1,019 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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