Adelaide

$487+ 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 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Jul 8 — Jul 151
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 July 3, 2025.

Round-trip from

$1,042
(FlightHub)

One-way from

$487
(FlightHub)

Popular in

January

Cheapest in

March

Average price

$1,210
From Washington to Adelaide
One-way flight from Washington to Adelaide
Highest demand for flights based on searches. 18% potential increase in price ($335 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($70 potential savings vs. average RT price).
Average for round-trip flights in July 2025

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 July 3, 2025.

This FlightHub deal was found by Cheapflights users on 7/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/305:15 pmSEA - ADL
2 stops26h 20mQantas Airways
Wed 8/612:45 pmADL - SEA
2 stops23h 45mQantas Airways
Deal found 7/2$1,042
This Trip.com deal was found by Cheapflights users on 7/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/166:55 pmSEA - ADL
2 stops33h 35mMultiple Airlines
Sat 8/234:30 pmADL - SEA
2 stops45h 36mMultiple Airlines
Deal found 7/3$1,100
This Fiji Airways deal was found by Cheapflights users on 7/1. 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 Fiji Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/145:40 pmPDX - ADL
2 stops25h 25mMultiple Airlines
Thu 8/2112:35 pmADL - PDX
2 stops24h 25mMultiple Airlines
Deal found 7/1$1,196
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Fri 7/48:57 amSEA - ADL
3 stops33h 28mUnited Airlines
Fri 8/156:05 amADL - SEA
3 stops31h 22mUnited Airlines
Deal found 7/2$1,266
This Ovago deal was found by Cheapflights users on 7/1. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2612:30 pmPDX - ADL
2 stops28h 50mQantas Airways
Mon 12/1512:25 pmADL - PDX
2 stops28h 24mQantas Airways
Deal found 7/1$1,277
This American Airlines deal was found by Cheapflights users on 7/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/162:56 pmPDX - ADL
2 stops25h 59mAmerican Airlines
Sat 8/2312:45 pmADL - PDX
2 stops24h 59mAmerican Airlines
Deal found 7/2$1,292
This United Airlines deal was found by Cheapflights users on 7/1. 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 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 1/137:15 amADL - PDX
2 stops23h 42mUnited Airlines
Deal found 7/1$1,422
This FlightHub deal was found by Cheapflights users on 7/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/56:00 pmSEA - ADL
2 stops25h 05mFiji Airways
Thu 7/3112:35 pmADL - SEA
2 stops25h 01mFiji Airways
Deal found 7/2$1,428
This Jetabroad deal was found by Cheapflights users on 7/1. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/149:40 pmPDX - ADL
3 stops44h 10mHawaiian Airlines
Thu 8/218:55 amADL - PDX
2 stops30h 15mHawaiian Airlines
Deal found 7/1$1,533

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 July 3, 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 7/30

5:15 pm-12:05 pm

2 stops26h 20m

Adelaide

Wed 8/6

12:45 pm-8:00 pm

2 stops23h 45m

$1,042

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 8/16

6:55 pm-9:00 pm

2 stops33h 35m

Adelaide

Sat 8/23

4:30 pm-9:36 pm

2 stops45h 36m

$1,100

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Thu 8/14

5:40 pm-11:35 am

2 stops25h 25m

Adelaide

Thu 8/21

12:35 pm-8:30 pm

2 stops24h 25m

$1,196

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 7/9

5:14 pm-10:55 am

2 stops25h 11m

Adelaide

Sun 8/17

6:05 am-8:57 pm

3 stops31h 22m

$1,266

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sat 8/16

2:56 pm-9:25 am

2 stops25h 59m

Adelaide

Sat 8/23

12:45 pm-9:14 pm

2 stops24h 59m

$1,292

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Thu 8/14

9:40 pm-10:20 am

3 stops44h 10m

Adelaide

Thu 8/21

8:55 am-10:40 pm

2 stops30h 15m

$1,533

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/7

6:25 pm-11:35 am

3 stops48h 40m

Adelaide

Mon 8/25

12:35 pm-9:33 pm

2 stops25h 28m

$2,080

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 7/30

6:09 pm-12:05 pm

2 stops25h 26m

$487

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 8/17

2:32 pm-9:25 am

2 stops26h 23m

$557

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 8/17

6:15 pm-11:35 am

3 stops24h 50m

$599

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 13 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 July 3, 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 July 3, 2025.
Peruse reviews from past customers who have flown with Singapore Airlines, Hawaiian Airlines, and Qantas Airways 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.

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Entertainment

8.0

Boarding

8.2

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.

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Entertainment

8.0

Boarding

8.2

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.

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Entertainment

8.0

Boarding

8.2

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.

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Entertainment

8.0

Boarding

8.2

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.

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Entertainment

8.0

Boarding

8.2

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.

Comfort

7.9

Food

7.7

Overall

8.1

Crew

8.6

Entertainment

8.0

Boarding

8.2

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 ($487), American Airlines ($557), and Singapore Airlines ($1,326).

  • 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?

Book flights to Washington 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,236FlexibilityNo 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.