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Cheap flights from Washington to Adelaide from $1,722

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Adelaide departing on 17/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington to Adelaide

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
19:05 - 14:05SEA  Seattle/Tacoma Intl-ADL Adelaide
24h 30m2 stops Vancouver Intl Sydney Kingsford Smith
Multiple Airlines Logo
06:10 - 14:37ADL  Adelaide-SEA Seattle/Tacoma Intl
26h 57m2 stops Brisbane Vancouver Intl
$1,722Multiple Airlines
Tue, 17 Nov - Sun, 22 Nov
Air Canada Logo
15:15 - 19:10SEA  Seattle/Tacoma Intl-ADL Adelaide
33h 25m2 stops Vancouver Intl Sydney Kingsford Smith
Air Canada Logo
06:00 - 18:22ADL  Adelaide-SEA Seattle/Tacoma Intl
30h 52m2 stops Sydney Kingsford Smith Vancouver Intl
$1,786Air Canada
Sun, 7 Feb - Sat, 27 Feb
Air Canada Logo
15:00 - 11:50SEA  Seattle/Tacoma Intl-ADL Adelaide
28h 20m2 stops Vancouver Intl Sydney Kingsford Smith
Air Canada Logo
19:00 - 10:05ADL  Adelaide-SEA Seattle/Tacoma Intl
31h 35m2 stops Sydney Kingsford Smith Vancouver Intl
$1,786Air Canada
Tue, 8 Sep - Mon, 14 Sep
United Airlines Logo
12:15 - 13:00SEA  Seattle/Tacoma Intl-ADL Adelaide
30h 15m2 stops Los Angeles Melbourne
United Airlines Logo
14:55 - 00:33ADL  Adelaide-SEA Seattle/Tacoma Intl
28h 08m1 stop San Francisco
$1,794United Airlines
Wed, 9 Dec - Wed, 23 Dec
United Airlines Logo
12:15 - 13:00SEA  Seattle/Tacoma Intl-ADL Adelaide
30h 15m2 stops Los Angeles Melbourne
United Airlines Logo
14:55 - 21:21ADL  Adelaide-SEA Seattle/Tacoma Intl
24h 56m2 stops San Francisco Denver Intl
$1,800United Airlines
Wed, 9 Dec - Wed, 23 Dec
Multiple Airlines Logo
07:20 - 22:35SEA  Seattle/Tacoma Intl-ADL Adelaide
22h 45m2 stops Honolulu Sydney Kingsford Smith
Multiple Airlines Logo
12:40 - 21:29ADL  Adelaide-SEA Seattle/Tacoma Intl
25h 19m2 stops Sydney Kingsford Smith Honolulu
$1,805Multiple Airlines
Fri, 21 Aug - Sat, 5 Sep
Qantas Airways Logo
17:02 - 11:55SEA  Seattle/Tacoma Intl-ADL Adelaide
26h 23m2 stops Los Angeles Sydney Kingsford Smith
Qantas Airways Logo
17:10 - 12:16ADL  Adelaide-SEA Seattle/Tacoma Intl
36h 36m2 stops Sydney Kingsford Smith Los Angeles
$1,913Qantas Airways
Tue, 29 Sep - Mon, 5 Oct
Qantas Airways Logo
16:59 - 19:05SEA  Seattle/Tacoma Intl-ADL Adelaide
33h 36m2 stops Los Angeles Sydney Kingsford Smith
Qantas Airways Logo
19:10 - 22:37ADL  Adelaide-SEA Seattle/Tacoma Intl
44h 57m2 stops Sydney Kingsford Smith Los Angeles
$2,223Qantas Airways
Wed, 30 Sep - Tue, 6 Oct

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Qantas Airways flights from State of Washington to Adelaide

Our best Qantas Airways deals on State of Washington to Adelaide flight tickets
Qantas Airways
29 Sept
SEA17:02Seattle/Tacoma Intl
26h 23m
2 stops
ADL11:55Adelaide
5 Oct
ADL17:10Adelaide
36h 36m
2 stops
SEA12:16Seattle/Tacoma Intl
$1,913
Qantas Airways
30 Sept
SEA16:59Seattle/Tacoma Intl
33h 36m
2 stops
ADL19:05Adelaide
6 Oct
ADL19:10Adelaide
44h 57m
2 stops
SEA22:37Seattle/Tacoma Intl
$2,223

Qatar Airways flights from State of Washington to Adelaide

Our best Qatar Airways deals on State of Washington to Adelaide flight tickets
Qatar Airways
14 Jan
SEA15:50Seattle/Tacoma Intl
30h 45m
1 stop
ADL17:05Adelaide
7 Feb
ADL22:00Adelaide
32h 10m
1 stop
SEA11:40Seattle/Tacoma Intl
$1,830
Qatar Airways
7 Feb
SEA15:50Seattle/Tacoma Intl
34h 20m
2 stops
ADL20:40Adelaide
27 Feb
ADL22:00Adelaide
32h 10m
1 stop
SEA11:40Seattle/Tacoma Intl
$1,859
Qatar Airways
7 Feb
SEA15:50Seattle/Tacoma Intl
34h 20m
2 stops
ADL20:40Adelaide
27 Feb
ADL22:00Adelaide
32h 10m
1 stop
SEA11:40Seattle/Tacoma Intl
$1,861

momondo Fare Finder

 
Customise your flight search to find flights from State of 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, momondo users made 78,305 searches. Data last updated 11 August 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 Seattle/Tacoma Intl - ADL Adelaide

SEAADL

Seattle/Tacoma Intl

Tue 17/11

19:05-14:05

2 stops24h 30m

Adelaide

Sun 22/11

06:10-14:37

2 stops26h 57m

$1,722

SeattleAdelaide

SEA Seattle/Tacoma Intl - ADL Adelaide

SEAADL

Seattle/Tacoma Intl

Sun 7/2

15:15-19:10

2 stops33h 25m

Adelaide

Sat 27/2

06:00-18:22

2 stops30h 52m

$1,786

SeattleAdelaide

SEA Seattle/Tacoma Intl - ADL Adelaide

SEAADL

Seattle/Tacoma Intl

Tue 8/9

15:00-11:50

2 stops28h 20m

Adelaide

Mon 14/9

19:00-10:05

2 stops31h 35m

$1,786

SeattleAdelaide

SEA Seattle/Tacoma Intl - ADL Adelaide

SEAADL

Seattle/Tacoma Intl

Wed 9/12

12:15-13:00

2 stops30h 15m

Adelaide

Wed 23/12

14:55-00:33

1 stop28h 08m

$1,794

SeattleAdelaide

SEA Seattle/Tacoma Intl - ADL Adelaide

SEAADL

Seattle/Tacoma Intl

Wed 9/12

12:15-13:00

2 stops30h 15m

Adelaide

Wed 23/12

14:55-21:21

2 stops24h 56m

$1,800
Fastest return journey

SeattleAdelaide

SEA Seattle/Tacoma Intl - ADL Adelaide

SEAADL

Seattle/Tacoma Intl

Fri 21/8

07:20-22:35

2 stops22h 45m

Adelaide

Sat 5/9

12:40-21:29

2 stops25h 19m

$1,805

SeattleAdelaide

SEA Seattle/Tacoma Intl - ADL Adelaide

SEAADL

Seattle/Tacoma Intl

Tue 29/9

17:02-11:55

2 stops26h 23m

Adelaide

Mon 5/10

17:10-12:16

2 stops36h 36m

$1,913

SeattleAdelaide

SEA Seattle/Tacoma Intl - ADL Adelaide

SEAADL

Seattle/Tacoma Intl

Wed 30/9

16:59-19:05

2 stops33h 36m

Adelaide

Tue 6/10

19:10-22:37

2 stops44h 57m

$2,223

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

Cheap State of Washington to Adelaide flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Adelaide

Fastest flight time

22h 45m

Direct flights

None
The fastest flight from State of Washington to Adelaide takes 22h 45m
There are no direct flights from State of Washington to Adelaide. There are no popular flight routes from State of Washington to Adelaide.
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Frequently asked questions about flying from Washington to Adelaide

  • When did momondo last update prices for flights from Washington to Adelaide Airport?

    Prices for flights from Washington to Adelaide Airport were last updated today.

  • How old do you have to be to fly from Washington to Adelaide Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Adelaide Airport.

  • What documentation or ID do you need to fly to Adelaide Airport?

    The necessary travel and health documents for your Adelaide Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Washington to Adelaide

  • How do I get Price Alerts for flights from State of Washington to Adelaide?

    Confirm your travel details to search for the latest offers for flights from State of Washington to Adelaide. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from State of Washington to Adelaide with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Travelling to a place near Adelaide?

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

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Adelaide?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington to Adelaide. momondo saves you time and could save you money on your trip.

Can I find flights from Washington to Adelaide with flexible booking policies on momondo?

momondo does allow users to show only those flights to Adelaide from Washington which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Washington to Adelaide?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington to Adelaide.

I’m not ready to book a flight from Washington to Adelaide right now. Can momondo alert me if prices change?

Price alerts on flights to Adelaide from Washington are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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