HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Adelaide

$653+ 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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Adelaide with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 September 17, 2025.

Round-trip from

$1,059
(Trip.com)

One-way from

$653
(Kiwi.com)

Popular in

January

Cheapest in

September

Average price

$1,088
From Washington to Adelaide
Search Deals
One-way flight from Washington to Adelaide
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($300 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($79 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 17, 2025.

This Priceline deal was found by Cheapflights users on 9/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/244:59 pmSEA - ADL
2 stops26h 36mQantas Airways
Wed 10/1512:45 pmADL - SEA
2 stops24h 52mQantas Airways
Deal found 9/15$1,046
This Trip.com deal was found by Cheapflights users on 9/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/247:44 amSEA - ADL
2 stops31h 31mMultiple Airlines
Sat 11/227:45 amADL - SEA
2 stops34h 02mMultiple Airlines
Deal found 9/17$1,059
This FlightHub deal was found by Cheapflights users on 9/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/249:15 pmSEA - ADL
2 stops45h 50mMultiple Airlines
Mon 11/241:15 pmADL - SEA
2 stops23h 13mMultiple Airlines
Deal found 9/17$1,085
This oojo deal was found by Cheapflights users on 9/17. 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.
Sat 11/17:40 amSEA - ADL
2 stops33h 45mQantas Airways
Sat 11/811:40 amADL - SEA
2 stops25h 01mQantas Airways
Deal found 9/17$1,089
This Trip.com deal was found by Cheapflights users on 9/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/302:50 pmPDX - ADL
2 stops27h 55mMultiple Airlines
Thu 11/61:15 pmADL - PDX
2 stops26h 05mMultiple Airlines
Deal found 9/14$1,109
This Jetabroad deal was found by Cheapflights users on 9/14. 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 9/225:59 pmSEA - ADL
2 stops25h 36mMultiple Airlines
Mon 9/2912:45 pmADL - SEA
2 stops24h 09mMultiple Airlines
Deal found 9/14$1,144
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 12/131:05 pmSEA - ADL
1 stop25h 55mUnited Airlines
Mon 1/52:55 pmADL - SEA
1 stop24h 42mUnited Airlines
Deal found 9/15$1,210
This Fareboom deal was found by Cheapflights users on 9/16. 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 Fareboom is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2410:30 amPDX - ADL
2 stops51h 15mMultiple Airlines
Thu 1/1511:55 amADL - PDX
2 stops29h 41mMultiple Airlines
Deal found 9/16$1,232
This Trip.com deal was found by Cheapflights users on 9/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/317:09 amPDX - ADL
2 stops31h 36mMultiple Airlines
Fri 11/75:10 pmADL - PDX
2 stops22h 34mMultiple Airlines
Deal found 9/16$1,249
This oojo deal was found by Cheapflights users on 9/15. 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.
Thu 9/255:35 pmPDX - ADL
2 stops30h 10mQantas Airways
Sat 10/184:55 pmADL - PDX
2 stops45h 05mQantas Airways
Deal found 9/15$1,280
This United Airlines deal was found by Cheapflights users on 9/17. 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.
Fri 10/2411:10 pmSEA - ADL
2 stops42h 15mUnited Airlines
Mon 11/246:00 amADL - SEA
3 stops33h 21mUnited Airlines
Deal found 9/17$1,285
This Expedia deal was found by Cheapflights users on 9/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/277:09 amPDX - ADL
2 stops37h 16mMultiple Airlines
Wed 11/52:45 pmADL - PDX
2 stops42h 30mMultiple Airlines
Deal found 9/17$1,315

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 September 17, 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 9/24

4:59 pm-12:05 pm

2 stops26h 36m

Adelaide

Wed 10/15

12:45 pm-8:07 pm

2 stops24h 52m

$1,046

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 10/24

7:44 am-8:45 am

2 stops31h 31m

Adelaide

Sat 11/22

7:45 am-11:17 pm

2 stops34h 02m

$1,059

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 11/1

7:40 am-10:55 am

2 stops33h 45m

Adelaide

Sat 11/8

11:40 am-6:11 pm

2 stops25h 01m

$1,089

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Thu 10/30

2:50 pm-12:15 pm

2 stops27h 55m

Adelaide

Thu 11/6

1:15 pm-8:50 pm

2 stops26h 05m

$1,109

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 12/15

7:29 pm-9:30 am

1 stop19h 31m

Adelaide

Mon 1/5

2:55 pm-4:52 pm

1 stop20h 27m

$1,210

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 12/13

1:05 pm-9:30 am

1 stop25h 55m

Adelaide

Mon 1/5

2:55 pm-9:07 pm

1 stop24h 42m

$1,210

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 12/14

11:59 pm-9:30 am

2 stops39h 01m

Adelaide

Mon 1/5

2:55 pm-12:59 am

1 stop28h 34m

$1,215

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Fri 10/31

7:09 am-8:15 am

2 stops31h 36m

Adelaide

Fri 11/7

5:10 pm-9:14 pm

2 stops22h 34m

$1,249

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Thu 9/25

5:35 pm-4:15 pm

2 stops30h 10m

Adelaide

Sat 10/18

4:55 pm-8:30 pm

2 stops45h 05m

$1,280

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 10/24

11:10 pm-10:55 am

2 stops42h 15m

Adelaide

Sat 11/22

6:00 am-9:13 pm

3 stops33h 43m

$1,285

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 22 results
1
2
3

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 September 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from State of Washington to Adelaide as you normally would.

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 $1,210, Qantas Airways can have you in Adelaide from State of Washington in 19h 31m. There are 8332 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.

  • What is the cheapest month to book a flight from State of Washington to Adelaide?

    Currently, August is the cheapest month in which you can book a flight from State of Washington to Adelaide (average of $1,214). Flying from State of Washington to Adelaide in December is currently the most expensive (average of $2,057). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Adelaide?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,164FlexibilityNo cancel feeOn-time74%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.