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

Alaska Airlines, Qantas Airways, 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 65% 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 November 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.

$705 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.

14:30 - 22:10PDX Portland-SYD Sydney Kingsford Smith

38h 40m2 stops Los Angeles Nadi

13:15 - 23:54SYD Sydney Kingsford Smith-PDX Portland

27h 39m2 stops Nadi Los Angeles

$1,614Multiple Airlines

Sat, 8 May - Sun, 16 May

13:30 - 12:35PDX Portland-SYD Sydney Kingsford Smith

28h 05m2 stops Los Angeles Nadi

14:00 - 23:54SYD Sydney Kingsford Smith-PDX Portland

27h 54m2 stops Nadi Los Angeles

$1,614Multiple Airlines

Tue, 23 Feb - Tue, 16 Mar

14:30 - 22:10PDX Portland-SYD Sydney Kingsford Smith

38h 40m2 stops Los Angeles Nadi

13:15 - 23:54SYD Sydney Kingsford Smith-PDX Portland

27h 39m2 stops Nadi Los Angeles

$1,616Multiple Airlines

Sat, 8 May - Sun, 16 May

18:30 - 20:50PDX Portland-SYD Sydney Kingsford Smith

31h 20m2 stops Los Angeles Auckland Intl

11:10 - 13:48SYD Sydney Kingsford Smith-PDX Portland

21h 38m1 stop Los Angeles

$1,633Qantas Airways

Thu, 3 Dec - Thu, 10 Dec

10:00 - 12:35PDX Portland-MEL Melbourne

32h 35m2 stops Vancouver Intl Sydney Kingsford Smith

07:00 - 14:40MEL Melbourne-PDX Portland

25h 40m2 stops Sydney Kingsford Smith Vancouver Intl

$1,868Air Canada

Sat, 20 Mar - Sat, 27 Mar

19:26 - 09:20PDX Portland-SYD Sydney Kingsford Smith

18h 54m1 stop San Francisco

11:50 - 18:23SYD Sydney Kingsford Smith-PDX Portland

25h 33m1 stop San Francisco

$1,873United Airlines

Sun, 22 Nov - Tue, 1 Dec

07:00 - 07:00PDX Portland-SYD Sydney Kingsford Smith

29h 00m1 stop Houston George Bush Intcntl

11:50 - 18:23SYD Sydney Kingsford Smith-PDX Portland

25h 33m1 stop San Francisco

$1,873United Airlines

Sun, 22 Nov - Wed, 2 Dec

13:35 - 06:25PDX Portland-SYD Sydney Kingsford Smith

21h 50m1 stop Los Angeles

11:10 - 13:48SYD Sydney Kingsford Smith-PDX Portland

21h 38m1 stop Los Angeles

$1,922Qantas Airways

Tue, 1 Dec - Tue, 8 Dec

14:30 - 11:05PDX Portland-SYD Sydney Kingsford Smith

25h 35m2 stops Los Angeles Brisbane

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

18h 23m1 stop San Francisco

$1,956Qantas Airways

Wed, 24 Feb - Sun, 28 Feb

10:10 - 07:20PDX Portland-SYD Sydney Kingsford Smith

28h 10m1 stop Vancouver Intl

09:20 - 09:26SYD Sydney Kingsford Smith-PDX Portland

17h 06m1 stop Vancouver Intl

$2,035Air Canada

Mon, 3 May - Sun, 12 Sep

Cheap last-minute flights

Enter your travel dates to find the best prices.

13:35 - 06:25PDX Portland-SYD Sydney Kingsford Smith

21h 50m1 stop Los Angeles

11:15 - 16:34SYD Sydney Kingsford Smith-PDX Portland

24h 19m1 stop Los Angeles

$1,761Alaska Airlines

Tue, 10 Nov - Thu, 19 Nov

13:35 - 06:25PDX Portland-SYD Sydney Kingsford Smith

21h 50m1 stop Los Angeles

21:25 - 22:54SYD Sydney Kingsford Smith-PDX Portland

20h 29m1 stop San Francisco

$1,761Alaska Airlines

Tue, 10 Nov - Wed, 18 Nov

14:48 - 06:25PDX Portland-SYD Sydney Kingsford Smith

20h 37m1 stop Los Angeles

11:15 - 15:48SYD Sydney Kingsford Smith-PDX Portland

23h 33m1 stop Los Angeles

$1,761Alaska Airlines

Thu, 12 Nov - Fri, 20 Nov

10:46 - 06:25PDX Portland-SYD Sydney Kingsford Smith

24h 39m1 stop Los Angeles

11:15 - 10:50SYD Sydney Kingsford Smith-PDX Portland

18h 35m1 stop Los Angeles

$1,761Alaska Airlines

Thu, 12 Nov - Tue, 17 Nov

07:01 - 06:25PDX Portland-SYD Sydney Kingsford Smith

28h 24m1 stop Los Angeles

11:15 - 12:29SYD Sydney Kingsford Smith-PDX Portland

20h 14m1 stop Los Angeles

$1,761Alaska Airlines

Tue, 10 Nov - Tue, 17 Nov

17:04 - 10:20PDX Portland-SYD Sydney Kingsford Smith

22h 16m2 stops Los Angeles Brisbane

21:25 - 20:47SYD Sydney Kingsford Smith-PDX Portland

18h 22m1 stop San Francisco

$1,770Qantas Airways

Wed, 11 Nov - Wed, 18 Nov

19:26 - 09:20PDX Portland-SYD Sydney Kingsford Smith

18h 54m1 stop San Francisco

11:50 - 20:26SYD Sydney Kingsford Smith-PDX Portland

27h 36m1 stop San Francisco

$1,875United Airlines

Tue, 10 Nov - Tue, 1 Dec

07:00 - 07:00PDX Portland-SYD Sydney Kingsford Smith

29h 00m1 stop Houston George Bush Intcntl

09:15 - 12:17SYD Sydney Kingsford Smith-PDX Portland

22h 02m1 stop Houston George Bush Intcntl

$1,875United Airlines

Tue, 10 Nov - Wed, 2 Dec

10:47 - 09:05PDX Portland-SYD Sydney Kingsford Smith

27h 18m2 stops Chicago O'Hare Intl Los Angeles

09:15 - 12:17SYD Sydney Kingsford Smith-PDX Portland

22h 02m1 stop Houston George Bush Intcntl

$1,881United Airlines

Tue, 10 Nov - Wed, 2 Dec

10:47 - 09:20PDX Portland-SYD Sydney Kingsford Smith

27h 33m2 stops Chicago O'Hare Intl San Francisco

11:50 - 12:15SYD Sydney Kingsford Smith-PDX Portland

19h 25m1 stop San Francisco

$1,881United Airlines

Tue, 10 Nov - Tue, 1 Dec

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Qantas Airways flights from Portland to Australia

Our best Qantas Airways deals on Portland to Australia flight tickets

Qantas Airways

3 Dec

PDX18:30Portland

31h 20m

2 stops

SYD20:50Sydney Kingsford Smith

10 Dec

SYD11:10Sydney Kingsford Smith

21h 38m

1 stop

PDX13:48Portland

$1,633

Qantas Airways

11 Nov

PDX17:04Portland

22h 16m

2 stops

SYD10:20Sydney Kingsford Smith

18 Nov

SYD21:25Sydney Kingsford Smith

18h 22m

1 stop

PDX20:47Portland

$1,770

Qantas Airways

18 Nov

PDX10:46Portland

24h 39m

1 stop

SYD06:25Sydney Kingsford Smith

30 Nov

SYD11:10Sydney Kingsford Smith

31h 34m

1 stop

PDX23:44Portland

$1,959

Alaska Airlines flights from Portland to Australia

Our best Alaska Airlines deals on Portland to Australia flight tickets

Alaska Airlines

27 Jan

PDX10:30Portland

24h 55m

2 stops

SYD06:25Sydney Kingsford Smith

10 Feb

SYD21:25Sydney Kingsford Smith

38h 25m

1 stop

PDX16:50Portland

$1,664

Alaska Airlines

23 Feb

PDX07:00Portland

28h 25m

1 stop

SYD06:25Sydney Kingsford Smith

16 Mar

SYD11:15Sydney Kingsford Smith

27h 16m

1 stop

PDX20:31Portland

$1,689

Alaska Airlines

26 Jan

PDX09:30Portland

25h 55m

2 stops

SYD06:25Sydney Kingsford Smith

7 Feb

SYD21:25Sydney Kingsford Smith

18h 25m

1 stop

PDX20:50Portland

$1,694

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sat 8/5

14:30-22:10

2 stops38h 40m

Sydney Kingsford Smith

Sun 16/5

13:15-23:54

2 stops27h 39m

$1,614

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Tue 23/2

13:30-12:35

2 stops28h 05m

Sydney Kingsford Smith

Tue 16/3

14:00-23:54

2 stops27h 54m

$1,614

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sat 8/5

14:30-22:10

2 stops38h 40m

Sydney Kingsford Smith

Sun 16/5

13:15-23:54

2 stops27h 39m

$1,616

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Thu 3/12

18:30-20:50

2 stops31h 20m

Sydney Kingsford Smith

Thu 10/12

11:10-13:48

1 stop21h 38m

$1,633

PortlandMelbourne

PDX Portland - MEL Melbourne

PDXMEL

Portland

Sat 20/3

10:00-12:35

2 stops32h 35m

Melbourne

Sat 27/3

07:00-14:40

2 stops25h 40m

$1,868

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 22/11

19:26-09:20

1 stop18h 54m

Sydney Kingsford Smith

Tue 1/12

11:50-18:23

1 stop25h 33m

$1,873

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 22/11

07:00-07:00

1 stop29h 00m

Sydney Kingsford Smith

Wed 2/12

11:50-18:23

1 stop25h 33m

$1,873

Fastest return journey

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Tue 1/12

13:35-06:25

1 stop21h 50m

Sydney Kingsford Smith

Tue 8/12

11:10-13:48

1 stop21h 38m

$1,922

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 24/2

14:30-11:05

2 stops25h 35m

Sydney Kingsford Smith

Sun 28/2

21:25-20:48

1 stop18h 23m

$1,956

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 3/5

10:10-07:20

1 stop28h 10m

Sydney Kingsford Smith

Sun 12/9

09:20-09:26

1 stop17h 06m

$2,035

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 $1,543. 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 $1,646.

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 $1,825 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 $1,641 on momondo.

Can stopping save me money on Portland to Australia flights?

You could potentially save up to 14% 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	$705
Fastest flight time	18h 11m
Direct flights	None

The best one-way flight to Australia from Portland in the past 72 hours is $705. The best return flight deal from Portland to Australia found on momondo in the last 72 hours is $1,614.

The fastest flight from Portland to Australia takes 18h 11m

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 November 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
Air Canada	PriceFrom $1,292	Free cancellation	Rating 7.1 11,876 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,294	Free cancellation	Rating 7.5 1,123 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $2,451	Free cancellation	Rating 7.3 10,471 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.