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Cheap flights from Washington to Adelaide from $789

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 15/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
4 Mar — 11 Mar1
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 2 February 2026.

Mon 2/320:00
SEA
-
ADL
2 stops23h 25m
Multiple Airlines
Mon 9/319:55
ADL
-
SEA
2 stops31h 06m
Multiple Airlines
Deal found 2/2$1,470
Thu 15/1017:55
SEA
-
ADL
2 stops25h 10m
Multiple Airlines
Mon 26/1013:15
ADL
-
SEA
2 stops24h 20m
Multiple Airlines
Deal found 31/1$1,511
Mon 3/821:09
SEA
-
ADL
2 stops45h 56m
Multiple Airlines
Thu 20/812:35
ADL
-
SEA
2 stops21h 52m
Multiple Airlines
Deal found 1/2$1,560
Mon 9/212:25
SEA
-
ADL
2 stops26h 35m
United Airlines
Mon 23/214:55
ADL
-
SEA
2 stops24h 47m
United Airlines
Deal found 31/1$1,589
Mon 9/219:30
SEA
-
ADL
1 stop19h 30m
United Airlines
Mon 16/214:55
ADL
-
SEA
1 stop28h 34m
United Airlines
Deal found 2/2$1,608
Wed 18/318:59
SEA
-
ADL
2 stops25h 11m
Qantas Airways
Wed 25/307:50
ADL
-
SEA
2 stops25h 22m
Qantas Airways
Deal found 31/1$1,612
Mon 6/708:00
SEA
-
ADL
2 stops22h 05m
Multiple Airlines
Fri 24/708:50
ADL
-
SEA
2 stops31h 39m
Multiple Airlines
Deal found 30/1$1,741
Sun 1/211:45
SEA
-
ADL
2 stops50h 00m
Multiple Airlines
Sun 8/217:10
ADL
-
SEA
2 stops23h 37m
Multiple Airlines
Deal found 31/1$1,778

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 2 February 2026.

Round-trip from

$1,470

One-way from

$789
Air Canada
  • Air Canada
  • 2/3-9/3
  • 4 total stops
  • 54h 31m total
  • Washington to Adelaide
Search Deals
15/5
  • 15/5
  • 2 total stops
  • 45h 50m 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 2 February 2026.
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

Mon 2/3

20:00-13:55

2 stops23h 25m

Adelaide

Mon 9/3

19:55-09:31

2 stops31h 06m

$1,470

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/3

12:32-09:30

1 stop26h 28m

Adelaide

Mon 9/3

14:15-16:14

1 stop19h 29m

$1,608

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 18/3

18:59-13:40

2 stops25h 11m

Adelaide

Wed 25/3

07:50-15:42

2 stops25h 22m

$1,612

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 6/7

08:00-22:35

2 stops22h 05m

Adelaide

Fri 24/7

08:50-23:59

2 stops31h 39m

$1,741

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 18/3

23:59-09:20

2 stops39h 51m

Adelaide

Wed 25/3

14:15-23:28

1 stop26h 43m

$1,992

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 15/2

15:40-22:30

2 stops36h 20m

Adelaide

Thu 19/2

06:10-14:46

2 stops27h 06m

$2,073

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 15/2

18:04-14:10

2 stops25h 36m

Adelaide

Thu 19/2

07:15-21:01

3 stops32h 16m

$2,365

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 15/5

21:15-11:35

2 stops45h 50m

$789

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 17/5

18:40-11:05

2 stops23h 55m

$1,055

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 17/5

18:59-09:25

3 stops45h 56m

$1,519

Flights are sorted by cheapest return flights first.

Deals found on 31/1

Showing 1-10 of 12 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 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 Qantas Airways can get you from State of Washington to Adelaide in just under 25h 11m. Your travel time can differ by up to 1h 17m. 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?

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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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