Find flights
When to book
Airlines
FAQs

Cheap flights from Portland to Australia from $557

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
8 Jul — 15 Jul1
1 adult

Cheap flight deals from Portland to Australia

Keep the following information in mind while searching for Portland to Australia flight deals. Data was last updated 3 July 2025.

Round-trip from

$1,071

One-way from

$557

Popular in

December

Cheapest in

May

Average price

$1,765
Alaska Airlines
  • Alaska Airlines
  • 2/8-15/8
  • 2 total stops
  • 46h 56m total
  • Portland to Australia
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 12/8
  • 1 total stop
  • 23h 15m total
  • Portland to Australia
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($426 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($81 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Portland to Australia

Cheapest flights from Portland to Australia
Explore the most affordable flight options available from Portland to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 July 2025.

Sat 2/810:30PDX - SYD
1 stop27h 35mAlaska Airlines
Fri 15/809:10SYD - PDX
1 stop19h 21mAlaska Airlines
Deal found 1/7$1,071
Sat 6/914:56PDX - SYD
1 stop23h 09mQantas Airways
Wed 17/917:45SYD - PDX
1 stop19h 45mQantas Airways
Deal found 2/7$1,177
Fri 5/919:40PDX - SYD
1 stop18h 40mAir Canada
Thu 18/909:20SYD - PDX
1 stop17h 01mAir Canada
Deal found 2/7$1,214
Tue 5/812:55PDX - SYD
2 stops25h 05mUnited Airlines
Tue 26/809:30SYD - PDX
2 stops22h 36mUnited Airlines
Deal found 2/7$1,253
Fri 8/812:35PDX - SYD
1 stop25h 00mDelta
Thu 28/809:25SYD - PDX
1 stop19h 14mDelta
Deal found 2/7$1,266
Sun 17/817:40PDX - OOL
2 stops35h 25mMultiple Airlines
Wed 3/909:15OOL - PDX
2 stops29h 04mMultiple Airlines
Deal found 1/7$1,445
Fri 29/817:35PDX - BNE
2 stops24h 05mQantas Airways
Fri 12/914:15BNE - PDX
2 stops24h 04mQantas Airways
Deal found 2/7$1,491
Wed 6/817:40PDX - BNE
2 stops34h 50mMultiple Airlines
Wed 27/808:15BNE - PDX
2 stops27h 55mMultiple Airlines
Deal found 2/7$1,546
Wed 26/1119:38PDX - BNE
1 stop17h 52mUnited Airlines
Mon 15/1211:40BNE - PDX
1 stop16h 48mUnited Airlines
Deal found 1/7$1,623
Fri 1/815:25PDX - MEL
2 stops27h 55mAir Canada
Fri 8/806:00MEL - PDX
2 stops25h 50mAir Canada
Deal found 2/7$1,631
Tue 5/805:25PDX - OOL
2 stops37h 50mUnited Airlines
Wed 27/806:00OOL - PDX
2 stops23h 43mUnited Airlines
Deal found 2/7$1,672
Sun 3/806:10PDX - OOL
2 stops35h 30mQantas Airways
Mon 25/818:40OOL - PDX
2 stops42h 50mQantas Airways
Deal found 2/7$1,673

Cheapflights 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, Cheapflights users made 647,157 searches. Data last updated 3 July 2025.
Use the filters below to find and compare flights from Portland to Australia that are best for you.

Fly from

Portland

Fly to

Australia

Route

Depart

Return

Price

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 2/8

10:30-07:05

1 stop27h 35m

Sydney Kingsford Smith

Fri 15/8

09:10-11:31

1 stop19h 21m

$1,071

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 6/9

14:56-07:05

1 stop23h 09m

Sydney Kingsford Smith

Wed 17/9

17:45-20:30

1 stop19h 45m

$1,177

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 5/9

19:40-07:20

1 stop18h 40m

Sydney Kingsford Smith

Thu 18/9

09:20-09:21

1 stop17h 01m

$1,214

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 5/8

12:55-07:00

2 stops25h 05m

Sydney Kingsford Smith

Tue 26/8

09:30-15:06

2 stops22h 36m

$1,253

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 8/8

12:35-06:35

1 stop25h 00m

Sydney Kingsford Smith

Thu 28/8

09:25-11:39

1 stop19h 14m

$1,266

PortlandCoolangatta

PDX - OOL

PDXOOL

Portland

Sun 17/8

17:40-22:05

2 stops35h 25m

Coolangatta Gold Coast

Wed 3/9

09:15-21:19

2 stops29h 04m

$1,445

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Fri 29/8

17:35-10:40

2 stops24h 05m

Brisbane

Fri 12/9

14:15-21:19

2 stops24h 04m

$1,491

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 6/8

17:40-21:30

2 stops34h 50m

Brisbane

Wed 27/8

08:15-19:10

2 stops27h 55m

$1,546

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 26/11

19:38-07:30

1 stop17h 52m

Brisbane

Mon 15/12

11:40-10:28

1 stop16h 48m

$1,623

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Fri 1/8

15:25-12:20

2 stops27h 55m

Melbourne

Fri 8/8

06:00-14:50

2 stops25h 50m

$1,631

Flights are sorted by cheapest return flights first.

Deals found on 30/6

Showing 1-10 of 57 results
1
2
3
...
6

Best time to book a flight from Portland to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Portland with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Australia

What is the cheapest month to book a flight from Portland to Australia?

Currently, May is the cheapest month in which you can book a flight from Portland to Australia (average of $129). Flying from Portland to Australia in October is currently the most expensive (average of $171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PDX to AU?

Find hourly flight availability from Portland to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 July 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland to Australia as you normally would.

Reviews of airlines servicing Australia

Get insights into the airlines that provide service to Australia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Australia. Reviews last updated 3 July 2025.
Check out reviews from past customers who have flown with Air Tahiti Nui, ANA, andSingapore Airlines from Portland to Australia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Crew

9.0

Overall

8.7

Entertainment

7.3

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.7
Very Good
64 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Crew

9.0

Overall

8.7

Entertainment

7.3

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
ANA
8.4
Very Good
892 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Crew

9.0

Overall

8.7

Entertainment

7.3

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Singapore Airlines
8.1
Very Good
1,320 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Crew

9.0

Overall

8.7

Entertainment

7.3

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Delta
8.0
Very Good
7,982 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Crew

9.0

Overall

8.7

Entertainment

7.3

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air New Zealand
8.0
Very Good
486 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Crew

9.0

Overall

8.7

Entertainment

7.3

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Related info for your journey

Find useful and relevant information for your journey from Portland to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Portland to Australia?

    If you book a flight to Australia from Portland, you will be flying from Portland, which is the city’s only airport. Portland (PDX) is located 9.7 km from the centre of Portland.

  • What are the cheapest airlines to fly from Portland to Australia one-way?

    The cheapet airlines for a one-way flight from Portland to Australia are Alaska Airlines ($557), Qantas Airways ($596), and American Airlines ($610).

  • What are the most popular routes from Portland to Australia?

    When deciding which route to take from Portland to Australia, consider Portland - Sydney Kingsford Smith, Portland - Brisbane or Portland - Melbourne, as they are the most popular.

  • Can I find deals for flights from Portland to Australia that include hotel bookings?

    Yes. In addition to deals on Portland to Australia flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portland to Australia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Australia.

  • Can I find deals for business class flights from Portland to Australia?

    Yes. Cheapflights offers flight deals from Portland to Australia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland to Australia?

    Currently, May is the cheapest month in which you can book a flight from Portland to Australia (average of $129). Flying from Portland to Australia in October is currently the most expensive (average of $171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portland to Australia

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Sydney flights
Portland to Brisbane flights
Portland to Melbourne flights
Portland to Perth flights
Eugene to Sydney flights
Boise to Sydney flights
Portland to Coolangatta flights

Top airline flying from Portland to Australia

Discover the top airline that operate flights from Portland to Australia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 3 July 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,396Average$2,189FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portland to Australia?

Cheapflights helps you search for flights from Portland to Australia via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Portland to Australia?

Cheapflights helps you find that perfect flight to Australia from Portland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Portland to Australia with no change fees?

Yes, we can. To see specific flights from Portland to Australia with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Portland to Australia become cheaper?

Yes, Cheapflights offers price alerts on Portland to Australia flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2025 Cheapflights