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$577+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Dec 18 — Dec 251
Thu 12/18
Thu 12/25
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 November 18, 2025.

This oojo deal was found by Cheapflights users on 11/16. 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 stops45h 15mQantas Airways
Tue 1/136:30 pmADL - PDX
2 stops37h 35mQantas Airways
Deal found 11/16$1,238
This United Airlines deal was found by Cheapflights users on 11/16. 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.
Mon 12/299:00 amPDX - ADL
2 stops30h 00mUnited Airlines
Wed 1/72:55 pmADL - PDX
1 stop18h 23mUnited Airlines
Deal found 11/16$1,404
This United Airlines deal was found by Cheapflights users on 11/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/283:54 pmPDX - ADL
2 stops27h 46mUnited Airlines
Tue 1/136:00 amADL - PDX
3 stops31h 26mUnited Airlines
Deal found 11/18$1,935
This Gotogate deal was found by Cheapflights users on 11/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/293:54 pmPDX - ADL
2 stops24h 31mAir New Zealand
Wed 1/76:00 amADL - PDX
3 stops31h 00mAir New Zealand
Deal found 11/16$2,267
This Bookaflight.co.il deal was found by Cheapflights users on 11/18. 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 Bookaflight.co.il is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:26 pmPDX - ADL
2 stops28h 49mMultiple Airlines
Thu 1/17:50 amADL - PDX
2 stops24h 24mMultiple Airlines
Deal found 11/18$2,329
This United Airlines deal was found by Cheapflights users on 11/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/253:54 pmPDX - ADL
1 stop23h 06mUnited Airlines
Thu 1/16:10 amADL - PDX
2 stops35h 06mUnited Airlines
Deal found 11/18$2,398
This Mytrip deal was found by Cheapflights users on 11/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3112:10 amSEA - ADL
3 stops35h 35mMultiple Airlines
Thu 1/86:15 amADL - SEA
3 stops34h 21mMultiple Airlines
Deal found 11/16$2,626
This Mytrip deal was found by Cheapflights users on 11/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2110:05 amSEA - ADL
3 stops35h 10mMultiple Airlines
Fri 1/24:10 pmADL - SEA
3 stops35h 51mMultiple Airlines
Deal found 11/18$3,483
This Ovago deal was found by Cheapflights users on 11/18. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/217:12 pmSEA - ADL
2 stops45h 13mAir New Zealand
Fri 1/211:55 amADL - SEA
2 stops25h 20mAir New Zealand
Deal found 11/18$3,840

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 November 18, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$1,037
(Travelocity)

One-way from

$577
(oojo)

Popular in

January

Cheapest in

September

Average price

$1,088
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 ($87 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 18, 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

Sat 2/14

8:00 pm-7:00 pm

2 stops28h 30m

Adelaide

Sat 2/21

6:10 am-7:16 pm

2 stops31h 36m

$1,037

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 3/15

8:00 pm-12:35 pm

2 stops23h 05m

Adelaide

Thu 3/19

6:10 am-3:01 pm

2 stops26h 21m

$1,037

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 2/27

8:00 pm-10:30 pm

2 stops32h 00m

Adelaide

Sun 3/15

6:10 am-7:16 pm

2 stops30h 36m

$1,042

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 3/15

10:05 am-1:55 pm

2 stops34h 20m

Adelaide

Thu 3/19

6:10 am-10:06 pm

2 stops33h 26m

$1,182

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Thu 1/22

5:50 pm-1:40 pm

2 stops25h 20m

Adelaide

Tue 2/3

7:50 am-1:41 pm

2 stops24h 21m

$1,209

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Thu 1/22

10:52 am-5:45 pm

2 stops36h 23m

Adelaide

Fri 2/6

7:50 am-4:49 pm

2 stops27h 29m

$1,209

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Thu 1/22

3:50 pm-9:30 am

1 stop23h 10m

Adelaide

Sat 2/7

2:55 pm-12:39 am

1 stop28h 14m

$1,212

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 1/26

3:50 pm-9:30 am

1 stop23h 10m

Adelaide

Wed 2/4

2:55 pm-11:06 pm

1 stop26h 41m

$1,212

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 2/14

9:19 am-9:30 am

1 stop29h 41m

Adelaide

Sat 2/21

2:55 pm-6:27 pm

1 stop22h 02m

$1,212

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 1/25

11:59 pm-9:30 am

2 stops39h 01m

Adelaide

Wed 2/4

2:55 pm-2:48 pm

1 stop18h 23m

$1,216

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/17

Showing 1-10 of 24 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 November 18, 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 $1,212, Air Canada can have you in Adelaide from State of Washington in 23h 10m. 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 November 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,166FlexibilityNo cancel feeOn-time74%

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