What are the cheapest airlines to fly from State of Washington to Australia one-way?

One-way options have recently been found by users for as low as $468 on Air Canada. Other airlines that offer cheap prices include Qantas Airways from $472 and United Airlines from $515 one-way.

How far in advance should I book a flight from State of Washington to Australia?

Travelers have found it’s best to book a flight 10 days in advance to save up to 15% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 10 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from State of Washington to Australia 1-2 weeks in advance for as low as $880, or $1,183 for flights within the next 24 hours.

What is the cheapest month to fly from State of Washington to Australia?

Our data shows that March tends to be the cheapest month to fly to Australia from State of Washington. Users have commonly found prices around $1,144 for the month, but tickets can be as low as $833. Due to multiple factors, prepare for potentially higher prices in December.

Can I find deals for flights from Washington to Australia that include hotel bookings?

Yes. In addition to deals on Washington to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Washington to Australia?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Australia.

Can I find deals for business class flights from Washington to Australia?

Yes. Cheapflights offers flight deals from Washington to Australia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$1,051+ Flights from Washington to Australia - Compare & Save Big

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Cheap flight deals from Washington to Australia

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$919 (FlightHub)
One-way from	$467 (Kiwi.com)
Popular in	December
Cheapest in	March
Average price	$1,119

Provider with most accurate pricing for Seattle/Tacoma Intl-Sydney Kingsford Smith flight deals.

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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Sydney Kingsford Smith flights.

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From Washington to Australia

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One-way flight from Washington to Australia

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Highest demand for flights based on searches. 10% potential increase in price ($129 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($33 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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Find flight deals from Washington to Australia

Cheapest flights from Washington to Australia
Explore the most affordable flight options available from Washington to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 30, 2025.

mié. 10/1511:35 pmSEA - MEL

1 stop36h 25mPhilippine Airlines

mié. 10/299:00 amMEL - SEA

1 stop28h 35mPhilippine Airlines

Deal found 4/29

$919

mié. 8/139:50 pmPDX - SYD

2 stops47h 50mMultiple Airlines

mié. 8/204:20 pmSYD - PDX

1 stop23h 20mMultiple Airlines

Deal found 4/29

$924

mié. 6/113:55 pmSEA - SYD

1 stop29h 45mMultiple Airlines

mié. 6/184:20 pmSYD - SEA

1 stop24h 04mMultiple Airlines

Deal found 4/29

$1,002

jue. 6/57:55 pmSEA - MEL

2 stops30h 20mMultiple Airlines

jue. 6/1211:20 amMEL - SEA

2 stops29h 04mMultiple Airlines

Deal found 4/29

$1,037

dom. 10/1911:35 pmSEA - SYD

1 stop39h 25mPhilippine Airlines

dom. 10/2611:15 amSYD - SEA

1 stop26h 20mPhilippine Airlines

Deal found 4/29

$1,066

lun. 6/26:52 pmSEA - SYD

1 stop19h 13mQantas Airways

lun. 6/95:45 pmSYD - SEA

1 stop38h 05mQantas Airways

Deal found 4/29

$1,079

dom. 6/85:14 pmSEA - SYD

1 stop20h 46mUnited Airlines

mar. 6/179:30 amSYD - SEA

2 stops28h 38mUnited Airlines

Deal found 4/28

$1,087

lun. 6/165:40 pmSEA - SYD

1 stop19h 55mDelta

sáb. 6/219:25 amSYD - SEA

1 stop22h 20mDelta

Deal found 4/29

$1,089

mar. 10/215:40 pmPDX - SYD

2 stops21h 05mAir New Zealand

mar. 11/1811:45 amSYD - PDX

2 stops21h 57mAir New Zealand

Deal found 4/28

$1,108

jue. 6/56:52 pmSEA - AVV

2 stops32h 23mMultiple Airlines

dom. 6/158:55 pmAVV - SEA

2 stops42h 15mMultiple Airlines

Deal found 4/29

$1,111

mar. 5/275:33 pmPDX - SYD

1 stop33h 12mHawaiian Airlines

sáb. 6/79:40 pmSYD - PDX

1 stop17h 15mHawaiian Airlines

Deal found 4/29

$1,125

sáb. 6/285:15 pmSEA - BNE

2 stops30h 40mMultiple Airlines

lun. 7/145:40 pmBNE - SEA

2 stops34h 09mMultiple Airlines

Deal found 4/29

$1,127

Best flights from Washington to Australia
Discover carefully curated flight deals from Washington to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated abril 30, 2025.

mié. 10/1511:35 pmSEA - MEL

1 stop36h 25mPhilippine Airlines

mié. 10/299:00 amMEL - SEA

1 stop28h 35mPhilippine Airlines

Deal found 4/29

$919

mié. 8/139:50 pmPDX - SYD

2 stops47h 50mMultiple Airlines

mié. 8/204:20 pmSYD - PDX

1 stop23h 20mMultiple Airlines

Deal found 4/29

$924

jue. 5/291:35 pmPDX - SYD

1 stop24h 20mUnited Airlines

jue. 6/510:20 amSYD - PDX

1 stop25h 15mUnited Airlines

Deal found 4/29

$966

dom. 8/171:37 pmPDX - SYD

1 stop24h 18mVirgin Australia

sáb. 8/3010:20 amSYD - PDX

1 stop25h 12mVirgin Australia

Deal found 4/29

$1,032

lun. 6/26:52 pmSEA - SYD

1 stop19h 13mQantas Airways

lun. 6/95:45 pmSYD - SEA

1 stop38h 05mQantas Airways

Deal found 4/29

$1,079

lun. 6/165:40 pmSEA - SYD

1 stop19h 55mDelta

sáb. 6/219:25 amSYD - SEA

1 stop22h 20mDelta

Deal found 4/29

$1,089

mar. 5/275:33 pmPDX - SYD

1 stop33h 12mHawaiian Airlines

sáb. 6/79:40 pmSYD - PDX

1 stop17h 15mHawaiian Airlines

Deal found 4/29

$1,125

mar. 9/27:40 pmPDX - SYD

1 stop18h 40mAir Canada

mar. 9/239:20 amSYD - PDX

1 stop22h 26mAir Canada

Deal found 4/29

$1,144

vie. 8/83:40 pmPDX - SYD

2 stops24h 05mAir New Zealand

lun. 8/258:45 amSYD - PDX

2 stops26h 47mAir New Zealand

Deal found 4/29

$1,152

sáb. 5/108:05 amPDX - SYD

1 stop18h 40mAlaska Airlines

mar. 5/209:40 pmSYD - PDX

2 stops25h 40mAlaska Airlines

Deal found 4/28

$1,158

mié. 6/111:45 pmSEA - SYD

2 stops26h 40mANA

vie. 6/208:55 pmSYD - SEA

2 stops38h 41mANA

Deal found 4/29

$1,212

mié. 8/132:56 pmPDX - SYD

1 stop23h 09mAmerican Airlines

mié. 8/209:10 amSYD - PDX

1 stop22h 10mAmerican Airlines

Deal found 4/29

$1,242

Last-minute flights from Washington to Australia
Discover last-minute flight deals from Washington to Australia. Data last updated abril 30, 2025 and is based on user searches.

vie. 5/28:15 amSEA - SYD

1 stop18h 30mHawaiian Airlines

dom. 5/49:40 pmSYD - SEA

1 stop19h 04mHawaiian Airlines

Deal found 4/29

$1,152

lun. 5/56:14 amSEA - SYD

1 stop32h 16mMultiple Airlines

lun. 5/124:20 pmSYD - SEA

2 stops21h 05mMultiple Airlines

Deal found 4/29

$1,124

lun. 5/512:09 pmPDX - SYD

1 stop26h 21mMultiple Airlines

vie. 5/234:20 pmSYD - PDX

2 stops41h 26mMultiple Airlines

Deal found 4/28

$1,145

lun. 5/58:15 amSEA - SYD

1 stop18h 30mAlaska Airlines

dom. 5/119:40 pmSYD - SEA

2 stops25h 56mAlaska Airlines

Deal found 4/29

$1,158

lun. 5/52:30 pmSEA - MEL

1 stop23h 15mMultiple Airlines

dom. 5/115:00 pmMEL - SEA

2 stops54h 15mMultiple Airlines

Deal found 4/29

$1,325

lun. 5/58:15 amSEA - MEL

2 stops32h 50mHawaiian Airlines

dom. 5/113:30 pmMEL - SEA

2 stops31h 45mHawaiian Airlines

Deal found 4/29

$1,337

lun. 5/59:55 amSEA - SYD

2 stops27h 40mDelta

dom. 5/119:25 amSYD - SEA

2 stops30h 00mDelta

Deal found 4/29

$1,502

mar. 5/64:30 pmSEA - PER

1 stop35h 10mQatar Airways

sáb. 5/2410:45 pmPER - SEA

1 stop29h 00mQatar Airways

Deal found 4/29

$1,267

mié. 5/78:05 amPDX - SYD

1 stop18h 40mAlaska Airlines

sáb. 5/179:40 pmSYD - PDX

1 stop25h 40mAlaska Airlines

Deal found 4/28

$1,158

mié. 5/78:05 amPDX - SYD

1 stop18h 40mHawaiian Airlines

mar. 5/209:40 pmSYD - PDX

1 stop17h 15mHawaiian Airlines

Deal found 4/28

$1,278

mié. 5/77:40 amPDX - SYD

2 stops32h 00mCathay Pacific

mar. 5/209:50 pmSYD - PDX

2 stops35h 34mCathay Pacific

Deal found 4/29

$1,478

mié. 5/710:13 amSEA - SYD

1 stop27h 42mAmerican Airlines

mié. 5/219:10 amSYD - SEA

2 stops21h 49mAmerican Airlines

Deal found 4/29

$1,496

One-way flights from Washington to Australia
Search for one-way flight options from Washington to Australia. Find affordable one-way fares based on user searches. Data last updated abril 30, 2025.

dom. 6/1512:30 pmSEA - SYD

3 stops33h 10mMultiple Airlines

Deal found 4/29

$467

mié. 6/1110:00 amSEA - BNE

3 stops55h 50mMultiple Airlines

Deal found 4/27

$467

dom. 6/82:55 pmSEA - SYD

1 stop23h 25mAir Canada

Deal found 4/28

$468

dom. 6/152:40 pmSEA - SYD

1 stop23h 25mQantas Airways

Deal found 4/29

$472

sáb. 6/217:00 amSEA - SYD

2 stops31h 00mUnited Airlines

Deal found 4/29

$515

mié. 6/255:40 pmSEA - SYD

1 stop19h 55mDelta

Deal found 4/28

$529

mié. 6/119:30 pmPDX - MEL

3 stops58h 25mMultiple Airlines

Deal found 4/28

$562

dom. 5/1111:35 pmSEA - MEL

1 stop37h 55mPhilippine Airlines

Deal found 4/29

$576

lun. 6/162:40 pmSEA - BNE

2 stops27h 55mQantas Airways

Deal found 4/29

$590

lun. 5/126:50 pmSEA - MEL

3 stops47h 40mMultiple Airlines

Deal found 4/29

$618

vie. 6/132:40 pmSEA - CNS

2 stops34h 55mMultiple Airlines

Deal found 4/28

$633

vie. 6/132:40 pmSEA - MEL

2 stops28h 20mQantas Airways

Deal found 4/29

$647

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandSydney

PDX - SYD

PDXSYD

Portland

mié. 8/13

9:50 pm-2:40 pm

2 stops47h 50m

Sydney Kingsford Smith

mié. 8/20

4:20 pm-10:40 pm

1 stop23h 20m

$924

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

mié. 6/11

3:55 pm-2:40 pm

1 stop29h 45m

Sydney Kingsford Smith

mié. 6/18

4:20 pm-11:24 pm

1 stop24h 04m

$1,002

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

jue. 6/5

7:55 pm-7:15 pm

2 stops30h 20m

Melbourne

jue. 6/12

11:20 am-11:24 pm

2 stops29h 04m

$1,037

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

lun. 6/2

6:52 pm-7:05 am

1 stop19h 13m

Sydney Kingsford Smith

lun. 6/9

5:45 pm-2:50 pm

1 stop38h 05m

$1,079

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

dom. 6/8

5:14 pm-7:00 am

1 stop20h 46m

Sydney Kingsford Smith

mar. 6/17

9:30 am-9:08 pm

2 stops28h 38m

$1,087

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

lun. 6/16

5:40 pm-6:35 am

1 stop19h 55m

Sydney Kingsford Smith

sáb. 6/21

9:25 am-2:45 pm

1 stop22h 20m

$1,089

PortlandSydney

PDX - SYD

PDXSYD

Portland

mar. 10/21

5:40 pm-8:45 am

2 stops21h 05m

Sydney Kingsford Smith

mar. 11/18

11:45 am-2:42 pm

2 stops21h 57m

$1,108

PortlandSydney

PDX - SYD

PDXSYD

Portland

mar. 5/27

5:33 pm-7:45 pm

1 stop33h 12m

Sydney Kingsford Smith

sáb. 6/7

9:40 pm-9:55 pm

1 stop17h 15m

$1,125

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

dom. 5/11

11:35 pm-6:30 am

1 stop37h 55m

Melbourne

dom. 5/25

8:00 am-7:15 pm

1 stop28h 15m

$1,142

PortlandSydney

PDX - SYD

PDXSYD

Portland

mar. 9/2

7:40 pm-7:20 am

1 stop18h 40m

Sydney Kingsford Smith

mar. 9/23

9:20 am-2:46 pm

1 stop22h 26m

$1,144

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 60 results

...

Best time to book a flight from Washington to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia 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 Australia

What is the cheapest month to book a flight from State of Washington to Australia?

Currently, March is the cheapest month in which you can book a flight from State of Washington to Australia (average of $1,043). Flying from State of Washington to Australia in December is currently the most expensive (average of $1,643). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WA to AU?

When flying from State of Washington to Australia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Australia by month

In terms of precipitation, rainfall in Australia ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Australia when rainfall is around 2.0 in.

Temperature in Australia by month

If weather is an important factor for your trip to Australia, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Australia

To help decide which airline to fly from Washington to Australia, see what other customers have to say about Air Tahiti Nui, EVA Air and Japan Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Air Tahiti Nui

8.8

Very good

62 reviews

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Air Tahiti Nui

8.8

Very good

62 reviews

Air Tahiti Nui

8.8

Very good

62 reviews

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

EVA Air

8.4

Very good

1,186 reviews

Air Tahiti Nui

8.8

Very good

62 reviews

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Japan Airlines

8.3

Very good

1,459 reviews

Air Tahiti Nui

8.8

Very good

62 reviews

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

China Airlines

8.3

Very good

732 reviews

Air Tahiti Nui

8.8

Very good

62 reviews

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

ANA

8.3

Very good

855 reviews

Air Tahiti Nui

8.8

Very good

62 reviews

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Related info for your journey

What are the cheapest airlines to fly from State of Washington to Australia one-way?
One-way options have recently been found by users for as low as $468 on Air Canada. Other airlines that offer cheap prices include Qantas Airways from $472 and United Airlines from $515 one-way.
Can I find deals for flights from Washington to Australia that include hotel bookings?
Yes. In addition to deals on Washington to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington to Australia?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Australia.
Can I find deals for business class flights from Washington to Australia?
Yes. Cheapflights offers flight deals from Washington to Australia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from State of Washington to Australia?
Currently, March is the cheapest month in which you can book a flight from State of Washington to Australia (average of $1,043). Flying from State of Washington to Australia in December is currently the most expensive (average of $1,643). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Washington to Australia

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$759	Average$1,378	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$807	Average$1,195	FlexibilityNo cancel fee	On-time71%
Air Canada	Cheapest$834	Average$1,195	FlexibilityNo cancel fee	On-time67%
Delta	Cheapest$854	Average$1,200	FlexibilityNo cancel fee	On-timeN/A
Hawaiian Airlines	Cheapest$858	Average$1,144	FlexibilityNo cancel fee	On-time85%
ANA	Cheapest$861	Average$1,196	FlexibilityNo cancel fee	On-time80%
Qantas Airways	Cheapest$866	Average$1,489	FlexibilityNo cancel fee	On-time74%
Alaska Airlines	Cheapest$911	Average$1,364	FlexibilityNo cancel fee	On-time75%
Singapore Airlines	Cheapest$1,210	Average$1,538	FlexibilityNo cancel fee	On-time81%
Qatar Airways	Cheapest$1,315	Average$1,712	FlexibilityNo cancel fee	On-time68%

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$467+ Cheap flights from Washington to Australia

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 6/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington to Australia with Cheapflights

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Cheap flight deals from Washington to Australia

Keep the following information in mind while searching for Washington to Australia flight deals. Data was last updated abril 30, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Washington to Australia

Cheapest flights from Washington to AustraliaExplore the most affordable flight options available from Washington to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 30, 2025.

Explore the most affordable flight options available from Washington to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 30, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington to Australia that are best for you.

Best time to book a flight from Washington to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Washington with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Washington to Australia

What is the cheapest month to book a flight from State of Washington to Australia?

What is the cheapest time of day to fly from WA to AU?

Find hourly flight availability from Washington to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated abril 30, 2025.

Rainfall in Australia by month

Plan your trip to Australia by taking into account the average rainfall totals by month.

Temperature in Australia by month

Plan your trip to Australia by taking into account the average temperature totals by month.

Reviews of airlines servicing Australia

To help decide which airline to fly from Washington to Australia, see what other customers have to say about Air Tahiti Nui, EVA Air and Japan Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Washington to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from State of Washington to Australia one-way?

Can I find deals for flights from Washington to Australia that include hotel bookings?

How can I find direct flights from Washington to Australia?

Can I find deals for business class flights from Washington to Australia?

What is the cheapest month to book a flight from State of Washington to Australia?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to Australia

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from Washington to Australia

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Cheapest flights from Washington to Australia
Explore the most affordable flight options available from Washington to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 30, 2025.