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

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 July 2026, there is 1 operator 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.

$713 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.

17:30 - 11:50

PDX

SYD

25h 20m

2 stops

13:15 - 16:35

SYD

PDX

44h 20m

3 stops

$1,412Multiple Airlines

Fri, 18 Sep - Thu, 24 Sep

10:00 - 08:45

PDX

BNE

29h 45m

1 stop

10:45 - 18:31

BNE

PDX

25h 46m

1 stop

$1,497Air Canada

Sat, 31 Oct - Sun, 8 Nov

19:45 - 07:05

PDX

BNE

18h 20m

1 stop

10:45 - 20:46

BNE

PDX

28h 01m

1 stop

$1,511Air Canada

Tue, 20 Oct - Tue, 3 Nov

19:45 - 07:05

PDX

BNE

18h 20m

1 stop

06:10 - 09:26

BNE

PDX

21h 16m

2 stops

$1,534Multiple Airlines

Mon, 31 Aug - Wed, 18 Nov

10:30 - 18:50

PDX

SYD

38h 20m

1 stop

21:40 - 20:49

SYD

PDX

17h 09m

1 stop

$1,568Alaska Airlines

Tue, 13 Oct - Tue, 27 Oct

10:30 - 18:50

PDX

SYD

39h 20m

1 stop

20:45 - 06:14

SYD

PDX

26h 29m

1 stop

$1,588Alaska Airlines

Sun, 2 Aug - Tue, 25 Aug

06:35 - 06:45

PDX

MEL

31h 10m

1 stop

09:45 - 23:59

MEL

PDX

31h 14m

1 stop

$1,711American Airlines

Fri, 14 Aug - Fri, 21 Aug

08:06 - 18:45

PDX

PER

43h 39m

2 stops

22:45 - 14:55

PER

PDX

32h 10m

2 stops

$1,959Qatar Airways

Fri, 23 Oct - Sat, 21 Nov

14:53 - 11:00

PDX

TSV

27h 07m

2 stops

17:40 - 20:48

TSV

PDX

45h 08m

3 stops

$2,644Qantas Airways

Tue, 25 Aug - Thu, 17 Dec

17:00 - 15:50

PDX

AVV

28h 50m

2 stops

08:10 - 20:49

AVV

PDX

31h 39m

2 stops

$2,816Qantas Airways

Mon, 26 Oct - Thu, 19 Nov

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Alaska Airlines flights from Portland to Australia

Our best Alaska Airlines deals on Portland to Australia flight tickets

Alaska Airlines

13 Oct

PDX10:30Portland

38h 20m

1 stop

SYD18:50Sydney Kingsford Smith

27 Oct

SYD21:40Sydney Kingsford Smith

17h 09m

1 stop

PDX20:49Portland

$1,568

Alaska Airlines

2 Aug

PDX10:30Portland

39h 20m

1 stop

SYD18:50Sydney Kingsford Smith

25 Aug

SYD20:45Sydney Kingsford Smith

26h 29m

1 stop

PDX06:14Portland

$1,588

Alaska Airlines

1 Aug

PDX07:46Portland

18h 04m

1 stop

SYD18:50Sydney Kingsford Smith

16 Aug

SYD20:45Sydney Kingsford Smith

26h 26m

1 stop

PDX06:11Portland

$1,610

Air New Zealand flights from Portland to Australia

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

Air New Zealand

20 Oct

PDX19:45Portland

22h 15m

2 stops

BNE11:00Brisbane

3 Nov

BNE06:35Brisbane

20h 51m

2 stops

PDX09:26Portland

$1,650

Air New Zealand

6 July

PDX13:14Portland

24h 41m

1 stop

SYD06:55Sydney Kingsford Smith

26 July

SYD10:20Sydney Kingsford Smith

18h 54m

1 stop

PDX12:14Portland

$1,701

Air New Zealand

31 Aug

PDX12:45Portland

25h 15m

2 stops

SYD07:00Sydney Kingsford Smith

13 Sept

SYD10:20Sydney Kingsford Smith

16h 51m

1 stop

PDX10:11Portland

$1,710

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 18/9

17:30-11:50

2 stops25h 20m

Sydney Kingsford Smith

Thu 24/9

13:15-16:35

3 stops44h 20m

$1,412

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Sat 31/10

10:00-08:45

1 stop29h 45m

Brisbane

Sun 8/11

10:45-18:31

1 stop25h 46m

$1,497

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 20/10

19:45-07:05

1 stop18h 20m

Brisbane

Tue 3/11

10:45-20:46

1 stop28h 01m

$1,511

Fastest return journey

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Mon 31/8

19:45-07:05

1 stop18h 20m

Brisbane

Wed 18/11

06:10-09:26

2 stops21h 16m

$1,534

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 13/10

10:30-18:50

1 stop38h 20m

Sydney Kingsford Smith

Tue 27/10

21:40-20:49

1 stop17h 09m

$1,568

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 2/8

10:30-18:50

1 stop39h 20m

Sydney Kingsford Smith

Tue 25/8

20:45-06:14

1 stop26h 29m

$1,588

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Fri 14/8

06:35-06:45

1 stop31h 10m

Melbourne

Fri 21/8

09:45-23:59

1 stop31h 14m

$1,711

PortlandPerth

PDX - PER

PDXPER

Portland

Fri 23/10

08:06-18:45

2 stops43h 39m

Perth

Sat 21/11

22:45-14:55

2 stops32h 10m

$1,959

PortlandTownsville

PDX - TSV

PDXTSV

Portland

Tue 25/8

14:53-11:00

2 stops27h 07m

Townsville

Thu 17/12

17:40-20:48

3 stops45h 08m

$2,644

PortlandMelbourne

PDX - AVV

PDXAVV

Portland

Mon 26/10

17:00-15:50

2 stops28h 50m

Melbourne Avalon

Thu 19/11

08:10-20:49

2 stops31h 39m

$2,816

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, April 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 $257. If you don’t want to visit Australia in April, then you should wait until March to fly from Portland, when ticket prices are also cheap, with an average price of $539.

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 $1,756 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 $1,521 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

Fastest flight time	17h 50m
Direct flights	None

The fastest flight from Portland to Australia takes 17h 50m

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 July 2026, there is 1 operator 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 $743	Free cancellation	Rating 7.4 9,926 reviews		Search United Airlines 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.