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Cheap flights from Portland to Australia from $533

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 9/26. 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 round-trip flights

Air Canada Logo
7:00 pm - 2:45 pmPDX-MEL
24h 45m2 stops
Air Canada Logo
8:10 am - 2:45 pmMEL-PDX
25h 35m2 stops
$845Air Canada
Find Deal
Wed, Nov 5 - Wed, Nov 19
Air Canada Logo
7:00 pm - 3:35 pmPDX-MEL
25h 35m2 stops
Air Canada Logo
8:10 am - 2:45 pmMEL-PDX
25h 35m2 stops
$853Air Canada
Find Deal
Sun, Jan 11 - Sun, Jan 18
Air Canada Logo
3:15 pm - 9:35 amPDX-SYD
23h 20m1 stop
Air Canada Logo
7:15 pm - 9:15 amSYD-PDX
33h 00m2 stops
$868Air Canada
Find Deal
Wed, Nov 26 - Mon, Dec 15
Qantas Airways Logo
2:50 pm - 7:05 amPDX-SYD
23h 15m1 stop
Qantas Airways Logo
5:45 pm - 9:16 pmSYD-PDX
20h 31m1 stop
$922Qantas Airways
Find Deal
Thu, Sep 11 - Thu, Sep 18
Qantas Airways Logo
2:56 pm - 7:05 amPDX-SYD
23h 09m1 stop
Qantas Airways Logo
9:10 am - 1:24 pmSYD-PDX
21h 14m1 stop
$942Qantas Airways
Find Deal
Fri, Sep 26 - Fri, Oct 3
American Airlines Logo
2:56 pm - 7:30 amPDX-SYD
23h 34m1 stop
American Airlines Logo
9:10 am - 4:44 pmSYD-PDX
24h 34m2 stops
$944American Airlines
Find Deal
Fri, Sep 26 - Fri, Oct 3
American Airlines Logo
3:23 pm - 7:05 amPDX-SYD
22h 42m2 stops
American Airlines Logo
5:45 pm - 11:11 pmSYD-PDX
22h 26m2 stops
$957American Airlines
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Thu, Sep 11 - Thu, Sep 18
United Airlines Logo
6:00 am - 9:05 amPDX-SYD
32h 05m2 stops
United Airlines Logo
11:50 am - 10:52 pmSYD-PDX
30h 02m2 stops
$969United Airlines
Find Deal
Fri, Nov 28 - Fri, Dec 5
United Airlines Logo
11:59 pm - 7:00 amPDX-SYD
36h 01m2 stops
United Airlines Logo
11:50 am - 6:36 pmSYD-PDX
25h 46m2 stops
$973United Airlines
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Fri, Nov 21 - Thu, Nov 27
Delta Logo
5:10 pm - 7:45 amPDX-BNE
20h 35m1 stop
Delta Logo
10:45 am - 12:33 pmBNE-PDX
19h 48m1 stop
$1,066Delta
Find Deal
Mon, Dec 15 - Wed, Dec 24

American Airlines flights from Portland to Australia

Our best American Airlines deals on Portland to Australia flight tickets
American Airlines
Sep 26
PDX2:56 pmPortland
23h 34m
1 stop
SYD7:30 amSydney Kingsford Smith
Oct 3
SYD9:10 amSydney Kingsford Smith
24h 34m
2 stops
PDX4:44 pmPortland
$944
Find similar
American Airlines
Sep 11
PDX3:23 pmPortland
22h 42m
2 stops
SYD7:05 amSydney Kingsford Smith
Sep 18
SYD5:45 pmSydney Kingsford Smith
22h 26m
2 stops
PDX11:11 pmPortland
$957
Find similar
American Airlines
Jan 30
PDX12:12 pmPortland
22h 58m
2 stops
SYD6:10 amSydney Kingsford Smith
Feb 14
SYD5:45 pmSydney Kingsford Smith
24h 01m
1 stop
PDX10:46 pmPortland
$958
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United Airlines flights from Portland to Australia

Our best United Airlines deals on Portland to Australia flight tickets
United Airlines
Nov 28
PDX6:00 amPortland
32h 05m
2 stops
SYD9:05 amSydney Kingsford Smith
Dec 5
SYD11:50 amSydney Kingsford Smith
30h 02m
2 stops
PDX10:52 pmPortland
$969
Find similar
United Airlines
Aug 16
PDX12:55 pmPortland
25h 05m
2 stops
SYD7:00 amSydney Kingsford Smith
Aug 23
SYD9:30 amSydney Kingsford Smith
29h 53m
2 stops
PDX10:23 pmPortland
$973
Find similar
United Airlines
Nov 28
PDX6:00 amPortland
32h 05m
2 stops
SYD9:05 amSydney Kingsford Smith
Dec 12
SYD2:00 pmSydney Kingsford Smith
29h 44m
1 stop
PDX12:44 amPortland
$975
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momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated August 14, 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

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Wed 11/5

7:00 pm-2:45 pm

2 stops24h 45m

Melbourne

Wed 11/19

8:10 am-2:45 pm

2 stops25h 35m

$845

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sun 1/11

7:00 pm-3:35 pm

2 stops25h 35m

Melbourne

Sun 1/18

8:10 am-2:45 pm

2 stops25h 35m

$853

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 11/26

3:15 pm-9:35 am

1 stop23h 20m

Sydney Kingsford Smith

Mon 12/15

7:15 pm-9:15 am

2 stops33h 00m

$868

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 9/11

2:50 pm-7:05 am

1 stop23h 15m

Sydney Kingsford Smith

Thu 9/18

5:45 pm-9:16 pm

1 stop20h 31m

$922

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 9/26

2:56 pm-7:05 am

1 stop23h 09m

Sydney Kingsford Smith

Fri 10/3

9:10 am-1:24 pm

1 stop21h 14m

$942

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 9/26

2:56 pm-7:30 am

1 stop23h 34m

Sydney Kingsford Smith

Fri 10/3

9:10 am-4:44 pm

2 stops24h 34m

$944

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 9/11

3:23 pm-7:05 am

2 stops22h 42m

Sydney Kingsford Smith

Thu 9/18

5:45 pm-11:11 pm

2 stops22h 26m

$957

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 11/28

6:00 am-9:05 am

2 stops32h 05m

Sydney Kingsford Smith

Fri 12/5

11:50 am-10:52 pm

2 stops30h 02m

$969

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 11/21

11:59 pm-7:00 am

2 stops36h 01m

Sydney Kingsford Smith

Thu 11/27

11:50 am-6:36 pm

2 stops25h 46m

$973

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Mon 12/15

5:10 pm-7:45 am

1 stop20h 35m

Brisbane

Wed 12/24

10:45 am-12:33 pm

1 stop19h 48m

$1,066

Flights are sorted by cheapest round-trip 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?

The month of September is, on average, the cheapest month to fly to Australia from Portland, with most prices found around $999. If you aren’t able to travel during the month of September, then book flights to Australia from Portland during May instead. Flights to Australia in May, while not as cheap as those in September, still average around $1,039.

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

The cheapest day to depart from Portland to Australia is on a Saturday. Travelers who choose to depart for Australia on a Saturday will often find tickets for as low as $1,040. On the other hand, Thursday is the most expensive day to depart from Portland because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,146.

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

Flying to Australia from Portland in the morning is the least expensive time of day to depart. momondo users have found prices as low as $1,060 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,135 on average. Flights to Australia from Portland at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $1,140 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Portland for as low as $924 on momondo.

Can stopping save me money on Portland to Australia flights?

You could potentially save up to 4% 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

$533

Fastest flight time

17h 36m

Direct flights

None

Airports in Australia

7 airports
The best one-way flight to Australia from Portland in the past 72 hours is $533. The best round-trip flight deal from Portland to Australia found on momondo in the last 72 hours is $845.
The fastest flight from Portland to Australia takes 17h 36m
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 7 airports near Australia: Melbourne Avalon (AVV), Melbourne (MEL), Townsville (TSV), Brisbane (BNE), Adelaide (ADL), 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?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Australia.

  • What documentation or ID do you need to fly to Australia?

    The necessary travel and health documents for your Australia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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
DeltaPriceFrom $456Free CancellationRating
8.0
7,980 reviews
Search Delta flights
Air CanadaPriceFrom $840Free CancellationRating
7.1
9,949 reviews
Search Air Canada flights
United AirlinesPriceFrom $872Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
Qantas AirwaysPriceFrom $906Free CancellationRating
7.5
895 reviews
Search Qantas Airways flights
Hawaiian AirlinesPriceFrom $946Free CancellationRating
7.8
2,656 reviews
Search Hawaiian Airlines flights
American AirlinesPriceFrom $954Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $1,099Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Australia?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Australia from Portland.

Can I find flights from Portland to Australia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Australia from Portland with this policy.

How can momondo help me find flights from Portland to Australia?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Australia from Portland.

I’m not ready to book a flight from Portland to Australia right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Portland to Australia flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to Australia

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