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$609+ 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
Jan 20 — Jan 271
Tue 1/20
Tue 1/27
1 adult, Economy
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Cheap 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 December 21, 2025.

This oojo deal was found by Cheapflights users on 12/21. 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 oojo 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 1/136:35 amADL - PDX
2 stops25h 36mQantas Airways
Deal found 12/21$1,167
This United Airlines deal was found by Cheapflights users on 12/19. 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 12/287:00 amPDX - ADL
2 stops33h 25mUnited Airlines
Tue 1/136:00 amADL - PDX
3 stops31h 26mUnited Airlines
Deal found 12/19$1,700
This oojo deal was found by Cheapflights users on 12/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/222:50 pmSEA - ADL
2 stops30h 25mQantas Airways
Wed 12/247:00 pmADL - SEA
2 stops41h 40mQantas Airways
Deal found 12/18$2,381
This Jetabroad deal was found by Cheapflights users on 12/18. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/224:05 pmSEA - ADL
1 stop30h 30mMultiple Airlines
Wed 12/248:25 pmADL - SEA
2 stops33h 45mMultiple Airlines
Deal found 12/18$3,005
This oojo deal was found by Cheapflights users on 12/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/224:05 pmSEA - ADL
1 stop30h 30mQatar Airways
Wed 12/2410:00 pmADL - SEA
1 stop32h 10mQatar Airways
Deal found 12/18$3,080

Find flight deals from Washington to Adelaide

Keep the following information in mind while searching for Washington to Adelaide flight deals. Data was last updated December 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$964
(Air Canada)

One-way from

$609
(Qantas Airways)

Popular in

January

Cheapest in

September

Average price

$1,274
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. 14% potential increase in price ($234 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($90 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 21, 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

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

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 2/9

7:05 pm-6:00 pm

2 stops28h 25m

Adelaide

Thu 2/19

6:00 am-2:40 pm

2 stops27h 10m

$1,000

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/2

8:00 pm-3:25 pm

2 stops24h 55m

Adelaide

Mon 2/9

6:00 am-9:15 am

2 stops21h 45m

$1,005

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 2/3

8:00 pm-10:30 pm

2 stops32h 00m

Adelaide

Tue 2/10

6:10 am-9:15 am

2 stops21h 35m

$1,011

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Thu 2/19

3:15 pm-1:55 pm

2 stops28h 10m

Adelaide

Mon 2/23

6:10 am-6:30 pm

2 stops30h 50m

$1,084

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 2/21

8:00 pm-7:10 pm

2 stops28h 40m

Adelaide

Tue 2/24

7:55 pm-2:31 pm

2 stops37h 06m

$1,088

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/2

5:10 pm-9:30 am

1 stop21h 50m

Adelaide

Mon 2/9

2:55 pm-9:12 pm

1 stop24h 47m

$1,113

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 2/2

3:50 pm-9:30 am

1 stop23h 10m

Adelaide

Mon 2/9

2:55 pm-11:57 am

2 stops39h 32m

$1,117

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Fri 3/20

7:05 pm-12:40 pm

2 stops24h 05m

Adelaide

Mon 3/30

6:10 am-6:30 pm

2 stops29h 50m

$1,153

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 5/9

5:06 pm-11:35 am

2 stops25h 59m

Adelaide

Sat 5/16

12:35 pm-10:12 pm

2 stops26h 07m

$1,257

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 25 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 December 21, 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 $1,011, Air Canada can have you in Adelaide from State of Washington in 32h. There are 8332 mi between State of Washington and Adelaide.

  • 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 December 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,166FlexibilityNo cancel feeOn-time74%

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