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Cheap flights from Washington to Adelaide from $607

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.
Air Canada Logo
8:00 pm - 1:55 pmSEA-ADL
24h 25m2 stops
Air Canada Logo
6:10 am - 9:31 amADL-SEA
20h 51m2 stops
$1,181Air Canada
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Sun, Mar 15 - Thu, Mar 19
Air Canada Logo
5:50 am - 1:55 pmSEA-ADL
38h 35m2 stops
Air Canada Logo
6:10 am - 9:31 amADL-SEA
20h 51m2 stops
$1,182Air Canada
Find Deal
Sun, Mar 15 - Thu, Mar 19
Qantas Airways Logo
5:41 am - 11:15 amPDX-ADL
35h 04m2 stops
Qantas Airways Logo
8:55 pm - 10:25 pmADL-PDX
44h 00m2 stops
$1,202Qantas Airways
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Fri, Dec 5 - Fri, Dec 12
Qantas Airways Logo
5:50 pm - 8:25 pmPDX-ADL
32h 05m2 stops
Qantas Airways Logo
6:05 am - 8:34 pmADL-PDX
32h 59m2 stops
$1,210Qantas Airways
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Sun, Jan 11 - Sat, Jan 31
Multiple Airlines Logo
4:30 pm - 10:55 amSEA-ADL
23h 55m2 stops
Multiple Airlines Logo
11:40 am - 11:57 pmADL-SEA
30h 47m2 stops
$1,444Multiple Airlines
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Tue, Nov 11 - Tue, Nov 25
Qatar Airways Logo
4:05 pm - 5:05 pmSEA-ADL
30h 30m1 stop
Qatar Airways Logo
10:00 pm - 11:40 amADL-SEA
32h 10m1 stop
$1,509Qatar Airways
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Thu, Nov 13 - Mon, Nov 24
Qatar Airways Logo
4:05 pm - 5:05 pmSEA-ADL
30h 30m1 stop
Qatar Airways Logo
12:35 pm - 11:40 amADL-SEA
41h 35m2 stops
$1,549Qatar Airways
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Thu, Nov 13 - Sun, Nov 23
Multiple Airlines Logo
5:57 pm - 10:30 amSEA-ADL
46h 03m2 stops
Multiple Airlines Logo
2:25 pm - 3:46 pmADL-SEA
43h 51m3 stops
$1,551Multiple Airlines
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Tue, Nov 11 - Tue, Nov 25
Cathay Pacific Logo
5:30 pm - 10:30 amSEA-ADL
46h 30m2 stops
Cathay Pacific Logo
12:00 pm - 2:55 pmADL-SEA
45h 25m2 stops
$1,592Cathay Pacific
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Thu, Nov 13 - Wed, Nov 26
Cathay Pacific Logo
6:25 am - 10:30 amSEA-ADL
33h 35m2 stops
Cathay Pacific Logo
12:00 pm - 2:55 pmADL-SEA
45h 25m2 stops
$1,811Cathay Pacific
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Fri, Nov 14 - Wed, Nov 26

Qantas Airways flights from State of Washington to Adelaide

Our best Qantas Airways deals on State of Washington to Adelaide flight tickets
Qantas Airways
Dec 5
PDX5:41 amPortland
35h 04m
2 stops
ADL11:15 amAdelaide
Dec 12
ADL8:55 pmAdelaide
44h 00m
2 stops
PDX10:25 pmPortland
$1,202
Find similar
Qantas Airways
Jan 11
PDX5:50 pmPortland
32h 05m
2 stops
ADL8:25 pmAdelaide
Jan 31
ADL6:05 amAdelaide
32h 59m
2 stops
PDX8:34 pmPortland
$1,210
Find similar
Qantas Airways
Dec 28
PDX6:20 amPortland
36h 50m
2 stops
ADL1:40 pmAdelaide
Jan 13
ADL6:35 amAdelaide
25h 36m
2 stops
PDX1:41 pmPortland
$1,236
Find similar

United Airlines flights from State of Washington to Adelaide

Our best United Airlines deals on State of Washington to Adelaide flight tickets
United Airlines
Nov 9
SEA7:28 pmSeattle/Tacoma Intl
24h 12m
2 stops
ADL2:10 pmAdelaide
Nov 23
ADL8:30 amAdelaide
26h 15m
2 stops
SEA4:15 pmSeattle/Tacoma Intl
$1,608
Find similar
United Airlines
Nov 10
SEA12:00 pmSeattle/Tacoma Intl
31h 40m
3 stops
ADL2:10 pmAdelaide
Nov 25
ADL6:10 amAdelaide
25h 58m
2 stops
SEA1:38 pmSeattle/Tacoma Intl
$1,611
Find similar
United Airlines
Nov 8
SEA11:59 pmSeattle/Tacoma Intl
40h 26m
2 stops
ADL10:55 amAdelaide
Nov 23
ADL8:30 amAdelaide
28h 25m
2 stops
SEA6:25 pmSeattle/Tacoma Intl
$1,626
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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 October 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

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 3/15

8:00 pm-1:55 pm

2 stops24h 25m

Adelaide

Thu 3/19

6:10 am-9:31 am

2 stops20h 51m

$1,181

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 3/15

5:50 am-1:55 pm

2 stops38h 35m

Adelaide

Thu 3/19

6:10 am-9:31 am

2 stops20h 51m

$1,182

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Fri 12/5

5:41 am-11:15 am

2 stops35h 04m

Adelaide

Fri 12/12

8:55 pm-10:25 pm

2 stops44h 00m

$1,202

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 1/11

5:50 pm-8:25 pm

2 stops32h 05m

Adelaide

Sat 1/31

6:05 am-8:34 pm

2 stops32h 59m

$1,210

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 11/11

4:30 pm-10:55 am

2 stops23h 55m

Adelaide

Tue 11/25

11:40 am-11:57 pm

2 stops30h 47m

$1,444

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 11/13

4:05 pm-5:05 pm

1 stop30h 30m

Adelaide

Mon 11/24

10:00 pm-11:40 am

1 stop32h 10m

$1,509

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 11/13

4:05 pm-5:05 pm

1 stop30h 30m

Adelaide

Sun 11/23

12:35 pm-11:40 am

2 stops41h 35m

$1,549

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 11/11

5:57 pm-10:30 am

2 stops46h 03m

Adelaide

Tue 11/25

2:25 pm-3:46 pm

3 stops43h 51m

$1,551

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 11/13

5:30 pm-10:30 am

2 stops46h 30m

Adelaide

Wed 11/26

12:00 pm-2:55 pm

2 stops45h 25m

$1,592

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 11/14

6:25 am-10:30 am

2 stops33h 35m

Adelaide

Wed 11/26

12:00 pm-2:55 pm

2 stops45h 25m

$1,811

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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

Direct flights

None
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
922 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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