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Cheap flights from Washington to Adelaide from $1,567

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
17 oct. — 24 oct.1
1 adult
1 adult, Economy

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 17 septembre 2025.

Round-trip from

$1,566

Popular in

January

Cheapest in

September

Average price

$1,630
29/10-5/11
  • 29/10-5/11
  • 4 total stops
  • 72h 16m total
  • Washington to Adelaide
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($674 potential increase over avg. return price).
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Cheapest flight prices on average. 6% potential price decrease ($178 potential savings vs. average return price).
Search Deals
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 17 septembre 2025.

mer. 24/916:59SEA - ADL
2 stops26h 36mQantas Airways
mer. 15/1012:45ADL - SEA
2 stops24h 52mQantas Airways
Deal found 15/9$1,567
lun. 22/917:59SEA - ADL
2 stops25h 36mMultiple Airlines
lun. 29/912:45ADL - SEA
2 stops24h 09mMultiple Airlines
Deal found 14/9$1,714
sam. 13/1213:05SEA - ADL
1 stop25h 55mUnited Airlines
lun. 5/114:55ADL - SEA
1 stop24h 42mUnited Airlines
Deal found 15/9$1,813
ven. 12/1223:59SEA - ADL
2 stops39h 01mUnited Airlines
lun. 5/114:55ADL - SEA
2 stops37h 30mUnited Airlines
Deal found 15/9$2,345
jeu. 11/1215:25SEA - ADL
2 stops28h 15mUnited Airlines
lun. 5/114:55ADL - SEA
1 stop28h 34mUnited Airlines
Deal found 15/9$2,379
lun. 22/917:14SEA - ADL
2 stops24h 21mUnited Airlines
lun. 29/920:00ADL - SEA
3 stops41h 45mUnited Airlines
Deal found 14/9$2,424
sam. 13/1209:25SEA - ADL
1 stop29h 35mUnited Airlines
sam. 3/114:55ADL - SEA
1 stop28h 34mUnited Airlines
Deal found 15/9$2,504
mar. 23/900:30SEA - ADL
2 stops39h 40mMultiple Airlines
mer. 15/1020:00ADL - SEA
2 stops35h 46mMultiple Airlines
Deal found 15/9$2,619

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 17 septembre 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

dim. 15/3

15:40-13:55

2 stops28h 45m

Adelaide

jeu. 19/3

06:10-22:06

2 stops33h 26m

$1,597

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

sam. 13/12

05:05-09:30

2 stops33h 55m

Adelaide

lun. 5/1

14:55-16:52

1 stop20h 27m

$1,820

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

dim. 14/12

23:59-09:30

2 stops39h 01m

Adelaide

lun. 5/1

14:55-00:59

1 stop28h 34m

$1,820

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

lun. 15/12

07:10-09:30

2 stops31h 50m

Adelaide

lun. 5/1

14:55-09:55

2 stops37h 30m

$1,820

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

dim. 15/3

14:47-14:10

2 stops29h 53m

Adelaide

jeu. 19/3

06:00-12:51

3 stops24h 21m

$2,035

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

ven. 12/12

23:59-09:30

2 stops39h 01m

Adelaide

lun. 5/1

14:55-00:59

1 stop28h 34m

$2,345

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

mar. 16/12

17:11-14:10

2 stops26h 29m

Adelaide

lun. 5/1

14:55-18:45

1 stop22h 20m

$2,379

Flights are sorted by cheapest return flights first.

Deals found on 14/9

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 return 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
No data available for this route at this time. Please check back soon.

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?

    Adelaide (ADL), located 6.6 km from the city centre, is the airport you fly into when you book flights from Washington to Adelaide.

  • How long is the flight from State of Washington to Adelaide?

    Air Canada and United Airlines can get you from State of Washington to Adelaide in just under 28h 45m. Your travel time can differ by up to 5h 10m. State of Washington and Adelaide are separated by a distance of 13409 km. 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 holiday 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, June is the cheapest month in which you can book a flight from State of Washington to Adelaide (average of $168). Flying from State of Washington to Adelaide in October is currently the most expensive (average of $241). 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

Travelling to a place near Adelaide?

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

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Can Cheapflights find flights from Washington to Adelaide with no change fees?

Yes, we can. To see specific flights from Washington to Adelaide with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Yes, Cheapflights offers price alerts on Washington to Adelaide flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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