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

United Airlines, Air Canada, and Alaska 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.

$766 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.

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

23h 30m1 stop Vancouver Intl

19:50 - 09:25BNE Brisbane-PDX Portland

31h 35m2 stops Sydney Kingsford Smith Vancouver Intl

$1,271Multiple Airlines

Mon, 15 Feb - Mon, 1 Mar

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

19h 35m1 stop Vancouver Intl

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

16h 41m1 stop Vancouver Intl

$1,276Air Canada

Mon, 8 Feb - Mon, 22 Feb

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

19h 35m1 stop Vancouver Intl

10:45 - 18:30BNE Brisbane-PDX Portland

25h 45m1 stop Vancouver Intl

$1,276Air Canada

Mon, 15 Feb - Mon, 1 Mar

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

29h 40m1 stop Vancouver Intl

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

25h 46m1 stop Vancouver Intl

$1,276Air Canada

Sat, 31 Oct - Sun, 8 Nov

19:10 - 14:35PDX Portland-MEL Melbourne

24h 25m2 stops Vancouver Intl Sydney Kingsford Smith

08:10 - 09:26MEL Melbourne-PDX Portland

20h 16m2 stops Brisbane Vancouver Intl

$1,286Multiple Airlines

Mon, 9 Nov - Mon, 16 Nov

19:45 - 12:10PDX Portland-MEL Melbourne

22h 25m2 stops Vancouver Intl Sydney Kingsford Smith

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

21h 21m2 stops Brisbane Vancouver Intl

$1,319Multiple Airlines

Mon, 19 Oct - Mon, 26 Oct

17:32 - 09:00PDX Portland-SYD Sydney Kingsford Smith

20h 28m1 stop Los Angeles

07:05 - 17:11SYD Sydney Kingsford Smith-PDX Portland

29h 06m2 stops Auckland Intl Los Angeles

$1,341Qantas Airways

Mon, 1 Feb - Sat, 13 Feb

14:34 - 09:00PDX Portland-SYD Sydney Kingsford Smith

23h 26m1 stop Los Angeles

07:05 - 13:26SYD Sydney Kingsford Smith-PDX Portland

25h 21m2 stops Auckland Intl Los Angeles

$1,376Qantas Airways

Tue, 9 Feb - Tue, 16 Feb

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

$1,570United 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 - 21:13BNE Brisbane-PDX Portland

27h 53m2 stops San Francisco Denver Intl

$1,570United Airlines

Sat, 17 Oct - Sat, 31 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

19:45 - 11:55PDX Portland-BNE Brisbane

23h 10m2 stops Vancouver Intl Sydney Kingsford Smith

10:00 - 19:11BNE Brisbane-PDX Portland

26h 11m1 stop Vancouver Intl

$1,426Multiple Airlines

Thu, 10 Sep - Sun, 27 Sep

19:45 - 07:30PDX Portland-BNE Brisbane

42h 45m2 stops Vancouver Intl Sydney Kingsford Smith

10:00 - 19:11BNE Brisbane-PDX Portland

26h 11m1 stop Vancouver Intl

$1,484Air Canada

Thu, 10 Sep - Sun, 27 Sep

19:45 - 13:15PDX Portland-BNE Brisbane

24h 30m2 stops Vancouver Intl Sydney Kingsford Smith

20:40 - 09:31BNE Brisbane-PDX Portland

29h 51m2 stops Sydney Kingsford Smith Vancouver Intl

$1,505Multiple Airlines

Thu, 10 Sep - Sun, 27 Sep

19:45 - 13:15PDX Portland-BNE Brisbane

24h 30m2 stops Vancouver Intl Sydney Kingsford Smith

20:40 - 09:31BNE Brisbane-PDX Portland

29h 51m2 stops Sydney Kingsford Smith Vancouver Intl

$1,506Multiple Airlines

Thu, 10 Sep - Sun, 27 Sep

12:01 - 05:00PDX Portland-BNE Brisbane

23h 59m2 stops Dallas/Fort Worth Los Angeles

20:35 - 22:06BNE Brisbane-PDX Portland

18h 31m1 stop Los Angeles

$1,553American Airlines

Thu, 10 Sep - Sun, 27 Sep

19:45 - 08:30PDX Portland-BNE Brisbane

43h 45m2 stops Vancouver Intl Sydney Kingsford Smith

20:45 - 09:31BNE Brisbane-PDX Portland

29h 46m2 stops Sydney Kingsford Smith Vancouver Intl

$1,568Air Canada

Thu, 10 Sep - Sun, 27 Sep

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

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

10:30 - 21:10BNE Brisbane-PDX Portland

27h 40m2 stops San Francisco Denver Intl

$1,571United Airlines

Thu, 10 Sep - Sun, 27 Sep

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

26h 12m1 stop San Francisco

10:55 - 14:36MEL Melbourne-PDX Portland

20h 41m1 stop San Francisco

$1,711United Airlines

Thu, 10 Sep - Thu, 17 Sep

15:32 - 08:15PDX Portland-MEL Melbourne

23h 43m1 stop San Francisco

10:55 - 12:00MEL Melbourne-PDX Portland

18h 05m1 stop San Francisco

$1,711United Airlines

Thu, 10 Sep - Fri, 18 Sep

19:15 - 08:15PDX Portland-MEL Melbourne

20h 00m1 stop San Francisco

10:55 - 14:57MEL Melbourne-PDX Portland

21h 02m1 stop San Francisco

$1,711United Airlines

Thu, 10 Sep - Wed, 16 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

21 Sept

PDX08:00Portland

17h 50m

1 stop

SYD18:50Sydney Kingsford Smith

18 Oct

SYD20:45Sydney Kingsford Smith

27h 34m

1 stop

PDX06:19Portland

$1,535

Alaska Airlines

20 Sept

PDX17:35Portland

32h 15m

1 stop

SYD18:50Sydney Kingsford Smith

18 Oct

SYD20:45Sydney Kingsford Smith

27h 34m

1 stop

PDX06:19Portland

$1,559

Alaska Airlines

23 Sept

PDX08:00Portland

17h 50m

1 stop

SYD18:50Sydney Kingsford Smith

22 Oct

SYD20:45Sydney Kingsford Smith

18h 05m

1 stop

PDX20:50Portland

$1,604

Qantas Airways flights from Portland to Australia

Our best Qantas Airways deals on Portland to Australia flight tickets

Qantas Airways

1 Feb

PDX17:32Portland

20h 28m

1 stop

SYD09:00Sydney Kingsford Smith

13 Feb

SYD07:05Sydney Kingsford Smith

29h 06m

2 stops

PDX17:11Portland

$1,341

Qantas Airways

9 Feb

PDX14:34Portland

23h 26m

1 stop

SYD09:00Sydney Kingsford Smith

16 Feb

SYD07:05Sydney Kingsford Smith

25h 21m

2 stops

PDX13:26Portland

$1,376

Qantas Airways

23 Feb

PDX17:40Portland

32h 10m

2 stops

SYD20:50Sydney Kingsford Smith

16 Mar

SYD11:20Sydney Kingsford Smith

24h 00m

1 stop

PDX17:20Portland

$1,442

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Mon 15/2

15:15-08:45

1 stop23h 30m

Brisbane

Mon 1/3

19:50-09:25

2 stops31h 35m

$1,271

Fastest return journey

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Mon 8/2

19:10-08:45

1 stop19h 35m

Brisbane

Mon 22/2

10:45-09:26

1 stop16h 41m

$1,276

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Mon 15/2

19:10-08:45

1 stop19h 35m

Brisbane

Mon 1/3

10:45-18:30

1 stop25h 45m

$1,276

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

$1,276

PortlandMelbourne

PDX Portland - MEL Melbourne

PDXMEL

Portland

Mon 9/11

19:10-14:35

2 stops24h 25m

Melbourne

Mon 16/11

08:10-09:26

2 stops20h 16m

$1,286

PortlandMelbourne

PDX Portland - MEL Melbourne

PDXMEL

Portland

Mon 19/10

19:45-12:10

2 stops22h 25m

Melbourne

Mon 26/10

06:05-09:26

2 stops21h 21m

$1,319

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 1/2

17:32-09:00

1 stop20h 28m

Sydney Kingsford Smith

Sat 13/2

07:05-17:11

2 stops29h 06m

$1,341

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Tue 9/2

14:34-09:00

1 stop23h 26m

Sydney Kingsford Smith

Tue 16/2

07:05-13:26

2 stops25h 21m

$1,376

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

$1,570

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

$1,570

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 $1,485. 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 $1,545.

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 $1,734 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 $1,424 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	$766
Fastest flight time	19h 35m
Direct flights	None

The best one-way flight to Australia from Portland in the past 72 hours is $766. The best return flight deal from Portland to Australia found on momondo in the last 72 hours is $1,271.

The fastest flight from Portland to Australia takes 19h 35m

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 $710	Free cancellation	Rating 7.4 10,188 reviews	Search United Airlines flights
Air Canada	PriceFrom $1,230	Free cancellation	Rating 7.1 11,605 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,232	Free cancellation	Rating 7.5 1,091 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.