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Cheap flights from Washington to Adelaide from $1,002

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
20 Jan — 27 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to Adelaide

Enter your travel dates to find the best prices.

Best flights from Washington to Adelaide
Discover carefully curated flight deals from Washington to Adelaide that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 December 2025.

Wed 4/220:00SEA - ADL
2 stops28h 20mMultiple Airlines
Wed 11/206:10ADL - SEA
2 stops26h 51mMultiple Airlines
Deal found 20/12$1,457
Tue 3/220:00SEA - ADL
2 stops32h 00mAir Canada
Tue 10/206:10ADL - SEA
2 stops21h 35mAir Canada
Deal found 20/12$1,528
Mon 2/217:10SEA - ADL
1 stop21h 50mUnited Airlines
Mon 9/214:55ADL - SEA
1 stop24h 47mUnited Airlines
Deal found 19/12$1,683
Mon 2/220:00SEA - ADL
2 stops24h 55mMultiple Airlines
Mon 9/206:00ADL - SEA
2 stops21h 45mMultiple Airlines
Deal found 19/12$1,519
Sat 21/220:00SEA - ADL
2 stops28h 40mAir Canada
Tue 24/219:55ADL - SEA
2 stops37h 06mAir Canada
Deal found 18/12$1,645
Wed 4/219:30SEA - ADL
2 stops23h 00mUnited Airlines
Wed 11/214:55ADL - SEA
1 stop24h 47mUnited Airlines
Deal found 20/12$2,074
Sat 9/517:06SEA - ADL
2 stops25h 59mMultiple Airlines
Sat 16/512:35ADL - SEA
2 stops26h 07mMultiple Airlines
Deal found 20/12$1,900
Tue 3/209:25SEA - ADL
2 stops34h 15mUnited Airlines
Tue 10/207:15ADL - SEA
3 stops32h 27mUnited Airlines
Deal found 20/12$2,085

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 21 December 2025.

Round-trip from

$1,457

One-way from

$1,002

Popular in

January

Cheapest in

September

Average price

$1,926
Air Canada
  • Air Canada
  • 4/2-11/2
  • 4 total stops
  • 55h 11m total
  • Washington to Adelaide
Search Deals
15/5
  • 15/5
  • 3 total stops
  • 43h 30m total
  • Washington to Adelaide
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($533 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($208 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 21 December 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

Wed 4/2

20:00-18:50

2 stops28h 20m

Adelaide

Wed 11/2

06:10-14:31

2 stops26h 51m

$1,457

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/2

20:00-15:25

2 stops24h 55m

Adelaide

Mon 9/2

06:00-09:15

2 stops21h 45m

$1,519

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 3/2

20:00-22:30

2 stops32h 00m

Adelaide

Tue 10/2

06:10-09:15

2 stops21h 35m

$1,528

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 21/2

20:00-19:10

2 stops28h 40m

Adelaide

Tue 24/2

19:55-14:31

2 stops37h 06m

$1,645

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/2

17:10-09:30

1 stop21h 50m

Adelaide

Mon 9/2

14:55-21:12

1 stop24h 47m

$1,683

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 9/5

17:06-11:35

2 stops25h 59m

Adelaide

Sat 16/5

12:35-22:12

2 stops26h 07m

$1,900

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 4/2

19:30-13:00

2 stops23h 00m

Adelaide

Wed 11/2

14:55-21:12

1 stop24h 47m

$2,074

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 3/2

09:25-14:10

2 stops34h 15m

Adelaide

Tue 10/2

07:15-21:12

3 stops32h 27m

$2,085

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 15/5

19:55-07:55

3 stops43h 30m

$1,002

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 20/1

15:57-12:15

2 stops25h 48m

$1,054

Flights are sorted by cheapest return flights first.

Deals found on 19/12

Showing 1-10 of 16 results
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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?

    Air Canada can get you from State of Washington to Adelaide in just under 32h. 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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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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