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Cheap flights from Washington to Adelaide from $609

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 12/28. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:05 pm - 11:50 am
PDX
-
ADL
24h 15m2 stops
Multiple Airlines Logo
7:00 pm - 2:40 pm
ADL
-
PDX
36h 10m2 stops
$952Multiple Airlines
Sun, Apr 5 - Sat, Apr 18
Multiple Airlines Logo
8:00 pm - 6:50 pm
SEA
-
ADL
28h 20m2 stops
Multiple Airlines Logo
6:10 am - 2:31 pm
ADL
-
SEA
26h 51m2 stops
$964Multiple Airlines
Wed, Feb 4 - Wed, Feb 11
Multiple Airlines Logo
8:00 pm - 12:40 pm
SEA
-
ADL
23h 10m2 stops
Multiple Airlines Logo
6:55 pm - 3:03 pm
ADL
-
SEA
36h 38m2 stops
$989Multiple Airlines
Thu, Mar 26 - Tue, Apr 14
Air Canada Logo
8:00 pm - 7:10 pm
SEA
-
ADL
28h 40m2 stops
Air Canada Logo
6:00 am - 7:16 pm
ADL
-
SEA
30h 46m2 stops
$993Air Canada
Sat, Feb 28 - Tue, Mar 10
Multiple Airlines Logo
7:05 pm - 3:25 pm
PDX
-
ADL
25h 50m2 stops
Multiple Airlines Logo
6:00 am - 2:40 pm
ADL
-
PDX
27h 10m2 stops
$1,000Multiple Airlines
Mon, Feb 9 - Thu, Feb 19
Air Canada Logo
9:50 am - 1:55 pm
PDX
-
ADL
33h 35m2 stops
Air Canada Logo
6:10 am - 2:40 pm
ADL
-
PDX
27h 00m2 stops
$1,034Air Canada
Sun, Feb 8 - Sun, Feb 22
Air Canada Logo
3:15 pm - 10:30 pm
PDX
-
ADL
36h 45m2 stops
Air Canada Logo
6:10 am - 6:30 pm
ADL
-
PDX
30h 50m2 stops
$1,035Air Canada
Sun, Feb 15 - Sun, Mar 1
United Airlines Logo
5:20 pm - 9:30 am
SEA
-
ADL
21h 40m1 stop
United Airlines Logo
2:55 pm - 3:41 pm
ADL
-
SEA
19h 16m1 stop
$1,213United Airlines
Sat, Feb 14 - Sat, Feb 28
United Airlines Logo
9:19 am - 9:30 am
SEA
-
ADL
29h 41m1 stop
United Airlines Logo
2:55 pm - 9:12 pm
ADL
-
SEA
24h 47m2 stops
$1,217United Airlines
Sat, Feb 14 - Sat, Feb 28
United Airlines Logo
10:55 am - 9:30 am
SEA
-
ADL
28h 05m2 stops
United Airlines Logo
2:55 pm - 6:03 pm
ADL
-
SEA
45h 38m3 stops
$1,241United Airlines
Sat, Feb 14 - Sat, Feb 28

Singapore Airlines flights from State of Washington to Adelaide

Our best Singapore Airlines deals on State of Washington to Adelaide flight tickets
Singapore Airlines
May 9
SEA10:15 amSeattle/Tacoma Intl
37h 35m
1 stop
ADL4:20 pmAdelaide
May 16
ADL5:35 pmAdelaide
31h 40m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$1,636
Find similar
Singapore Airlines
Mar 26
SEA9:45 amSeattle/Tacoma Intl
38h 05m
1 stop
ADL5:20 pmAdelaide
Apr 14
ADL9:10 amAdelaide
64h 05m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$1,637
Find similar
Singapore Airlines
Feb 28
SEA8:45 amSeattle/Tacoma Intl
38h 05m
1 stop
ADL5:20 pmAdelaide
Mar 10
ADL10:15 amAdelaide
63h 25m
1 stop
SEA8:10 amSeattle/Tacoma Intl
$1,722
Find similar

Air Canada flights from State of Washington to Adelaide

Our best Air Canada deals on State of Washington to Adelaide flight tickets
Air Canada
Feb 28
SEA8:00 pmSeattle/Tacoma Intl
28h 40m
2 stops
ADL7:10 pmAdelaide
Mar 10
ADL6:00 amAdelaide
30h 46m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$993
Find similar
Air Canada
Feb 8
PDX9:50 amPortland
33h 35m
2 stops
ADL1:55 pmAdelaide
Feb 22
ADL6:10 amAdelaide
27h 00m
2 stops
PDX2:40 pmPortland
$1,034
Find similar
Air Canada
Feb 15
PDX3:15 pmPortland
36h 45m
2 stops
ADL10:30 pmAdelaide
Mar 3
ADL6:10 amAdelaide
30h 50m
2 stops
PDX6:30 pmPortland
$1,035
Find similar

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 December 23, 2025.
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

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 4/5

7:05 pm-11:50 am

2 stops24h 15m

Adelaide

Sat 4/18

7:00 pm-2:40 pm

2 stops36h 10m

$952

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 2/4

8:00 pm-6:50 pm

2 stops28h 20m

Adelaide

Wed 2/11

6:10 am-2:31 pm

2 stops26h 51m

$964

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 3/26

8:00 pm-12:40 pm

2 stops23h 10m

Adelaide

Tue 4/14

6:55 pm-3:03 pm

2 stops36h 38m

$989

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 2/28

8:00 pm-7:10 pm

2 stops28h 40m

Adelaide

Tue 3/10

6:00 am-7:16 pm

2 stops30h 46m

$993

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 2/9

7:05 pm-3:25 pm

2 stops25h 50m

Adelaide

Thu 2/19

6:00 am-2:40 pm

2 stops27h 10m

$1,000

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 2/8

9:50 am-1:55 pm

2 stops33h 35m

Adelaide

Sun 2/22

6:10 am-2:40 pm

2 stops27h 00m

$1,034

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 2/15

3:15 pm-10:30 pm

2 stops36h 45m

Adelaide

Sun 3/1

6:10 am-6:30 pm

2 stops30h 50m

$1,035

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 2/14

5:20 pm-9:30 am

1 stop21h 40m

Adelaide

Sat 2/28

2:55 pm-3:41 pm

1 stop19h 16m

$1,213

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 2/14

9:19 am-9:30 am

1 stop29h 41m

Adelaide

Sat 2/28

2:55 pm-9:12 pm

2 stops24h 47m

$1,217

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 2/14

10:55 am-9:30 am

2 stops28h 05m

Adelaide

Sat 2/28

2:55 pm-6:03 pm

3 stops45h 38m

$1,241

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 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

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

The cheapest day to depart on your flight to Adelaide is on a Wednesday when prices can be found for as low as $1,293. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Adelaide is Friday, with ticket prices averaging around $1,570.

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

According to our data, the cheapest time of day to fly to Adelaide is in the morning. momondo users have found flights departing from State of Washington to Adelaide in the morning for as low as $1,161. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Adelaide are more costly in the afternoon, with an average ticket price of $1,555. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on State of Washington to Adelaide flights?

You could potentially save up to 62% 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

19h 30m

Direct flights

None
The fastest flight from State of Washington to Adelaide takes 19h 30m
There are no direct flights from State of Washington to Adelaide. There are no popular flight routes from State of Washington to Adelaide.
Search flight deals

  • 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 many operators does momondo search for flights from Washington to Adelaide Airport?

  • 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.

Best airlines flying from State of Washington to Adelaide

Compare and see reviews for airlines that fly from State of Washington to Adelaide with momondo
Airline
Rating
Free Cancellation
Price
Qantas AirwaysPriceFrom $1,088Free CancellationRating
7.5
951 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 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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