HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Adelaide

$581+ 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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
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

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 4, 2025.

This Qantas Airways deal was found by Cheapflights users on 12/1. 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 12/45:41 pmPDX - ADL
2 stops29h 34mQantas Airways
Mon 12/87:50 amADL - PDX
2 stops28h 08mQantas Airways
Deal found 12/1$1,209
This Alaska Airlines deal was found by Cheapflights users on 12/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:00 amPDX - ADL
2 stops40h 45mAlaska Airlines
Mon 12/88:00 pmADL - PDX
2 stops51h 55mAlaska Airlines
Deal found 12/3$1,210
This Qantas Airways deal was found by Cheapflights users on 12/2. 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 12/285:41 pmPDX - ADL
2 stops24h 49mMultiple Airlines
Tue 1/137:50 amADL - PDX
2 stops24h 21mMultiple Airlines
Deal found 12/2$1,265
This oojo deal was found by Cheapflights users on 12/3. 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.
Fri 12/56:25 amSEA - ADL
2 stops36h 05mQantas Airways
Tue 12/97:00 pmADL - SEA
2 stops44h 05mQantas Airways
Deal found 12/3$1,291
This FlightHub deal was found by Cheapflights users on 12/3. 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.
Sun 12/284:26 pmPDX - ADL
2 stops26h 44mQantas Airways
Tue 1/137:50 amADL - PDX
2 stops24h 21mQantas Airways
Deal found 12/3$1,302
This Jetabroad deal was found by Cheapflights users on 12/3. 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.
Fri 12/56:59 pmSEA - ADL
2 stops29h 21mMultiple Airlines
Tue 12/97:00 pmADL - SEA
3 stops37h 54mMultiple Airlines
Deal found 12/3$1,531
This United Airlines deal was found by Cheapflights users on 12/3. 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.
Wed 12/315:02 amSEA - ADL
2 stops57h 58mUnited Airlines
Wed 1/72:55 pmADL - SEA
2 stops24h 50mUnited Airlines
Deal found 12/3$1,573
This United Airlines deal was found by Cheapflights users on 12/4. 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 12/2811:55 pmPDX - ADL
2 stops39h 05mUnited Airlines
Tue 1/136:00 amADL - PDX
3 stops31h 26mUnited Airlines
Deal found 12/4$1,702
This Mytrip deal was found by Cheapflights users on 12/2. 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.
Tue 12/309:50 amPDX - ADL
3 stops31h 10mMultiple Airlines
Tue 1/64:25 pmADL - PDX
3 stops44h 35mMultiple Airlines
Deal found 12/2$2,032
This oojo deal was found by Cheapflights users on 12/2. 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.
Tue 12/304:26 pmPDX - ADL
2 stops26h 44mQantas Airways
Tue 1/62:25 pmADL - PDX
2 stops41h 46mQantas Airways
Deal found 12/2$2,149
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Tue 12/303:54 pmPDX - ADL
2 stops27h 46mUnited Airlines
Tue 1/69:30 amADL - PDX
3 stops51h 56mUnited Airlines
Deal found 12/2$2,451
This Rumbo deal was found by Cheapflights users on 12/3. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:05 pmSEA - ADL
1 stop30h 30mMultiple Airlines
Wed 1/710:15 amADL - SEA
1 stop39h 25mMultiple Airlines
Deal found 12/3$2,743

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 4, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$945
(Air Canada)

One-way from

$581
(Kiwi.com)

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. 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 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 4, 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

Tue 1/27

7:00 pm-4:20 pm

2 stops26h 50m

Adelaide

Tue 2/10

6:10 am-2:40 pm

2 stops27h 00m

$945

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/1

8:00 pm-7:10 pm

2 stops28h 40m

Adelaide

Wed 2/11

6:10 am-10:06 pm

2 stops34h 26m

$1,032

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 1/28

8:00 pm-10:30 pm

2 stops32h 00m

Adelaide

Sun 2/8

6:10 am-2:31 pm

2 stops26h 51m

$1,032

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 1/28

10:05 am-10:30 pm

2 stops41h 55m

Adelaide

Wed 2/11

6:10 am-7:16 pm

2 stops31h 36m

$1,032

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/1

8:00 pm-1:55 pm

2 stops23h 25m

Adelaide

Mon 2/9

6:00 am-9:31 am

2 stops22h 01m

$1,036

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 1/30

8:00 pm-6:50 pm

2 stops28h 20m

Adelaide

Sat 2/7

6:10 am-2:31 pm

2 stops26h 51m

$1,048

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/1

8:00 pm-1:55 pm

2 stops23h 25m

Adelaide

Fri 2/6

6:10 am-9:31 am

2 stops21h 51m

$1,082

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/2

8:00 pm-1:55 pm

2 stops23h 25m

Adelaide

Fri 2/6

6:10 am-9:31 am

2 stops21h 51m

$1,082

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 1/19

8:30 am-9:30 am

2 stops30h 30m

Adelaide

Mon 1/26

2:55 pm-2:46 pm

1 stop18h 21m

$1,103

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 1/18

8:00 pm-10:30 pm

2 stops32h 00m

Adelaide

Sun 1/25

6:10 am-9:31 am

2 stops21h 51m

$1,115

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 33 results
1
2
3
4

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 4, 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 $945, Air Canada can have you in Adelaide from State of Washington in 26h 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

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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,166FlexibilityNo 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.