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Cheap flights from Washington to Adelaide from $864

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 25/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
28 Jul — 4 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to Adelaide

Enter your travel dates to find the best prices.

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 28 June 2026.

Tue 30/618:36
SEA
-
ADL
2 stops23h 59m
Qantas Airways
Tue 25/811:50
ADL
-
SEA
2 stops24h 19m
Qantas Airways
Deal found 28/6$1,829
Wed 12/818:10
SEA
-
ADL
2 stops24h 25m
Multiple Airlines
Wed 19/813:25
ADL
-
SEA
2 stops22h 44m
Multiple Airlines
Deal found 28/6$1,863
Sun 2/819:20
SEA
-
ADL
2 stops30h 20m
Multiple Airlines
Sun 16/820:00
ADL
-
SEA
2 stops34h 52m
Multiple Airlines
Deal found 28/6$1,873
Fri 21/807:20
SEA
-
ADL
2 stops22h 45m
Multiple Airlines
Sat 5/912:40
ADL
-
SEA
2 stops27h 43m
Multiple Airlines
Deal found 28/6$1,886
Fri 14/808:00
SEA
-
ADL
2 stops22h 05m
Multiple Airlines
Fri 28/814:25
ADL
-
SEA
2 stops25h 58m
Multiple Airlines
Deal found 23/6$1,892
Thu 12/1119:05
SEA
-
ADL
2 stops24h 30m
Multiple Airlines
Mon 30/1106:10
ADL
-
SEA
2 stops21h 47m
Multiple Airlines
Deal found 25/6$1,918

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 28 June 2026.

Round-trip from

$1,873

One-way from

$864
Air Canada
  • Air Canada
  • 2/8-16/8
  • 4 total stops
  • 58h 17m total
  • Washington to Adelaide
Search Deals
25/8
  • 25/8
  • 3 total stops
  • 55h 00m total
  • Washington to Adelaide
Search Deals

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 28 June 2026.
Use the filters below to find and compare flights from Washington to Adelaide that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/8

15:00-11:10

2 stops27h 40m

Adelaide

Sun 16/8

20:00-10:07

2 stops30h 37m

$1,873

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/8

18:48-13:45

2 stops26h 27m

Adelaide

Sun 16/8

06:05-21:15

3 stops31h 40m

$2,108

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 29/11

15:27-14:10

2 stops28h 13m

Adelaide

Tue 8/12

08:40-15:54

2 stops25h 44m

$2,115
Fastest return journey

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 20/8

19:35-13:45

2 stops25h 40m

Adelaide

Thu 3/9

06:05-16:14

2 stops26h 39m

$2,232

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 8/7

16:20-22:35

2 stops37h 45m

Adelaide

Tue 21/7

14:25-23:59

2 stops26h 04m

$2,257

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/8

16:25-15:00

1 stop30h 05m

Adelaide

Sun 16/8

21:45-12:45

2 stops55h 30m

$2,585
Cheapest one-way

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 25/8

20:52-08:10

2 stops42h 48m

$1,092

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 25/8

16:25-15:00

1 stop30h 05m

$1,658
Fastest single journey

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 25/8

17:10-13:35

2 stops27h 55m

$2,089

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 25/8

10:15-16:20

1 stop37h 35m

$3,069

Flights are sorted by cheapest return flights first.

Deals found on 26/6

Sorted by cheapest first

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?

    United Airlines can get you from State of Washington to Adelaide in just under 26h 27m. Your travel time can differ by up to . State of Washington and Adelaide are separated by a distance of 13409 km.

  • 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.

See more FAQs

Travelling to a place near Adelaide?

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

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How does Cheapflights help users find flights from Washington to Adelaide?

Deals for Washington to Adelaide flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Washington to Adelaide?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Adelaide from Washington.

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.

Can Cheapflights notify me if prices for flights from Washington to Adelaide become cheaper?

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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