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

American Airlines, Air New Zealand, 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 May 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.

$813 Cheap Flights from Portland to Australia in 2026

1 adult

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Find the cheapest flights from Portland to Australia

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

14:39 - 06:45

PDX

MEL

23h 06m

1 stop

09:45 - 20:48

MEL

PDX

28h 03m

1 stop

$1,394Multiple Airlines

Fri, 7 Aug - Fri, 14 Aug

21:27 - 06:45

PDX

MEL

40h 18m

1 stop

09:45 - 13:44

MEL

PDX

20h 59m

1 stop

$1,422Multiple Airlines

Sat, 1 Aug - Sun, 9 Aug

19:45 - 07:05

PDX

BNE

18h 20m

1 stop

10:45 - 18:31

BNE

PDX

25h 46m

1 stop

$1,450Air Canada

Tue, 20 Oct - Tue, 3 Nov

15:15 - 08:45

PDX

BNE

23h 30m

1 stop

10:45 - 14:41

BNE

PDX

21h 56m

1 stop

$1,464Air Canada

Sun, 1 Nov - Sun, 15 Nov

17:37 - 06:45

PDX

MEL

20h 08m

1 stop

09:45 - 16:36

MEL

PDX

23h 51m

1 stop

$1,497Qantas Airways

Tue, 11 Aug - Thu, 20 Aug

15:27 - 06:45

PDX

MEL

22h 18m

1 stop

13:35 - 21:36

MEL

PDX

25h 01m

1 stop

$1,513American Airlines

Wed, 1 Jul - Wed, 19 Aug

15:27 - 06:45

PDX

MEL

22h 18m

1 stop

09:45 - 16:38

MEL

PDX

23h 53m

2 stops

$1,520American Airlines

Wed, 17 Jun - Fri, 17 Jul

19:49 - 10:00

PDX

MEL

19h 11m

1 stop

13:00 - 12:25

MEL

PDX

18h 25m

1 stop

$1,528United Airlines

Sun, 1 Nov - Fri, 13 Nov

11:16 - 12:25

PDX

OOL

32h 09m

2 stops

06:00 - 12:07

OOL

PDX

23h 07m

2 stops

$1,815United Airlines

Mon, 6 Jul - Tue, 14 Jul

17:00 - 14:30

PDX

TSV

27h 30m

2 stops

06:00 - 20:31

TSV

PDX

32h 31m

2 stops

$2,047Qantas Airways

Thu, 5 Nov - Mon, 9 Nov

Alaska Airlines flights from Portland to Australia

Our best Alaska Airlines deals on Portland to Australia flight tickets

Alaska Airlines

3 Aug

PDX07:46Portland

18h 04m

1 stop

SYD18:50Sydney Kingsford Smith

25 Aug

SYD20:45Sydney Kingsford Smith

17h 01m

1 stop

PDX20:46Portland

$1,544

Alaska Airlines

26 July

PDX17:32Portland

32h 18m

1 stop

SYD18:50Sydney Kingsford Smith

9 Aug

SYD20:45Sydney Kingsford Smith

26h 26m

1 stop

PDX06:11Portland

$1,566

Alaska Airlines

2 Aug

PDX17:32Portland

32h 18m

1 stop

SYD18:50Sydney Kingsford Smith

23 Aug

SYD20:45Sydney Kingsford Smith

26h 29m

1 stop

PDX06:14Portland

$1,569

Qantas Airways flights from Portland to Australia

Our best Qantas Airways deals on Portland to Australia flight tickets

Qantas Airways

11 Aug

PDX17:37Portland

20h 08m

1 stop

MEL06:45Melbourne

20 Aug

MEL09:45Melbourne

23h 51m

1 stop

PDX16:36Portland

$1,497

Qantas Airways

20 Oct

PDX17:00Portland

19h 00m

1 stop

BNE05:00Brisbane

2 Dec

BNE13:10Brisbane

18h 16m

1 stop

PDX13:26Portland

$1,525

Qantas Airways

11 Aug

PDX17:36Portland

19h 49m

1 stop

SYD06:25Sydney Kingsford Smith

26 Aug

SYD06:25Sydney Kingsford Smith

31h 25m

2 stops

PDX20:50Portland

$1,587

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Fri 7/8

14:39-06:45

1 stop23h 06m

Melbourne

Fri 14/8

09:45-20:48

1 stop28h 03m

$1,394

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sat 1/8

21:27-06:45

1 stop40h 18m

Melbourne

Sun 9/8

09:45-13:44

1 stop20h 59m

$1,422

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 20/10

19:45-07:05

1 stop18h 20m

Brisbane

Tue 3/11

10:45-18:31

1 stop25h 46m

$1,450

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Sun 1/11

15:15-08:45

1 stop23h 30m

Brisbane

Sun 15/11

10:45-14:41

1 stop21h 56m

$1,464

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Tue 11/8

17:37-06:45

1 stop20h 08m

Melbourne

Thu 20/8

09:45-16:36

1 stop23h 51m

$1,497

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Wed 1/7

15:27-06:45

1 stop22h 18m

Melbourne

Wed 19/8

13:35-21:36

1 stop25h 01m

$1,513

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Wed 17/6

15:27-06:45

1 stop22h 18m

Melbourne

Fri 17/7

09:45-16:38

2 stops23h 53m

$1,520

Fastest return journey

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sun 1/11

19:49-10:00

1 stop19h 11m

Melbourne

Fri 13/11

13:00-12:25

1 stop18h 25m

$1,528

PortlandCoolangatta

PDX - OOL

PDXOOL

Portland

Mon 6/7

11:16-12:25

2 stops32h 09m

Coolangatta Gold Coast

Tue 14/7

06:00-12:07

2 stops23h 07m

$1,815

PortlandTownsville

PDX - TSV

PDXTSV

Portland

Thu 5/11

17:00-14:30

2 stops27h 30m

Townsville

Mon 9/11

06:00-20:31

2 stops32h 31m

$2,047

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, September 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 $195. If you don’t want to visit Australia in September, then you should wait until April to fly from Portland, when ticket prices are also cheap, with an average price of $248.

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 $1,693 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 $1,422 on momondo.

Can stopping save me money on Portland to Australia flights?

You could potentially save up to 28% 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 May 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 $717	Free cancellation	Rating 7.4 9,751 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.