How long is the flight from Portland to Australia?

Departing from Portland to Australia will take you 18h 40m. Portland and Australia are separated by a distance of 12350 km. This flight may include one or multiple stops. Find deals

What are the cheapest airlines to fly from Portland to Australia one-way?

The cheapet airlines for a one-way flight from Portland to Australia are Air Canada ($859), ANA ($886), and United Airlines ($888). Find deals

In terms of precipitation, rainfall in Australia ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Australia when rainfall is around 50.0 mm. Find deals

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 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

What are the most popular routes from Portland to Australia?

When deciding which route to take from Portland to Australia, consider Portland - Sydney Kingsford Smith, Portland - Melbourne or Portland - Brisbane, as they are the most popular.

How far in advance should I book a flight from Portland to Australia?

Users have found that booking a flight from Portland to Australia at least 40 days early can save you up to 26% on average compared to booking a flight this week. If booking 40 days before your flight isn’t an option for you, users have found flights from Portland to Australia for as little as $1,442 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $2,395 for flights departing within the next 3 days.

What is the cheapest month to fly from Portland to Australia?

The best pricing can be found in the month of September. Prices to Australia from Portland average $1,760. You can even find prices in September for less than $1,760, as users have found deals to Australia from as low as $1,255. The month of December appears to be one of the more expensive times to travel to Australia from Portland. Flying in the targeted month can save you up to 29%.

What airport do you fly from for flights from Portland to Australia?

If you book a flight to Australia from Portland, you will be flying from Portland, which is the city’s only airport. Portland (PDX) is located 9.7 km from the centre of Portland.

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

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

How can I find direct flights from Portland to Australia?

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

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

Yes. Cheapflights offers flight deals from Portland 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.

$806+ Flights from Portland to Australia

Cheap flight deals from Portland to Australia

Round-trip from	$1,402
One-way from	$806
Popular in	December
Cheapest in	September
Average price	$1,671

Air Canada
2/9-10/9
2 total stops
45h 21m total
Portland to Australia

Search Deals

21/10
3 total stops
43h 35m total
Portland to Australia

Search Deals

Highest demand for flights based on searches. 9% potential increase in price ($287 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($74 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Portland to Australia

Cheapest flights from Portland to Australia
Explore the most affordable flight options available from Portland to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 August 2025.

Tue 2/915:25PDX - SYD

1 stop22h 55mAir Canada

Wed 10/909:20SYD - PDX

1 stop22h 26mAir Canada

Deal found 19/8$1,402

Mon 1/915:25PDX - SYD

1 stop22h 55mAir Canada

Wed 10/909:20SYD - PDX

1 stop26h 26mAir Canada

Deal found 19/8$1,419

Tue 2/915:25PDX - SYD

1 stop22h 55mAir Canada

Tue 23/907:30SYD - PDX

2 stops24h 16mAir Canada

Deal found 19/8$1,425

Tue 16/915:25PDX - MEL

2 stops26h 40mAir Canada

Tue 23/906:00MEL - PDX

2 stops29h 46mAir Canada

Deal found 19/8$1,456

Tue 2/910:00PDX - MEL

2 stops32h 05mAir Canada

Wed 10/906:00MEL - PDX

2 stops25h 46mAir Canada

Deal found 19/8$1,462

Thu 28/810:05PDX - SYD

1 stop28h 15mAir Canada

Sun 7/909:20SYD - PDX

1 stop22h 26mAir Canada

Deal found 19/8$1,472

Tue 2/915:25PDX - MEL

2 stops27h 10mAir Canada

Tue 9/906:00MEL - PDX

2 stops25h 46mAir Canada

Deal found 19/8$1,479

Mon 1/919:40PDX - SYD

1 stop18h 40mAir Canada

Thu 11/909:20SYD - PDX

1 stop17h 01mAir Canada

Deal found 19/8$1,489

Wed 10/908:31PDX - SYD

1 stop29h 34mAmerican Airlines

Mon 15/909:10SYD - PDX

1 stop22h 13mAmerican Airlines

Deal found 18/8$1,496

Wed 29/1017:41PDX - MEL

2 stops25h 19mMultiple Airlines

Wed 5/1114:15MEL - PDX

2 stops25h 35mMultiple Airlines

Deal found 18/8$1,498

Tue 2/914:05PDX - SYD

1 stop23h 50mAmerican Airlines

Wed 10/912:10SYD - PDX

1 stop21h 54mAmerican Airlines

Deal found 19/8$1,498

Sun 31/806:15PDX - SYD

1 stop32h 05mAir Canada

Tue 9/909:20SYD - PDX

1 stop30h 41mAir Canada

Deal found 19/8$1,499

Best flights from Portland to Australia
Discover carefully curated flight deals from Portland to Australia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 August 2025.

Tue 23/919:40PDX - SYD

1 stop18h 40mAir Canada

Tue 30/909:20SYD - PDX

1 stop26h 26mAir Canada

Deal found 18/8$1,402

Wed 29/1017:41PDX - MEL

2 stops25h 19mMultiple Airlines

Wed 5/1114:15MEL - PDX

2 stops25h 35mMultiple Airlines

Deal found 18/8$1,498

Thu 4/913:45PDX - MEL

1 stop25h 30mUnited Airlines

Thu 11/910:55MEL - PDX

1 stop18h 48mUnited Airlines

Deal found 19/8$1,504

Tue 20/117:30PDX - BNE

1 stop18h 30mQantas Airways

Sat 31/119:25BNE - PDX

1 stop19h 10mQantas Airways

Deal found 18/8$1,567

Tue 16/913:24PDX - PER

2 stops31h 31mQatar Airways

Wed 24/922:45PER - PDX

2 stops40h 30mQatar Airways

Deal found 17/8$2,009

Tue 14/1007:45PDX - PER

2 stops47h 55mCathay Pacific

Mon 3/1100:15PER - PDX

2 stops32h 57mCathay Pacific

Deal found 18/8$2,145

Sun 21/910:00PDX - SYD

1 stop28h 20mAir Canada

Tue 30/909:20SYD - PDX

1 stop22h 26mAir Canada

Deal found 20/8$1,402

Fri 5/917:40PDX - MEL

1 stop21h 35mUnited Airlines

Thu 11/910:55MEL - PDX

1 stop24h 34mUnited Airlines

Deal found 19/8$1,504

Tue 2/915:25PDX - SYD

1 stop22h 55mAir Canada

Wed 10/909:20SYD - PDX

1 stop22h 26mAir Canada

Deal found 19/8$1,402

Sat 30/813:45PDX - MEL

1 stop25h 30mUnited Airlines

Thu 11/910:55MEL - PDX

1 stop26h 42mUnited Airlines

Deal found 19/8$1,504

Tue 2/910:00PDX - SYD

1 stop28h 20mAir Canada

Tue 23/909:20SYD - PDX

1 stop30h 41mAir Canada

Deal found 19/8$1,402

Sat 4/1010:30PDX - OOL

2 stops30h 15mMultiple Airlines

Sun 26/1010:55OOL - PDX

2 stops28h 39mMultiple Airlines

Deal found 19/8$1,808

Last-minute flights from Portland to Australia
Discover last-minute flight deals from Portland to Australia. Data last updated 20 August 2025 and is based on user searches.

Mon 25/820:10PDX - SYD

2 stops30h 05mMultiple Airlines

Thu 6/1112:25SYD - PDX

2 stops25h 05mMultiple Airlines

Deal found 19/8$1,513

Mon 25/813:01PDX - SYD

2 stops24h 59mUnited Airlines

Tue 4/1112:10SYD - PDX

2 stops28h 16mUnited Airlines

Deal found 19/8$1,529

Mon 25/808:30PDX - SYD

2 stops29h 30mUnited Airlines

Fri 7/1112:10SYD - PDX

1 stop17h 43mUnited Airlines

Deal found 19/8$1,606

Tue 26/815:25PDX - SYD

2 stops25h 55mMultiple Airlines

Wed 3/906:45SYD - PDX

2 stops19h 36mMultiple Airlines

Deal found 19/8$1,590

Thu 28/810:05PDX - SYD

1 stop28h 15mAir Canada

Sun 7/909:20SYD - PDX

1 stop22h 26mAir Canada

Deal found 19/8$1,472

Thu 28/810:05PDX - SYD

1 stop28h 15mMultiple Airlines

Sun 7/906:00SYD - PDX

2 stops20h 21mMultiple Airlines

Deal found 19/8$1,535

Thu 28/819:40PDX - MEL

2 stops22h 45mMultiple Airlines

Tue 23/906:00MEL - PDX

2 stops34h 01mMultiple Airlines

Deal found 19/8$1,572

Sat 30/813:45PDX - MEL

1 stop25h 30mUnited Airlines

Thu 11/910:55MEL - PDX

1 stop26h 42mUnited Airlines

Deal found 19/8$1,504

Sat 30/815:46PDX - MEL

1 stop23h 29mUnited Airlines

Fri 12/910:55MEL - PDX

1 stop38h 51mUnited Airlines

Deal found 19/8$1,513

Sat 30/817:45PDX - SYD

2 stops43h 50mDelta

Wed 10/909:25SYD - PDX

2 stops22h 13mDelta

Deal found 19/8$1,549

Sat 30/806:15PDX - SYD

1 stop32h 05mAir Canada

Mon 8/909:20SYD - PDX

1 stop17h 01mAir Canada

Deal found 19/8$1,577

Tue 9/910:00PDX - BNE

1 stop28h 05mAir Canada

Tue 16/910:20BNE - PDX

1 stop21h 26mAir Canada

Deal found 19/8$1,604

One-way flights from Portland to Australia
Search for one-way flight options from Portland to Australia. Find affordable one-way fares based on user searches. Data last updated 20 August 2025.

Tue 21/1010:30PDX - MEL

3 stops43h 35mMultiple Airlines

Deal found 20/8$806

Sun 15/207:40PDX - SYD

2 stops27h 30mMultiple Airlines

Deal found 19/8$829

Tue 21/1014:30PDX - AVV

3 stops38h 20mMultiple Airlines

Deal found 20/8$852

Sun 15/209:50PDX - SYD

1 stop28h 45mAir Canada

Deal found 19/8$859

Wed 3/906:51PDX - BNE

3 stops58h 04mMultiple Airlines

Deal found 18/8$869

Tue 21/1010:30PDX - BNE

3 stops40h 00mMultiple Airlines

Deal found 18/8$883

Mon 16/209:50PDX - SYD

2 stops39h 25mANA

Deal found 19/8$886

Thu 23/1011:05PDX - MEL

1 stop28h 10mUnited Airlines

Deal found 19/8$888

Wed 29/1014:45PDX - SYD

1 stop24h 15mQantas Airways

Deal found 17/8$893

Mon 1/909:59PDX - BNE

2 stops26h 26mAmerican Airlines

Deal found 18/8$894

Fri 19/915:44PDX - BNE

1 stop21h 46mUnited Airlines

Deal found 18/8$896

Mon 1/919:40PDX - BNE

1 stop18h 25mAir Canada

Deal found 18/8$900

Fly from

Fly to

Route

Depart

Return

Price

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 23/9

19:40-07:20

1 stop18h 40m

Sydney Kingsford Smith

Tue 30/9

09:20-18:46

1 stop26h 26m

$1,402

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 21/9

10:00-07:20

1 stop28h 20m

Sydney Kingsford Smith

Tue 30/9

09:20-14:46

1 stop22h 26m

$1,402

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 2/9

15:25-07:20

1 stop22h 55m

Sydney Kingsford Smith

Wed 10/9

09:20-14:46

1 stop22h 26m

$1,402

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 2/9

10:00-07:20

1 stop28h 20m

Sydney Kingsford Smith

Tue 23/9

09:20-23:01

1 stop30h 41m

$1,402

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 1/9

15:25-07:20

1 stop22h 55m

Sydney Kingsford Smith

Wed 10/9

09:20-18:46

1 stop26h 26m

$1,419

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 3/9

15:25-07:20

1 stop22h 55m

Sydney Kingsford Smith

Tue 9/9

09:20-14:46

1 stop22h 26m

$1,419

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 1/9

19:40-07:20

1 stop18h 40m

Sydney Kingsford Smith

Tue 9/9

09:20-09:21

1 stop17h 01m

$1,419

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Tue 16/9

15:25-11:05

2 stops26h 40m

Melbourne

Tue 23/9

06:00-18:46

2 stops29h 46m

$1,456

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Tue 2/9

10:00-11:05

2 stops32h 05m

Melbourne

Wed 10/9

06:00-14:46

2 stops25h 46m

$1,462

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Mon 8/9

15:25-12:20

2 stops27h 55m

Melbourne

Mon 15/9

21:40-09:21

2 stops28h 41m

$1,462

Flights are sorted by cheapest return flights first.

Deals found on 20/8

Showing 1-10 of 60 results

...

Best time to book a flight from Portland to Australia

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

Estimated return 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 Portland to Australia

What is the cheapest month to book a flight from Portland to Australia?

Currently, May is the cheapest month in which you can book a flight from Portland to Australia (average of $129). Flying from Portland to Australia in October is currently the most expensive (average of $171). 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 PDX to AU?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland to Australia as you normally would.

Reviews of airlines servicing Australia

Check out reviews from past customers who have flown with United Airlines from Portland to Australia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,928 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

United Airlines

7.4

Good

8,928 reviews

United Airlines

7.4

Good

8,928 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

What airport do you fly from for flights from Portland to Australia?
If you book a flight to Australia from Portland, you will be flying from Portland, which is the city’s only airport. Portland (PDX) is located 9.7 km from the centre of Portland.
How long is the flight from Portland to Australia?
Departing from Portland to Australia will take you 18h 40m. Portland and Australia are separated by a distance of 12350 km. This flight may include one or multiple stops.
What are the cheapest airlines to fly from Portland to Australia one-way?
The cheapet airlines for a one-way flight from Portland to Australia are Air Canada ($859), ANA ($886), and United Airlines ($888).
What are the most popular routes from Portland to Australia?
When deciding which route to take from Portland to Australia, consider Portland - Sydney Kingsford Smith, Portland - Melbourne or Portland - Brisbane, as they are the most popular.
Can I find deals for flights from Portland to Australia that include hotel bookings?
Yes. In addition to deals on Portland to Australia flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Portland to Australia?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Australia.
Can I find deals for business class flights from Portland to Australia?
Yes. Cheapflights offers flight deals from Portland 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 Portland to Australia?
Currently, May is the cheapest month in which you can book a flight from Portland to Australia (average of $129). Flying from Portland to Australia in October is currently the most expensive (average of $171). 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 airline flying from Portland to Australia

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$1,312	Average$1,982	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from Portland to Australia?

Cheapflights helps you search for flights from Portland to Australia via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Portland to Australia?

Cheapflights helps you find that perfect flight to Australia from Portland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Portland to Australia with no change fees?

Yes, we can. To see specific flights from Portland to Australia with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Portland to Australia become cheaper?

Yes, Cheapflights offers price alerts on Portland to Australia flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from Portland to Australia from $806

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 21/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portland to Australia

Keep the following information in mind while searching for Portland to Australia flight deals. Data was last updated 20 August 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portland to Australia

Cheapest flights from Portland to AustraliaExplore the most affordable flight options available from Portland to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 August 2025.

Explore the most affordable flight options available from Portland to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 August 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Portland to Australia

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

Cheapflights Insights

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

What is the cheapest month to book a flight from Portland to Australia?

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

Find hourly flight availability from Portland 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 20 August 2025.

Reviews of airlines servicing Australia

Check out reviews from past customers who have flown with United Airlines from Portland to Australia to help guide your decision. You can also see how each airline stacks up 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 Portland to Australia. 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 from for flights from Portland to Australia?

How long is the flight from Portland to Australia?

What are the cheapest airlines to fly from Portland to Australia one-way?

What are the most popular routes from Portland to Australia?

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

How can I find direct flights from Portland to Australia?

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

What is the cheapest month to book a flight from Portland 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 Portland to Australia

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

Top airline flying from Portland to Australia

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portland to Australia?

Why should you use Cheapflights to find cheap flight tickets from Portland to Australia?

Can Cheapflights find flights from Portland to Australia with no change fees?

Can Cheapflights notify me if prices for flights from Portland to Australia become cheaper?

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Cheapest flights from Portland to Australia
Explore the most affordable flight options available from Portland to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 August 2025.