What is the cheapest airline that flies from Washington to Adelaide?

Air Canada, United Airlines, and Singapore Airlines are the most popular carriers operating 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 many operators does momondo search for flights from Washington to Adelaide Airport?

As of August 2025, there is 1 operator available to choose from for flights from Washington to Adelaide Airport.

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 offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify 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 license 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.

$476 Cheap Flights from Washington to Adelaide in 2025

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Find the cheapest flights from Washington to Adelaide

Round-trip

One-way

Cheap round-trip flights

2:50 pm - 10:55 amPDX-ADL

25h 35m2 stops

11:55 am - 8:50 pmADL-PDX

27h 25m2 stops

$1,040

Find Deal

Mon, Nov 3 - Wed, Nov 19

7:00 pm - 10:30 pmPDX-ADL

33h 00m2 stops

6:10 am - 6:30 pmADL-PDX

30h 50m2 stops

$1,044Air Canada

Find Deal

Mon, Nov 3 - Wed, Nov 19

3:25 pm - 12:05 pmPDX-ADL

28h 10m2 stops

9:20 pm - 9:21 amADL-PDX

28h 31m2 stops

$1,056

Find Deal

Sun, Sep 21 - Sun, Sep 28

6:00 am - 10:55 amPDX-ADL

34h 25m2 stops

11:55 am - 12:44 amADL-PDX

31h 19m2 stops

$1,165Air New Zealand

Find Deal

Wed, Nov 26 - Thu, Dec 11

3:55 pm - 10:55 amPDX-ADL

24h 30m2 stops

11:55 am - 6:41 pmADL-PDX

25h 16m2 stops

$1,170Air New Zealand

Find Deal

Wed, Dec 3 - Wed, Dec 17

7:00 pm - 10:55 amPDX-ADL

45h 25m2 stops

11:55 am - 6:41 pmADL-PDX

25h 16m2 stops

$1,208Air New Zealand

Find Deal

Mon, Nov 24 - Mon, Dec 8

12:35 pm - 6:15 pmPDX-ADL

35h 10m2 stops

6:00 am - 4:28 pmADL-PDX

28h 58m2 stops

$1,242Qantas Airways

Find Deal

Thu, Dec 4 - Wed, Dec 17

12:35 pm - 10:30 pmPDX-ADL

39h 25m2 stops

6:00 am - 10:44 pmADL-PDX

35h 14m2 stops

$1,254Qantas Airways

Find Deal

Fri, Dec 5 - Fri, Dec 19

10:05 am - 4:20 pmPDX-ADL

35h 45m2 stops

2:55 pm - 10:52 pmADL-PDX

26h 27m1 stop

$1,365United Airlines

Find Deal

Sat, Nov 22 - Sat, Dec 13

6:00 am - 1:55 pmPDX-ADL

37h 25m3 stops

2:55 pm - 10:52 pmADL-PDX

26h 27m1 stop

$1,368United Airlines

Find Deal

Sat, Nov 22 - Sat, Dec 13

Qantas Airways flights from State of Washington to Adelaide

Our best Qantas Airways deals on State of Washington to Adelaide flight tickets

Qantas Airways

Dec 4

PDX12:35 pmPortland

35h 10m

2 stops

ADL6:15 pmAdelaide

Dec 17

ADL6:00 amAdelaide

28h 58m

2 stops

PDX4:28 pmPortland

$1,242

Find similar

Qantas Airways

Dec 5

PDX12:35 pmPortland

39h 25m

2 stops

ADL10:30 pmAdelaide

Dec 19

ADL6:00 amAdelaide

35h 14m

2 stops

PDX10:44 pmPortland

$1,254

Find similar

Qantas Airways

Nov 23

PDX2:39 pmPortland

26h 41m

2 stops

ADL11:50 amAdelaide

Dec 13

ADL11:35 amAdelaide

29h 14m

2 stops

PDX10:19 pmPortland

$1,277

Find similar

Air New Zealand flights from State of Washington to Adelaide

Our best Air New Zealand deals on State of Washington to Adelaide flight tickets

Air New Zealand

Nov 26

PDX6:00 amPortland

34h 25m

2 stops

ADL10:55 amAdelaide

Dec 11

ADL11:55 amAdelaide

31h 19m

2 stops

PDX12:44 amPortland

$1,165

Find similar

Air New Zealand

Dec 3

PDX3:55 pmPortland

24h 30m

2 stops

ADL10:55 amAdelaide

Dec 17

ADL11:55 amAdelaide

25h 16m

2 stops

PDX6:41 pmPortland

$1,170

Find similar

Air New Zealand

Nov 24

PDX7:00 pmPortland

45h 25m

2 stops

ADL10:55 amAdelaide

Dec 8

ADL11:55 amAdelaide

25h 16m

2 stops

PDX6:41 pmPortland

$1,208

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 11/3

2:50 pm-10:55 am

2 stops25h 35m

Adelaide

Wed 11/19

11:55 am-8:50 pm

2 stops27h 25m

$1,040

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 11/3

7:00 pm-10:30 pm

2 stops33h 00m

Adelaide

Wed 11/19

6:10 am-6:30 pm

2 stops30h 50m

$1,044

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 9/21

3:25 pm-12:05 pm

2 stops28h 10m

Adelaide

Sun 9/28

9:20 pm-9:21 am

2 stops28h 31m

$1,056

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Wed 11/26

6:00 am-10:55 am

2 stops34h 25m

Adelaide

Thu 12/11

11:55 am-12:44 am

2 stops31h 19m

$1,165

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Wed 12/3

3:55 pm-10:55 am

2 stops24h 30m

Adelaide

Wed 12/17

11:55 am-6:41 pm

2 stops25h 16m

$1,170

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 11/24

7:00 pm-10:55 am

2 stops45h 25m

Adelaide

Mon 12/8

11:55 am-6:41 pm

2 stops25h 16m

$1,208

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Thu 12/4

12:35 pm-6:15 pm

2 stops35h 10m

Adelaide

Wed 12/17

6:00 am-4:28 pm

2 stops28h 58m

$1,242

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Fri 12/5

12:35 pm-10:30 pm

2 stops39h 25m

Adelaide

Fri 12/19

6:00 am-10:44 pm

2 stops35h 14m

$1,254

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sat 11/22

10:05 am-4:20 pm

2 stops35h 45m

Adelaide

Sat 12/13

2:55 pm-10:52 pm

1 stop26h 27m

$1,365

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sat 11/22

6:00 am-1:55 pm

3 stops37h 25m

Adelaide

Sat 12/13

2:55 pm-10:52 pm

1 stop26h 27m

$1,368

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first

How to get the cheapest flight ticket from State of Washington to Adelaide

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Adelaide?

The cheapest day to depart on your flight to Adelaide is on a Wednesday when prices can be found for as low as $1,293. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Adelaide is Friday, with ticket prices averaging around $1,570.

What is the cheapest time of day to depart on your flight to Adelaide?

According to our data, the cheapest time of day to fly to Adelaide is in the morning. momondo users have found flights departing from State of Washington to Adelaide in the morning for as low as $1,161. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Adelaide are more costly in the afternoon, with an average ticket price of $1,555. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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

Best Price Found	$476
Fastest flight time	23h 35m
Direct flights	None
Airports in Adelaide	1 airport

The best one-way flight to Adelaide from State of Washington in the past 72 hours is $476. The best round-trip flight deal from State of Washington to Adelaide found on momondo in the last 72 hours is $1,040.

The fastest flight from State of Washington to Adelaide takes 23h 35m

There are no direct flights from State of Washington to Adelaide. Popular non-direct routes for this connection are Seattle/Tacoma Intl Airport - Adelaide Airport and Portland Airport - Adelaide Airport.

There is 1 airport near Adelaide: Adelaide (ADL)

Search flight deals

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 many operators does momondo search for flights from Washington to Adelaide Airport?
As of August 2025, there is 1 operator available to choose from for flights from Washington to Adelaide Airport.
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 offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify 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 license 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.

Best airlines flying from State of Washington to Adelaide

Compare and see reviews for airlines that fly from State of Washington to Adelaide with momondo

Airline	Rating	Free Cancellation	Price
Qantas Airways	PriceFrom $1,088	Free Cancellation	Rating 7.5 888 reviews		Search Qantas Airways flights

Glenelg

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?

Yes. All flights to Adelaide from Washington on momondo can be compared and filtered by various policies on offer, including flexible booking.

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?

Yes. momondo can track prices for Washington to Adelaide flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.