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$532+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Sep 10 — Sep 171
Wed 9/10
Wed 9/17
1 adult, Economy
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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 5, 2025.

Round-trip from

$995
(Air Canada)

One-way from

$532
(Qantas Airways)

Popular in

January

Cheapest in

November

Average price

$1,555
From Washington to Adelaide
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One-way flight from Washington to Adelaide
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Highest demand for flights based on searches. 17% potential increase in price ($305 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($73 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 5, 2025.

This Expedia deal was found by Cheapflights users on 9/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/185:59 pmSEA - ADL
2 stops44h 31mMultiple Airlines
Sat 10/256:25 amADL - SEA
2 stops35h 11mMultiple Airlines
Deal found 9/2$1,083
This Qantas Airways deal was found by Cheapflights users on 9/3. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/305:36 pmPDX - ADL
2 stops24h 14mQantas Airways
Tue 10/286:00 amADL - PDX
2 stops25h 20mQantas Airways
Deal found 9/3$1,187
This Expedia deal was found by Cheapflights users on 9/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/82:50 pmPDX - ADL
2 stops28h 00mMultiple Airlines
Sat 9/135:15 pmADL - PDX
2 stops39h 45mMultiple Airlines
Deal found 9/4$1,198
This Gotogate deal was found by Cheapflights users on 9/4. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/193:25 pmPDX - ADL
2 stops29h 00mMultiple Airlines
Sun 10/266:00 amADL - PDX
2 stops20h 45mMultiple Airlines
Deal found 9/4$1,246
This Air Canada deal was found by Cheapflights users on 9/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/197:40 pmPDX - ADL
2 stops33h 20mAir Canada
Sun 10/269:40 pmADL - PDX
2 stops29h 05mAir Canada
Deal found 9/4$1,272
This Air Canada deal was found by Cheapflights users on 9/3. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/218:00 pmSEA - ADL
2 stops25h 50mAir Canada
Sat 11/296:00 amADL - SEA
2 stops22h 01mAir Canada
Deal found 9/3$1,427
This United Airlines deal was found by Cheapflights users on 9/4. 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 12/2811:59 pmPDX - ADL
2 stops39h 01mUnited Airlines
Tue 1/137:15 amADL - PDX
2 stops26h 01mUnited Airlines
Deal found 9/4$1,504
This United Airlines deal was found by Cheapflights users on 9/2. 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.
Sat 10/187:00 amSEA - ADL
2 stops35h 20mUnited Airlines
Sat 10/256:00 amADL - SEA
3 stops32h 45mUnited Airlines
Deal found 9/2$1,540
This Air Canada deal was found by Cheapflights users on 9/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/73:25 pmPDX - ADL
2 stops29h 00mAir Canada
Tue 10/286:10 amADL - PDX
2 stops29h 50mAir Canada
Deal found 9/4$1,602
This United Airlines deal was found by Cheapflights users on 9/3. 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.
Tue 9/305:30 amPDX - ADL
3 stops36h 55mUnited Airlines
Tue 10/288:30 amADL - PDX
2 stops23h 46mUnited Airlines
Deal found 9/3$1,622
This oojo deal was found by Cheapflights users on 9/2. 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.
Sat 10/184:30 pmSEA - ADL
1 stop30h 50mQatar Airways
Sat 10/256:20 pmADL - SEA
2 stops35h 50mQatar Airways
Deal found 9/2$1,629
This Air Canada deal was found by Cheapflights users on 9/3. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/107:15 pmSEA - ADL
2 stops32h 45mAir Canada
Wed 10/156:10 amADL - SEA
2 stops20h 41mAir Canada
Deal found 9/3$1,668

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 5, 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 10/18

5:59 pm-8:00 am

2 stops44h 31m

Adelaide

Sat 10/25

6:25 am-12:06 am

2 stops35h 11m

$1,083

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Tue 9/30

5:36 pm-10:20 am

2 stops24h 14m

Adelaide

Tue 10/28

6:00 am-1:50 pm

2 stops25h 20m

$1,187

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 10/19

3:25 pm-1:55 pm

2 stops29h 00m

Adelaide

Sun 10/26

6:00 am-9:15 am

2 stops20h 45m

$1,246

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 10/19

7:40 pm-10:30 pm

2 stops33h 20m

Adelaide

Sun 10/26

9:40 pm-9:15 am

2 stops29h 05m

$1,272

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 11/21

8:00 pm-4:20 pm

2 stops25h 50m

Adelaide

Sat 11/29

6:00 am-9:31 am

2 stops22h 01m

$1,427

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 12/28

11:59 pm-9:30 am

2 stops39h 01m

Adelaide

Tue 1/13

7:15 am-2:46 pm

2 stops26h 01m

$1,504

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 10/18

7:00 am-11:50 am

2 stops35h 20m

Adelaide

Sat 10/25

6:00 am-9:15 pm

3 stops32h 45m

$1,540

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Tue 10/7

3:25 pm-1:55 pm

2 stops29h 00m

Adelaide

Tue 10/28

6:10 am-6:30 pm

2 stops29h 50m

$1,602

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 10/18

4:30 pm-4:50 pm

1 stop30h 50m

Adelaide

Sat 10/25

6:20 pm-12:40 pm

2 stops35h 50m

$1,629

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 10/10

7:15 pm-9:30 pm

2 stops32h 45m

Adelaide

Wed 10/15

6:10 am-9:21 am

2 stops20h 41m

$1,668

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/3

Showing 1-10 of 20 results
1
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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 September 5, 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 $1,187, Qantas Airways can have you in Adelaide from State of Washington in 24h 14m. 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.

  • 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

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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 September 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,164FlexibilityNo cancel feeOn-time74%

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