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$496+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
jul. 6 — jul. 131
dom. 7/6
dom. 7/13
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 julio 1, 2025.

Round-trip from

$1,058
(Trip.com)

One-way from

$496
(Qantas Airways)

Popular in

January

Cheapest in

March

Average price

$1,210
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. 18% potential increase in price ($335 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($70 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 1, 2025.

This Trip.com deal was found by Cheapflights users on 6/30. 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.
jue. 8/146:55 pmSEA - ADL
2 stops34h 35mMultiple Airlines
jue. 8/216:25 amADL - SEA
2 stops30h 29mMultiple Airlines
Deal found 6/30$1,058
This Qantas Airways deal was found by Cheapflights users on 6/30. 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.
mar. 8/125:55 pmSEA - ADL
2 stops23h 55mQantas Airways
mar. 8/194:55 pmADL - SEA
2 stops21h 40mQantas Airways
Deal found 6/30$1,061
This Trip.com deal was found by Cheapflights users on 6/29. 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.
mié. 8/133:40 pmPDX - ADL
2 stops37h 50mMultiple Airlines
mié. 8/205:15 pmADL - PDX
2 stops35h 58mMultiple Airlines
Deal found 6/29$1,078
This Gurufare deal was found by Cheapflights users on 6/30. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/1412:31 pmPDX - ADL
2 stops33h 14mQantas Airways
jue. 8/2112:45 pmADL - PDX
2 stops24h 59mQantas Airways
Deal found 6/30$1,194
This United Airlines deal was found by Cheapflights users on 6/30. 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.
vie. 7/412:40 pmSEA - ADL
2 stops29h 45mUnited Airlines
vie. 8/156:05 amADL - SEA
2 stops29h 23mUnited Airlines
Deal found 6/30$1,266
This United Airlines deal was found by Cheapflights users on 6/30. 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.
dom. 12/2811:55 pmPDX - ADL
2 stops39h 05mUnited Airlines
lun. 1/122:55 pmADL - PDX
2 stops26h 13mUnited Airlines
Deal found 6/30$1,392
This Jetabroad deal was found by Cheapflights users on 6/30. 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.
jue. 8/149:40 pmPDX - ADL
3 stops44h 10mHawaiian Airlines
jue. 8/219:30 amADL - PDX
2 stops29h 40mHawaiian Airlines
Deal found 6/30$1,466
This Jetabroad deal was found by Cheapflights users on 6/29. 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.
mié. 11/195:40 pmPDX - ADL
3 stops30h 05mFiji Airways
mié. 12/109:00 amADL - PDX
3 stops28h 08mFiji Airways
Deal found 6/29$1,601
This Jetabroad deal was found by Cheapflights users on 6/30. 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.
jue. 8/145:14 pmSEA - ADL
3 stops28h 31mAir New Zealand
jue. 8/217:00 pmADL - SEA
2 stops35h 00mAir New Zealand
Deal found 6/30$1,713
This Fiji Airways deal was found by Cheapflights users on 6/30. 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 Fiji Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 7/56:25 pmSEA - ADL
2 stops24h 40mFiji Airways
lun. 8/2512:35 pmADL - SEA
2 stops25h 28mFiji Airways
Deal found 6/30$1,776
This oojo deal was found by Cheapflights users on 6/29. 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.
mié. 11/2610:40 amPDX - ADL
3 stops49h 25mQatar Airways
dom. 12/1410:00 pmADL - PDX
2 stops41h 09mQatar Airways
Deal found 6/29$2,398

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 julio 1, 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

jue. 8/14

6:55 pm-10:00 pm

2 stops34h 35m

Adelaide

jue. 8/21

6:25 am-8:24 pm

2 stops30h 29m

$1,058

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

mar. 8/12

5:55 pm-10:20 am

2 stops23h 55m

Adelaide

mar. 8/19

4:55 pm-10:05 pm

2 stops21h 40m

$1,061

PortlandAdelaide

PDX - ADL

PDXADL

Portland

mié. 8/13

3:40 pm-10:00 pm

2 stops37h 50m

Adelaide

mié. 8/20

5:15 pm-12:43 pm

2 stops35h 58m

$1,078

PortlandAdelaide

PDX - ADL

PDXADL

Portland

jue. 8/14

12:31 pm-2:15 pm

2 stops33h 14m

Adelaide

jue. 8/21

12:45 pm-9:14 pm

2 stops24h 59m

$1,194

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

mar. 8/12

12:40 pm-11:05 am

2 stops29h 55m

Adelaide

mar. 8/19

8:00 pm-8:54 pm

3 stops41h 24m

$1,284

PortlandAdelaide

PDX - ADL

PDXADL

Portland

dom. 12/28

11:55 pm-9:30 am

2 stops39h 05m

Adelaide

lun. 1/12

2:55 pm-8:05 pm

1 stop23h 40m

$1,392

PortlandAdelaide

PDX - ADL

PDXADL

Portland

jue. 8/14

9:40 pm-10:20 am

3 stops44h 10m

Adelaide

jue. 8/21

9:30 am-10:40 pm

2 stops29h 40m

$1,466

PortlandAdelaide

PDX - ADL

PDXADL

Portland

mié. 11/19

5:40 pm-6:15 pm

3 stops30h 05m

Adelaide

mié. 12/10

9:00 am-6:38 pm

3 stops28h 08m

$1,601

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

mar. 8/12

5:14 pm-12:05 pm

3 stops26h 21m

Adelaide

mar. 8/19

6:30 am-6:36 pm

3 stops28h 36m

$1,616

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

vie. 7/11

4:30 pm-1:55 pm

2 stops28h 55m

Adelaide

jue. 8/28

4:30 pm-2:25 pm

2 stops38h 25m

$2,008

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 19 results
1
2

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 julio 1, 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.

Reviews of airlines servicing Adelaide

Get insights into the airlines that provide service to Adelaide. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Adelaide. Reviews last updated julio 1, 2025.
Peruse reviews from past customers who have flown with Singapore Airlines, Fiji Airways, and Air New Zealand from Washington to Adelaide to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very good
1,320 reviews

Boarding

8.2

Crew

8.6

Entertainment

8.0

Overall

8.1

Food

7.7

Comfort

7.9

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Singapore Airlines
8.1
Very good
1,320 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Boarding

8.2

Crew

8.6

Entertainment

8.0

Overall

8.1

Food

7.7

Comfort

7.9

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Fiji Airways
8.0
Very good
202 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Boarding

8.2

Crew

8.6

Entertainment

8.0

Overall

8.1

Food

7.7

Comfort

7.9

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Air New Zealand
8.0
Very good
486 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Boarding

8.2

Crew

8.6

Entertainment

8.0

Overall

8.1

Food

7.7

Comfort

7.9

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Hawaiian Airlines
7.8
Good
2,539 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Boarding

8.2

Crew

8.6

Entertainment

8.0

Overall

8.1

Food

7.7

Comfort

7.9

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Qantas Airways
7.5
Good
870 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Boarding

8.2

Crew

8.6

Entertainment

8.0

Overall

8.1

Food

7.7

Comfort

7.9

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

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.

  • What are the cheapest airlines to fly from State of Washington to Adelaide one-way?

    The cheapest airlines for a one-way flight from State of Washington to Adelaide are Qantas Airways ($496), Singapore Airlines ($1,326), and Qatar Airways ($1,364).

  • 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 Washington?

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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 julio 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,236FlexibilityNo cancel feeOn-time74%

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