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$518+ 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$931
(SmartFares)

One-way from

$518
(Air Canada)

Popular in

December

Cheapest in

September

Average price

$1,001
From Portland to Australia
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One-way flight from Portland to Australia
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Highest demand for flights based on searches. 9% potential increase in price ($113 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 11, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Mon 9/152:50 pmPDX - SYD
1 stop23h 15mAlaska Airlines
Sat 9/279:10 amSYD - PDX
1 stop27h 00mAlaska Airlines
Deal found 9/10$854
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 9/1310:30 amPDX - SYD
1 stop27h 35mAlaska Airlines
Sat 9/279:10 amSYD - PDX
1 stop27h 00mAlaska Airlines
Deal found 9/10$889
This SmartFares deal was found by Cheapflights users on 9/9. 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.
Sun 9/215:55 pmPDX - SYD
1 stop32h 50mHawaiian Airlines
Sun 10/59:40 pmSYD - PDX
1 stop18h 50mHawaiian Airlines
Deal found 9/9$931
This FlightHub deal was found by Cheapflights users on 9/11. 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.
Tue 9/235:35 pmPDX - SYD
1 stop20h 30mQantas Airways
Tue 9/309:10 amSYD - PDX
1 stop21h 14mQantas Airways
Deal found 9/11$938
This Justfly.com deal was found by Cheapflights users on 9/9. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/102:50 pmPDX - SYD
1 stop23h 15mQantas Airways
Wed 9/175:45 pmSYD - PDX
1 stop18h 25mQantas Airways
Deal found 9/9$939
This Flighttix deal was found by Cheapflights users on 9/9. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1110:55 amPDX - MEL
2 stops28h 20mUnited Airlines
Thu 9/2510:55 amMEL - PDX
2 stops27h 11mUnited Airlines
Deal found 9/9$944
This Gotogate deal was found by Cheapflights users on 9/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/147:40 pmPDX - SYD
2 stops33h 40mAir Canada
Sun 9/289:20 amSYD - PDX
1 stop30h 41mAir Canada
Deal found 9/11$955
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/213:23 pmPDX - SYD
2 stops22h 42mAmerican Airlines
Sun 10/510:10 amSYD - PDX
2 stops24h 56mAmerican Airlines
Deal found 9/10$962
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 9/1210:55 amPDX - MEL
2 stops27h 35mUnited Airlines
Thu 9/2510:55 amMEL - PDX
2 stops27h 11mUnited Airlines
Deal found 9/11$964
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Fri 10/2411:05 amPDX - MEL
1 stop28h 10mUnited Airlines
Fri 10/3112:00 pmMEL - PDX
1 stop30h 26mUnited Airlines
Deal found 9/9$967
This Qantas Airways deal was found by Cheapflights users on 9/11. 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.
Mon 9/152:56 pmPDX - SYD
1 stop23h 09mQantas Airways
Wed 9/175:45 pmSYD - PDX
1 stop19h 45mQantas Airways
Deal found 9/11$970
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/141:59 pmPDX - SYD
2 stops24h 06mAmerican Airlines
Sun 9/285:45 pmSYD - PDX
2 stops22h 26mAmerican Airlines
Deal found 9/11$974

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 September 11, 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 9/23

2:50 pm-7:05 am

1 stop23h 15m

Sydney Kingsford Smith

Tue 9/30

9:10 am-1:24 pm

1 stop21h 14m

$938

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 9/21

3:23 pm-7:05 am

2 stops22h 42m

Sydney Kingsford Smith

Sun 10/5

10:10 am-5:06 pm

2 stops24h 56m

$962

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Fri 10/24

3:50 pm-8:30 am

2 stops22h 40m

Melbourne

Fri 10/31

12:00 pm-8:38 pm

1 stop26h 38m

$967

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 9/15

2:56 pm-7:05 am

1 stop23h 09m

Sydney Kingsford Smith

Wed 9/17

5:45 pm-8:30 pm

1 stop19h 45m

$970

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Sat 2/21

1:35 pm-7:30 am

1 stop23h 55m

Brisbane

Sat 3/14

10:40 am-12:27 pm

1 stop18h 47m

$977

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Fri 11/7

7:38 pm-7:30 am

1 stop17h 52m

Brisbane

Fri 11/21

11:40 am-2:46 pm

1 stop21h 06m

$977

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Thu 10/23

7:35 pm-6:30 am

1 stop17h 55m

Brisbane

Fri 10/31

10:40 am-10:53 am

1 stop17h 13m

$977

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Fri 10/10

3:50 pm-6:30 am

1 stop21h 40m

Brisbane

Fri 10/17

10:30 am-10:14 am

1 stop16h 44m

$978

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sat 10/25

10:50 am-9:00 am

2 stops28h 10m

Melbourne

Sat 11/1

12:00 pm-10:38 am

2 stops40h 38m

$979

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Sat 2/21

9:50 am-8:45 am

1 stop28h 55m

Brisbane

Sun 3/1

10:45 am-2:45 pm

1 stop22h 00m

$982

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 58 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 $1,035). Flying from Portland to Australia in December is currently the most expensive (average of $1,626). 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 September 11, 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 September 11, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and Qantas Airways 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Qantas Airways
7.5
Good
905 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,937 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Air Canada
7.1
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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.

  • How long is the flight from Portland to Australia?

    For as low as $967, Qantas Airways can have you in Australia from Portland in 22h 40m. Airlines will cover a distance of 8111 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    To fly one-way, consider booking your trip with Air Canada, which is currently one of the cheapest options available, starting at $518. Qantas Airways flights start at $538 while deals on United Airlines start at $575 one-way.

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

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

  • 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 $1,035). Flying from Portland to Australia in December is currently the most expensive (average of $1,626). 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 7 airlines flying from Portland to Australia

Discover the top 7 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$456Average$1,128FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$550Average$1,158FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$842Average$1,311FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$872Average$1,269FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$898Average$1,625FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$954Average$1,052FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$1,099Average$1,240FlexibilityNo cancel feeOn-time75%

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