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Cheap flights from Seattle to Adelaide from $664

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 8/7. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to Adelaide

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
2:20 pm - 9:25 am
SEA
-
ADL
26h 35m
2 stops
American Airlines Logo
7:50 am - 4:32 pm
ADL
-
SEA
25h 12m
2 stops
$1,164American Airlines
Sun, Aug 2 - Sun, Aug 16
United Airlines Logo
10:29 am - 11:10 am
SEA
-
ADL
32h 11m
2 stops
United Airlines Logo
6:05 am - 9:15 pm
ADL
-
SEA
31h 40m
3 stops
$1,174United Airlines
Sun, Aug 2 - Sun, Aug 16
United Airlines Logo
6:48 pm - 11:10 am
SEA
-
ADL
23h 52m
2 stops
United Airlines Logo
6:05 am - 4:14 pm
ADL
-
SEA
26h 39m
2 stops
$1,175United Airlines
Sun, Aug 2 - Sun, Aug 16
Qantas Airways Logo
5:10 pm - 9:25 am
SEA
-
ADL
23h 45m
2 stops
Qantas Airways Logo
11:50 am - 7:39 pm
ADL
-
SEA
24h 19m
2 stops
$1,259Qantas Airways
Thu, Aug 20 - Thu, Aug 27
Qantas Airways Logo
5:10 pm - 9:25 am
SEA
-
ADL
23h 45m
2 stops
Qantas Airways Logo
11:50 am - 7:39 pm
ADL
-
SEA
24h 19m
2 stops
$1,260Qantas Airways
Thu, Aug 20 - Thu, Aug 27
Multiple Airlines Logo
7:20 am - 10:35 pm
SEA
-
ADL
22h 45m
2 stops
Multiple Airlines Logo
12:40 pm - 11:53 pm
ADL
-
SEA
27h 43m
2 stops
$1,267Multiple Airlines
Fri, Aug 21 - Sat, Sep 5
United Airlines Logo
9:05 am - 11:05 am
SEA
-
ADL
33h 30m
2 stops
United Airlines Logo
6:00 am - 8:43 pm
ADL
-
SEA
31h 13m
2 stops
$1,279United Airlines
Sat, Aug 22 - Sat, Aug 29
United Airlines Logo
10:55 am - 10:55 am
SEA
-
ADL
31h 30m
2 stops
United Airlines Logo
8:00 pm - 9:15 pm
ADL
-
SEA
41h 45m
3 stops
$1,280United Airlines
Thu, Aug 20 - Thu, Aug 27
Multiple Airlines Logo
8:52 pm - 10:35 pm
SEA
-
ADL
33h 13m
2 stops
Multiple Airlines Logo
2:25 pm - 11:53 pm
ADL
-
SEA
25h 58m
2 stops
$1,283Multiple Airlines
Thu, Aug 20 - Thu, Aug 27
Qatar Airways Logo
4:25 pm - 3:00 pm
SEA
-
ADL
30h 05m
1 stop
Qatar Airways Logo
10:00 pm - 12:45 pm
ADL
-
SEA
31h 15m
1 stop
$1,301Qatar Airways
Fri, Aug 21 - Sat, Sep 5

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United Airlines flights from Seattle to Adelaide

Our best United Airlines deals on Seattle to Adelaide flight tickets
United Airlines
Aug 2
SEA6:48 pmSeattle/Tacoma Intl
23h 52m
2 stops
ADL11:10 amAdelaide
Aug 16
ADL6:05 amAdelaide
26h 39m
2 stops
SEA4:14 pmSeattle/Tacoma Intl
$1,174
United Airlines
Aug 2
SEA6:48 pmSeattle/Tacoma Intl
23h 52m
2 stops
ADL11:10 amAdelaide
Aug 16
ADL6:05 amAdelaide
26h 39m
2 stops
SEA4:14 pmSeattle/Tacoma Intl
$1,175
United Airlines
Aug 22
SEA9:05 amSeattle/Tacoma Intl
33h 30m
2 stops
ADL11:05 amAdelaide
Aug 29
ADL6:00 amAdelaide
31h 13m
2 stops
SEA8:43 pmSeattle/Tacoma Intl
$1,279

Qantas Airways flights from Seattle to Adelaide

Our best Qantas Airways deals on Seattle to Adelaide flight tickets
Qantas Airways
Aug 20
SEA5:10 pmSeattle/Tacoma Intl
23h 45m
2 stops
ADL9:25 amAdelaide
Aug 27
ADL6:00 amAdelaide
22h 50m
2 stops
SEA12:20 pmSeattle/Tacoma Intl
$1,251
Qantas Airways
Aug 20
SEA5:10 pmSeattle/Tacoma Intl
23h 45m
2 stops
ADL9:25 amAdelaide
Aug 27
ADL11:50 amAdelaide
24h 19m
2 stops
SEA7:39 pmSeattle/Tacoma Intl
$1,259
Qantas Airways
Aug 20
SEA5:10 pmSeattle/Tacoma Intl
23h 45m
2 stops
ADL9:25 amAdelaide
Aug 27
ADL11:50 amAdelaide
24h 19m
2 stops
SEA7:39 pmSeattle/Tacoma Intl
$1,260

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 July 13, 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

Sun 8/2

2:20 pm-9:25 am

2 stops26h 35m

Adelaide

Sun 8/16

7:50 am-4:32 pm

2 stops25h 12m

$1,164

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 8/2

10:29 am-11:10 am

2 stops32h 11m

Adelaide

Sun 8/16

6:05 am-9:15 pm

3 stops31h 40m

$1,174

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 8/2

6:48 pm-11:10 am

2 stops23h 52m

Adelaide

Sun 8/16

6:05 am-4:14 pm

2 stops26h 39m

$1,175
Quickest round-trip

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 8/20

5:10 pm-9:25 am

2 stops23h 45m

Adelaide

Thu 8/27

11:50 am-7:39 pm

2 stops24h 19m

$1,259

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 8/20

5:10 pm-9:25 am

2 stops23h 45m

Adelaide

Thu 8/27

11:50 am-7:39 pm

2 stops24h 19m

$1,260

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 8/21

7:20 am-10:35 pm

2 stops22h 45m

Adelaide

Sat 9/5

12:40 pm-11:53 pm

2 stops27h 43m

$1,267

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 8/22

9:05 am-11:05 am

2 stops33h 30m

Adelaide

Sat 8/29

6:00 am-8:43 pm

2 stops31h 13m

$1,279

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 8/20

10:55 am-10:55 am

2 stops31h 30m

Adelaide

Thu 8/27

8:00 pm-9:15 pm

3 stops41h 45m

$1,280

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 8/20

8:52 pm-10:35 pm

2 stops33h 13m

Adelaide

Thu 8/27

2:25 pm-11:53 pm

2 stops25h 58m

$1,283

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 8/21

4:25 pm-3:00 pm

1 stop30h 05m

Adelaide

Sat 9/5

10:00 pm-12:45 pm

1 stop31h 15m

$1,301

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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 41% 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

23h 52m

Direct flights

None
The fastest flight from Seattle to Adelaide takes 23h 52m
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 23h 52m, 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 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.

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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