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Cheap flights from Washington to Adelaide from $984

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 17/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
10 Jun — 17 Jun1
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 11 May 2026.

Thu 4/620:50
SEA
-
ADL
2 stops33h 15m
Multiple Airlines
Thu 11/619:10
ADL
-
SEA
2 stops45h 19m
Multiple Airlines
Deal found 6/5$1,791
Sat 9/518:40
SEA
-
ADL
2 stops26h 30m
American Airlines
Sat 16/512:40
ADL
-
SEA
2 stops26h 48m
American Airlines
Deal found 6/5$1,934
Sat 9/517:06
SEA
-
ADL
2 stops25h 59m
Multiple Airlines
Sat 16/512:35
ADL
-
SEA
2 stops25h 39m
Multiple Airlines
Deal found 9/5$1,940
Mon 6/708:00
SEA
-
ADL
2 stops22h 05m
Multiple Airlines
Fri 24/715:00
ADL
-
SEA
2 stops25h 29m
Multiple Airlines
Deal found 9/5$2,031
Thu 12/1110:35
SEA
-
ADL
2 stops35h 05m
Air Canada
Mon 16/1106:10
ADL
-
SEA
2 stops22h 11m
Air Canada
Deal found 7/5$2,047

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 11 May 2026.

Round-trip from

$1,791

One-way from

$984
4/6-11/6
  • 4/6-11/6
  • 4 total stops
  • 78h 34m total
  • Washington to Adelaide
Search Deals
United Airlines
  • United Airlines
  • 17/5
  • 2 total stops
  • 31h 01m 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 11 May 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

Thu 4/6

20:50-22:35

2 stops33h 15m

Adelaide

Thu 11/6

19:10-23:59

2 stops45h 19m

$1,791
Fastest return journey

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 6/7

08:00-22:35

2 stops22h 05m

Adelaide

Fri 24/7

15:00-23:59

2 stops25h 29m

$2,031

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 4/6

13:30-11:05

2 stops29h 05m

Adelaide

Thu 11/6

20:00-21:10

3 stops41h 40m

$2,515

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 6/7

06:00-17:45

2 stops43h 15m

Adelaide

Fri 24/7

06:25-18:32

3 stops28h 37m

$2,675

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 6/7

16:30-13:55

2 stops28h 55m

Adelaide

Fri 24/7

06:00-18:32

3 stops29h 02m

$3,555

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 6/7

17:15-20:05

1 stop34h 20m

Adelaide

Fri 24/7

22:00-13:25

1 stop31h 55m

$4,198

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 8/9

19:07-16:25

2 stops28h 48m

Adelaide

Thu 8/10

06:00-12:16

2 stops23h 46m

$4,783

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 9/9

19:07-11:05

2 stops23h 28m

Adelaide

Sun 4/10

06:00-14:25

2 stops25h 55m

$4,783
Cheapest one-way

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 17/5

11:39-11:10

2 stops31h 01m

$984
Fastest single journey

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 22/6

17:10-09:25

2 stops23h 45m

$1,160

Flights are sorted by cheapest return flights first.

Deals found on 5/5

Showing 1-10 of 12 resultsSorted by cheapest first
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 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 and Air New Zealand can get you from State of Washington to Adelaide in just under 29h 05m. Your travel time can differ by up to 14h 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.

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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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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