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Cheap flights from Portland to Australia from $543

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Australia departing on 29/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Cheap return flights

Enter your travel dates to find the best prices.
Air Canada Logo
09:50 - 08:45PDX-BNE
28h 55m1 stop
Air Canada Logo
10:45 - 18:30BNE-PDX
25h 45m1 stop
$1,315Air Canada
Find Deal
Tue, 20 Jan - Sat, 31 Jan
Air Canada Logo
19:00 - 08:45PDX-BNE
19h 45m1 stop
Air Canada Logo
10:45 - 18:30BNE-PDX
25h 45m1 stop
$1,321Air Canada
Find Deal
Wed, 26 Nov - Wed, 3 Dec
Multiple Airlines Logo
09:50 - 08:45PDX-BNE
28h 55m1 stop
Multiple Airlines Logo
06:10 - 09:15BNE-PDX
21h 05m2 stops
$1,340Multiple Airlines
Find Deal
Tue, 20 Jan - Sat, 31 Jan
Multiple Airlines Logo
19:00 - 08:45PDX-BNE
19h 45m1 stop
Multiple Airlines Logo
06:10 - 09:15BNE-PDX
21h 05m2 stops
$1,342Multiple Airlines
Find Deal
Tue, 20 Jan - Sat, 31 Jan
Qantas Airways Logo
17:30 - 09:30PDX-MEL
21h 00m1 stop
Qantas Airways Logo
12:00 - 22:36MEL-PDX
28h 36m1 stop
$1,413Qantas Airways
Find Deal
Sat, 7 Mar - Fri, 13 Mar
Qantas Airways Logo
14:40 - 09:30PDX-MEL
23h 50m1 stop
Qantas Airways Logo
12:00 - 16:28MEL-PDX
23h 28m1 stop
$1,442Qantas Airways
Find Deal
Tue, 24 Feb - Sat, 7 Mar
American Airlines Logo
11:48 - 09:30PDX-MEL
26h 42m2 stops
American Airlines Logo
12:00 - 22:36MEL-PDX
28h 36m1 stop
$1,448American Airlines
Find Deal
Sat, 7 Mar - Fri, 13 Mar
American Airlines Logo
15:50 - 09:30PDX-MEL
23h 40m1 stop
American Airlines Logo
09:45 - 22:31MEL-PDX
29h 46m1 stop
$1,451American Airlines
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Sat, 21 Mar - Thu, 9 Apr
United Airlines Logo
13:35 - 09:00PDX-MEL
25h 25m1 stop
United Airlines Logo
10:55 - 18:36MEL-PDX
24h 41m1 stop
$1,537United Airlines
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Sun, 22 Mar - Fri, 10 Apr
United Airlines Logo
19:30 - 09:00PDX-MEL
19h 30m1 stop
United Airlines Logo
10:55 - 17:38MEL-PDX
23h 43m2 stops
$1,545United Airlines
Find Deal
Sun, 22 Mar - Wed, 8 Apr

Alaska Airlines flights from Portland to Australia

Our best Alaska Airlines deals on Portland to Australia flight tickets
Alaska Airlines
10 Nov
PDX07:09Portland
17h 36m
1 stop
SYD19:45Sydney Kingsford Smith
12 Dec
SYD21:40Sydney Kingsford Smith
26h 45m
1 stop
PDX05:25Portland
$1,757
Find similar
Alaska Airlines
10 Nov
PDX07:09Portland
17h 36m
1 stop
SYD19:45Sydney Kingsford Smith
12 Dec
SYD21:40Sydney Kingsford Smith
26h 45m
1 stop
PDX05:25Portland
$1,759
Find similar
Alaska Airlines
2 Nov
PDX09:55Portland
38h 50m
1 stop
SYD19:45Sydney Kingsford Smith
11 Nov
SYD21:40Sydney Kingsford Smith
27h 20m
2 stops
PDX06:00Portland
$1,785
Find similar

Air Canada flights from Portland to Australia

Our best Air Canada deals on Portland to Australia flight tickets
Air Canada
20 Jan
PDX09:50Portland
28h 55m
1 stop
BNE08:45Brisbane
31 Jan
BNE10:45Brisbane
25h 45m
1 stop
PDX18:30Portland
$1,315
Find similar
Air Canada
26 Nov
PDX19:00Portland
19h 45m
1 stop
BNE08:45Brisbane
3 Dec
BNE10:45Brisbane
25h 45m
1 stop
PDX18:30Portland
$1,321
Find similar
Air Canada
6 Mar
PDX09:50Portland
37h 05m
2 stops
BNE16:55Brisbane
27 Mar
BNE09:45Brisbane
16h 30m
1 stop
PDX09:15Portland
$1,365
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Portland to Australia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 78,305 searches. Data last updated 30 October 2025.
Use the filters below to find and compare flights from Portland to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 20/1

09:50-08:45

1 stop28h 55m

Brisbane

Sat 31/1

10:45-18:30

1 stop25h 45m

$1,315

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 26/11

19:00-08:45

1 stop19h 45m

Brisbane

Wed 3/12

10:45-18:30

1 stop25h 45m

$1,321

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 20/1

09:50-08:45

1 stop28h 55m

Brisbane

Sat 31/1

06:10-09:15

2 stops21h 05m

$1,340

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 20/1

19:00-08:45

1 stop19h 45m

Brisbane

Sat 31/1

06:10-09:15

2 stops21h 05m

$1,342

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sat 7/3

17:30-09:30

1 stop21h 00m

Melbourne

Fri 13/3

12:00-22:36

1 stop28h 36m

$1,413

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Tue 24/2

14:40-09:30

1 stop23h 50m

Melbourne

Sat 7/3

12:00-16:28

1 stop23h 28m

$1,442

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sat 7/3

11:48-09:30

2 stops26h 42m

Melbourne

Fri 13/3

12:00-22:36

1 stop28h 36m

$1,448

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sat 21/3

15:50-09:30

1 stop23h 40m

Melbourne

Thu 9/4

09:45-22:31

1 stop29h 46m

$1,451

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sun 22/3

13:35-09:00

1 stop25h 25m

Melbourne

Fri 10/4

10:55-18:36

1 stop24h 41m

$1,537

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sun 22/3

19:30-09:00

1 stop19h 30m

Melbourne

Wed 8/4

10:55-17:38

2 stops23h 43m

$1,545

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

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 $1,506. If you don’t want to visit Australia in September, then you should wait until August to fly from Portland, when ticket prices are also cheap, with an average price of $1,524.

What is the cheapest day to depart on your flight to Australia?

On average, the least expensive day to fly to Australia from Portland is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $1,227. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Portland to Australia on a Sunday will generally be more expensive and average around $1,992. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Australia?

According to our data, the cheapest time of day to fly to Australia is in the morning. momondo users have found flights departing from Portland to Australia in the morning for as low as $1,377. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Australia are more costly in the afternoon, with an average ticket price of $1,786. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight 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 $1,686 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 $1,542 on momondo.

Can stopping save me money on Portland to Australia flights?

You could potentially save up to 7% 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

Direct flights

None
There are no direct flights from Portland to Australia. There are no popular flight routes from Portland to Australia.
Search flight deals

  • 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?

  • 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 AirlinesPriceFrom $1,260Free cancellationRating
7.4
8,998 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.

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