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Cheap flights from Portland to Australia from $839

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
3 Apr — 10 Apr1
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 29 March 2025.

Round-trip from

$1,505

One-way from

$839

Popular in

December

Cheapest in

February

Average price

$1,721
Air Canada
  • Air Canada
  • 2/9-12/9
  • 2 total stops
  • 49h 21m total
  • Portland to Australia
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 8/4
  • 2 total stops
  • 30h 17m total
  • Portland to Australia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($382 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($93 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2025
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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 29 March 2025.

Tue 2/1215:25PDX - SYD
1 stop23h 10mAir Canada
Tue 16/1211:20SYD - PDX
1 stop22h 24mAir Canada
Deal found 28/3$1,425
Mon 10/1119:05PDX - SYD
2 stops24h 35mMultiple Airlines
Fri 12/1207:05SYD - PDX
2 stops21h 29mMultiple Airlines
Deal found 29/3$1,624
Tue 17/619:40PDX - MEL
2 stops22h 25mAir Canada
Tue 22/706:00MEL - PDX
2 stops20h 35mAir Canada
Deal found 28/3$1,670
Sun 3/819:40PDX - MEL
2 stops22h 45mMultiple Airlines
Sun 10/821:40MEL - PDX
2 stops34h 05mMultiple Airlines
Deal found 28/3$1,673
Tue 14/1015:25PDX - BNE
1 stop22h 40mAir Canada
Tue 4/1110:45BNE - PDX
1 stop16h 49mAir Canada
Deal found 28/3$1,778
Sat 10/517:39PDX - SYD
1 stop20h 26mAlaska Airlines
Sat 17/509:10SYD - PDX
1 stop28h 38mAlaska Airlines
Deal found 28/3$1,816
Sun 18/512:55PDX - MEL
2 stops26h 20mUnited Airlines
Sun 1/610:55MEL - PDX
1 stop18h 27mUnited Airlines
Deal found 28/3$1,959
Fri 29/819:40PDX - BNE
2 stops22h 00mMultiple Airlines
Fri 12/920:45BNE - PDX
2 stops29h 46mMultiple Airlines
Deal found 28/3$1,996
Wed 28/513:00PDX - SYD
1 stop24h 35mDelta
Tue 1/709:25SYD - PDX
1 stop23h 40mDelta
Deal found 28/3$2,010
Sat 21/623:59PDX - SYD
2 stops38h 01mUnited Airlines
Sun 29/610:20SYD - PDX
1 stop31h 25mUnited Airlines
Deal found 28/3$2,015
Mon 1/913:24PDX - PER
2 stops31h 31mQatar Airways
Fri 12/915:20PER - PDX
2 stops47h 39mQatar Airways
Deal found 27/3$2,090
Wed 16/715:00PDX - SYD
1 stop23h 30mAmerican Airlines
Sun 27/717:45SYD - PDX
1 stop21h 29mAmerican Airlines
Deal found 29/3$2,101

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 29 March 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

Tue 2/9

15:25-07:20

1 stop22h 55m

Sydney Kingsford Smith

Fri 12/9

09:20-18:46

1 stop26h 26m

$1,505

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Tue 17/6

19:40-11:05

2 stops22h 25m

Melbourne

Tue 22/7

06:00-09:35

2 stops20h 35m

$1,670

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sun 3/8

19:40-11:25

2 stops22h 45m

Melbourne

Sun 10/8

21:40-14:45

2 stops34h 05m

$1,673

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 14/8

15:25-07:20

1 stop22h 55m

Sydney Kingsford Smith

Sun 17/8

07:05-09:35

2 stops19h 30m

$1,731

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 18/6

19:40-07:05

1 stop18h 25m

Brisbane

Tue 8/7

10:20-14:45

1 stop21h 25m

$1,812

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 10/5

17:39-07:05

1 stop20h 26m

Sydney Kingsford Smith

Sat 17/5

09:10-20:48

1 stop28h 38m

$1,816

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sun 18/5

12:55-08:15

2 stops26h 20m

Melbourne

Sun 1/6

10:55-12:22

1 stop18h 27m

$1,959

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Fri 29/8

19:40-10:40

2 stops22h 00m

Brisbane

Fri 12/9

20:45-09:31

2 stops29h 46m

$1,996

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 28/5

13:00-06:35

1 stop24h 35m

Sydney Kingsford Smith

Tue 1/7

09:25-16:05

1 stop23h 40m

$2,010

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 21/6

23:59-07:00

2 stops38h 01m

Sydney Kingsford Smith

Sun 29/6

10:20-00:45

1 stop31h 25m

$2,015

Flights are sorted by cheapest return flights first.

Deals found on 28/3

Showing 1-10 of 46 results
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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 29 March 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.

Rainfall in Australia by month

Plan your trip to Australia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Australia ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Australia when rainfall is around 50.0 mm.

Temperature in Australia by month

Plan your trip to Australia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Australia, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

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 29 March 2025.
Read through reviews of airlines operating flights from Portland to Australia, such as Air Tahiti Nui, Asiana Airlines and Singapore Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Crew

9.1

Overall

8.7

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
61 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Crew

9.1

Overall

8.7

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.
Asiana Airlines
8.2
Very Good
440 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Crew

9.1

Overall

8.7

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
1,285 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Crew

9.1

Overall

8.7

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.
Fiji Airways
8.0
Very Good
182 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Crew

9.1

Overall

8.7

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.
Emirates
8.0
Very Good
3,192 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Crew

9.1

Overall

8.7

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 ($839), United Airlines ($1,182), and Philippine Airlines ($1,349).

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

    When deciding which route to take from Portland to Australia, consider Portland - Melbourne, Portland - Sydney Kingsford Smith or Portland - Brisbane, 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

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Alternative routes for Portland to Australia

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Melbourne flights
Portland to Sydney flights
Portland to Brisbane flights
Portland to Perth flights
Boise to Sydney flights
Eugene 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 29 March 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,193Average$1,850FlexibilityNo 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.

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