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Adelaide

$543+ Cheap flights from Washington to Adelaide (ADL)

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 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Washington to Adelaide

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 January 29, 2026.

This Expedia deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/18:00 pm
SEA
-
ADL
2 stops28h 20m
Multiple Airlines
Thu 4/97:00 pm
ADL
-
SEA
2 stops31h 03m
Multiple Airlines
Deal found 1/28$915
This Expedia deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/28:00 pm
SEA
-
ADL
2 stops24h 25m
Multiple Airlines
Thu 4/98:00 pm
ADL
-
SEA
2 stops30h 03m
Multiple Airlines
Deal found 1/28$941
This Air Canada deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/97:05 pm
PDX
-
ADL
2 stops24h 05m
Multiple Airlines
Mon 3/166:10 am
ADL
-
PDX
2 stops29h 50m
Multiple Airlines
Deal found 1/28$959
This Air Canada deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/143:00 pm
SEA
-
ADL
2 stops28h 20m
Air Canada
Sat 7/256:55 pm
ADL
-
SEA
2 stops30h 52m
Air Canada
Deal found 1/27$1,032
This FlightHub deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/277:05 pm
PDX
-
ADL
2 stops26h 35m
Multiple Airlines
Fri 3/66:10 am
ADL
-
PDX
2 stops27h 00m
Multiple Airlines
Deal found 1/28$1,039
This BYOjet deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/143:00 pm
SEA
-
ADL
2 stops30h 25m
Multiple Airlines
Sat 7/254:30 pm
ADL
-
SEA
3 stops33h 17m
Multiple Airlines
Deal found 1/27$1,050
This Orbitz deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/28:00 pm
SEA
-
ADL
2 stops24h 25m
Multiple Airlines
Mon 4/209:20 pm
ADL
-
SEA
2 stops28h 43m
Multiple Airlines
Deal found 1/27$1,058
This Expedia deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/147:05 pm
SEA
-
ADL
2 stops29h 40m
Qantas Airways
Sat 3/217:00 pm
ADL
-
SEA
2 stops43h 12m
Qantas Airways
Deal found 1/28$1,067
This KAYAK deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/39:09 pm
SEA
-
ADL
2 stops45h 56m
Multiple Airlines
Sat 8/2212:35 pm
ADL
-
SEA
2 stops24h 00m
Multiple Airlines
Deal found 1/26$1,080
This oojo deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/309:07 pm
SEA
-
ADL
2 stops45h 58m
Multiple Airlines
Sat 10/171:35 pm
ADL
-
SEA
2 stops21h 52m
Multiple Airlines
Deal found 1/28$1,084
This FlightHub deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/93:40 pm
SEA
-
ADL
2 stops29h 45m
Multiple Airlines
Thu 4/169:20 pm
ADL
-
SEA
2 stops34h 13m
Multiple Airlines
Deal found 1/27$1,102
This Air Canada deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/137:05 pm
PDX
-
ADL
2 stops32h 10m
Air Canada
Fri 3/206:10 am
ADL
-
PDX
2 stops20h 35m
Air Canada
Deal found 1/26$1,113

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$915
(Expedia)

One-way from

$543
(Kiwi.com)
Provider with most accurate pricing for Seattle/Tacoma Intl-Adelaide flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Adelaide flights.
Search Deals
From Washington to Adelaide
Search Deals
One-way flight from Washington to Adelaide
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated January 29, 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

Wed 4/1

8:00 pm-5:50 pm

2 stops28h 20m

Adelaide

Thu 4/9

7:00 pm-9:33 am

2 stops31h 03m

$915

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 3/9

7:05 pm-12:40 pm

2 stops24h 05m

Adelaide

Mon 3/16

6:10 am-6:30 pm

2 stops29h 50m

$959

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Fri 2/27

7:05 pm-4:10 pm

2 stops26h 35m

Adelaide

Fri 3/6

6:10 am-2:40 pm

2 stops27h 00m

$1,039

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 4/2

8:00 pm-1:55 pm

2 stops24h 25m

Adelaide

Mon 4/20

9:20 pm-9:33 am

2 stops28h 43m

$1,058

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 4/9

3:40 pm-1:55 pm

2 stops29h 45m

Adelaide

Thu 4/16

9:20 pm-3:03 pm

2 stops34h 13m

$1,102

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Fri 3/13

7:05 pm-8:45 pm

2 stops32h 10m

Adelaide

Fri 3/20

6:10 am-9:15 am

2 stops20h 35m

$1,113

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 3/9

7:49 pm-9:20 am

1 stop20h 01m

Adelaide

Mon 3/16

2:15 pm-9:10 pm

2 stops24h 25m

$1,116

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/9

5:10 pm-9:30 am

1 stop21h 50m

Adelaide

Mon 2/16

2:55 pm-11:30 pm

1 stop27h 05m

$1,119

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 2/9

9:30 pm-12:15 pm

2 stops44h 15m

Adelaide

Thu 2/19

1:15 pm-4:41 pm

2 stops21h 56m

$1,125

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 2/8

7:05 pm-7:10 pm

2 stops29h 35m

Adelaide

Thu 2/12

6:00 am-2:40 pm

2 stops27h 10m

$1,168

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 22 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 round-trip 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?

    Located just 4.1 mi from the city center, Adelaide (ADL) is the airport most travelers will use when flying to Adelaide from Washington.

  • How long is the flight from State of Washington to Adelaide?

    For as low as $1,116, Air Canada can have you in Adelaide from State of Washington in 20h 01m. There are 8275 mi between State of Washington and Adelaide. 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 vacation 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

Traveling to a place near Adelaide?

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

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Washington to Adelaide

Discover the top airline that operate flights from Washington to Adelaide. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,166FlexibilityNo cancel feeOn-time74%

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