What is the cheapest airline that flies from Portland to Australia?

Air Canada, Delta, and United Airlines are the most popular carriers operating from Portland to Australia

Which airlines fly to Australia?

United Airlines, Qantas Airways and Air Canada are the top three most popular airlines that fly to Australia from Portland according to our data. United Airlines is the first choice among our users, with 69% of people opting to fly with this airline when travelling to Australia. Keep in mind that there are 3 different airlines that fly to Australia on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Portland Airport to Australia?

Prices for flights from Portland Airport to Australia refresh daily.

How many operators does momondo search for flights from Portland Airport to Australia?

As of September 2026, there are 3 operators available to choose from for flights from Portland Airport to Australia.

How old do you have to be to fly from Portland Airport to Australia?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Australia.

What documentation or ID do you need to fly to Australia?

The travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$794 Cheap Flights from Portland to Australia in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland to Australia

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

10:10 - 07:05PDX Portland-BNE Brisbane

27h 55m1 stop Vancouver Intl

10:45 - 09:26BNE Brisbane-PDX Portland

16h 41m1 stop Vancouver Intl

$1,323Air Canada

Tue, 20 Oct - Tue, 3 Nov

19:15 - 08:45PDX Portland-BNE Brisbane

19h 30m1 stop Vancouver Intl

10:45 - 18:31BNE Brisbane-PDX Portland

25h 46m1 stop Vancouver Intl

$1,323Air Canada

Mon, 2 Nov - Mon, 16 Nov

10:05 - 08:45PDX Portland-BNE Brisbane

29h 40m1 stop Vancouver Intl

10:45 - 18:31BNE Brisbane-PDX Portland

25h 46m1 stop Vancouver Intl

$1,323Air Canada

Sat, 31 Oct - Sun, 8 Nov

19:15 - 15:30PDX Portland-BNE Brisbane

26h 15m2 stops Vancouver Intl Sydney Kingsford Smith

10:45 - 14:41BNE Brisbane-PDX Portland

21h 56m1 stop Vancouver Intl

$1,349Multiple Airlines

Mon, 2 Nov - Mon, 16 Nov

15:30 - 07:05PDX Portland-BNE Brisbane

22h 35m1 stop Vancouver Intl

06:10 - 09:26BNE Brisbane-PDX Portland

21h 16m2 stops Sydney Kingsford Smith Vancouver Intl

$1,352Multiple Airlines

Tue, 20 Oct - Tue, 3 Nov

19:10 - 08:45PDX Portland-BNE Brisbane

19h 35m1 stop Vancouver Intl

06:05 - 09:26BNE Brisbane-PDX Portland

21h 21m2 stops Sydney Kingsford Smith Vancouver Intl

$1,352Multiple Airlines

Mon, 8 Feb - Mon, 22 Feb

23:30 - 06:30PDX Portland-BNE Brisbane

38h 00m2 stops Chicago O'Hare Intl San Francisco

10:20 - 21:13BNE Brisbane-PDX Portland

27h 53m2 stops San Francisco Denver Intl

$1,601United Airlines

Sat, 17 Oct - Sat, 31 Oct

23:30 - 06:30PDX Portland-BNE Brisbane

38h 00m2 stops Chicago O'Hare Intl San Francisco

10:20 - 14:37BNE Brisbane-PDX Portland

21h 17m1 stop San Francisco

$1,601United Airlines

Sat, 17 Oct - Sat, 31 Oct

14:53 - 06:25PDX Portland-SYD Sydney Kingsford Smith

21h 32m1 stop San Francisco

11:05 - 13:35SYD Sydney Kingsford Smith-PDX Portland

20h 30m2 stops Brisbane Los Angeles

$1,680Qantas Airways

Tue, 20 Oct - Tue, 27 Oct

17:40 - 10:20PDX Portland-SYD Sydney Kingsford Smith

21h 40m2 stops Los Angeles Brisbane

21:25 - 20:48SYD Sydney Kingsford Smith-PDX Portland

18h 23m1 stop San Francisco

$1,743Qantas Airways

Thu, 18 Feb - Wed, 3 Mar

Cheap last-minute flights

Enter your travel dates to find the best prices.

10:56 - 08:15PDX Portland-MEL Melbourne

28h 19m1 stop San Francisco

11:55 - 12:05MEL Melbourne-PDX Portland

18h 10m1 stop San Francisco

$1,745United Airlines

Sat, 26 Sep - Sun, 4 Oct

10:56 - 08:15PDX Portland-MEL Melbourne

28h 19m1 stop San Francisco

11:55 - 12:05MEL Melbourne-PDX Portland

18h 10m1 stop San Francisco

$1,745United Airlines

Tue, 29 Sep - Sun, 4 Oct

20:44 - 07:50PDX Portland-MEL Melbourne

42h 06m2 stops Seattle/Tacoma Intl Los Angeles

11:00 - 16:37MEL Melbourne-PDX Portland

23h 37m1 stop Los Angeles

$1,745Delta

Tue, 29 Sep - Sun, 4 Oct

20:44 - 07:50PDX Portland-MEL Melbourne

42h 06m2 stops Seattle/Tacoma Intl Los Angeles

11:00 - 17:09MEL Melbourne-PDX Portland

24h 09m2 stops Los Angeles Seattle/Tacoma Intl

$1,745Delta

Tue, 29 Sep - Sun, 4 Oct

10:56 - 08:15PDX Portland-MEL Melbourne

28h 19m1 stop San Francisco

10:55 - 14:27MEL Melbourne-PDX Portland

20h 32m1 stop San Francisco

$1,745United Airlines

Tue, 29 Sep - Sat, 3 Oct

13:03 - 08:15PDX Portland-MEL Melbourne

26h 12m1 stop San Francisco

11:55 - 12:05MEL Melbourne-PDX Portland

18h 10m1 stop San Francisco

$1,745United Airlines

Sun, 27 Sep - Sun, 18 Oct

20:44 - 07:50PDX Portland-MEL Melbourne

42h 06m2 stops Seattle/Tacoma Intl Los Angeles

11:00 - 18:47MEL Melbourne-PDX Portland

25h 47m1 stop Los Angeles

$1,745Delta

Sun, 27 Sep - Sun, 18 Oct

15:33 - 07:05PDX Portland-SYD Sydney Kingsford Smith

22h 32m1 stop Los Angeles

15:15 - 22:06SYD Sydney Kingsford Smith-PDX Portland

23h 51m2 stops Brisbane Los Angeles

$2,167Qantas Airways

Sun, 27 Sep - Tue, 29 Sep

13:53 - 07:05PDX Portland-SYD Sydney Kingsford Smith

24h 12m1 stop Los Angeles

17:50 - 22:06SYD Sydney Kingsford Smith-PDX Portland

21h 16m1 stop Los Angeles

$2,181Qantas Airways

Sun, 27 Sep - Tue, 29 Sep

06:30 - 11:55PDX Portland-ADL Adelaide

36h 55m2 stops Los Angeles Sydney Kingsford Smith

06:00 - 13:35ADL Adelaide-PDX Portland

25h 05m2 stops Melbourne Los Angeles

$2,279Qantas Airways

Tue, 29 Sep - Mon, 5 Oct

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Alaska Airlines flights from Portland to Australia

Our best Alaska Airlines deals on Portland to Australia flight tickets

Alaska Airlines

23 Feb

PDX17:50Portland

30h 55m

1 stop

SYD19:45Sydney Kingsford Smith

16 Mar

SYD21:40Sydney Kingsford Smith

26h 20m

1 stop

PDX06:00Portland

$1,533

Alaska Airlines

23 Feb

PDX17:50Portland

30h 55m

1 stop

SYD19:45Sydney Kingsford Smith

16 Mar

SYD21:40Sydney Kingsford Smith

26h 20m

1 stop

PDX06:00Portland

$1,573

Alaska Airlines

14 Feb

PDX17:50Portland

30h 55m

1 stop

SYD19:45Sydney Kingsford Smith

28 Feb

SYD21:40Sydney Kingsford Smith

18h 10m

1 stop

PDX20:50Portland

$1,574

Air New Zealand flights from Portland to Australia

Our best Air New Zealand deals on Portland to Australia flight tickets

Air New Zealand

16 Feb

PDX07:00Portland

30h 35m

2 stops

SYD08:35Sydney Kingsford Smith

1 Mar

SYD11:50Sydney Kingsford Smith

27h 55m

2 stops

PDX20:45Portland

$1,593

Air New Zealand

13 Feb

PDX19:10Portland

42h 25m

2 stops

SYD08:35Sydney Kingsford Smith

2 Mar

SYD09:55Sydney Kingsford Smith

27h 36m

2 stops

PDX18:31Portland

$1,611

Air New Zealand

16 Nov

PDX15:15Portland

22h 20m

2 stops

SYD08:35Sydney Kingsford Smith

22 Nov

SYD11:50Sydney Kingsford Smith

25h 34m

2 stops

PDX18:24Portland

$1,624

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Tue 20/10

10:10-07:05

1 stop27h 55m

Brisbane

Tue 3/11

10:45-09:26

1 stop16h 41m

$1,323

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Mon 2/11

19:15-08:45

1 stop19h 30m

Brisbane

Mon 16/11

10:45-18:31

1 stop25h 46m

$1,323

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Sat 31/10

10:05-08:45

1 stop29h 40m

Brisbane

Sun 8/11

10:45-18:31

1 stop25h 46m

$1,323

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Mon 2/11

19:15-15:30

2 stops26h 15m

Brisbane

Mon 16/11

10:45-14:41

1 stop21h 56m

$1,349

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Tue 20/10

15:30-07:05

1 stop22h 35m

Brisbane

Tue 3/11

06:10-09:26

2 stops21h 16m

$1,352

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Mon 8/2

19:10-08:45

1 stop19h 35m

Brisbane

Mon 22/2

06:05-09:26

2 stops21h 21m

$1,352

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Sat 17/10

23:30-06:30

2 stops38h 00m

Brisbane

Sat 31/10

10:20-21:13

2 stops27h 53m

$1,601

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Sat 17/10

23:30-06:30

2 stops38h 00m

Brisbane

Sat 31/10

10:20-14:37

1 stop21h 17m

$1,601

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Tue 20/10

14:53-06:25

1 stop21h 32m

Sydney Kingsford Smith

Tue 27/10

11:05-13:35

2 stops20h 30m

$1,680

Fastest return journey

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Thu 18/2

17:40-10:20

2 stops21h 40m

Sydney Kingsford Smith

Wed 3/3

21:25-20:48

1 stop18h 23m

$1,743

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Portland to Australia

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 month to fly to Australia?

In general, June is the cheapest month to fly from Portland to Australia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,516. If you don’t want to visit Australia in June, then you should wait until April to fly from Portland, when ticket prices are also cheap, with an average price of $1,584.

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

You are more likely to see cheaper flights to Australia from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $1,765 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Portland for as low as $1,454 on momondo.

Can stopping save me money on Portland to Australia flights?

You could potentially save up to 38% on your flight if you consider stops on a Portland to Australia flight.

Cheap Portland to Australia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Australia

Best price found	$794
Fastest flight time	19h 30m
Direct flights	None

The best one-way flight to Australia from Portland in the past 72 hours is $794. The best return flight deal from Portland to Australia found on momondo in the last 72 hours is $1,323.

The fastest flight from Portland to Australia takes 19h 30m

There are no direct flights from Portland to Australia. There are no popular flight routes from Portland to Australia.

Search flight deals

Frequently asked questions about flying from Portland to Australia

When did momondo last update prices for flights from Portland Airport to Australia?
Prices for flights from Portland Airport to Australia refresh daily.
How many operators does momondo search for flights from Portland Airport to Australia?
As of September 2026, there are 3 operators available to choose from for flights from Portland Airport to Australia.
How old do you have to be to fly from Portland Airport to Australia?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Australia.
What documentation or ID do you need to fly to Australia?
The travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Portland to Australia

Compare and see reviews for airlines that fly from Portland to Australia with momondo

Airline	Rating	Free cancellation	Price
United Airlines	PriceFrom $725	Free cancellation	Rating 7.4 10,233 reviews	Search United Airlines flights
Air Canada	PriceFrom $1,255	Free cancellation	Rating 7.1 11,676 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,257	Free cancellation	Rating 7.5 1,101 reviews	Search Qantas Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Australia?

Finding the right flight to Australia from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Australia quick and easy, saving you time and money.

Can I find flights from Portland to Australia with flexible booking policies on momondo?

Flights from Portland to Australia with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Portland to Australia?

Once all potential Portland to Australia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for Portland to Australia 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.