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Cheap flights from Portland to Australia from $802

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 29/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

United Airlines Logo
19:35 - 06:55PDX-SYD
18h 20m1 stop
United Airlines Logo
10:20 - 14:42SYD-PDX
21h 22m1 stop
$1,408United Airlines
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Thu, 28 Aug - Thu, 11 Sep
Air Canada Logo
19:00 - 09:35PDX-SYD
19h 35m1 stop
Air Canada Logo
11:20 - 09:15SYD-PDX
16h 55m1 stop
$1,459Air Canada
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Wed, 11 Feb - Sat, 28 Feb
Logo
19:00 - 13:00PDX-SYD
23h 00m2 stops
Logo
11:20 - 14:45SYD-PDX
22h 25m1 stop
$1,462
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Mon, 9 Feb - Wed, 18 Feb
Logo
17:41 - 13:00PDX-MEL
25h 19m2 stops
Logo
14:15 - 20:50MEL-PDX
25h 35m2 stops
$1,490
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Wed, 29 Oct - Wed, 5 Nov
Delta Logo
13:00 - 08:30PDX-SYD
24h 30m1 stop
Delta Logo
14:15 - 20:44SYD-PDX
25h 29m1 stop
$1,507Delta
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Fri, 30 Jan - Sat, 14 Feb
Delta Logo
15:35 - 06:35PDX-SYD
22h 00m2 stops
Delta Logo
09:25 - 11:45SYD-PDX
19h 20m1 stop
$1,513Delta
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Thu, 11 Sep - Sat, 20 Sep
Qantas Airways Logo
14:40 - 06:00PDX-BNE
21h 20m1 stop
Qantas Airways Logo
19:25 - 23:59BNE-PDX
22h 34m1 stop
$1,559Qantas Airways
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Tue, 20 Jan - Sat, 31 Jan
American Airlines Logo
14:56 - 05:25PDX-BNE
21h 29m1 stop
American Airlines Logo
20:05 - 21:16BNE-PDX
18h 11m1 stop
$1,603American Airlines
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Fri, 29 Aug - Fri, 12 Sep
American Airlines Logo
08:31 - 05:25PDX-BNE
27h 54m1 stop
American Airlines Logo
20:05 - 21:16BNE-PDX
18h 11m1 stop
$1,605American Airlines
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Wed, 10 Sep - Wed, 17 Sep
Qantas Airways Logo
14:50 - 06:10PDX-SYD
20h 20m1 stop
Qantas Airways Logo
07:45 - 13:21SYD-PDX
24h 36m2 stops
$1,623Qantas Airways
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Fri, 6 Feb - Mon, 23 Feb

United Airlines flights from Portland to Australia

Our best United Airlines deals on Portland to Australia flight tickets
United Airlines
28 Aug
PDX19:35Portland
18h 20m
1 stop
SYD06:55Sydney Kingsford Smith
11 Sept
SYD10:20Sydney Kingsford Smith
21h 22m
1 stop
PDX14:42Portland
$1,408
Find similar
United Airlines
23 Aug
PDX15:46Portland
22h 09m
1 stop
SYD06:55Sydney Kingsford Smith
5 Sept
SYD10:20Sydney Kingsford Smith
19h 23m
1 stop
PDX12:43Portland
$1,496
Find similar
United Airlines
28 Aug
PDX10:55Portland
27h 05m
2 stops
SYD07:00Sydney Kingsford Smith
11 Sept
SYD09:30Sydney Kingsford Smith
28h 31m
2 stops
PDX21:01Portland
$1,497
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Air Canada flights from Portland to Australia

Our best Air Canada deals on Portland to Australia flight tickets
Air Canada
11 Feb
PDX19:00Portland
19h 35m
1 stop
SYD09:35Sydney Kingsford Smith
28 Feb
SYD11:20Sydney Kingsford Smith
16h 55m
1 stop
PDX09:15Portland
$1,459
Find similar
Air Canada
11 Feb
PDX15:15Portland
23h 20m
1 stop
SYD09:35Sydney Kingsford Smith
28 Feb
SYD15:00Sydney Kingsford Smith
37h 15m
2 stops
PDX09:15Portland
$1,477
Find similar
Air Canada
11 Sept
PDX19:40Portland
18h 40m
1 stop
SYD07:20Sydney Kingsford Smith
20 Sept
SYD18:00Sydney Kingsford Smith
32h 21m
2 stops
PDX09:21Portland
$1,483
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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 18 August 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

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 28/8

19:35-06:55

1 stop18h 20m

Sydney Kingsford Smith

Thu 11/9

10:20-14:42

1 stop21h 22m

$1,408

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 11/2

19:00-09:35

1 stop19h 35m

Sydney Kingsford Smith

Sat 28/2

11:20-09:15

1 stop16h 55m

$1,459

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 9/2

19:00-13:00

2 stops23h 00m

Sydney Kingsford Smith

Wed 18/2

11:20-14:45

1 stop22h 25m

$1,462

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Wed 29/10

17:41-13:00

2 stops25h 19m

Melbourne

Wed 5/11

14:15-20:50

2 stops25h 35m

$1,490

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 30/1

13:00-08:30

1 stop24h 30m

Sydney Kingsford Smith

Sat 14/2

14:15-20:44

1 stop25h 29m

$1,507

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 11/9

15:35-06:35

2 stops22h 00m

Sydney Kingsford Smith

Sat 20/9

09:25-11:45

1 stop19h 20m

$1,513

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 20/1

14:40-06:00

1 stop21h 20m

Brisbane

Sat 31/1

19:25-23:59

1 stop22h 34m

$1,559

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Fri 29/8

14:56-05:25

1 stop21h 29m

Brisbane

Fri 12/9

20:05-21:16

1 stop18h 11m

$1,603

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 10/9

08:31-05:25

1 stop27h 54m

Brisbane

Wed 17/9

20:05-21:16

1 stop18h 11m

$1,605

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 6/2

14:50-06:10

1 stop20h 20m

Sydney Kingsford Smith

Mon 23/2

07:45-13:21

2 stops24h 36m

$1,623

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Australia from

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 $1,534. If you don’t want to visit Australia in September, then you should wait until May to fly from Portland, when ticket prices are also cheap, with an average price of $1,596.

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 $1,243. 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 $2,018. 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 $1,395. 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 $1,809. 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 $1,751 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 $1,419 on momondo.

Can stopping save me money on Portland to Australia flights?

You could potentially save up to 34% 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

$802

Fastest flight time

17h 45m

Direct flights

None

Airports in Australia

6 airports
The best one-way flight to Australia from Portland in the past 72 hours is $802. The best return flight deal from Portland to Australia found on momondo in the last 72 hours is $1,408.
The fastest flight from Portland to Australia takes 17h 45m
There are no direct flights from Portland to Australia. Popular non-direct routes for this connection are Portland Airport - Melbourne Airport, Portland Airport - Sydney Kingsford Smith Airport and Portland Airport - Brisbane Airport.
There are 6 airports near Australia: Melbourne Avalon (AVV), Melbourne (MEL), Townsville (TSV), Brisbane (BNE), Perth (PER), Sydney Kingsford Smith (SYD)
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  • 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 $1,305Free cancellationRating
7.4
8,925 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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