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

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

Which airlines fly to Australia?

United Airlines, Air Canada and Qantas Airways 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 August 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.

$814 Cheap Flights from Portland to Australia in 2026

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

$1,338Air Canada

Tue, 20 Oct - Tue, 3 Nov

19:45 - 07:05PDX Portland-BNE Brisbane

18h 20m1 stop Vancouver Intl

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

16h 41m1 stop Vancouver Intl

$1,338Air Canada

Tue, 20 Oct - Tue, 3 Nov

10:00 - 08:45PDX Portland-BNE Brisbane

29h 45m1 stop Vancouver Intl

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

25h 46m1 stop Vancouver Intl

$1,338Air Canada

Sat, 31 Oct - Sun, 8 Nov

19:10 - 13:50PDX Portland-MEL Melbourne

23h 40m2 stops Vancouver Intl Brisbane

06:05 - 09:26MEL Melbourne-PDX Portland

22h 21m2 stops Brisbane Vancouver Intl

$1,414Multiple Airlines

Sun, 1 Nov - Sun, 8 Nov

19:10 - 13:50PDX Portland-MEL Melbourne

23h 40m2 stops Vancouver Intl Brisbane

06:05 - 09:26MEL Melbourne-PDX Portland

22h 21m2 stops Brisbane Vancouver Intl

$1,414Multiple Airlines

Sun, 1 Nov - Mon, 9 Nov

19:10 - 13:35PDX Portland-MEL Melbourne

23h 25m2 stops Vancouver Intl Sydney Kingsford Smith

07:25 - 09:25MEL Melbourne-PDX Portland

21h 00m2 stops Sydney Kingsford Smith Vancouver Intl

$1,415Multiple Airlines

Tue, 16 Feb - Tue, 9 Mar

19:49 - 07:30PDX Portland-BNE Brisbane

17h 41m1 stop San Francisco

10:30 - 12:25BNE Brisbane-PDX Portland

18h 55m1 stop San Francisco

$1,571United Airlines

Sat, 23 Jan - Sun, 18 Apr

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

22h 00m1 stop San Francisco

10:30 - 18:31BNE Brisbane-PDX Portland

25h 01m1 stop San Francisco

$1,571United Airlines

Sat, 23 Jan - Sun, 18 Apr

17:32 - 11:05PDX Portland-SYD Sydney Kingsford Smith

22h 33m2 stops Los Angeles Brisbane

21:25 - 22:33SYD Sydney Kingsford Smith-PDX Portland

18h 08m1 stop San Francisco

$1,602Qantas Airways

Fri, 5 Feb - Tue, 4 May

14:46 - 06:25PDX Portland-SYD Sydney Kingsford Smith

20h 39m1 stop San Francisco

21:55 - 13:26SYD Sydney Kingsford Smith-PDX Portland

32h 31m2 stops Brisbane Los Angeles

$1,627Qantas Airways

Fri, 5 Feb - Tue, 4 May

Cheap last-minute flights

Enter your travel dates to find the best prices.

08:00 - 18:50PDX Portland-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

20:45 - 06:14SYD Sydney Kingsford Smith-PDX Portland

26h 29m1 stop Honolulu

$1,521Alaska Airlines

Wed, 26 Aug - Tue, 8 Sep

08:00 - 18:50PDX Portland-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

20:45 - 20:50SYD Sydney Kingsford Smith-PDX Portland

17h 05m1 stop Honolulu

$1,523Alaska Airlines

Wed, 26 Aug - Tue, 8 Sep

08:00 - 18:50PDX Portland-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

20:45 - 06:14SYD Sydney Kingsford Smith-PDX Portland

26h 29m1 stop Honolulu

$1,577Alaska Airlines

Wed, 26 Aug - Fri, 28 Aug

23:02 - 06:30PDX Portland-BNE Brisbane

38h 28m2 stops Chicago O'Hare Intl San Francisco

11:40 - 18:20BNE Brisbane-PDX Portland

24h 40m1 stop San Francisco

$1,578United Airlines

Tue, 25 Aug - Thu, 17 Dec

23:02 - 06:30PDX Portland-BNE Brisbane

38h 28m2 stops Chicago O'Hare Intl San Francisco

11:20 - 18:20BNE Brisbane-PDX Portland

25h 00m1 stop San Francisco

$1,578United Airlines

Tue, 25 Aug - Thu, 17 Dec

23:02 - 06:30PDX Portland-BNE Brisbane

38h 28m2 stops Chicago O'Hare Intl San Francisco

07:35 - 12:03BNE Brisbane-PDX Portland

22h 28m2 stops Sydney Kingsford Smith San Francisco

$1,612United Airlines

Tue, 25 Aug - Thu, 17 Dec

06:35 - 07:05PDX Portland-SYD Sydney Kingsford Smith

31h 30m1 stop Los Angeles

15:45 - 23:59SYD Sydney Kingsford Smith-PDX Portland

25h 14m2 stops Brisbane Los Angeles

$1,906Qantas Airways

Wed, 26 Aug - Fri, 28 Aug

19:45 - 07:20PDX Portland-SYD Sydney Kingsford Smith

18h 35m1 stop Vancouver Intl

10:00 - 09:31SYD Sydney Kingsford Smith-PDX Portland

40h 31m2 stops Brisbane Vancouver Intl

$1,945Air Canada

Thu, 27 Aug - Mon, 7 Sep

19:45 - 07:05PDX Portland-BNE Brisbane

18h 20m1 stop Vancouver Intl

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

21h 56m1 stop Vancouver Intl

$1,977Air Canada

Tue, 25 Aug - Thu, 17 Dec

06:35 - 07:05PDX Portland-SYD Sydney Kingsford Smith

31h 30m1 stop Los Angeles

17:30 - 13:25SYD Sydney Kingsford Smith-PDX Portland

36h 55m2 stops Brisbane Los Angeles

$2,093Qantas Airways

Tue, 25 Aug - Mon, 7 Sep

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Alaska Airlines flights from Portland to Australia

Our best Alaska Airlines deals on Portland to Australia flight tickets

Alaska Airlines

26 Aug

PDX08:00Portland

17h 50m

1 stop

SYD18:50Sydney Kingsford Smith

8 Sept

SYD20:45Sydney Kingsford Smith

26h 29m

1 stop

PDX06:14Portland

$1,521

Alaska Airlines

26 Aug

PDX08:00Portland

17h 50m

1 stop

SYD18:50Sydney Kingsford Smith

8 Sept

SYD20:45Sydney Kingsford Smith

26h 29m

1 stop

PDX06:14Portland

$1,522

Alaska Airlines

30 Sept

PDX08:00Portland

17h 50m

1 stop

SYD18:50Sydney Kingsford Smith

20 Oct

SYD20:45Sydney Kingsford Smith

27h 34m

1 stop

PDX06:19Portland

$1,538

Air Canada flights from Portland to Australia

Our best Air Canada deals on Portland to Australia flight tickets

Air Canada

8 Feb

PDX19:10Portland

19h 35m

1 stop

BNE08:45Brisbane

22 Feb

BNE10:45Brisbane

16h 41m

1 stop

PDX09:26Portland

$1,338

Air Canada

18 Oct

PDX19:45Portland

18h 20m

1 stop

BNE07:05Brisbane

1 Nov

BNE10:45Brisbane

21h 56m

1 stop

PDX15:41Portland

$1,352

Air Canada

22 Sept

PDX19:45Portland

18h 20m

1 stop

BNE07:05Brisbane

20 Oct

BNE19:45Brisbane

30h 46m

2 stops

PDX09:31Portland

$1,386

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

$1,338

Fastest return journey

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Tue 20/10

19:45-07:05

1 stop18h 20m

Brisbane

Tue 3/11

10:45-09:26

1 stop16h 41m

$1,338

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Sat 31/10

10:00-08:45

1 stop29h 45m

Brisbane

Sun 8/11

10:45-18:31

1 stop25h 46m

$1,338

PortlandMelbourne

PDX Portland - MEL Melbourne

PDXMEL

Portland

Sun 1/11

19:10-13:50

2 stops23h 40m

Melbourne

Sun 8/11

06:05-09:26

2 stops22h 21m

$1,414

PortlandMelbourne

PDX Portland - MEL Melbourne

PDXMEL

Portland

Sun 1/11

19:10-13:50

2 stops23h 40m

Melbourne

Mon 9/11

06:05-09:26

2 stops22h 21m

$1,414

PortlandMelbourne

PDX Portland - MEL Melbourne

PDXMEL

Portland

Tue 16/2

19:10-13:35

2 stops23h 25m

Melbourne

Tue 9/3

07:25-09:25

2 stops21h 00m

$1,415

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Sat 23/1

19:49-07:30

1 stop17h 41m

Brisbane

Sun 18/4

10:30-12:25

1 stop18h 55m

$1,571

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Sat 23/1

15:30-07:30

1 stop22h 00m

Brisbane

Sun 18/4

10:30-18:31

1 stop25h 01m

$1,571

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Fri 5/2

17:32-11:05

2 stops22h 33m

Sydney Kingsford Smith

Tue 4/5

21:25-22:33

1 stop18h 08m

$1,602

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Fri 5/2

14:46-06:25

1 stop20h 39m

Sydney Kingsford Smith

Tue 4/5

21:55-13:26

2 stops32h 31m

$1,627

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, February 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 $1,476. If you don’t want to visit Australia in February, then you should wait until June to fly from Portland, when ticket prices are also cheap, with an average price of $1,495.

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 $1,730 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 $1,202 on momondo.

Can stopping save me money on Portland to Australia flights?

You could potentially save up to 32% 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	$814
Fastest flight time	17h 41m
Direct flights	None

The best one-way flight to Australia from Portland in the past 72 hours is $814. The best return flight deal from Portland to Australia found on momondo in the last 72 hours is $1,338.

The fastest flight from Portland to Australia takes 17h 41m

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 August 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 $715	Free cancellation	Rating 7.4 10,114 reviews	Search United Airlines flights
Air Canada	PriceFrom $1,237	Free cancellation	Rating 7.1 11,525 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,239	Free cancellation	Rating 7.5 1,085 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.