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$366+ Cheap flights from Portland (PDX) to Australia

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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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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 July 3, 2025.

Round-trip from

$704
(SmartFares)

One-way from

$366
(Alaska Airlines)

Popular in

December

Cheapest in

May

Average price

$1,160
From Portland to Australia
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One-way flight from Portland to Australia
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($184 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This SmartFares deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/210:30 amPDX - SYD
1 stop27h 35mAlaska Airlines
Fri 8/159:10 amSYD - PDX
1 stop19h 21mAlaska Airlines
Deal found 7/1$704
This Cheapflightsfares deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/62:56 pmPDX - SYD
1 stop23h 09mQantas Airways
Wed 9/175:45 pmSYD - PDX
1 stop19h 45mQantas Airways
Deal found 7/2$774
This FlightHub deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/57:40 pmPDX - SYD
1 stop18h 40mAir Canada
Thu 9/189:20 amSYD - PDX
1 stop17h 01mAir Canada
Deal found 7/2$798
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/51:37 pmPDX - SYD
1 stop24h 18mUnited Airlines
Wed 8/2710:20 amSYD - PDX
1 stop21h 22mUnited Airlines
Deal found 7/2$824
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/812:35 pmPDX - SYD
1 stop25h 00mDelta
Thu 8/289:25 amSYD - PDX
1 stop19h 14mDelta
Deal found 7/2$832
This Trip.com deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/175:40 pmPDX - OOL
2 stops35h 25mMultiple Airlines
Wed 9/39:15 amOOL - PDX
2 stops29h 04mMultiple Airlines
Deal found 7/1$950
This Cheapflightsfares deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/295:35 pmPDX - BNE
2 stops24h 05mQantas Airways
Fri 9/122:15 pmBNE - PDX
2 stops24h 04mQantas Airways
Deal found 7/2$980
This Expedia deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/65:40 pmPDX - BNE
2 stops34h 50mMultiple Airlines
Wed 8/278:15 amBNE - PDX
2 stops27h 55mMultiple Airlines
Deal found 7/2$1,016
This Air Canada deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/43:25 pmPDX - MEL
2 stops26h 40mAir Canada
Mon 8/116:00 amMEL - PDX
2 stops25h 50mAir Canada
Deal found 7/3$1,064
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/267:38 pmPDX - BNE
1 stop17h 52mUnited Airlines
Mon 12/1511:40 amBNE - PDX
1 stop16h 48mUnited Airlines
Deal found 7/1$1,067
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/55:25 amPDX - OOL
2 stops37h 50mUnited Airlines
Wed 8/276:00 amOOL - PDX
2 stops23h 43mUnited Airlines
Deal found 7/2$1,099
This Qantas Airways deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/36:10 amPDX - OOL
2 stops35h 30mQantas Airways
Tue 8/266:40 pmOOL - PDX
2 stops42h 50mQantas Airways
Deal found 7/2$1,100

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated July 3, 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 8/2

10:30 am-7:05 am

1 stop27h 35m

Sydney Kingsford Smith

Fri 8/15

9:10 am-11:31 am

1 stop19h 21m

$704

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 9/6

2:56 pm-7:05 am

1 stop23h 09m

Sydney Kingsford Smith

Wed 9/17

5:45 pm-8:30 pm

1 stop19h 45m

$774

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 9/5

7:40 pm-7:20 am

1 stop18h 40m

Sydney Kingsford Smith

Thu 9/18

9:20 am-9:21 am

1 stop17h 01m

$798

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 8/5

12:55 pm-7:00 am

2 stops25h 05m

Sydney Kingsford Smith

Tue 8/26

9:30 am-3:06 pm

2 stops22h 36m

$824

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 8/8

12:35 pm-6:35 am

1 stop25h 00m

Sydney Kingsford Smith

Thu 8/28

9:25 am-11:39 am

1 stop19h 14m

$832

PortlandCoolangatta

PDX - OOL

PDXOOL

Portland

Sun 8/17

5:40 pm-10:05 pm

2 stops35h 25m

Coolangatta Gold Coast

Wed 9/3

9:15 am-9:19 pm

2 stops29h 04m

$950

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Fri 8/29

5:35 pm-10:40 am

2 stops24h 05m

Brisbane

Fri 9/12

2:15 pm-9:19 pm

2 stops24h 04m

$980

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 8/6

5:40 pm-9:30 pm

2 stops34h 50m

Brisbane

Wed 8/27

8:15 am-7:10 pm

2 stops27h 55m

$1,016

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Mon 8/4

3:25 pm-11:05 am

2 stops26h 40m

Melbourne

Mon 8/11

6:00 am-2:50 pm

2 stops25h 50m

$1,064

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 11/26

7:38 pm-7:30 am

1 stop17h 52m

Brisbane

Mon 12/15

11:40 am-10:28 am

1 stop16h 48m

$1,067

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 57 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 round-trip 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, February is the cheapest month in which you can book a flight from Portland to Australia (average of $1,040). Flying from Portland to Australia in December is currently the most expensive (average of $1,630). 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 July 3, 2025.

When flying from Portland to Australia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 July 3, 2025.
See what other customers who have flown with Air Tahiti Nui, ANA, and Singapore Airlines from Portland to Australia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

Overall

8.7

Crew

9.0

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

Boarding

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

Overall

8.7

Crew

9.0

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
893 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

Overall

8.7

Crew

9.0

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

Boarding

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

Overall

8.7

Crew

9.0

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

Boarding

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

Overall

8.7

Crew

9.0

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

Boarding

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

Overall

8.7

Crew

9.0

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?

    For a flight from Portland to Australia, you will be flying from Portland. Portland (PDX) is just 6.0 mi from the center of the city.

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

    To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $366. Qantas Airways flights start at $392 while deals on American Airlines start at $401 one-way.

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

    The most popular flight routes from Portland to Australia are Portland - Sydney Kingsford Smith, Portland - Brisbane and Portland - Melbourne.

  • 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 vacation 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, February is the cheapest month in which you can book a flight from Portland to Australia (average of $1,040). Flying from Portland to Australia in December is currently the most expensive (average of $1,630). 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

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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.
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Top 9 airlines flying from Portland to Australia

Discover the top 9 airlines 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 2,558,603 searches. Data last updated July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$456Average$1,160FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$680Average$1,159FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$849Average$1,256FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$872Average$1,290FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$929Average$1,566FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$1,055Average$1,179FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$1,068Average$1,223FlexibilityNo cancel feeOn-time75%
Qatar AirwaysCheapest$1,288Average$1,362FlexibilityNo cancel feeOn-time68%
Singapore AirlinesCheapest$1,374Average$1,473FlexibilityNo cancel feeOn-time81%

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