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

Alaska Airlines, Delta, and Air Canada 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.

$790 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

$1,352Air Canada

Tue, 20 Oct - Tue, 3 Nov

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

22h 35m1 stop Vancouver Intl

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

16h 41m1 stop Vancouver Intl

$1,352Air Canada

Tue, 20 Oct - Tue, 3 Nov

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

19h 35m1 stop Vancouver Intl

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

25h 46m1 stop Vancouver Intl

$1,352Air Canada

Mon, 2 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

22h 21m2 stops Brisbane Vancouver Intl

$1,410Multiple Airlines

Mon, 19 Oct - Mon, 2 Nov

19:45 - 16:35PDX Portland-MEL Melbourne

26h 50m2 stops Vancouver Intl Sydney Kingsford Smith

07:10 - 09:31MEL Melbourne-PDX Portland

20h 21m2 stops Brisbane Vancouver Intl

$1,414Multiple Airlines

Wed, 14 Oct - Wed, 21 Oct

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

24h 25m2 stops Vancouver Intl Sydney Kingsford Smith

06:05 - 09:25MEL Melbourne-PDX Portland

22h 20m2 stops Brisbane Vancouver Intl

$1,416Multiple Airlines

Sun, 7 Feb - Mon, 1 Mar

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

22h 00m1 stop San Francisco

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

25h 01m1 stop San Francisco

$1,587United Airlines

Sat, 23 Jan - Sun, 18 Apr

13:39 - 07:30PDX Portland-BNE Brisbane

23h 51m1 stop San Francisco

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

25h 01m1 stop San Francisco

$1,587United Airlines

Sat, 23 Jan - Sun, 23 May

17:04 - 14:20PDX Portland-SYD Sydney Kingsford Smith

26h 16m2 stops Los Angeles Brisbane

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

18h 23m1 stop San Francisco

$1,656Qantas Airways

Wed, 11 Nov - Fri, 4 Dec

10:30 - 06:25PDX Portland-SYD Sydney Kingsford Smith

24h 55m1 stop San Francisco

10:25 - 16:27SYD Sydney Kingsford Smith-PDX Portland

25h 02m2 stops Brisbane Los Angeles

$1,671Qantas Airways

Fri, 29 Jan - Mon, 8 Feb

Cheap last-minute flights

Enter your travel dates to find the best prices.

19:45 - 11:40PDX Portland-MEL Melbourne

22h 55m2 stops Vancouver Intl Brisbane

20:50 - 09:31MEL Melbourne-PDX Portland

29h 41m2 stops Sydney Kingsford Smith Vancouver Intl

$1,440Multiple Airlines

Sun, 23 Aug - Sat, 5 Sep

19:45 - 11:40PDX Portland-MEL Melbourne

22h 55m2 stops Vancouver Intl Brisbane

20:50 - 09:31MEL Melbourne-PDX Portland

29h 41m2 stops Sydney Kingsford Smith Vancouver Intl

$1,492Multiple Airlines

Sun, 23 Aug - Sat, 5 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

$1,640Alaska Airlines

Sat, 22 Aug - Sat, 3 Oct

11:15 - 08:15PDX Portland-MEL Melbourne

28h 00m1 stop San Francisco

10:55 - 21:06MEL Melbourne-PDX Portland

27h 11m1 stop San Francisco

$1,737United Airlines

Sun, 23 Aug - Sat, 5 Sep

11:15 - 08:15PDX Portland-MEL Melbourne

28h 00m1 stop San Francisco

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

18h 05m1 stop San Francisco

$1,737United Airlines

Mon, 24 Aug - Mon, 31 Aug

11:15 - 08:15PDX Portland-MEL Melbourne

28h 00m1 stop San Francisco

10:55 - 21:06MEL Melbourne-PDX Portland

27h 11m1 stop San Francisco

$1,738United Airlines

Sun, 23 Aug - Sat, 5 Sep

14:53 - 09:45PDX Portland-SYD Sydney Kingsford Smith

25h 52m2 stops Los Angeles Melbourne

21:25 - 22:51SYD Sydney Kingsford Smith-PDX Portland

18h 26m1 stop San Francisco

$1,789Qantas Airways

Fri, 21 Aug - Fri, 28 Aug

19:45 - 20:40PDX Portland-SYD Sydney Kingsford Smith

31h 55m2 stops Vancouver Intl Brisbane

09:20 - 19:11SYD Sydney Kingsford Smith-PDX Portland

26h 51m1 stop Vancouver Intl

$1,796Air Canada

Sat, 22 Aug - Sat, 3 Oct

06:35 - 14:10PDX Portland-AVV Melbourne Avalon

38h 35m2 stops Los Angeles Sydney Kingsford Smith

20:40 - 23:59AVV Melbourne Avalon-PDX Portland

44h 19m2 stops Brisbane Los Angeles

$4,119Qantas Airways

Sun, 23 Aug - Sat, 5 Sep

06:35 - 20:05PDX Portland-AVV Melbourne Avalon

44h 30m2 stops Los Angeles Brisbane

08:50 - 23:59AVV Melbourne Avalon-PDX Portland

32h 09m2 stops Brisbane Los Angeles

$4,755Qantas Airways

Sun, 23 Aug - Sat, 5 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

24 Jan

PDX10:30Portland

38h 15m

1 stop

SYD19:45Sydney Kingsford Smith

7 Feb

SYD21:40Sydney Kingsford Smith

18h 10m

1 stop

PDX20:50Portland

$1,575

Alaska Airlines

24 Jan

PDX10:30Portland

38h 15m

1 stop

SYD19:45Sydney Kingsford Smith

6 Feb

SYD21:40Sydney Kingsford Smith

18h 10m

1 stop

PDX20:50Portland

$1,597

Alaska Airlines

3 Sept

PDX08:00Portland

17h 50m

1 stop

SYD18:50Sydney Kingsford Smith

20 Sept

SYD20:45Sydney Kingsford Smith

26h 29m

1 stop

PDX06:14Portland

$1,599

Qantas Airways flights from Portland to Australia

Our best Qantas Airways deals on Portland to Australia flight tickets

Qantas Airways

11 Nov

PDX17:04Portland

26h 16m

2 stops

SYD14:20Sydney Kingsford Smith

4 Dec

SYD21:25Sydney Kingsford Smith

18h 23m

1 stop

PDX20:48Portland

$1,656

Qantas Airways

21 Aug

PDX14:53Portland

25h 52m

2 stops

SYD09:45Sydney Kingsford Smith

28 Aug

SYD21:25Sydney Kingsford Smith

18h 26m

1 stop

PDX22:51Portland

$1,789

Qantas Airways

14 Nov

PDX17:04Portland

29h 21m

2 stops

TSV16:25Townsville

18 Nov

TSV06:00Townsville

25h 50m

2 stops

PDX13:50Portland

$2,062

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

$1,352

Fastest return journey

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Tue 20/10

15:30-07:05

1 stop22h 35m

Brisbane

Tue 3/11

10:45-09:26

1 stop16h 41m

$1,352

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Mon 2/11

19:10-08:45

1 stop19h 35m

Brisbane

Mon 16/11

10:45-18:31

1 stop25h 46m

$1,352

PortlandMelbourne

PDX Portland - MEL Melbourne

PDXMEL

Portland

Mon 19/10

19:45-12:10

2 stops22h 25m

Melbourne

Mon 2/11

06:05-09:26

2 stops22h 21m

$1,410

PortlandMelbourne

PDX Portland - MEL Melbourne

PDXMEL

Portland

Wed 14/10

19:45-16:35

2 stops26h 50m

Melbourne

Wed 21/10

07:10-09:31

2 stops20h 21m

$1,414

PortlandMelbourne

PDX Portland - MEL Melbourne

PDXMEL

Portland

Sun 7/2

19:10-14:35

2 stops24h 25m

Melbourne

Mon 1/3

06:05-09:25

2 stops22h 20m

$1,416

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

$1,587

PortlandBrisbane

PDX Portland - BNE Brisbane

PDXBNE

Portland

Sat 23/1

13:39-07:30

1 stop23h 51m

Brisbane

Sun 23/5

10:30-18:31

1 stop25h 01m

$1,587

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 11/11

17:04-14:20

2 stops26h 16m

Sydney Kingsford Smith

Fri 4/12

21:25-20:48

1 stop18h 23m

$1,656

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Fri 29/1

10:30-06:25

1 stop24h 55m

Sydney Kingsford Smith

Mon 8/2

10:25-16:27

2 stops25h 02m

$1,671

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 $1,494. 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 $1,510.

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 $1,746 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 $1,214 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	$790
Fastest flight time	17h 50m
Direct flights	None

The best one-way flight to Australia from Portland in the past 72 hours is $790. The best return flight deal from Portland to Australia found on momondo in the last 72 hours is $1,352.

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 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 $722	Free cancellation	Rating 7.4 10,102 reviews	Search United Airlines flights
Air Canada	PriceFrom $1,250	Free cancellation	Rating 7.1 11,498 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,252	Free cancellation	Rating 7.5 1,083 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.