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Cheap flights from Washington to Adelaide from $471

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Adelaide departing on 8/8. 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 Washington to Adelaide

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:45 pm - 11:50 am
PDX
-
ADL
23h 35m
2 stops
Multiple Airlines Logo
8:00 pm - 2:46 pm
ADL
-
PDX
35h 16m
2 stops
$1,083Multiple Airlines
Tue, Sep 8 - Tue, Sep 29
Multiple Airlines Logo
3:00 pm - 11:10 am
SEA
-
ADL
27h 40m
2 stops
Multiple Airlines Logo
8:00 pm - 10:07 am
ADL
-
SEA
30h 37m
2 stops
$1,294Multiple Airlines
Sun, Aug 2 - Sun, Aug 16
Multiple Airlines Logo
7:20 pm - 6:10 pm
SEA
-
ADL
30h 20m
2 stops
Multiple Airlines Logo
8:00 pm - 2:22 pm
ADL
-
SEA
34h 52m
2 stops
$1,295Multiple Airlines
Sun, Aug 2 - Sun, Aug 16
Multiple Airlines Logo
3:00 pm - 11:50 am
SEA
-
ADL
28h 20m
2 stops
Multiple Airlines Logo
7:35 pm - 10:07 am
ADL
-
SEA
31h 02m
2 stops
$1,296Multiple Airlines
Tue, Sep 8 - Tue, Sep 29
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
$1,299United Airlines
Sun, Aug 2 - Sun, Aug 16
Air Canada Logo
7:20 pm - 6:10 pm
SEA
-
ADL
30h 20m
2 stops
Air Canada Logo
6:55 pm - 2:22 pm
ADL
-
SEA
35h 57m
2 stops
$1,301Air Canada
Sun, Aug 2 - Mon, Aug 17
Multiple Airlines Logo
8:00 am - 10:35 pm
SEA
-
ADL
22h 05m
2 stops
Multiple Airlines Logo
2:25 pm - 11:53 pm
ADL
-
SEA
25h 58m
2 stops
$1,305Multiple Airlines
Fri, Aug 14 - Fri, Aug 28
United Airlines Logo
1:30 pm - 1:45 pm
SEA
-
ADL
31h 45m
2 stops
United Airlines Logo
6:05 am - 9:15 pm
ADL
-
SEA
31h 40m
3 stops
$1,456United Airlines
Sun, Aug 2 - Sun, Aug 16
Cathay Pacific Logo
8:18 pm - 9:25 am
PDX
-
ADL
44h 37m
3 stops
Cathay Pacific Logo
7:45 pm - 8:36 pm
ADL
-
PDX
41h 21m
3 stops
$2,066Cathay Pacific
Tue, Sep 8 - Tue, Sep 29
Malaysia Airlines Logo
7:30 pm - 7:00 am
PDX
-
ADL
43h 00m
2 stops
Malaysia Airlines Logo
9:45 am - 7:36 pm
ADL
-
PDX
50h 21m
3 stops
$3,861Malaysia Airlines
Tue, Sep 8 - Tue, Sep 29

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Air New Zealand flights from State of Washington to Adelaide

Our best Air New Zealand deals on State of Washington to Adelaide flight tickets
Air New Zealand
Aug 2
SEA10:45 amSeattle/Tacoma Intl
34h 25m
3 stops
ADL1:40 pmAdelaide
Aug 17
ADL6:25 amAdelaide
33h 31m
3 stops
SEA11:26 pmSeattle/Tacoma Intl
$1,727
Air New Zealand
Aug 20
SEA6:52 pmSeattle/Tacoma Intl
24h 33m
2 stops
ADL11:55 amAdelaide
Sep 3
ADL6:25 amAdelaide
32h 47m
3 stops
SEA10:42 pmSeattle/Tacoma Intl
$1,931

United Airlines flights from State of Washington to Adelaide

Our best United Airlines deals on State of Washington to Adelaide flight tickets
United Airlines
Aug 2
SEA1:30 pmSeattle/Tacoma Intl
31h 45m
2 stops
ADL1:45 pmAdelaide
Aug 16
ADL6:05 amAdelaide
31h 40m
3 stops
SEA9:15 pmSeattle/Tacoma Intl
$1,455
United Airlines
Aug 2
SEA1:30 pmSeattle/Tacoma Intl
31h 45m
2 stops
ADL1:45 pmAdelaide
Aug 16
ADL6:05 amAdelaide
31h 40m
3 stops
SEA9:15 pmSeattle/Tacoma Intl
$1,456
United Airlines
Aug 2
SEA3:33 pmSeattle/Tacoma Intl
27h 07m
2 stops
ADL11:10 amAdelaide
Aug 17
ADL8:00 pmAdelaide
42h 01m
3 stops
SEA9:31 pmSeattle/Tacoma Intl
$1,466

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington 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 June 25, 2026.
Use the filters below to find and compare flights from Washington to Adelaide that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Tue 9/8

7:45 pm-11:50 am

2 stops23h 35m

Adelaide

Tue 9/29

8:00 pm-2:46 pm

2 stops35h 16m

$1,083

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 8/2

3:00 pm-11:10 am

2 stops27h 40m

Adelaide

Sun 8/16

8:00 pm-10:07 am

2 stops30h 37m

$1,294

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 8/2

7:20 pm-6:10 pm

2 stops30h 20m

Adelaide

Sun 8/16

8:00 pm-2:22 pm

2 stops34h 52m

$1,295

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 9/8

3:00 pm-11:50 am

2 stops28h 20m

Adelaide

Tue 9/29

7:35 pm-10:07 am

2 stops31h 02m

$1,296

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

$1,299

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 8/2

7:20 pm-6:10 pm

2 stops30h 20m

Adelaide

Mon 8/17

6:55 pm-2:22 pm

2 stops35h 57m

$1,301
Quickest round-trip

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 8/14

8:00 am-10:35 pm

2 stops22h 05m

Adelaide

Fri 8/28

2:25 pm-11:53 pm

2 stops25h 58m

$1,305

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 8/2

1:30 pm-1:45 pm

2 stops31h 45m

Adelaide

Sun 8/16

6:05 am-9:15 pm

3 stops31h 40m

$1,456

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Tue 9/8

8:18 pm-9:25 am

3 stops44h 37m

Adelaide

Tue 9/29

7:45 pm-8:36 pm

3 stops41h 21m

$2,066

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Tue 9/8

7:30 pm-7:00 am

2 stops43h 00m

Adelaide

Tue 9/29

9:45 am-7:36 pm

3 stops50h 21m

$3,861

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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See travel insights to Adelaide from

How to get the cheapest flight ticket from State of Washington 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 State of Washington to Adelaide flights?

You could potentially save up to 41% on your flight if you consider stops on a State of Washington to Adelaide flight.

Cheap State of Washington to Adelaide flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Adelaide

Fastest flight time

23h 20m

Direct flights

None
The fastest flight from State of Washington to Adelaide takes 23h 20m
There are no direct flights from State of Washington to Adelaide. There are no popular flight routes from State of Washington to Adelaide.
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Frequently asked questions about flying from Washington to Adelaide

  • When did momondo last update prices for flights from Washington to Adelaide Airport?

    Prices for flights from Washington to Adelaide Airport were last updated today.

  • How old do you have to be to fly from Washington to Adelaide Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Adelaide Airport.

  • What documentation or ID do you need to fly to Adelaide Airport?

    The necessary travel and health documents for your Adelaide Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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 Washington to Adelaide?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington to Adelaide. momondo saves you time and could save you money on your trip.

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

Yes. All flights to Adelaide from Washington on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

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 Washington to Adelaide.

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

Yes. momondo can track prices for Washington to Adelaide flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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