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Adelaide

$607+ Cheap flights from Washington to Adelaide (ADL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/28. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Nov 23 — Nov 301
Sun 11/23
Sun 11/30
1 adult, Economy
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Find flight deals from Washington to Adelaide

Cheapest flights from Washington to Adelaide
Explore the most affordable flight options available from Washington to Adelaide. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 24, 2025.

This Gurufare deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:20 amPDX - ADL
2 stops36h 50mQantas Airways
Tue 1/137:50 amADL - PDX
2 stops27h 29mQantas Airways
Deal found 10/22$1,237
This Qantas Airways deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/56:05 amSEA - ADL
2 stops36h 25mQantas Airways
Tue 11/117:00 pmADL - SEA
2 stops43h 28mQantas Airways
Deal found 10/23$1,383
This Qantas Airways deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/106:20 amSEA - ADL
2 stops36h 10mQantas Airways
Wed 11/266:00 amADL - SEA
2 stops30h 41mQantas Airways
Deal found 10/22$1,431
This Qantas Airways deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/106:20 amSEA - ADL
2 stops37h 25mQantas Airways
Mon 11/2412:35 pmADL - SEA
2 stops26h 18mQantas Airways
Deal found 10/22$1,432
This Orbitz deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/114:30 pmSEA - ADL
2 stops23h 55mMultiple Airlines
Tue 11/2511:40 amADL - SEA
2 stops30h 47mMultiple Airlines
Deal found 10/22$1,444
This Qantas Airways deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/106:20 amSEA - ADL
2 stops42h 45mQantas Airways
Fri 11/286:00 amADL - SEA
2 stops30h 41mQantas Airways
Deal found 10/22$1,451
This Qantas Airways deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/96:20 amSEA - ADL
2 stops36h 55mQantas Airways
Wed 11/266:00 amADL - SEA
2 stops30h 41mQantas Airways
Deal found 10/22$1,478
This Qantas Airways deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/96:20 amSEA - ADL
2 stops36h 55mQantas Airways
Mon 11/2412:35 pmADL - SEA
2 stops26h 18mQantas Airways
Deal found 10/22$1,479
This Qantas Airways deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/96:20 amSEA - ADL
2 stops35h 00mQantas Airways
Fri 11/286:25 amADL - SEA
2 stops30h 16mQantas Airways
Deal found 10/22$1,498
This Ovago deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/134:05 pmSEA - ADL
1 stop30h 30mQatar Airways
Mon 11/2410:00 pmADL - SEA
1 stop32h 10mQatar Airways
Deal found 10/22$1,509
This United Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2811:59 pmPDX - ADL
2 stops39h 01mUnited Airlines
Tue 1/137:15 amADL - PDX
2 stops26h 10mUnited Airlines
Deal found 10/24$1,512
This Qantas Airways deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:20 amSEA - ADL
2 stops34h 05mQantas Airways
Fri 11/286:25 amADL - SEA
2 stops30h 16mQantas Airways
Deal found 10/22$1,518

Cheap flight deals from Washington to Adelaide

Keep the following information in mind while searching for Washington to Adelaide flight deals. Data was last updated October 24, 2025.

Most accurate provider

Gurufare
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$1,181
(Air Canada)

One-way from

$607
(Qantas Airways)

Popular in

January

Cheapest in

September
Provider with most accurate pricing for Seattle/Tacoma Intl-Adelaide flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Adelaide flights.
Search Deals
From Washington to Adelaide
Search Deals
One-way flight from Washington to Adelaide
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($273 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($86 potential savings vs. average RT price).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from 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, Cheapflights users made 2,558,603 searches. Data last updated October 24, 2025.
Use the filters below to find and compare flights from Washington to Adelaide that are best for you.

Fly from

Washington

Fly to

Adelaide

Route

Depart

Return

Price

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

Wed 11/5

6:05 am-6:00 pm

2 stops41h 25m

Adelaide

Wed 11/12

7:05 am-7:58 pm

2 stops31h 23m

$1,383

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 11/5

6:05 am-1:00 pm

2 stops36h 25m

Adelaide

Tue 11/11

7:00 pm-7:58 pm

2 stops43h 28m

$1,383

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 11/10

6:20 am-1:00 pm

2 stops36h 10m

Adelaide

Wed 11/26

6:00 am-6:11 pm

2 stops30h 41m

$1,431

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 11/10

6:20 am-3:25 pm

2 stops38h 35m

Adelaide

Tue 11/25

7:00 pm-6:11 pm

2 stops41h 41m

$1,431

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 11/10

6:20 am-9:50 am

2 stops33h 00m

Adelaide

Thu 11/27

2:30 pm-8:23 pm

2 stops48h 23m

$1,451

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 12/28

11:59 pm-9:30 am

2 stops39h 01m

Adelaide

Tue 1/13

7:15 am-2:55 pm

2 stops26h 10m

$1,512

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 11/13

4:05 pm-5:05 pm

1 stop30h 30m

Adelaide

Sun 11/23

10:00 pm-11:40 am

1 stop32h 10m

$1,549

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 11/5

6:05 am-1:00 pm

2 stops36h 25m

Adelaide

Sat 11/15

6:25 am-6:11 pm

2 stops30h 16m

$1,571

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 11/5

6:05 am-6:00 pm

2 stops41h 25m

Adelaide

Mon 11/17

8:00 pm-1:02 pm

2 stops35h 32m

$1,571

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Showing 1-10 of 19 results
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Best time to book a flight from Washington to Adelaide

Have a flexible travel schedule? Discover the best time to fly to Adelaide from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Adelaide

What is the cheapest time of day to fly from WA to ADL?

Find hourly flight availability from Washington to Adelaide. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 24, 2025.

One of the essential ways to save on airfare from State of Washington to Adelaide is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 34% on airfare.

Related info for your journey

Find useful and relevant information for your journey from Washington to Adelaide. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Adelaide from Washington?

    Located just 4.1 mi from the city center, Adelaide (ADL) is the airport most travelers will use when flying to Adelaide from Washington.

  • How long is the flight from State of Washington to Adelaide?

    For as low as $1,237, Qantas Airways can have you in Adelaide from State of Washington in 36h 50m. There are 8275 mi between State of Washington and Adelaide. This flight may include one or multiple stops.

  • Can I find deals for flights from Washington to Adelaide that include hotel bookings?

    Yes. In addition to deals on Washington to Adelaide flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Adelaide?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Adelaide.

  • Can I find deals for business class flights from Washington to Adelaide?

    Yes. Cheapflights offers flight deals from Washington to Adelaide by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Adelaide?

Book flights to Adelaide if you plan to visit one of these locations
Glenelg

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Top airline flying from Washington to Adelaide

Discover the top airline that operate flights from Washington to Adelaide. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,166FlexibilityNo cancel feeOn-time74%

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