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.

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

Alaska Airlines 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 October 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.

$759 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.

15:15 - 09:35PDX Portland-SYD Sydney Kingsford Smith

23h 20m1 stop Vancouver Intl

10:20 - 14:40SYD Sydney Kingsford Smith-PDX Portland

22h 20m1 stop Vancouver Intl

$1,389Air Canada

Tue, 23 Feb - Tue, 16 Mar

19:10 - 09:35PDX Portland-SYD Sydney Kingsford Smith

19h 25m1 stop Vancouver Intl

11:20 - 09:26SYD Sydney Kingsford Smith-PDX Portland

17h 06m1 stop Vancouver Intl

$1,389Air Canada

Wed, 17 Feb - Tue, 23 Feb

15:15 - 09:35PDX Portland-SYD Sydney Kingsford Smith

23h 20m1 stop Vancouver Intl

10:20 - 18:30SYD Sydney Kingsford Smith-PDX Portland

26h 10m1 stop Vancouver Intl

$1,389Air Canada

Sun, 28 Feb - Wed, 17 Mar

19:10 - 09:35PDX Portland-SYD Sydney Kingsford Smith

19h 25m1 stop Vancouver Intl

06:20 - 09:25SYD Sydney Kingsford Smith-PDX Portland

21h 05m2 stops Brisbane Vancouver Intl

$1,405Multiple Airlines

Sun, 28 Feb - Wed, 17 Mar

17:40 - 20:50PDX Portland-SYD Sydney Kingsford Smith

32h 10m2 stops Los Angeles Auckland Intl

11:20 - 20:31SYD Sydney Kingsford Smith-PDX Portland

28h 11m1 stop Los Angeles

$1,414Qantas Airways

Mon, 1 Mar - Wed, 10 Mar

19:10 - 09:35PDX Portland-SYD Sydney Kingsford Smith

19h 25m1 stop Vancouver Intl

06:20 - 09:25SYD Sydney Kingsford Smith-PDX Portland

21h 05m2 stops Brisbane Vancouver Intl

$1,459Multiple Airlines

Wed, 3 Mar - Fri, 19 Mar

19:10 - 09:35PDX Portland-SYD Sydney Kingsford Smith

19h 25m1 stop Vancouver Intl

11:20 - 14:41SYD Sydney Kingsford Smith-PDX Portland

22h 21m1 stop Vancouver Intl

$1,495Air New Zealand

Mon, 15 Feb - Tue, 23 Feb

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

20h 28m1 stop Los Angeles

21:00 - 20:50SYD Sydney Kingsford Smith-PDX Portland

18h 50m1 stop Las Vegas Harry Reid Intl

$1,554Qantas Airways

Mon, 1 Feb - Fri, 12 Feb

12:45 - 07:00PDX Portland-SYD Sydney Kingsford Smith

23h 15m1 stop Houston George Bush Intcntl

11:50 - 14:36SYD Sydney Kingsford Smith-PDX Portland

21h 46m1 stop San Francisco

$1,598United Airlines

Mon, 1 Feb - Wed, 10 Feb

15:40 - 09:20PDX Portland-SYD Sydney Kingsford Smith

22h 40m1 stop San Francisco

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

25h 28m1 stop San Francisco

$1,598United Airlines

Sun, 31 Jan - Wed, 10 Feb

Cheap last-minute flights

Enter your travel dates to find the best prices.

17:30 - 06:25PDX Portland-SYD Sydney Kingsford Smith

17h 55m1 stop San Francisco

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

21h 38m1 stop Los Angeles

$1,584Multiple Airlines

Sun, 1 Nov - Tue, 1 Dec

18:04 - 06:25PDX Portland-SYD Sydney Kingsford Smith

41h 21m1 stop Los Angeles

21:40 - 06:05SYD Sydney Kingsford Smith-PDX Portland

27h 25m1 stop Honolulu

$1,593Multiple Airlines

Wed, 4 Nov - Thu, 12 Nov

18:04 - 06:25PDX Portland-SYD Sydney Kingsford Smith

41h 21m1 stop Los Angeles

21:40 - 06:20SYD Sydney Kingsford Smith-PDX Portland

27h 40m2 stops Honolulu Kahului

$1,593Multiple Airlines

Wed, 4 Nov - Thu, 12 Nov

19:15 - 09:10PDX Portland-SYD Sydney Kingsford Smith

43h 55m2 stops Vancouver Intl Brisbane

11:20 - 20:46SYD Sydney Kingsford Smith-PDX Portland

28h 26m1 stop Vancouver Intl

$1,715Air Canada

Sat, 31 Oct - Wed, 4 Nov

07:05 - 08:35PDX Portland-SYD Sydney Kingsford Smith

31h 30m1 stop Vancouver Intl

11:20 - 09:26SYD Sydney Kingsford Smith-PDX Portland

17h 06m1 stop Vancouver Intl

$1,755Air Canada

Sat, 31 Oct - Wed, 4 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

$1,759United Airlines

Sun, 1 Nov - Tue, 1 Dec

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

18h 54m1 stop San Francisco

11:50 - 10:18SYD Sydney Kingsford Smith-PDX Portland

17h 28m1 stop San Francisco

$1,759United Airlines

Sun, 1 Nov - Wed, 25 Nov

10:46 - 09:00PDX Portland-SYD Sydney Kingsford Smith

27h 14m1 stop Los Angeles

11:10 - 18:27SYD Sydney Kingsford Smith-PDX Portland

26h 17m1 stop Los Angeles

$1,995Qantas Airways

Sun, 1 Nov - Sat, 28 Nov

19:15 - 08:40PDX Portland-SYD Sydney Kingsford Smith

43h 25m2 stops Vancouver Intl Brisbane

11:20 - 20:46SYD Sydney Kingsford Smith-PDX Portland

28h 26m1 stop Vancouver Intl

$1,996Air Canada

Sat, 31 Oct - Wed, 4 Nov

13:35 - 09:00PDX Portland-SYD Sydney Kingsford Smith

24h 25m1 stop Los Angeles

11:10 - 18:27SYD Sydney Kingsford Smith-PDX Portland

26h 17m1 stop Los Angeles

$2,111Qantas Airways

Tue, 3 Nov - Sat, 28 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

23 Feb

PDX17:50Portland

30h 55m

1 stop

SYD19:45Sydney Kingsford Smith

16 Mar

SYD21:40Sydney Kingsford Smith

26h 20m

1 stop

PDX06:00Portland

$1,540

Alaska Airlines

23 Feb

PDX17:50Portland

30h 55m

1 stop

SYD19:45Sydney Kingsford Smith

16 Mar

SYD21:40Sydney Kingsford Smith

26h 20m

1 stop

PDX06:00Portland

$1,597

Alaska Airlines

18 Feb

PDX08:30Portland

26h 55m

1 stop

SYD06:25Sydney Kingsford Smith

3 Mar

SYD21:25Sydney Kingsford Smith

18h 23m

1 stop

PDX20:48Portland

$1,649

Air Canada flights from Portland to Australia

Our best Air Canada deals on Portland to Australia flight tickets

Air Canada

10 Feb

PDX15:15Portland

23h 20m

1 stop

SYD09:35Sydney Kingsford Smith

17 Feb

SYD11:20Sydney Kingsford Smith

26h 11m

1 stop

PDX18:31Portland

$1,389

Air Canada

10 Feb

PDX15:15Portland

23h 20m

1 stop

SYD09:35Sydney Kingsford Smith

17 Feb

SYD08:30Sydney Kingsford Smith

19h 56m

2 stops

PDX09:26Portland

$1,412

Air Canada

16 Feb

PDX07:00Portland

31h 35m

1 stop

SYD09:35Sydney Kingsford Smith

24 Feb

SYD11:20Sydney Kingsford Smith

26h 11m

1 stop

PDX18:31Portland

$1,428

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Tue 23/2

15:15-09:35

1 stop23h 20m

Sydney Kingsford Smith

Tue 16/3

10:20-14:40

1 stop22h 20m

$1,389

Fastest return journey

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 17/2

19:10-09:35

1 stop19h 25m

Sydney Kingsford Smith

Tue 23/2

11:20-09:26

1 stop17h 06m

$1,389

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 28/2

15:15-09:35

1 stop23h 20m

Sydney Kingsford Smith

Wed 17/3

10:20-18:30

1 stop26h 10m

$1,389

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 28/2

19:10-09:35

1 stop19h 25m

Sydney Kingsford Smith

Wed 17/3

06:20-09:25

2 stops21h 05m

$1,405

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 1/3

17:40-20:50

2 stops32h 10m

Sydney Kingsford Smith

Wed 10/3

11:20-20:31

1 stop28h 11m

$1,414

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 3/3

19:10-09:35

1 stop19h 25m

Sydney Kingsford Smith

Fri 19/3

06:20-09:25

2 stops21h 05m

$1,459

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 15/2

19:10-09:35

1 stop19h 25m

Sydney Kingsford Smith

Tue 23/2

11:20-14:41

1 stop22h 21m

$1,495

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 1/2

17:32-09:00

1 stop20h 28m

Sydney Kingsford Smith

Fri 12/2

21:00-20:50

1 stop18h 50m

$1,554

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 1/2

12:45-07:00

1 stop23h 15m

Sydney Kingsford Smith

Wed 10/2

11:50-14:36

1 stop21h 46m

$1,598

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 31/1

15:40-09:20

1 stop22h 40m

Sydney Kingsford Smith

Wed 10/2

11:50-18:18

1 stop25h 28m

$1,598

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 $1,506. 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 $1,591.

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 $1,783 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 $1,601 on momondo.

Can stopping save me money on Portland to Australia flights?

You could potentially save up to 38% 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	$759
Fastest flight time	18h 05m
Direct flights	None

The best one-way flight to Australia from Portland in the past 72 hours is $759. The best return flight deal from Portland to Australia found on momondo in the last 72 hours is $1,389.

The fastest flight from Portland to Australia takes 18h 05m

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 October 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 $1,261	Free cancellation	Rating 7.1 11,833 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,263	Free cancellation	Rating 7.5 1,121 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $2,392	Free cancellation	Rating 7.3 10,451 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.