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Cheap flights from Washington to Adelaide from $802

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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
24 Apr — 1 May1
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 25 March 2026.

Tue 5/514:55
SEA
-
ADL
2 stops28h 25m
Multiple Airlines
Tue 12/517:15
ADL
-
SEA
2 stops37h 35m
Multiple Airlines
Deal found 21/3$1,394
Thu 7/514:55
SEA
-
ADL
2 stops30h 30m
Multiple Airlines
Thu 14/517:15
ADL
-
SEA
2 stops33h 20m
Multiple Airlines
Deal found 23/3$1,501
Sat 25/415:40
SEA
-
ADL
2 stops32h 30m
Multiple Airlines
Tue 28/420:00
ADL
-
SEA
2 stops30h 08m
Multiple Airlines
Deal found 23/3$1,516
Mon 6/719:20
SEA
-
ADL
2 stops25h 40m
Multiple Airlines
Fri 24/719:35
ADL
-
SEA
2 stops30h 47m
Multiple Airlines
Deal found 23/3$1,653
Fri 8/510:45
SEA
-
ADL
2 stops36h 40m
Air Canada
Tue 12/520:00
ADL
-
SEA
2 stops30h 35m
Air Canada
Deal found 22/3$1,701
Sat 31/1019:05
SEA
-
ADL
2 stops29h 35m
Air Canada
Wed 4/1106:10
ADL
-
SEA
2 stops22h 11m
Air Canada
Deal found 23/3$2,182
Tue 24/318:59
SEA
-
ADL
2 stops27h 16m
Qantas Airways
Fri 3/406:00
ADL
-
SEA
2 stops24h 28m
Qantas Airways
Deal found 23/3$2,308
Sat 21/307:35
SEA
-
ADL
2 stops42h 10m
Multiple Airlines
Sat 28/317:20
ADL
-
SEA
2 stops25h 09m
Multiple Airlines
Deal found 20/3$2,483

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 25 March 2026.

Round-trip from

$1,394

One-way from

$802
5/5-12/5
  • 5/5-12/5
  • 4 total stops
  • 66h 00m total
  • Washington to Adelaide
Search Deals
12/5
  • 12/5
  • 3 total stops
  • 36h 09m 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 25 March 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

Mon 6/7

19:20-13:30

2 stops25h 40m

Adelaide

Fri 24/7

19:35-09:52

2 stops30h 47m

$1,652
Fastest return journey

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 5/5

19:06-13:35

3 stops25h 59m

Adelaide

Tue 12/5

06:00-13:01

2 stops23h 31m

$1,947

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 16/7

08:00-22:35

2 stops22h 05m

Adelaide

Sun 2/8

08:50-05:59

2 stops37h 39m

$2,734

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 16/7

13:30-11:05

2 stops29h 05m

Adelaide

Sun 2/8

17:10-21:59

3 stops45h 19m

$2,971

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 7/5

16:30-15:50

1 stop30h 50m

Adelaide

Thu 14/5

21:40-12:45

1 stop31h 35m

$3,474

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 6/7

16:25-15:50

1 stop30h 55m

Adelaide

Fri 24/7

21:40-12:25

1 stop31h 15m

$4,155
Cheapest one-way

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 12/5

11:06-15:45

3 stops36h 09m

$802

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 5/5

20:05-21:55

3 stops57h 20m

$865
Fastest single journey

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 17/5

19:20-11:50

2 stops24h 00m

$998

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 13/7

11:03-11:15

2 stops31h 42m

$1,259

Flights are sorted by cheapest return flights first.

Deals found on 21/3

Showing 1-10 of 12 resultsSorted by cheapest first
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.

  • 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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