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Adelaide

$728+ 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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
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 21, 2026.

This Air Canada deal was found by Cheapflights users on 1/19. 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 2/97:05 pm
PDX
-
ADL
2 stops28h 25m
Multiple Airlines
Thu 2/196:10 am
ADL
-
PDX
2 stops30h 50m
Multiple Airlines
Deal found 1/19$1,004
This Expedia deal was found by Cheapflights users on 1/21. 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 4/187:05 pm
PDX
-
ADL
2 stops24h 15m
Multiple Airlines
Thu 4/309:20 pm
ADL
-
PDX
2 stops33h 55m
Multiple Airlines
Deal found 1/21$1,035
This Air Canada deal was found by Cheapflights users on 1/18. 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.
Thu 3/57:05 pm
PDX
-
ADL
2 stops24h 20m
Air Canada
Thu 3/126:10 am
ADL
-
PDX
2 stops20h 35m
Air Canada
Deal found 1/18$1,039
This Expedia deal was found by Cheapflights users on 1/21. 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.
Fri 2/208:00 pm
SEA
-
ADL
2 stops32h 00m
Multiple Airlines
Fri 2/276:00 am
ADL
-
SEA
2 stops31h 46m
Multiple Airlines
Deal found 1/21$1,040
This Gotogate deal was found by Cheapflights users on 1/21. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/710:05 am
SEA
-
ADL
2 stops38h 15m
Multiple Airlines
Sat 3/146:55 pm
ADL
-
SEA
2 stops32h 06m
Multiple Airlines
Deal found 1/21$1,090
This Air Canada deal was found by Cheapflights users on 1/19. 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 2/83:15 pm
PDX
-
ADL
2 stops36h 45m
Air Canada
Thu 2/127:55 pm
ADL
-
PDX
2 stops37h 15m
Air Canada
Deal found 1/19$1,092
This United Airlines deal was found by Cheapflights users on 1/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/99:25 am
SEA
-
ADL
1 stop29h 35m
United Airlines
Mon 2/162:55 pm
ADL
-
SEA
1 stop19h 16m
United Airlines
Deal found 1/21$1,115
This Air Canada deal was found by Cheapflights users on 1/18. 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 2/158:00 pm
SEA
-
ADL
2 stops28h 40m
Air Canada
Thu 2/196:10 am
ADL
-
SEA
2 stops31h 36m
Air Canada
Deal found 1/18$1,161
This Air Canada deal was found by Cheapflights users on 1/18. 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.
Thu 3/53:15 pm
PDX
-
ADL
2 stops30h 25m
Air Canada
Mon 3/96:00 am
ADL
-
PDX
2 stops30h 00m
Air Canada
Deal found 1/18$1,166
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/68:00 am
SEA
-
ADL
2 stops22h 05m
Multiple Airlines
Fri 7/248:50 am
ADL
-
SEA
2 stops31h 39m
Multiple Airlines
Deal found 1/19$1,213
This United Airlines deal was found by Cheapflights users on 1/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/75:20 pm
SEA
-
ADL
1 stop21h 40m
United Airlines
Sat 3/141:55 pm
ADL
-
SEA
1 stop28h 34m
United Airlines
Deal found 1/21$1,215
This Expedia deal was found by Cheapflights users on 1/21. 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.
Tue 1/277:00 am
SEA
-
ADL
2 stops30h 45m
Multiple Airlines
Fri 1/305:10 pm
ADL
-
SEA
2 stops22h 22m
Multiple Airlines
Deal found 1/21$1,388

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 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$1,004
(Air Canada)

One-way from

$725
(Qantas Airways)
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 21, 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

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 2/9

7:05 pm-6:00 pm

2 stops28h 25m

Adelaide

Thu 2/19

6:10 am-6:30 pm

2 stops30h 50m

$1,004

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sat 4/18

7:05 pm-11:50 am

2 stops24h 15m

Adelaide

Thu 4/30

9:20 pm-2:45 pm

2 stops33h 55m

$1,035

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Thu 3/5

7:05 pm-1:55 pm

2 stops24h 20m

Adelaide

Thu 3/12

6:10 am-9:15 am

2 stops20h 35m

$1,039

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 3/7

10:05 am-6:50 pm

2 stops38h 15m

Adelaide

Sat 3/14

6:55 pm-9:31 am

2 stops32h 06m

$1,090

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 2/8

3:15 pm-10:30 pm

2 stops36h 45m

Adelaide

Thu 2/12

7:55 pm-2:40 pm

2 stops37h 15m

$1,092

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/9

9:25 am-9:30 am

1 stop29h 35m

Adelaide

Mon 2/16

2:55 pm-3:41 pm

1 stop19h 16m

$1,115

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 2/15

8:00 pm-7:10 pm

2 stops28h 40m

Adelaide

Thu 2/19

6:10 am-7:16 pm

2 stops31h 36m

$1,161

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Thu 3/5

3:15 pm-4:10 pm

2 stops30h 25m

Adelaide

Mon 3/9

6:00 am-6:30 pm

2 stops30h 00m

$1,166

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

8:00 am-10:35 pm

2 stops22h 05m

Adelaide

Fri 7/24

8:50 am-11:59 pm

2 stops31h 39m

$1,213

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 3/7

12:55 pm-9:30 am

2 stops26h 05m

Adelaide

Sat 3/14

1:55 pm-6:30 pm

1 stop22h 05m

$1,215

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

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 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 $1,039, Air Canada can have you in Adelaide from State of Washington in 24h 20m. 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 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,088Average$1,166FlexibilityNo cancel feeOn-time74%

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